Strong shift in the diazotrophic endophytic bacterial community inhabiting rice (Oryza sativa) plants after flooding

FEMS Microbiology Ecology
Lucía Ferrando, Ana Fernández Scavino

Abstract

Flooding impacts soil microbial communities, but its effect on endophytic communities has rarely been explored. This work addresses the effect of flooding on the abundance and diversity of endophytic diazotrophic communities on rice plants established in a greenhouse experiment. The nifH gene was significantly more abundant in roots after flooding, whereas the nifH gene copy numbers in leaves were unaffected and remained low. The PCA (principal component analysis) of T-RFLP (terminal restriction fragment length polymorphism) profiles indicated that root communities of replicate plots were more similar and diverse after flooding than before flooding. The nifH libraries obtained by cloning and 454 pyrosequencing consistently showed a remarkable shift in the diazotrophic community composition after flooding. Gammaproteobacteria (66-98%), mainly of the genus Stenotrophomonas, prevailed in roots before flooding, whereas Betaproteobacteria was the dominant class (26-34%) after flooding. A wide variety of aerotolerant and anaerobic diazotrophic bacteria (e.g. Dechloromonas, Rhodopseudomonas, Desulfovibrio, Geobacter, Chlorobium, Spirochaeta, Selenomonas and Dehalobacter) with diverse metabolic traits were retrieved from flooded rice r...Continue Reading

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Citations

Dec 6, 2017·The Plant Journal : for Cell and Molecular Biology·Kyaw AungSheng Yang He
Aug 25, 2019·Archives of Microbiology·Pranjali Vishwakarma, Suresh Kumar Dubey
Jan 10, 2018·Frontiers in Microbiology·Hongwei LiuPeer M Schenk
Apr 11, 2019·Frontiers in Plant Science·Takeshi FukaoJulián Mario Peña-Castro
Sep 9, 2020·Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]·Mónica M CollavinoO Mario Aguilar
Jul 10, 2021·Current Microbiology·Jaeho SongJang-Cheon Cho
Dec 4, 2021·Plant Molecular Biology·Showkat Ahmad GanieAlessandra Devoto

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