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Natural variation in BnaA9.NF-YA7 contributes to drought tolerance in Brassica napus L

Author

Listed:
  • Jia Wang

    (Southwest University
    Southwest University)

  • Lin Mao

    (Southwest University
    Southwest University)

  • Yangyang Li

    (Southwest University
    Southwest University)

  • Kun Lu

    (Southwest University
    Southwest University)

  • Cunmin Qu

    (Southwest University
    Southwest University)

  • Zhanglin Tang

    (Southwest University
    Southwest University)

  • Jiana Li

    (Southwest University
    Southwest University)

  • Liezhao Liu

    (Southwest University
    Southwest University)

Abstract

Rapeseed (Brassica napus) is one of the important oil crops worldwide. Its production is often threatened by drought stress. Here, we identify a transcription factor (BnaA9.NF-YA7) that negatively regulates drought tolerance through genome-wide association study in B. napus. The presence of two SNPs within a CCAAT cis element leads to downregulation of BnaA9.NF-YA7 expression. In addition, the M63I (G-to-C) substitution in the transactivation domain can activate low level expression of BnaA4.DOR, which is an inhibitory factor of ABA-induced stomatal closure. Furthermore, we determine that Bna.ABF3/4s directly regulate the expression of BnaA9.NF-YA7, and BnaA9.NF-YA7 indirectly suppresses the expression of Bna.ABF3/4s by regulation of Bna.ASHH4s. Our findings uncover that BnaA9.NF-YA7 serves as a supplementary role for ABA signal balance under drought stress conditions, and provide a potential molecular target to breed drought-tolerant B. napus cultivars.

Suggested Citation

  • Jia Wang & Lin Mao & Yangyang Li & Kun Lu & Cunmin Qu & Zhanglin Tang & Jiana Li & Liezhao Liu, 2024. "Natural variation in BnaA9.NF-YA7 contributes to drought tolerance in Brassica napus L," Nature Communications, Nature, vol. 15(1), pages 1-17, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46271-2
    DOI: 10.1038/s41467-024-46271-2
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    References listed on IDEAS

    as
    1. Kun Lu & Lijuan Wei & Xiaolong Li & Yuntong Wang & Jian Wu & Miao Liu & Chao Zhang & Zhiyou Chen & Zhongchun Xiao & Hongju Jian & Feng Cheng & Kai Zhang & Hai Du & Xinchao Cheng & Cunming Qu & Wei Qia, 2019. "Whole-genome resequencing reveals Brassica napus origin and genetic loci involved in its improvement," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    2. Zeng Tao & Lisha Shen & Xiaofeng Gu & Yizhong Wang & Hao Yu & Yuehui He, 2017. "Embryonic epigenetic reprogramming by a pioneer transcription factor in plants," Nature, Nature, vol. 551(7678), pages 124-128, November.
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