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Hereditas(Beijing) ›› 2021, Vol. 43 ›› Issue (11): 1078-1087.doi: 10.16288/j.yczz.21-217

• Orginal Articles • Previous Articles     Next Articles

Transcription factor OsMADS25 improves rice tolerance to cold stress

Lingyue Yan1(), Haojian Zhang1, Yuqing Zheng1, Yunqi Cong1, Citao Liu1, Fan Fan1, Cheng Zheng1, Guilong Yuan2, Gen Pan3, Dingyang Yuan2(), Meijuan Duan1()   

  1. 1. Hunan Provincial Key Laboratory of Rice Stress Biology, College of Agriculture, Hunan Agricultural University, Changsha 410128, China
    2. State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China
    3. Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China
  • Received:2021-06-20 Revised:2021-08-21 Online:2021-11-20 Published:2021-10-12
  • Contact: Yuan Dingyang,Duan Meijuan E-mail:yanlingyue0203@163.com;yuandingyang@hhrrc.ac.cn;duanmeijuan@163.com
  • Supported by:
    Supported by the Hunan Science and Technology Major Project No(2018NK1010);the Hunan Science and Technology Talents Support Project No(2019TJ-Q08);the Research Initiation Fund of Hunan Agricultural University No(20154/5407419002);the Open Research Fund of the State Key Laboratory of Hybrid Rice, Hybrid Rice Research Center No(2020KF05);the Hunan Province Natural Science Fund No(2019JJ50714)

Abstract:

Cold stress is the limiting factor of rice growth and production, and it is important to clone cold stress tolerant genes and cultivate cold tolerance rice varieties. The MADS transcription factors play an important role in abiotic stress signaling in rice. This study showed that OsMADS25 was up-regulated by low temperature and abscisic acid (ABA), suggesting that OsMADS25 may be involved in ABA-dependent signaling. The OsMADS25 overexpression vector, pCambia1300-221-OsMADS25-Flag, was constructed and introduced into the rice variety Zhonghua 11 (ZH11) through Agrobacterium tumefacian-mediated genetic transformation. Two homozygous lines with high expression levels were selected for phenotypic identification. OsMADS25 overexpression lines show significantly improved cold stress tolerance and the sensitivity to ABA at the seedling stage of rice. Reactive oxygen species (ROS) was detected by diaminobenzidine (DAB) staining and nitroblue tetrazolium (NBT) staining. After treatment with cold stress, little ROS accumulation was observed in OsMADS25 overexpression lines compared to wild-type ZH11. In conclusion, OsMADS25 plays a role in scavenging reactive oxygen species (ROS) and could improve rice tolerance to cold stress involved in ABA-dependent pathway.

Key words: rice (Oryza sativa L.), OsMADS25, abscisic acid (ABA), reactive oxygen species(ROS), cold tolerance