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1.
Cells ; 10(5)2021 05 18.
Artigo em Inglês | MEDLINE | ID: mdl-34070057

RESUMO

According to the present knowledge, this is the first report on establishing transformed root cultures of Leonotis nepetifolia after Rhizobium rhizogenes-mediated transformation. The preliminary phytochemical analysis showed differences in the content of phenols and flavonoids in transformed and nontransformed roots. The dominant compounds in the analyzed extracts were (+)-catechin (5464 and 6808 µg/g DW), p-coumaric acid (2549 and 4907 µg/g DW), m-coumaric acid (1508 and 2048 µg/g DW) and rosmarinic acid (1844 and 2643 µg/g DW) for nontransformed (LNNR) and transformed (LNTR4) roots, respectively. Initial biological studies carried out on LNNR, and LNTR4 extracts showed a cytotoxic effect on the A549 lung, HCC1937 breast and leukemia NALM-6 cell lines, antioxidants, as well as repair and protection against DNA damage induced by H2O2 in HUVEC cells. Due to the stronger effect of the LNTR4 root extract, which can be a relatively efficient and cheap source of bioactive secondary metabolites, further biological analyses are needed to discover in detail their potentially valuable biological properties.


Assuntos
Agrobacterium/genética , Antineoplásicos Fitogênicos/farmacologia , Antioxidantes/farmacologia , Lamiaceae/metabolismo , Compostos Fitoquímicos/farmacologia , Raízes de Plantas/metabolismo , Plantas Geneticamente Modificadas/metabolismo , Transformação Genética , Células A549 , Antineoplásicos Fitogênicos/isolamento & purificação , Antioxidantes/isolamento & purificação , Sobrevivência Celular/efeitos dos fármacos , Dano ao DNA , Reparo do DNA , Interações Hospedeiro-Patógeno , Células Endoteliais da Veia Umbilical Humana/efeitos dos fármacos , Células Endoteliais da Veia Umbilical Humana/metabolismo , Células Endoteliais da Veia Umbilical Humana/patologia , Humanos , Lamiaceae/genética , Lamiaceae/microbiologia , Neoplasias/tratamento farmacológico , Neoplasias/patologia , Estresse Oxidativo/efeitos dos fármacos , Compostos Fitoquímicos/isolamento & purificação , Raízes de Plantas/genética , Raízes de Plantas/microbiologia , Plantas Geneticamente Modificadas/genética , Plantas Geneticamente Modificadas/microbiologia , Metabolismo Secundário
2.
J Sci Food Agric ; 101(9): 3758-3766, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-33301188

RESUMO

BACKGROUND: To investigate the effects of salinity as a serious environmental limiter of productivity on the yield-related traits of Lallemantia iberica, a split-plot experiment was performed for 2 years (2017-2018) based on a randomized complete block design with three replications at Urmia University (37°33'09″N, 45°05'53″E). The main plots included salinity stress at two levels (6.72 dS m-1 , and 0.91 dS m-1 as control), and subplots were inoculants at four levels (Funneliformis mosseae, Thiobacillus sp., F. mosseae + Thiobacillus sp., and no inoculation). RESULTS: In the saline condition, serious reductions in yield and yield components (numbers of capsules per plant, seeds per capsule, and seeds per plant, 1000-seed weight, seed and biological yields), concentrations of leaf phosphorus and potassium, and relative mycorrhizal dependency were observed, but against the harvest index the leaf sulfur and sodium contents were increased. Moreover, all morphological traits (plant height, number of branches and leaves, leaf weight, stem weight, and ratio of leaf weight to stem weight) were decreased under salinity conditions. Mycorrhizal inoculation enhanced the salinity-induced reduction of yield and morphological traits to some extent. Inoculation with Thiobacillus had superiority in some of the yield and morphological characteristics compared with those in the non-inoculated plants. CONCLUSION: Salinity stress can significantly affect the yield, morphological characteristics, nutrients content, and mycorrhizal dependency of L. iberica plants. This study exhibited the significant effects of single and simultaneous applications of F. mosseae and Thiobacillus on plant growth and yield in saline soils. © 2020 Society of Chemical Industry.


