Authors: Varsik Martirosyan Adrian Unc Gad Miller Tirza Doniger Chaim Wachtel Yosef Steinberger
Publish Date: 2016/07/23
Volume: 72, Issue: 3, Pages: 659-668
Abstract
Microbial function composition and distribution play a fundamental role in ecosystem ecology The interaction between desert plants and their associated microbes is expected to greatly affect their response to changes in this harsh environment Using comparative analyses we studied the impact of three desert shrubs Atriplex halimus A Artemisia herbaalba AHA and Hammada scoparia HS on soil and leafassociated microbial communities DNA extracted from the leaf surface and soil samples collected beneath the shrubs were used to study associated microbial diversity using a sequencing survey of variable regions of bacterial 16S rRNA and fungal ribosomal internal transcribed spacer ITS1 We found that the composition of bacterial and fungal orders is planttypespecific indicating that each plant type provides a suitable and unique microenvironment The different adaptive ecophysiological properties of the three plant species and the differential effect on their associated microbial composition point to the role of adaptation in the shaping of microbial diversity Overall our findings suggest a link between plant ecophysiological adaptation as a “temporary host” and the bioticcommunity parameters in extreme xeric environmentsWe wish to thank Ms Sharon Victor for her helpful comments This study was part of a research program funded by the UNESCO/Japan Young Researchers’ Fellowship Program 2012 UNESCO/Keizo Obuchi Research Fellowships Program awarded to Dr Varsik Martirosyan and which covered her stay in Israel The sponsor played no role in the study design collection analysis data interpretation writing of the paper or the decision to submit it for publication
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