Genetic control of thermomorphogenesis in tomato inflorescences

• DOI: 10.1038/s41467-024-45722-0
• Publication Date: 2024-02-17T13:02:03Z
• Authors: Shuai Sun; Zhiqiang Liu; Xiaotian Wang; Jia Song; Siyu Fang; Jisheng Kong; Ren Li; Huanzhong Wang; Xia Cui
• Keywords: Science; Meristem; Arabidopsis; Plant Science; Solanum; Gene; Article; Molecular Mechanisms of Plant Development and Regulation; Molecular Mechanisms of Photosynthesis and Photoprotection; Agricultural and Biological Sciences; 03 medical and health sciences; Photosynthetic Acclimation; Biochemistry, Genetics and Molecular Biology; Genetics; Inflorescence; Molecular Biology; Biology; Allele; 0303 health sciences; Q; Botany; Mutant; Life Sciences; Molecular Mechanisms of Pollen Development and Function; FOS: Biological sciences; Locus (genetics); Transcription factor

Abstract 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 high tomato Solanum lycopersicum ). The non-functional mib2 allele may have been selected large-fruited varieties ensure larger more uniform fruits under varying temperatures. MIB2 gene encodes a homolog of Arabidopsis thaliana transcription factor SPATULA; its expression induced meristems at temperature. directly binds promoter downstream CONSTANS-Like1 SlCOL1 ) by recognizing conserved G-box motif activate reproductive meristems. Overexpressing rescue reduced , suggesting MIB2–SlCOL1 module helps inflorescences adapt Our findings reveal molecular mechanism underlying thermomorphogenesis provide target climate-resilient