Assuntos
Inoculantes Agrícolas/metabolismo , Fungos/metabolismo , Lamiaceae/crescimento & desenvolvimento , Lamiaceae/metabolismo , Micorrizas/metabolismo , Enxofre/metabolismo , Thiobacillus/metabolismo , Lamiaceae/microbiologia , Oxirredução , Fósforo/metabolismo , Folhas de Planta/crescimento & desenvolvimento , Folhas de Planta/metabolismo , Salinidade , Cloreto de Sódio/metabolismo
3.
Int J Syst Evol Microbiol ; 70(5): 3234-3240, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32375979

RESUMO

Two novel Gram-stain-positive, irregular rod-shaped actinomycetes, S-1144T and 4053, were isolated from leaves of Lamiophlomis rotata on the Qinghai-Tibet Plateau, PR China. Cells were aerobic, catalase-positive and oxidase-negative. Colonies on Reasoner's 2A agar were light yellow, circular, shiny, smooth and convex after 2 days of incubation. The isolates grew optimally at 25 °C, pH 7.5 and with 0 % (w/v) NaCl. The results of polyphasic analyses indicated that strain S-1144T belonged to the genus Nocardioides and its close phylogenetic neighbours (16S rRNA gene sequence similarity) were Nocardioides litoris DSM 103718T (98.4 %), Nocardioides rubriscoriae DSM 23986T (98.2%) and Nocardioides plantarum DSM 11054T (97.8 %). The genome of strain S-1144T showed less than 70 % digital DNA-DNA hybridization and < 95-96 % average nucleotide identity values to the above reference strains. The DNA G+C content of strain S-1144T was 73.5 mol%. MK-8(H4) was the predominant respiratory quinone (96.0 %) and llLL-2,6-diaminopimelic acid was the diagnostic diamino acid in the cell-wall peptidoglycan. The polar lipid profile of strain S-1144T consisted of diphosphatidylglycerol, phosphatidylglycerol, three unidentified phospholipids, one unidentified glycolipid and one unidentified lipid. The major cellular fatty acids were iso-C16 : 0, C17 : 1 ω8c, C17 : 0 and C18 : 1 ω9c. On the basis of obtained data, strain S-1144T represented a novel species of the genus Nocardioides, for which the name Nocardioides dongxiaopingii sp. nov. is proposed. The type strain is S-1144T (=CGMCC 4.7568T=JCM 33469T).


Assuntos
Actinobacteria/classificação , Lamiaceae/microbiologia , Filogenia , Actinobacteria/isolamento & purificação , Técnicas de Tipagem Bacteriana , Composição de Bases , China , DNA Bacteriano/genética , Ácido Diaminopimélico/química , Ácidos Graxos/química , Hibridização de Ácido Nucleico , Peptidoglicano/química , Fosfolipídeos/química , Pigmentação , Folhas de Planta/microbiologia , RNA Ribossômico 16S/genética , Análise de Sequência de DNA , Vitamina K 2/análogos & derivados , Vitamina K 2/química
4.
Mol Cell Proteomics ; 18(6): 1210-1226, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-30936209

RESUMO

Lysine acetylation and succinylation are post-translational modifications of proteins that have been shown to play roles in plants response to pathogen infection. Phytoplasma infection can directly alter multiple metabolic processes in the deciduous plant Paulownia and lead to Paulownia witches' broom (PaWB) disease, the major cause of Paulownia mortality worldwide. However, the extent and function of lysine aceylation and succinylation during phytoplasma infection have yet to be explored. Here, we investigated the changes in the proteome, acetylome, and succinylome of phytoplasma-infected Paulownia tomentosa seedlings using quantitative mass spectrometry. In total, we identified 8963 proteins, 2893 acetylated proteins (5558 acetylation sites), and 1271 succinylated proteins (1970 succinylation sites), with 425 (533 sites) simultaneously acetylated and succinylated. Comparative analysis revealed that 276 proteins, 546 acetylated proteins (741 acetylation sites) and 5 succinylated proteins (5 succinylation sites) were regulated in response to phytoplasma infection, suggesting that acetylation may be more important than succinylation in PaWB. Enzymatic assays showed that acetylation of specific sites in protochlorophyllide reductase and RuBisCO, key enzymes in chlorophyll and starch biosynthesis, respectively, modifies their activity in phytoplasma-infected seedlings. On the basis of these results, we propose a model to elucidate the molecular mechanism of responses to PaWB and offer a resource for functional studies on the effects of acetylation on protein function.


Assuntos
Lamiaceae/metabolismo , Lamiaceae/microbiologia , Phytoplasma/fisiologia , Doenças das Plantas/microbiologia , Proteínas de Plantas/metabolismo , Ácido Succínico/metabolismo , Acetilação , Motivos de Aminoácidos , Clorofila/biossíntese , Lisina/metabolismo , Modelos Biológicos , Anotação de Sequência Molecular , Fotossíntese , Proteínas de Plantas/química , Mapas de Interação de Proteínas , Estrutura Secundária de Proteína , Proteoma/metabolismo , Proteômica , Plântula/metabolismo , Amido/metabolismo
5.
PLoS One ; 14(4): e0215024, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30964914

