ABSTRACT
Tropical rainforests and related biomes are found in Asia, Australia, Africa, Central and South America, Mexico, and many Pacific Islands. These biomes encompass less than 20% of Earth's terrestrial area, may contain about 50% of the planet's biodiversity, and are endangered regions vulnerable to deforestation. Tropical rainforests have a great diversity of substrates that can be colonized by yeasts. These unicellular fungi contribute to the recycling of organic matter, may serve as a food source for other organisms, or have ecological interactions that benefit or harm plants, animals, and other fungi. In this review, we summarize the most important studies of yeast biodiversity carried out in these biomes, as well as new data, and discuss the ecology of yeast genera frequently isolated from tropical forests and the potential of these microorganisms as a source of bioinnovation. We show that tropical forest biomes represent a tremendous source of new yeast species. Although many studies, most using culture-dependent methods, have already been carried out in Central America, South America, and Asia, the tropical forest biomes of Africa and Australasia remain an underexplored source of novel yeasts. We hope that this review will encourage new researchers to study yeasts in unexplored tropical forest habitats.
Subject(s)
Forests , Tropical Climate , Animals , Biodiversity , Ecosystem , PlantsABSTRACT
Ten yeast isolates representing four candidate novel species of the genus Teunomyces were obtained from different species of mushrooms and drosophilids collected in an Amazonian Forest biome in Brazil. Sequence analyses of the ITS 5.8S region and the D1/D2 domains of the large subunit rRNA gene showed that four isolates were phylogenetically related to Teunomyces stri, two isolates related to Teunomyces atbi, two isolates related to Teunomyces aglyptinius, and another two isolates related to Teunomyces aglyptinius, Teunomyces barrocoloradensis, Teunomyces gatunensis and Teunomyces stri. The four novel species differ by 3â% or more of sequence divergence in D1/D2 domains from their closest relatives. These species were isolated from basidiocarps of the mushrooms Marasmiellus volvatus, Tricholomopsis aurea, Hydropus sp. and Favolus tenuiculus, or drosophilids feeding on these substrates. The names Teunomyces gombertii f.a., sp. nov. (holotype CBS 16168T; Mycobank MB849065), Teunomyces landelliae f.a., sp. nov. (holotype =CBS 16169T; Mycobank MB 849066), Teunomyces ledahaglerae f.a., sp. nov. (holotype CBS 16170T; Mycobank MB 849067) and Teunomyces paulamoraisiae f.a., sp. nov. (holotype CBS 16120T; Mycobank MB 849068) are proposed for these species.
Subject(s)
Agaricales , Rainforest , Brazil , Phylogeny , Sequence Analysis, DNA , RNA, Ribosomal, 16S/genetics , DNA, Bacterial/genetics , Bacterial Typing Techniques , Base Composition , Fatty Acids/chemistry , EcosystemABSTRACT
Twelve strains of a novel yeast species were isolated from rotting wood, mushrooms and fruit samples in Brazil and French Guiana. Analysis of the sequences of the internal transcribed spacer region and the D1/D2 domains of the large subunit rRNA gene showed that the novel species belongs to the Kurtzmaniella clade. The novel species differed from its closest relative, Candida natalensis, by 12 substitutions in the D1/D2 sequences. The novel species could be distinguished from C. natalensis by its inability to assimilate cellobiose and salicin, and growth at 50â% (w/w) glucose. The name Kurtzmaniella hittingeri f.a., sp. nov. is proposed for the novel species. The type strain of K. hittingeri sp. nov. is CBS 13469T (=UFMG CM-Y272T). The MycoBank number is 827183. We also propose the transfer of Candida fragi, Candida quercitrusa and Candida natalensis to the genus Kurtzmaniella as new combinations.
Subject(s)
Candida/classification , Fruit/microbiology , Phylogeny , Wood/microbiology , Benzyl Alcohols , Brazil , Candida/isolation & purification , Cellobiose , DNA, Fungal/genetics , DNA, Ribosomal Spacer/genetics , French Guiana , Glucosides , Mycological Typing Techniques , Sequence Analysis, DNAABSTRACT
Abstract This list contains information on the Drosophilidae that occur in the Brazilian state of Pará, Amazon biome, and an analysis of the current knowledge of Drosophilidae based on museum material and literature records. This list includes a detailed account of the material deposited in the entomological collections of the Museu Paraense Emílio Goeldi and Museu de Zoologia da Universidade de São Paulo, up to 2015. In total, 122 species of Drosophilidae were registered, including 27 new records for the state of Pará and 22 are new records for the Amazon; for instance, the genera Diathoneura and Rhinoleucophenga, and three new records for Brazil, (Drosophila fasciola, Diathoneura flavolineata and Drosophila neochracea). The state of Pará is the third state in Brazil in terms of numbers of species of Drosophilidae, with 17% locally native species. Despite the high species richness, there is still a lot to be known about the states's Drosophilidae fauna. This study highlights the importance of scientific collections, particularly as an aid to study regional biodiversity.
Resumo As informações reunidas nesta lista referem-se à ocorrência de Drosophilidae no estado do Pará, bioma Amazônia com uma análise do estado de conhecimento do grupo. Este documento contém uma revisão detalhada do material depositado na Coleção Entomológica do Museu Paraense Emílio Goeldi e Museu de Zoologia da Universidade de São Paulo até 2015, bem como a análise de toda a literatura relevante. Um total de 122 espécies de Drosophilidae foi registrado, com 27 novos registros para o estado do Pará e 22 são novas ocorrências para a Amazônia. Entre estes o primeiro registro para os gêneros Diathoneura e Rhinoleucophenga, além de três registros novos para o Brasil (Drosophila fasciola, Diathoneura flavolineata e Drosophila neochracea). O estado do Pará é o terceiro maior estado brasileiro em termos de número de espécies registradas, com 17% das espécies com ocorrência exclusiva no Estado. Ainda assim há grandes lacunas para o conhecimento da fauna dos Drosophilidae do estado. Este estudo destaca a importância das coleções científicas, acima de tudo, como um elemento crucial para compreensão da biodiversidade regional.
