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

文献类型: 外文期刊

作者: He, Yuqing 1 ; Zhao, Yao 1 ; Hu, Jitao 1 ; Wang, Lanlan 1 ; Li, Linying 1 ; Zhang, Xueying 1 ; Zhou, Zhongjing 4 ; Chen, Lili 1 ; Wang, Hua 1 ; Wang, Jiaoyu 5 ; Hong, Gaojie 1 ;

作者机构: 1.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Managing Biot & Chem Threats Qual &, Key Lab Biotechnol Plant Protect MOA China & Zheji, Hangzhou 310021, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Traceabil Agr Genet Modified Organisms, Hangzhou 310021, Peoples R China

3.Zhejiang Sci Tech Univ, Coll Life Sci, Hangzhou 310018, Peoples R China

4.Zhejiang Acad Agr Sci, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China

5.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Managing Biot & Chem Threats Qual &, Key Lab Biotechnol Plant Protect MOA China & Zheji, Hangzhou 310021, Peoples R China

期刊名称:MOLECULAR PLANT ( 影响因子:17.1; 五年影响因子:21.4 )

ISSN: 1674-2052

年卷期: 2024 年 17 卷 2 期

页码:

收录情况: SCI

摘要: 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 upregulated 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, inhibiting 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.

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