RESUMO

Molecular morphometrics is an emerging third dimensional aspect of fungal species delimitation. They have been demonstrated to be more informative than conventional barcoding methods. Hence in this study, foliar endophytic fungal (FEF) assemblages in three Magnoliopsida plants were delimited using nuclear ribosomal internal transcribed spacer 2 (ITS2) sequence-secondary structural features based phylogenetic analysis, also known as molecular morphometrics. A total of 392 FEF isolates were obtained from the Aglaia elaeagnoidea, Flacourtia inermis, and Premna serratifolia leaves and grouped into 98 morphotypes. Among these host plants, P. serratifolia showed the maximum percentage of colonization frequency. Representatives of each morphotype was sequenced and subjected to further molecular characterization. The results revealed that morphotypes were belonged to the phylum of Ascomycota, distributed over two classes (Sordariomycetes (68.59%) and Dothideomycetes (31.41%)), 6 orders and 19 genera. Based on compensatory base changes (CBC) analysis and absolute identity of ITS2 structure, 21, 20 and 23 species were recognized from A. elaeagnoidea, F. inermis, and P. serratifolia respectively. Diversity indices were higher in A. elaeagnoidea, despite it accounted for a modest 16.8% of total isolates recorded in this study. The genus Colletotrichum was predominant in A. elaeagnoidea (39%) and P. serratifolia (48%). Similarly, Diaporthe (43%) was dominant in F. inermis. Several host-specific species were also observed. This study concludes that these plants host diverse species of Ascomycota. To the best of our knowledge, this is the first detailed report on FEF diversity from these plants. Also, the inclusion of ITS2 secondary structure information along with the sequence provides a further dimension to resolve the inherent problems in identification of fungal species.


Assuntos
Aglaia/genética , Ascomicetos/fisiologia , DNA Espaçador Ribossômico/genética , Endófitos/fisiologia , Flacourtia/genética , Lamiaceae/genética , Aglaia/microbiologia , Ascomicetos/genética , Biodiversidade , DNA Fúngico/genética , Flacourtia/microbiologia , Lamiaceae/microbiologia , Filogenia , Especificidade da Espécie
6.
Microbiome ; 6(1): 79, 2018 04 26.
Artigo em Inglês | MEDLINE | ID: mdl-29695286

RESUMO

BACKGROUND: Plants are colonized by a great diversity of microorganisms which form a microbiota and perform additional functions for their host. This microbiota can thus be considered a toolbox enabling plants to buffer local environmental changes, with a positive influence on plant fitness. In this context, the transmission of the microbiota to the progeny represent a way to ensure the presence of beneficial symbionts within the habitat. Examples of such transmission have been mainly described for seed transmission and concern a few pathogenic microorganisms. We investigated the transmission of symbiotic partners to plant progeny within clonal plant network. METHODS: We used the clonal plant Glechoma hederacea as plant model and forced newly emitted clonal progeny to root in separated pots while controlling the presence of microorganisms. We used an amplicon sequencing approach of 16S and 18S rRNA targeting bacteria/archaea and fungi respectively to describe the root microbiota of mother and clonal-plant offspring. RESULTS: We demonstrated the vertical transmission of a significant proportion of the mother plants' symbiotic bacteria and fungi to the daughters. Interestingly, archaea were not transmitted to the daughter plants. Transmitted communities had lower richness, suggesting a filtration during transmission. We found that the transmitted pool of microorganisms was similar among daughters, constituting the heritability of a specific cohort of microorganisms, opening a new understanding of the plant holobiont. We also found significant effects of distance to the mother plant and of growth time on the richness of the microbiota transmitted. CONCLUSIONS: In this clonal plant, microorganisms are transmitted between individuals through connections, thereby ensuring the availability of microbe partners for the newborn plants as well as the dispersion between hosts for the microorganisms. This previously undescribed ecological process allows the dispersal of microorganisms in space and across plant generations. As the vast majority of plants are clonal, this process might be therefore a strong driver of ecosystem functioning and assembly of plant and microorganism communities in a wide range of ecosystems.


Assuntos
Archaea/classificação , Bactérias/classificação , Fungos/classificação , Lamiaceae/microbiologia , Microbiota/genética , Archaea/genética , Archaea/isolamento & purificação , Bactérias/genética , Bactérias/isolamento & purificação , Fungos/genética , Fungos/isolamento & purificação , RNA Ribossômico 16S/genética , RNA Ribossômico 18S/genética , Microbiologia do Solo , Simbiose
7.
Environ Entomol ; 47(3): 609-622, 2018 06 06.
Artigo em Inglês | MEDLINE | ID: mdl-29534165

RESUMO

A new gall midge, Asphondylia nepetae sp. n. Viggiani (Diptera: Cecidomyiidae), causing flower gall on Clinopodium nepeta (L.) Kuntze (Lamiaceae), is described from Europe. The morphological characteristics of adult, larvae, and pupa are described and illustrated. Molecular approach (by sequencing 28S-D2, ITS2, and COI) confirmed that A. nepetae is a distinct species. The development of the gall is always associated with the presence of the fungus Botryosphaeria dothidea (Moug.: Fr.) Ces. and De Not. (Botryosphaeriales: Botryosphaeriaceae). The new species can complete several generations per year, on the flowers of the same host plant and its adults emerge from late spring to autumn. Pupae overwinter inside peculiar flower galls in a state of quiescence. The impact of the pest is highly variable with a percentage of flowers infested that ranged between 3 and 57.5% in the sampled years. Insect mortality was, at least in part, due to parasitoids that attack the young stages of the midge. Among them, the dominant species was Sigmophora brevicornis (Panzer) (Chalcidoidea: Eulophidae).


