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Genetic control of thermomorphogenesis in tomato inflorescences

Author

Listed:
  • Shuai Sun

    (Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences)

  • Zhiqiang Liu

    (Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences)

  • Xiaotian Wang

    (Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences)

  • Jia Song

    (Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences)

  • Siyu Fang

    (Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences)

  • Jisheng Kong

    (Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences)

  • Ren Li

    (Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences)

  • Huanzhong Wang

    (University of Connecticut)

  • Xia Cui

    (Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A&F University)

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 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.

Suggested Citation

  • Shuai Sun & Zhiqiang Liu & Xiaotian Wang & Jia Song & Siyu Fang & Jisheng Kong & Ren Li & Huanzhong Wang & Xia Cui, 2024. "Genetic control of thermomorphogenesis in tomato inflorescences," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45722-0
    DOI: 10.1038/s41467-024-45722-0
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    References listed on IDEAS

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    1. Jae-Hoon Jung & Antonio D. Barbosa & Stephanie Hutin & Janet R. Kumita & Mingjun Gao & Dorothee Derwort & Catarina S. Silva & Xuelei Lai & Elodie Pierre & Feng Geng & Sol-Bi Kim & Sujeong Baek & Chloe, 2020. "A prion-like domain in ELF3 functions as a thermosensor in Arabidopsis," Nature, Nature, vol. 585(7824), pages 256-260, September.
    2. Yogev Burko & Björn Christopher Willige & Adam Seluzicki & Ondřej Novák & Karin Ljung & Joanne Chory, 2022. "PIF7 is a master regulator of thermomorphogenesis in shade," Nature Communications, Nature, vol. 13(1), pages 1-14, December.
    3. S. Vinod Kumar & Doris Lucyshyn & Katja E. Jaeger & Enriqueta Alós & Elizabeth Alvey & Nicholas P. Harberd & Philip A. Wigge, 2012. "Transcription factor PIF4 controls the thermosensory activation of flowering," Nature, Nature, vol. 484(7393), pages 242-245, April.
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