Comparisons of diazotrophic communities in native and agricultural desert ecosystems reveal plants as important drivers in diversity

Martina Köberl, Armin Erlacher, Elshahat M. Ramadan, Tarek F. El-Arabi, Henry Müller, Anastasia Bragina, Gabriele Berg

Research output: Contribution to journalArticle

Abstract

Diazotrophs provide the only biological source of fixed atmospheric nitrogen in the biosphere. Although they are the key player for plant-available nitrogen, less is known about their diversity and potential importance in arid ecosystems. We investigated the nitrogenase gene diversity in native and agricultural desert soil as well as within root-associated microbiota of medicinal plants grown in Egypt through the combination of nifH-specific qPCR, fingerprints, amplicon pyrosequencing and fluorescence in situ hybridization–confocal laser scanning microscopy. Although the diazotrophic microbiota were characterized by generally high abundances and diversity, statistically significant differences were found between both soils, the different microhabitats, and between the investigated plants (Matricaria chamomilla L., Calendula officinalis L. and Solanum distichum Schumach. and Thonn.). We observed a considerable …
Original languageEnglish
Article numberfiv166
JournalFEMS Microbiology Ecology
Volume92
Issue number2
Early online date23 Dec 2015
DOIs
Publication statusPublished - Feb 2016

Fields of Expertise

  • Sonstiges

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