Assuntos
Ascomicetos/fisiologia , Herbivoria , Lamiaceae/fisiologia , Nematóceros/classificação , Tumores de Planta , Animais , Complexo IV da Cadeia de Transporte de Elétrons/análise , Cadeia Alimentar , Himenópteros/fisiologia , Proteínas de Insetos/análise , Itália , Lamiaceae/microbiologia , Larva/classificação , Larva/crescimento & desenvolvimento , Larva/parasitologia , Larva/fisiologia , Nematóceros/crescimento & desenvolvimento , Nematóceros/parasitologia , Nematóceros/fisiologia , Filogenia , Pupa/classificação , Pupa/crescimento & desenvolvimento , Pupa/parasitologia , Pupa/fisiologia
8.
Sci Rep ; 7(1): 3745, 2017 06 16.
Artigo em Inglês | MEDLINE | ID: mdl-28623306

RESUMO

Fungal endophytes were isolated from leaf, bark and stem of Tectona grandis Linn.f. sampled at four geographical locations in winter, summer and monsoon seasons. The recovered 5089 isolates were assigned to 45 distinct morphotypes based on morphology. The sequences of the internal transcribed spacers (ITS) of the nrDNA of some morphotypes were identical, but morphological differences were strong enough to consider these morphotypes as separate species. Forty-three morphotypes were assigned to ascomycotina and two to basidiomycotina. Ascomycotina was the predominating group with 99.7% of total isolates followed by basidiomycotina with only 0.3% of total isolates. Diaporthe (Phomopsis) species dominated the communities independently on tissue type, location or season. More than 60% of the examined tissue pieces were colonized by members of this species complex. While these endophytes are ubiquitous others were tissue or location specific. Tissue type had the strongest effect on the species evenness of the endophytic assemblage followed by geographical location and season. However, Shannon-Wiener index (H') significantly (p ≤ 0.001) varied with all three factors i.e. season, location and tissue type. Leaves supported the highest diversity across all the seasons and locations. In conclusion, all the three factors together determined the structure of endophytic mycobiota assemblage of T. grandis.


Assuntos
Ascomicetos , Basidiomycota , Lamiaceae/microbiologia , Micobioma/fisiologia , Estações do Ano , Ascomicetos/isolamento & purificação , Ascomicetos/fisiologia , Basidiomycota/isolamento & purificação , Basidiomycota/fisiologia
9.
Sci Total Environ ; 599-600: 1462-1468, 2017 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-28531954

RESUMO

Closely associated microbes have been shown to drive local adaptation of plants. However, few studies provide direct evidence, disclosing the role of arbuscular mycorrhiza fungi (AMF) in their rapid adaptation of plants toward heavy metal tolerance. Elsholtzia splendens is a Cu-tolerant plant that was used as a model plant to study seed morphological traits as well as traits related to seed germination and seedling growth. This was achieved after acclimation for two generations with 1000mg/kg CuSO4 in either absence or presence of AMF. In the absence of AMF, acclimation to Cu for two generations significantly decreased surface area, perimeter length, and perimeter width of E. splendens seeds, as well as seedling survival rate and fresh weight of the radicle of seedlings. However, in the presence of AMF, both the germination rate and the germination index of E. splendens seeds as well as the fresh weights of hypocotyl and radicle significantly increased. These results revealed that after Cu acclimation treatment, seeds and seedlings that had been inoculated with AMF outperformed those without AMF inoculation under Cu addition, indicating that AMF can facilitate rapid adaptation of E. splendens to Cu stress. In addition, two generations of Cu acclimation under AMF absence significantly increased radicle length, while amplitude increased under AMF presence, indicating that the direct adaptive plasticity response of radicle length to Cu stress helps with the Cu stress adaptation of E. splendens.


