文献类型： 外文期刊
作者： Sun, Shuai 1 ; Liu, Zhiqiang 1 ; Wang, Xiaotian 1 ; Song, Jia 1 ; Fang, Siyu 1 ; Kong, Jisheng 1 ; Li, Ren 1 ; Wang, Huanzhong 2 ; Cui, Xia 3 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Vegetables & Flowers, State Key Lab Vegetable Biobreeding, Sino Dutch Joint Lab Hort Genom, Beijing 100081, Peoples R China
2.Univ Connecticut, Dept Plant Sci & Landscape Architecture, Storrs, CT 06269 USA
3.Zhejiang A&F Univ, Coll Hort Sci, Key Lab Qual & Safety Control Subtrop Fruit & Vege, Minist Agr & Rural Affairs, Hangzhou 311300, Zhejiang, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）
ISSN：
年卷期： 2024 年 15 卷 1 期
页码：
收录情况： SCI
摘要： Understanding how plants alter their development and architecture in response to ambient temperature is crucial for breeding resilient crops. Here, we identify the quantitative trait locus qMULTIPLE INFLORESCENCE BRANCH 2 (qMIB2), which modulates inflorescence branching in response to high ambient temperature in tomato (Solanum lycopersicum). The non-functional mib2 allele may have been selected in large-fruited varieties to ensure larger and more uniform fruits under varying temperatures. MIB2 gene encodes a homolog of the Arabidopsis thaliana transcription factor SPATULA; its expression is induced in meristems at high temperature. MIB2 directly binds to the promoter of its downstream gene CONSTANS-Like1 (SlCOL1) by recognizing the conserved G-box motif to activate SlCOL1 expression in reproductive meristems. Overexpressing SlCOL1 rescue the reduced inflorescence branching of mib2, suggesting how the MIB2-SlCOL1 module helps tomato inflorescences adapt to high temperature. Our findings reveal the molecular mechanism underlying inflorescence thermomorphogenesis and provide a target for breeding climate-resilient crops. Mechanisms underlying changes in inflorescence development in response to high ambient temperature remain unclear. Here, the authors report the cloning of the MIB2, encoding a homology of SPATULA, and its activation of CONSTANS-Like1 for determining tomato inflorescence branching at high ambient temperature.
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