Yoneyama, K, Xie, X, Nomura, T et al. (2 more authors) (2022) Supra-organismal regulation of strigolactone exudation and plant development in response to rhizospheric cues in rice. Current Biology, 32 (16). pp. 3601-3608. ISSN 0960-9822
Abstract
Plants have evolved elaborate mechanisms to detect neighboring plants, which typically involve the perception of “cues” inadvertently produced by the neighbor. 1 Strigolactones are hormonal signaling molecules 2 ,3 that are also exuded into the rhizosphere by most flowering plant species to promote arbuscular mycorrhizal symbioses. 4 Since flowering plants have an endogenous perception system for strigolactones, 5 strigolactones are obvious candidates to act as a cue for neighbor presence, but have not been shown to act as such. To test this hypothesis in rice plants, we quantified two major strigolactones of rice plants, orobanchol and 4-deoxyorobanchol, in root exudates by using LC-MS/MS (MRM) and examined feedback regulation of strigolactone biosynthesis and changes in shoot branching phenotypes in rice plants grown at different densities in hydroponics and soil culture. We show that the presence of neighboring plants, or greater root volume, results in rapidly induced changes in strigolactone biosynthesis, sensitivity, and exudation and the subsequent longer-term changes in shoot architecture. These changes require intact strigolactone biosynthesis in neighboring plants and intact strigolactone signaling in focal plants. These results suggest that strigolactone biosynthesis and exudation in rice plants are driven by supra-organismal environmental strigolactone levels. Strigolactones thus act as a cue for neighbor presence in rice plants, but also seem to act as a more general root density-sensing mechanism in flowering plants that integrates soil volume and neighbor density and allows plants to adapt to the limitations of the rhizosphere.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2022 Elsevier Inc. This is an author produced version of an article published in Current Biology. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | strigolactones, neighbor detection, root exudates, rice, plant-plant interactions |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) > School of Biology (Leeds) |
Funding Information: | Funder Grant number BBSRC (Biotechnology & Biological Sciences Research Council) BB/R00398X/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Jul 2022 12:07 |
Last Modified: | 14 Jul 2023 00:13 |
Status: | Published |
Publisher: | Cell Press |
Identification Number: | 10.1016/j.cub.2022.06.047 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:188345 |