Assuntos
Adaptação Fisiológica , Cobre/farmacologia , Lamiaceae/fisiologia , Micorrizas/fisiologia , Raízes de Plantas/microbiologia , Lamiaceae/microbiologia , Poluentes do Solo/farmacologia , Estresse Fisiológico
10.
J Microbiol Biotechnol ; 27(6): 1065-1070, 2017 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-28297749

RESUMO

This study aimed to examine the anti-candidal efficacy of a novel ketone derivative isolated from Diaporthe sp. ED2, an endophytic fungus residing in medicinal herb Orthosiphon stamieus Benth. The ethyl acetate extract of the fungal culture was separated by open column and reverse phase high-performance liquid chromatography (HPLC). The eluent at retention time 5.64 min in the HPLC system was the only compound that exhibited anti-candidal activity on Kirby-Bauer assay. The structure of the compound was also elucidated by nuclear magnetic resonance and spectroscopy techniques. The purified anti-candidal compound was obtainedas a colorless solid and characterized as 3-hydroxy-5-methoxyhex-5-ene-2,4-dione. On broth microdilution assay, the compound also exhibited fungicidal activity on a clinical strain of Candida albicans at a minimal inhibitory concentration of 3.1 µg/ml. The killing kinetic analysis also revealed that the compound was fungicidal against C. albicans in a concentration- and time-dependent manner. The compound was heat-stable up to 70°C, but its anti-candidal activity was affected at pH 2.


Assuntos
Antifúngicos/farmacologia , Ascomicetos/química , Candida/efeitos dos fármacos , Endófitos/química , Hexanonas/farmacologia , Cetonas/metabolismo , Cetonas/farmacologia , Antifúngicos/química , Antifúngicos/metabolismo , Ascomicetos/metabolismo , Candida albicans/efeitos dos fármacos , Candidíase/tratamento farmacológico , Candidíase/microbiologia , Cromatografia Líquida de Alta Pressão , Endófitos/metabolismo , Hexanonas/química , Hexanonas/isolamento & purificação , Hexanonas/metabolismo , Concentração de Íons de Hidrogênio , Cetonas/química , Cetonas/isolamento & purificação , Lamiaceae/microbiologia , Testes de Sensibilidade Microbiana , Temperatura
11.
Sci Rep ; 6: 37852, 2016 11 25.
Artigo em Inglês | MEDLINE | ID: mdl-27886270

RESUMO

The effect of AM fungi spatial distribution on individual plant development may determine the dynamics of the whole plant community. We investigated whether clonal plants display, like for other resources, a foraging or a specialization response, to adapt to the distribution of AM fungi. Two separate experiments were done to investigate the response of Glechoma hederacea to a heterogeneous distribution of a mixture of 3 AM fungi species, and the effects of each species on colonization and allocation traits. No specialization and a limited foraging response to the heterogeneous distribution of AM fungi was observed. An effect of the AM fungal species on plant mass allocation and ramet production, but not on spacer length, was detected. Two possible explanations are proposed: (i) the plant's responses are buffered by differences in individual effects of the fungal species or their root colonization intensity. (ii) the initial heterogeneous distribution of AM fungi is perceived as homogeneous by the plant either by reduced physiological integration or due to the transfer of AM fungi propagules through the stolons. Microscopic and DNA sequencing analyses provided evidence of this transfer, thus demonstrating the role of stolons as dispersal vectors of AM fungi within the plant clonal network.


Assuntos
Lamiaceae/crescimento & desenvolvimento , Micorrizas/fisiologia , Análise de Sequência de DNA/métodos , DNA Fúngico/genética , DNA de Plantas/genética , Genótipo , Lamiaceae/genética , Lamiaceae/microbiologia , Filogenia , Raízes de Plantas/genética , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/microbiologia
12.
Sci Rep ; 6: 36302, 2016 10 26.
Artigo em Inglês | MEDLINE | ID: mdl-27782202

RESUMO

Bacterial communities of rhizospheric soils play an important role in the tolerance and uptake of metal-tolerant/hyperaccumulating plants to metals, e.g. the Cu-tolerant Elsholtzia splendens native to China. In this work, pyrosequencing of the bacterial 16S rRNA gene was firstly applied to investigate the rhizospheric bacterial community of E. splendens grown at Cu contaminated sites. The 47 phyla including 11 dominant phyla (>1%) in E. splendens rhizosphere were presented. The effects of Cu and other environmental factors (total organic carbon, total nitrogen and pH) on the rhizospheric bacterial community were studied comprehensively. The phyla abundances were affected by the environmental factors to different extent, and we found pH, instead of Cu concentration, influenced UniFrac distance significantly and was identified as the most important environmental factor affecting bacterial community. In addition, the influence of environmental factors on gene profiles was explored according to the predicted metagenomes obtained by PICRUSt (phylogenetic investigation of communities by reconstruction of unobserved states). Our study illustrates a view about Cu-tolerant E. splendens rhizospheric bacterial communities (composition, diversity and gene profiles) and their influencing factors, giving a hand for the understanding on bacterial community is formed and affected in rhizosphere.


