Seasonal droughts during the Miocene drove the evolution of Capparaceae towards Neotropical seasonally dry forests / Las sequías estacionales del Mioceno impulsaron la evolución de Capparaceae hacia los bosques neotropicales estacionalmente secos

Abstract Introduction: Neotropical seasonally dry forest (NSDF) climatic constraints increased endemism, and phylogenetic niche conservatism in species that are restricted to this biome. NSDF have a large number of endemic Capparaceae taxa, but it is unknown if phylogenetic niche conservatism has played a role in this pattern. Objective: We carried out an evolutionary analysis of the climatic niche of neotropical species of Capparaceae to identify whether the climatic constraints of NSDF have played a major role throughout the family's evolutionary history. Methods: Using three chloroplastic (ndhF, matK, rbcL) and one ribosomal (rsp3) DNA sequences, we proposed a date phylogeny to reconstruct the evolutionary climatic niche dynamics of 24 Neotropical species of Capparaceae. We tested the relationship between niche dissimilarity and phylogenetic distance between species using the Mantel test. Likewise, we used a set of phylogenetic comparative methods (PGLS) on the phylogeny of Capparaceae to reconstruct the main evolutionary historic events in their niche. Results: Capparaceae originated in humid regions and subsequently, convergent evolution occurred towards humid and dry forest during the aridification phases of the Middle Miocene (16-11 Mya). However, adaptation towards drought stress was reflected only during the precipitation of the coldest quarter, where we found phylogenetic signal (Pagel λ) for gradual evolution and, therefore, evidence of phylogenetic niche conservatism. We found convergent species-specific adaptations to both drought stress and rainfall during the Miocene, suggesting a non-phylogenetic structure in most climatic variables. Conclusions: Our study shows how the Miocene climate may have influenced the Capparaceae speciation toward driest environments. Further, highlights the complexity of climatic niche dynamics in this family, and therefore more detailed analyses are necessary in order to better understand the NSDF climatic constrictions affected the evolution of Capparaceae.

Resumen Introducción: Las limitaciones climáticas del bosque neotropical estacionalmente seco (NSDF) produjeron endemismo y conservadurismo filogenético del nicho en especies restringidas a este bosque. En las Caparáceas neotropicales se ha encontrado endemismo en los NSDF, pero se desconoce si el conservadurismo de nicho filogenético ha influido en su evolución. Objetivos: Se llevó a cabo un análisis evolutivo del nicho climático de las especies neotropicales de Capparaceae para evaluar si las limitaciones climáticas del bosque neotropical estacionalmente seco (NSDF) han jugado un papel importante a lo largo de la historia evolutiva de la familia. Métodos: Usando tres secuencias de ADN cloroplastico (ndhF, matK, rbcL) y una ribosomal (rsp3) se propuso una filogenia datada para reconstruir la dinámica evolutiva del nicho climático de 24 especies Neotropicales de Capparaceae. Utilizando la prueba de Mantel, se realizaron análisis para establecer si hay diferencia de nicho y la distancia filogenética entre especies. Asimismo, se emplearon un conjunto de métodos comparativos filogenéticos sobre la filogenia de la familia para reconstruir los principales eventos históricos evolutivos en su nicho. Resultados: Capparaceae se originó en regiones húmedas y posteriormente se dio una evolución convergente hacia bosque húmedo y seco durante las fases de aridificación del Mioceno Medio (16-11 Ma). Sin embargo, la adaptación al estrés por sequía se reflejó solo en la precipitación del cuarto más frío del año, donde se evidencio señal filogenética, evolución gradual y, por lo tanto, evidencia de conservadurismo de nicho filogenético. También se hallaron especies con adaptaciones convergentes específicas tanto al estrés por sequía como a las lluvias durante el Mioceno, sugiriendo la carencia de estructura filogenética en la mayoría de las variables climáticas. Conclusiones: Este estudio muestra cómo el clima del Mioceno pudo haber influenciado la especiación de Capparaceae hacia ambientes mas secos. Además, la compleja dinámica del nicho climático en esta familia y, por lo tanto, la necesidad de realizar análisis más detallados para comprender mejor como las constricciones climáticas del NSDF afectaron la evolución de Capparaceae.

