Drought and host selection influence bacterial community dynamics in the grass root microbiome.
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TLDR
It is shown that there is a strong correlation between host phylogenetic distance and the microbiome dissimilarity within root tissues, and that drought weakens this correlation by inducing conserved shifts in bacterial community composition.Abstract:
Root endophytes have been shown to have important roles in determining host fitness under periods of drought stress, and yet the effect of drought on the broader root endosphere bacterial community remains largely uncharacterized. In this study, we present phylogenetic profiles of bacterial communities associated with drought-treated root and rhizosphere tissues of 18 species of plants with varying degrees of drought tolerance belonging to the Poaceae family, including important crop plants. Through 16S rRNA gene profiling across two distinct watering regimes and two developmental time points, we demonstrate that there is a strong correlation between host phylogenetic distance and the microbiome dissimilarity within root tissues, and that drought weakens this correlation by inducing conserved shifts in bacterial community composition. We identify a significant enrichment in a wide variety of Actinobacteria during drought within the roots of all hosts, and demonstrate that this enrichment is higher within the root than it is in the surrounding environments. Furthermore, we show that this observed enrichment is the result of an absolute increase in Actinobacterial abundance and that previously hypothesized mechanisms for observed enrichments in Actinobacteria in drought-treated soils are unlikely to fully account for the phenomena observed here within the plant root.read more
Citations
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Assembly and ecological function of the root microbiome across angiosperm plant species.
Connor R. Fitzpatrick,Julia K. Copeland,Pauline W. Wang,David S. Guttman,Peter M. Kotanen,Marc T. J. Johnson +5 more
TL;DR: It is demonstrated that variation among 30 angiosperm species, which have diverged for up to 140 million years, affects root bacterial diversity and composition and the causes of variation in root microbiomes are emphasized.
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Soil microbiomes and climate change
TL;DR: The current state of knowledge about the impacts of climate change on soil microorganisms in different climate-sensitive soil ecosystems, as well as potential ways that soil micro organisms can be harnessed to help mitigate the negative consequences of climatechange are explored.
Journal ArticleDOI
Harnessing rhizosphere microbiomes for drought-resilient crop production
Franciska T. de Vries,Franciska T. de Vries,Robert I. Griffiths,Christopher Knight,O. Nicolitch,Alex Williams +5 more
TL;DR: The need for improved mechanistic understanding of the complex feedbacks between plants and microbes during, and particularly after, drought is highlighted and is central to making crop production more resilient to the authors' future climate.
Journal ArticleDOI
Drought Stress and Root-Associated Bacterial Communities.
TL;DR: A synthesis of observed trends in recent studies is provided and possible directions for future research are discussed that are hoped will provide for more knowledgeable predictions about community responses to future drought events.
Journal ArticleDOI
Drought delays development of the sorghum root microbiome and enriches for monoderm bacteria
Ling Xu,Dan Naylor,Dan Naylor,Zhaobin Dong,Zhaobin Dong,Tuesday Simmons,Tuesday Simmons,Grady Pierroz,Grady Pierroz,Kim K. Hixson,Young-Mo Kim,Erika M. Zink,Kristin Engbrecht,Yi Wang,Yi Wang,Cheng Gao,Stephanie DeGraaf,Mary Madera,Julie A. Sievert,Joy Hollingsworth,Devon Birdseye,Henrik Vibe Scheller,Henrik Vibe Scheller,Henrik Vibe Scheller,Robert B. Hutmacher,Jeffery A. Dahlberg,Christer Jansson,John W. Taylor,Peggy G. Lemaux,Devin Coleman-Derr +29 more
TL;DR: It is demonstrated that under drought, roots increase the production of many metabolites, and that monoderms inhabiting the drought-treated rhizosphere exhibit increased activity of transporters connected with some of these same compounds.
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