Assuntos
Bactérias/classificação , Cobre/metabolismo , Lamiaceae/crescimento & desenvolvimento , Solo/química , Bactérias/genética , Bactérias/isolamento & purificação , Carbono/análise , DNA Bacteriano/genética , DNA Ribossômico/genética , Concentração de Íons de Hidrogênio , Lamiaceae/microbiologia , Nitrogênio/análise , Filogenia , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/microbiologia , RNA Ribossômico 16S/genética , Rizosfera , Microbiologia do Solo
13.
Fitoterapia ; 110: 77-82, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26877100

RESUMO

Chemical investigation of the liquid culture of the endophytic fungus Bipolaris sorokiniana A606, which was isolated from the medicinal plant Pogostemon cablin resulted in the isolation of four new cytotoxic compounds, named isocochlioquinones D-E (1-2) and cochlioquinones G-H (3-4), along with five known cochlioquinone analogues (5-9). Their structures were determined on the basis of extensive spectroscopic analysis. Isocochlioquinone D (1) possessed a rare benzothiazin-3-one moiety and cochlioquinone G (3) was the first example of cochlioquinones bearing an indole-4,7-dione fragment. All of the isolates (1-9) were evaluated for their cytotoxic activities against MCF-7, NCI-H460, SF-268 and HepG-2 tumor cell lines by the sulforhodamine B (SRB) assay. Compounds 4 and 6-9, featuring a cochlioquinone core, exhibited potent cytotoxicities in vitro against the four tumor cell lines, and a preliminary structure-activity relationship of these compounds was also discussed.


Assuntos
Antineoplásicos/química , Ascomicetos/química , Benzoquinonas/química , Indolquinonas/química , Lamiaceae/microbiologia , Antineoplásicos/isolamento & purificação , Benzoquinonas/isolamento & purificação , Linhagem Celular Tumoral/efeitos dos fármacos , Humanos , Indolquinonas/isolamento & purificação , Estrutura Molecular , Relação Estrutura-Atividade
14.
Int J Phytoremediation ; 18(5): 494-501, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26587767

RESUMO

The effects of inoculation with two metal-resistant and plant growth-promoting endophytic bacteria (Burkholderia sp. GL12 and Bacillus megaterium JL35) were evaluated on the plant growth and Cu uptake in their host Elsholtzia splendens and non-host Brassica napus plants grown in natural Cu-contaminated soil. The two strains showed a high level of ACC deaminase activities. In pot experiments, inoculation with strain GL12 significantly increased root and above-ground tissue dry weights of both plants, consequently increasing the total Cu uptake of E. splendens and Brassica napus by 132% and 48.2% respectively. Inoculation with strain JL35 was found to significantly increase not only the biomass of B. napus, consequently increasing the total Cu uptake of B. napus by 31.3%, but Cu concentration of E. splendens for above-ground tissues by 318% and roots by 69.7%, consequently increasing the total Cu uptake of E. splendens by 223%. The two strains could colonize the rhizosphere soils and root interiors of both plants. Notably, strain JL35 could colonize the shoot tissues and significantly increase the translocation factors and bioaccumulation factors of E. splendens. These results suggested that Burkholderia sp. GL12 and B. megaterium JL35 were valuable bacterial resource which had the potential in improving the efficiency of Cu phytoextraction by E. splendens and B. napus in a natural Cu-contaminated soil.


Assuntos
Bacillus megaterium/fisiologia , Brassica napus/metabolismo , Burkholderia/fisiologia , Cobre/metabolismo , Lamiaceae/metabolismo , Desenvolvimento Vegetal , Poluentes do Solo/metabolismo , Biodegradação Ambiental , Brassica napus/crescimento & desenvolvimento , Brassica napus/microbiologia , Carbono-Carbono Liases/metabolismo , Lamiaceae/crescimento & desenvolvimento , Lamiaceae/microbiologia
15.
PLoS One ; 10(12): e0145793, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26709921

RESUMO

Plant responses to heavy metal contamination may depend on the presence of arbuscular mycorrhizal fungi (AMF). Elsholtzia splendens is an indicator species for the presence of copper (Cu) mines because both its flowering phenology and reproduction are tolerant to heavy metals. To test whether effects of Cu on the flowering phenology and reproduction of E. splendens depend on the presence of AMF, we conducted a factorial experiment with two Cu treatments (with or without Cu addition) crossed with two AMF treatments (with or without AMF inoculation). Without AMF, Cu addition significantly delayed the onset dates, ending dates and peak dates of flowering and decreased flowering duration. However, AMF inoculation reversed the effects of Cu stress, with recovered flowering onset and ending dates and increased the flowering duration. Cu addition significantly decreased inflorescence width and number, inflorescence biomass, vegetative biomass and total seed number, but significantly increased 1000-seed weight. AMF inoculation significantly increased vegetative biomass. Two-way ANOVA results showed that the interactive effects between Cu addition and AMF inoculation were significant on the inflorescence number, vegetative biomass and total seed number. These results indicate that AMF can alleviate the Cu stress on the flowering phenology and reproduction of E. splendens.


