Ecology of cultivable yeasts in pristine forests in northern Patagonia (Argentina) influenced by different environmental factors

被引：17

作者：

Cecilia Mestre, Maria ^{[1
]}

Fontenla, Sonia ^{[1
]}

Rosa, Carlos A. ^{[2
]}

机构：

[1] Univ Nacl Comahue, CONICET, UNCO,INIBIOMA, Lab Microbiol Aplicada & Biotecnol,CRUB, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Microbiol, BR-31270901 Belo Horizonte, MG, Brazil

来源：

CANADIAN JOURNAL OF MICROBIOLOGY | 2014年 / 60卷 / 06期

关键词：

soil ecology; yeast diversity; community yeast structure; Patagonian forests soil; SOIL YEASTS; NOTHOFAGUS; DIVERSITY; IDENTIFICATION; FUNGI; NOV;

D O I：

10.1139/cjm-2013-0897

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Environmental factors influencing the occurrence and community structure of soil yeasts in forests are not well studied. There are few studies dedicated to Southern Hemisphere soil yeasts populations and even fewer focused on temperate forests influenced by volcanic activity. The present work aimed to study the ecology of soil yeast communities from pristine forests influenced by different environmental factors (precipitation, physicochemical properties of soil, tree species, soil region, and season). The survey was performed in 4 northern Patagonian forests: 2 dominated by Nothofagus pumilio and 2 by Nothofagus antarctica. Yeast communities were described with ecological indices and species accumulation curves, and their association with environmental characteristics was assessed using multivariate analysis. Each forest site showed a particular arrangement of species as a result of environmental characteristics, such as dominant plant species, nutrient availability, and climatic characteristics. Cryptococcus podzolicus was most frequently isolated in nutrient-rich soils, Trichosporon porosum dominated cold mountain forests with low nutrient and water availability in soil, and capsulated yeasts such as Cryptococcus phenolicus dominated forest sites with low precipitation. The present work suggests that environmental factors affecting yeast communities may not be the current soil characteristics but the result of complex interactions of factors including natural disturbances like volcanic activity.

引用

页码：371 / 382

页数：12

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