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Xerotolerant foliar endophytic fungi of Populus euphratica from the Tarim River basin,Central China are conspecific to endophytic ITS phylotypes of Populus tremula from temperate Europe

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Fungal Diversity 2012年第3期54卷 133-142页

作者： Martin Unterseher Anne Petzold Martin Schnittler Institute of Botany and Landscape Ecology Department of Systematic BotanyErnst-Moritz-Arndt UniversityGrimmer Str.8817487 GreifswaldGermany

Fungal research on non-lichenized taxa in xeric and other unusual habitats for fungi is comparatively scarce but constantly reveal an enormous ecological and functional adaptiveness of these organisms to *** holds true in the topmost forest canopies as well as in marine,arctic,antarctic or desert *** the present study dried leaves of Populus euphratica from a continental desert area in Central China were investigated for endophytic fungi 6 weeks after sampling by cultivation of small leaf ***-five species,many of them well-known from extreme environments,were delimitated from as few as 58 isolates by a combined analysis of morphotypes,micromorphology and ITS ***-analyses revealed pronounced conspecificity to endophytes from Populus tremula leaves,but significant differences to foliar endophytic assemblages in Pinus monticola and Fagus *** deduced high similarity of endophytic communities on both Populus species compared with that on Pinus and Fagus suggests that many fungal phyllosphere species show a well-pronounced host preference,at least for their endophytic *** addition,it demonstrates that leaving leaves as a microhabitat might provide similar conditions such as constantly high relative humidity,regardless of the surrounding climatic *** evolution of extremotolerance might be of particular importance for retaining competitiveness of foliar endophytes in deciduous host trees after loss of pathogenicity.

关键词： Frost-drought tolerance Extremophile Alternaria Cladosporium Penicillium evolution of endophytism

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