Assuntos
Cobre/toxicidade , Lamiaceae/efeitos dos fármacos , Lamiaceae/microbiologia , Micorrizas/fisiologia , Poluentes do Solo/toxicidade , Adaptação Fisiológica , Biomassa , Cobre/farmacocinética , Flores/efeitos dos fármacos , Flores/microbiologia , Lamiaceae/fisiologia , Raízes de Plantas/efeitos dos fármacos , Raízes de Plantas/microbiologia , Raízes de Plantas/ultraestrutura , Reprodução/efeitos dos fármacos , Poluentes do Solo/farmacocinética , Estresse Fisiológico
16.
Fungal Biol ; 119(7): 615-30, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-26058537

RESUMO

Little is known about the biology of the monotypic genus Cornuvesica (Microascales), apart from that isolates are notoriously difficult to culture on artificial media. A recent collection of material resembling this genus from freshly made wounds on Gmelina arborea in Indonesia, provided an opportunity to reconsider all available material of Cornuvesica falcata, type species of the genus. In addition to morphological comparisons, multigene phylogenetic analyses were made using sequences of the SSU, ITS, LSU and TEF-1α genes. Our results showed that the holotype of Cor. falcata from pine in Canada differed from all other material previously considered to represent this species and also from the new Indonesian collections. The collections considered represented three additional species that we describe here as new. Three New Zealand isolates and an isolate from UK were respectively described as Cor. acuminata and Cor. crypta, while the Indonesian isolates were described as Cor. magnispora. Phylogenies based on the SSU and LSU data sets showed that Cornuvesica spp. do not belong in the Ceratocystidaceae as previously suggested, but represent a distinct lineage in the Microascales that has yet to be named. Results showed that culture filtrates from other fungi or ferric chloride markedly stimulated the growth of Cor. magnispora.


Assuntos
Lamiaceae/microbiologia , Ophiostomatales/isolamento & purificação , DNA Fúngico/genética , DNA Ribossômico/genética , Dados de Sequência Molecular , Ophiostomatales/classificação , Ophiostomatales/genética , Ophiostomatales/crescimento & desenvolvimento , Filogenia , Casca de Planta/microbiologia
17.
Environ Sci Pollut Res Int ; 22(7): 5070-81, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25510610

RESUMO

A hydroponics trial was employed to study the effects of Pseudomonas putida CZ1 (CZ1), a heavy-metal-resistant bacterial strain isolated from the rhizosphere of Elsholtzia splendens (E. splendens), on the uptake and translocation of copper (Cu) in E. splendens. Significant promotion of plant growth coupled with the obvious plant-growth-promoting (PGP) characters of the bacteria suggested that CZ1 would be a plant-growth-promoting rhizobacterium (PGPR) to E. splendens under Cu stress condition. The results of inductively coupled plasma optical emission spectrometry (ICP-OES) showed that CZ1 increased the concentration of Cu in the shoots (up to 211.6% compared to non-inoculation treatment) and translocation factor (TF) (from 0.56 to 1.83%) of those exposed to Cu. The distribution of Cu in root cross section measured by synchrotron-based X-ray fluorescence microscopy (SRXRF) indicated that CZ1 promoted the transport of Cu from cortex to xylem in roots, which contributed to the accumulation of Cu in shoots. Furthermore, CZ1 improved the uptake of nutrient elements by plants to oppose to the toxicity of Cu. In summary, P. putida CZ1 acted as a PGPR in resistance to Cu and promoted the accumulation and translocation of Cu from root to shoot by element redistribution in plant root; hence, CZ1 is a promising assistance to phytoremediation.


Assuntos
Cobre/isolamento & purificação , Lamiaceae/química , Pseudomonas putida/efeitos dos fármacos , Microbiologia do Solo , Poluentes do Solo/isolamento & purificação , Biodegradação Ambiental , Cobre/toxicidade , Farmacorresistência Bacteriana , Hidroponia , Lamiaceae/efeitos dos fármacos , Lamiaceae/crescimento & desenvolvimento , Lamiaceae/microbiologia , Metais Pesados/isolamento & purificação , Metais Pesados/toxicidade , Microscopia de Fluorescência , Desenvolvimento Vegetal , Raízes de Plantas/química , Raízes de Plantas/efeitos dos fármacos , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/microbiologia , Caules de Planta/química , Caules de Planta/efeitos dos fármacos , Caules de Planta/crescimento & desenvolvimento , Caules de Planta/microbiologia , Pseudomonas putida/crescimento & desenvolvimento , Rizosfera , Poluentes do Solo/toxicidade
18.
PLoS One ; 9(11): e112591, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25397675

