文献类型： 外文期刊
作者： Tian, Wen Hao 1 ; Cai, Wen Yan 1 ; Zhu, Chun Quan 1 ; Kong, Ya Li 1 ; Cao, Xiao Chuang 1 ; Zhu, Lian Feng 1 ; Ye, Jia Yuan 3 ; Zhang, Jun Hua 1 ; Zheng, Shao Jian 3 ;
作者机构： 1.China Natl Rice Res Inst, State Key Lab Rice Biol & Breeding, Hangzhou 310006, Peoples R China
2.Zhejiang A&F Univ, Coll Environm & Resource Sci, Hangzhou 311300, Peoples R China
3.Zhejiang Univ, Coll Life Sci, State Key Lab Plant Environm Resilience, Hangzhou 310058, Peoples R China
关键词： Ca deficiency; Ca homeostasis; CCX1; STOP1; transcriptional response
期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：9.3； 五年影响因子：9.3 ）
ISSN： 1672-9072
年卷期： 2024 年
页码：
收录情况： SCI
摘要： Calcium (Ca) is essential for plant growth and stress adaptation, yet its availability is often limited in acidic soils, posing a major threat to crop production. Understanding the intricate mechanisms orchestrating plant adaptation to Ca deficiency remains elusive. Here, we show that the Ca deficiency-enhanced nuclear accumulation of the transcription factor SENSITIVE TO PROTON RHIZOTOXICITY 1 (STOP1) in Arabidopsis thaliana confers tolerance to Ca deprivation, with the global transcriptional responses triggered by Ca deprivation largely impaired in the stop1 mutant. Notably, STOP1 activates the Ca deprivation-induced expression of CATION/Ca(2+ )EXCHANGER 1 (CCX1) by directly binding to its promoter region, which facilitates Ca2+ efflux from endoplasmic reticulum to cytosol to maintain Ca homeostasis. Consequently, the constitutive expression of CCX1 in the stop1 mutant partially rescues the Ca deficiency phenotype by increasing Ca content in the shoots. These findings uncover the pivotal role of the STOP1-CCX1 axis in plant adaptation to low Ca, offering alternative manipulating strategies to improve plant Ca nutrition in acidic soils and extending our understanding of the multifaceted role of STOP1.
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