Buchholzia coriacea (wonderful kola) seeds induce male reproductive toxicity by suppressing the pituitary-gonadal axis in Wistar rats

The methanolic extract of Buchholzia coriacea seeds (MEBC) has been reported to induce male reproductive toxicity by decreasing sperm parameters and fertility index. To elucidate the possible mechanism(s), the effects of graded doses of MEBC on sex hormones and sperm profile were investigated in this study. The MEBC (e.g., 50, 200, 400, and 600 mg/kg) was administered daily (p.o.) to male Wistar rats for 6 weeks, while a concurrent control group received distilled water (vehicle). Then, the animals were sacrificed under sodium pentobarbital anaesthesia. Weights of organs were recorded, and the sperm profile was determined microscopically. Testosterone, luteinizing hormone (LH), and follicle stimulating hormone (FSH) were assayed from the obtained serum using the ELISA technique. Sperm motility was significantly reduced by MEBC (i.e., 50 and 200 mg/kg), and sperm count reduced in all treated groups in a dose-dependent manner compared with that of the control. Serum testosterone, LH, and FSH decreased in treated rats. A histopathological examination of testes showed a considerable depletion and necrosis of the epithelium of seminiferous tubules. The result suggests that Buchholzia coriacea seeds induce male reproductive toxicity by suppressing the pituitary-gonadal axis.

Germinación de semillas y clave para la identificación de plántulas de seis especies arbóreas nativas de humedales del sureste de México

Seed germination and key to seedling identification for six native tree species of wetlands from Southeast Mexico. Wetland tree species are of importance for economic and restoration purposes. We describe the germination process and seedling morphology of six arboreal native species typical of Southeastern Mexico: Annona glabra, Ceiba pentandra, Pachira aquatica, Haematoxylum campechianum, Coccoloba barbadensis and Crataeva tapia. A total of 300 seeds per species were planted in a mixture of sand, cocoa plant husk and black soil (1: 1: 1), and maintained in a tree nursery with 30% artificial shade, from February to November of 2007. We carried out the morphological characterization, and elaborated a key to seedlings based on: 1) germination type 2) seedling axis and 3) leaf elements. P. aquatica has cryptocotylar hypogeal germination, the others have phanerocotylar epigeal germination. Germination rates were high (>86%), except for C. barbadensis (69%). Rev. Biol. Trop. 58 (2): 717-732. Epub 2010 June 02.

Especies arbóreas de humedales son de importancia económica y para fines de restauración. Nosotros describimos el proceso de germinación y morfología de plántulas de seis especies arbóreas nativas típicas del sureste de México: Annona glabra, Ceiba pentandra, Pachira aquatica, Haematoxylum campechianum, Coccoloba barbadensis y Crataeva tapia. Un total de 300 semillas por especie fueron sembradas en una mezcla de arena, cascarilla de cacao y tierra negra (1: 1: 1), y mantenidas en invernadero a 30% de sombra artificial, de febrero a noviembre de 2007. Se realizó la caracterización morfológica, y elaboró una clave de plántulas con base en: 1) tipo de germinación 2) eje de la plántula y 3) elementos foliares. P. aquatica presenta germinación criptocotilar hipogea, las otras tienen germinación fanerocotilar epigea. Las tasas de germinación fueron altas (>86%), a excepción de C. barbadensis (69%).

Experimental evaluation on lithotriptic property of musa paradisiacal linn. And crataeva nurvala [Buch-Ham] J. Hooker and Thomson A comparative study

The fast development in Science and Technology in this 21 st century has motivated Man to live a sophisticated life leading to Stress related disorders. Tinned and fast foods have replaced the traditional healthy foods, landing up in many ailments and Calculus is one such Giant disease which is a growing menace in this Century, due to many etiological factors like intake of Calcium diets, less water intake, alcoholism, exposure to hot atmosphere, unhealthy diet habits and suppressing of natural urges etc. The phenomenon of lithofication has been explained in all Classical Ayurvedic texts in the name of Ashmari. This disease Ayurvedic texts, there is one variety where both the medicinal and the surgical treatments are advised and agreed upon by all the Acharyas and this entity is the Mutraashmari. The cause and mechanism of their formation is still uncertain. On one handsurprisingly Calculi does not always form when such factors are present and on the other hand Calculi may develop when factors are apparently absent too. In the long run, different varieties of urinary calculi were recognized which in turn resulted in the development of various medical treatments, most of which failed to achieve a favourable response. Urolithiasis constitutes one of the commonest afflictions requiring surgical interventions despite the major advances achieved in conventional modes of treatment. Urinary calculi is estimated to be present in about 5-7 million patients in our country. Urolithiasis is a frequent clinical problem with an incidence of 0.1 to 6% in general population. The sex ratio shows that males are more affected to this particular condition. Despite the overwhelming influence of modern medicine by way of tremendous advances in synthetic drugs and our dependence on them, a large section of the world population still believes on drugs from plant sources because of their effectiveness, easy availability, low cost and less toxic effects