RESUMO

Aquilaria crassna Pierre ex Lec. and Tectona grandis Linn.f. are sources of resin-suffused agarwood and teak timber, respectively. This study investigated arbuscular mycorrhizal (AM) fungus community structure in roots and rhizosphere soils of A. crassna and T. grandis from plantations in Thailand to understand whether AM fungal communities present in roots and rhizosphere soils vary with host plant species and study sites. Terminal restriction fragment length polymorphism complemented with clone libraries revealed that AM fungal community composition in A. crassna and T. grandis were similar. A total of 38 distinct terminal restriction fragments (TRFs) were found, 31 of which were shared between A. crassna and T. grandis. AM fungal communities in T. grandis samples from different sites were similar, as were those in A. crassna. The estimated average minimum numbers of AM fungal taxa per sample in roots and soils of T. grandis were at least 1.89 vs. 2.55, respectively, and those of A. crassna were 2.85 vs. 2.33 respectively. The TRFs were attributed to Claroideoglomeraceae, Diversisporaceae, Gigasporaceae and Glomeraceae. The Glomeraceae were found to be common in all study sites. Specific AM taxa in roots and soils of T. grandis and A. crassna were not affected by host plant species and sample source (root vs. soil) but affected by collecting site. Future inoculum production and utilization efforts can be directed toward the identified symbiotic associates of these valuable tree species to enhance reforestation efforts.


Assuntos
Lamiaceae/microbiologia , Microbiota/genética , Micorrizas/genética , Raízes de Plantas/microbiologia , Microbiologia do Solo , Thymelaeaceae/microbiologia , Análise de Variância , Sequência de Bases , Análise por Conglomerados , Modelos Genéticos , Dados de Sequência Molecular , Filogenia , Polimorfismo de Fragmento de Restrição , Análise de Sequência de DNA , Especificidade da Espécie , Tailândia
19.
PLoS One ; 9(11): e112533, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25427154

RESUMO

Paulownia witches' broom (PaWB) caused by phytoplasma might result in devastating damage to the growth and wood production of Paulownia. To study the effect of phytoplasma on DNA sequence and to discover the genes related to PaWB occurrence, DNA polymorphisms and DNA methylation levels and patterns in PaWB seedlings, the ones treated with various concentration of methyl methane sulfonate (MMS) and healthy seedlings were investigated with amplified fragment length polymorphism (AFLP) and methylation-sensitive amplification polymorphism (MSAP). Our results indicated that PaWB seedlings recovered a normal morphology, similar to healthy seedlings, after treatment with more than 20 mg · L-1 MMS; Phytoplasma infection did not change the Paulownia genomic DNA sequence at AFLP level, but changed the global DNA methylation levels and patterns; Genes related to PaWB were discovered through MSAP and validated using quantitative real-time PCR (qRT-PCR). These results implied that changes of DNA methylation levels and patterns were closely related to the morphological changes of seedlings infected with phytoplasmas.


Assuntos
DNA de Plantas/genética , Regulação da Expressão Gênica de Plantas , Interações Hospedeiro-Patógeno/genética , Lamiaceae/genética , Proteínas de Plantas/genética , Plântula/genética , Análise do Polimorfismo de Comprimento de Fragmentos Amplificados , Metilação de DNA , DNA de Plantas/metabolismo , Epigênese Genética , Lamiaceae/anatomia & histologia , Lamiaceae/efeitos dos fármacos , Lamiaceae/microbiologia , Metanossulfonato de Metila/farmacologia , Phytoplasma/efeitos dos fármacos , Phytoplasma/patogenicidade , Phytoplasma/fisiologia , Doenças das Plantas/genética , Doenças das Plantas/microbiologia , Proteínas de Plantas/metabolismo , Reação em Cadeia da Polimerase em Tempo Real , Plântula/anatomia & histologia , Plântula/efeitos dos fármacos , Plântula/microbiologia , Madeira/efeitos dos fármacos , Madeira/microbiologia
20.
PLoS One ; 9(9): e108259, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25243590

RESUMO

The effects of rhizodeposition on soil C and N availabilities lead to substantial changes of microbial community composition and processes in the rhizosphere of plants. Under heterogeneous light, photosynthates can be translocated or shared between exposed and shaded ramets by clonal integration. Clonal integration may enhance the rhizodeposition of the shaded ramets, which further influences nutrient recycling in their rhizosphere. To test the hypothesis, we conducted a pot experiment by the stoloniferous herb Glechoma longituba subjected to heterogeneous light. Microbial biomass and community composition in the rhizosphere of shaded offspring ramets, assessed by phospholipid fatty acids (PLFAs) analysis, were markedly altered by clonal integration. Clonal integration positively affected C, N availabilities, invertase and urease activities, N mineralization (Nmin) and nitrification rates (Nnitri) in the rhizosphere of shaded offspring ramets. However, an opposite pattern was also observed in phenoloxidase (POXase) and peroxidase (PODase) activities. Our results demonstrated that clonal integration facilitated N assimilation and uptake in the rhizosphere of shaded offspring ramets. The experiment provides insights into the mechanism of nutrient recycling mediated by clonal integration.


Assuntos
Lamiaceae/microbiologia , Rizosfera , Nitrificação
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