首页|The OsBZR1-OsSPX1/2 module fine-tunes the growth-immunity trade-off in adaptation to phosphate availability in rice

The OsBZR1-OsSPX1/2 module fine-tunes the growth-immunity trade-off in adaptation to phosphate availability in rice

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The growth-promoting hormones brassinosteroids(BRs)and their key signaling component BZR1 play a vital role in balancing normal growth and defense reactions.Here,we discovered that BRs and OsBZR1 up-regulated sakuranetin accumulation and conferred basal defense against Magnaporthe oryzae infection under normal conditions.Resource shortages,including phosphate(Pi)deficiency,potentially disrupt this growth-defense balance.OsSPX1 and OsSPX2 have been reported to sense Pi concentration and interact with the Pi signal mediator OsPHR2,thus regulating Pi starvation responses.In this study,we discovered that OsSPX1/2 interacts with OsBZR1 in both Pi-sufficient and Pi-deficient conditions,inhibit-ing BR-responsive genes.When Pi is sufficient,OsSPX1/2 is captured by OsPHR2,enabling most of OsBZR1 to promote plant growth and maintain basal resistance.In response to Pi starvation,more OsSPX1/2 is released from OsPHR2 to inhibit OsBZR1 activity,resulting in slower growth.Collectively,our study reveals that the OsBZR1-SPX1/2 module balances the plant growth-immunity trade-off in response to Pi availability.

Yuqing He、Yao Zhao、Jitao Hu、Lanlan Wang、Linying Li、Xueying Zhang、Zhongjing Zhou、Lili Chen、Hua Wang、Jiaoyu Wang、Gaojie Hong

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State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province,Institute of Virology and Biotechnology,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,P.R.China

Key Laboratory of Traceability for Agricultural Genetically Modified Organisms,Ministry of Agriculture and Rural Affairs,Hangzhou 310021,P.R.China

College of Life Sciences,Zhejiang Sci-Tech University,Hangzhou 310018,P.R.China

State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,P.R.China

State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province,Institute of Plant Protection and Microbiology,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,P.R.China

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Zhejiang Provincial Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaMajor science and Technology Special Project of Variety Breeding of Zhejiang ProvinceState Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts

LR22C020003322725533180024931670291320002342021C02067-7

2024

10.1016/j.molp.2023.12.003

分子植物(英文版)
中科院上海生命科学研究院植物生理生态所　中国植物生理学会

分子植物(英文版)

CSTPCD
影响因子：0.659
ISSN：1674-2052
年,卷(期)：2024.17(2)
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