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A phosphate starvation response-centered network regulates mycorrhizal symbiosis
Open accessAbstract
To secure phosphorus (P) from soil, most land plants use a direct phosphate uptake pathway via root hairs and epidermis and an indirect phosphate uptake pathway via mycorrhizal symbiosis. The interaction between these two pathways is unclear. Here, we mapped a network between transcription factors and mycorrhizal symbiosis-related genes using Y1H. Intriguingly, this gene regulatory network is governed by the conserved P-sensing pathway, centered on phosphate starvation response (PHR) transcription factors. PHRs are required for mycorrhizal symbiosis and regulate symbiosis-related genes via the P1BS motif. SPX-domain proteins suppress OsPHR2-mediated induction of symbiosis-related genes and inhibit mycorrhizal infection. In contrast, plants overexpressing OsPHR2 show improved mycorrhizal infection and are partially resistant to P-mediated inhibition of symbiosis. Functional analyses of network nodes revealed co-regulation of hormonal signaling and mycorrhizal symbiosis. This network deciphers extensive regulation of mycorrhizal symbiosis by endogenous and exogenous signals and highlights co-option of the P-sensing pathway for mycorrhizal symbiosis.
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Metadata
- Authors
- Shi, J., Zhao, B., Zheng, S., Zhang, X., Wang, X., Dong, W., Xie, Q., Wang, G., Xiao, Y., Chen, F., Yu, N., & Wang, E.
- Venue
- Cell
- Publisher
- Elsevier BV
- Published
- 2021-10
- Volume
- 184
- Issue
- 22
- Pages
- 5527-5540.e18
- ISSN
- 0092-8674 (ISSN-L)
- OpenAlex
- W3206598272
- Cited by
- 384
- References
- 56
- FWCI
- 28.46
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Shi, J., Zhao, B., Zheng, S., Zhang, X., Wang, X., Dong, W., Xie, Q., Wang, G., Xiao, Y., Chen, F., Yu, N., & Wang, E. (2021). A phosphate starvation response-centered network regulates mycorrhizal symbiosis. Cell. https://doi.org/10.1016/j.cell.2021.09.030
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