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Circadian rhythms in the plant host influence rhythmicity of rhizosphere microbiota
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Newman, Amy, Picot, Emma, Davies, Sian, Hilton, Sally, Carré, Isabelle A. and Bending, Gary D. (2022) Circadian rhythms in the plant host influence rhythmicity of rhizosphere microbiota. BMC Biology, 20 (1). 235. doi:10.1186/s12915-022-01430-z ISSN 1741-7007.
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Official URL: http://dx.doi.org/10.1186/s12915-022-01430-z
Abstract
Background
Recent studies demonstrated that microbiota inhabiting the plant rhizosphere exhibit diel changes in abundance. To investigate the impact of plant circadian rhythms on bacterial and fungal rhythms in the rhizosphere, we analysed temporal changes in fungal and bacterial communities in the rhizosphere of Arabidopsis plants overexpressing or lacking function of the circadian clock gene LATE ELONGATED HYPOCOTYL (LHY).
Results
Under diel light–dark cycles, the knock-out mutant lhy-11 and the gain-of-function mutant lhy-ox both exhibited gene expression rhythms with altered timing and amplitude compared to wild-type plants. Distinct sets of bacteria and fungi were found to display rhythmic changes in abundance in the rhizosphere of both of these mutants, suggesting that abnormal patterns of rhythmicity in the plant host caused temporal reprogramming of the rhizosphere microbiome. This was associated with changes in microbial community structure, including changes in the abundance of fungal guilds known to impact on plant health. Under constant environmental conditions, microbial rhythmicity persisted in the rhizosphere of wild-type plants, indicating control by a circadian oscillator. In contrast, loss of rhythmicity in lhy-ox plants was associated with disrupted rhythms for the majority of rhizosphere microbiota.
Conclusions
These results show that aberrant function of the plant circadian clock is associated with altered rhythmicity of rhizosphere bacteria and fungi. In the long term, this leads to changes in composition of the rhizosphere microbiome, with potential consequences for plant health. Further research will be required to understand the functional implications of these changes and how they impact on plant health and productivity.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||
| Journal or Publication Title: | BMC Biology | ||||||
| Publisher: | BioMed Central Ltd. | ||||||
| ISSN: | 1741-7007 | ||||||
| Official Date: | 20 October 2022 | ||||||
| Dates: |
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| Volume: | 20 | ||||||
| Number: | 1 | ||||||
| Article Number: | 235 | ||||||
| DOI: | 10.1186/s12915-022-01430-z | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 8 November 2022 | ||||||
| Date of first compliant Open Access: | 8 November 2022 |
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