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Mechanisms of Arbuscular Mycorrhizal Fungi Increasing Silicon Uptake by Rice
- Source :
- Journal of Agricultural and Food Chemistry; 20240101, Issue: Preprints
- Publication Year :
- 2024
-
Abstract
- Arbuscular mycorrhizal fungi (AMF) influence silicon (Si) uptake by plants, but the mechanisms remain unclear. This study investigated the mechanisms of AMF-mediated Si uptake by rice, a model Si-accumulating plant, and explored the tripartite interactions among AMF, Si, and phosphorus (P). AMF inoculation increased shoot Si content by 97% when supplied with silicic acid and by 29% with calcium silicate and upregulated expression of Si transporters Lsi1and Lsi2in roots. Supplying Si only to AMF hyphae increased the root Si content by 113%, indicating direct Si uptake by hyphae. Mechanisms of AMF-induced Si uptake were elucidated: 1) direct Si uptake by hyphae, 2) increased silicate dissolution, and 3) upregulation of Si transporters. Silicon application also increased AMF colonization by 28%, and the absence of interactions was observed on P uptake. Altogether, AMF support Si acquisition and Si fosters AMF colonization in rice, whereas the P uptake depends more on AMF than on Si.
Details
- Language :
- English
- ISSN :
- 00218561 and 15205118
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Journal of Agricultural and Food Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs66761603
- Full Text :
- https://doi.org/10.1021/acs.jafc.4c01487