Effect of the methanolic extract of Cleome chelidonii on drug metabolizing enzymes, antioxidant status and chemomodulatory efficacy in mice

The effect of the methanolic extract of Cleome chelidonii [CCME] was examined on the activities of Phase-I and Phase- II drug metabolizing enzymes, antioxidant enzymes, LDH and LPO in the liver of mice. Anticarcinogenic potential studied by using DMBA induced forestomach and TPA promoted skin papillomagenesis model. The study showed that the extract was able to induce the hepatic activity of Phase-II enzyme glutathione S-transferase [P < 0.005]. DTdiaphorase activity was also increased [P < 0.005]. CCME was augmented mainly the Phase II enzyme activity that is associated with detoxification of xenobiotics, while inhibiting the Phase I enzyme activity. There was an induction in antioxidant level that correlates with the significant reduction of LPO and LDH formation. However, the levels of the two enzymes were significantly reduced [P < 0.005] in the forestomach, kidney and lungs of treated animals. CCME have shown significant reduction on antioxidant enzyme response. Reduced glutathione was significantly elevated in liver [P < 0.05] and in extrahepatic organs [P<0.05]. The CCME revealed a chemopreventive response as shown by the significant inhibition of tumor burden [P < 0.05]

effect of soil topography on vegetation and structure [phytosociology] of plant communities

The study aims at analyzing the vegetation patterns and structure [phytosociology] of Dipterygium glaucum Decne.[Capparidaceae] community, directly after the rainy season. This species is a well known medicinal plant with economic potentialities as well as being a rangeland species, especially in the arid and semi-arid belts along Asia and Africa. It was also recorded in Australia [Richincer, 1969]. The instance of Dipterygium glaucum as one of the famous rangeland species makes it in danger. Its paramount importance as a sand dune-forming species encourages its preferential cultivation along the sides of highways as a shielding dust shelter in windy places.The study was undertaken in the Western region of Saudi Arabia at Ash Shumaysi [45 km from Jeddah] along Jeddah-Mecca road. The study area comprised three transects in three different localities [500 m apart], so that the former was nearer to the motor road while the latter was deeper inside the desert. Soil of the study area was of the sandy type. It was evident that the number of the corresponding species was higher along transect [1] and diminished on going deeper in desert. The most sound result was that Dipterygium glaucum had the highest importance value in its communities, followed by Pennisetum purpureum and then by Citrullus colocynthis

Hepatoprotective activity of capparis spinosa root bark against CC1[4] induced hepatic damage in mice

Many hepatoprotective herbal preparations have been recommended in alternative systems of medicine for the treatment of hepatic disorders. No systematic study has been done on protective efficacy of Capparis spinosa [Capparidaceae] to treat hepaticjdiseases. Protective action of C. spinosa ethanolic root bark extract was evaluated by this study in an animal model of hepatotoxicity induced by carbon tetrachloride. Healthy male mice [30-35 g body weight, 6-8 weeks old] were divided into 7 groups. Group 1 was normal control group; Group 2, the hepatotoxic group was given CCL[4]; Group 3 was administered olive oil [vehicle]; Groups 4-6 received different doses of ethanolic root bark extract [100. 200 and 400 mg/kg] with CCL[4]; Group 7 was administered overdose of extract [800 mg/kg]. The parameters studied were alanine transaminase, aspartate transaminase activities and duration of sleep. The hepatoprotective activity was also supported by histopathological studies of liver tissue. Results of the biochemical studies of blood samples of CCL[4] treated animals showed significant increase in the levels of serum enzyme activities reflecting the liver injury caused by CCL[4]. Whereas blood samples from the animals treated with ethanolic root bark extracts showed significant decrease in the levels of serum markers indicating the protection of hepatic cells. The results revealed that ethanolic root bark extract of C. spinosa could afford significant dose-dependent protection against CCL[4] induced hepatocellular injury

Chemical study on Crateva advansonnii DC (Capparaceae)

Crateva advansonnii DC.-Capparaceae is a medicinal plant which has been used as an antidote for snakebite in Tay Ninh province and in Cambodia. The chemical study on the bark of this plant led to the isolation as a triperpen with structure was unambigously determined as epi-lupeol by UV, IR and NMR spectral data