Crops ›› 2022, Vol. 38 ›› Issue (4): 1-8.doi: 10.16035/j.issn.1001-7283.2022.04.001

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Research Advances on High Temperature Induced-Impairment in Spikelet-Opening and Pistil-Fertilization of Photo-Thermo-Sensitive Genic Male Sterile Rice Lines

Zhou Yujiao1,2(), Zhang Weiyang1,2(), Yang Jianchang1,2   

  1. 1Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/ Agricultural College of Yangzhou University, Yangzhou 225009, Jiangsu, China
    2Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Yangzhou University, Yangzhou 225009, Jiangsu, China
  • Received:2022-03-11 Revised:2022-04-08 Online:2022-08-15 Published:2022-08-22
  • Contact: Zhang Weiyang E-mail:zhouyujiao1028@163.com;wyz@yzu.edu.cn

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Abstract:

The reduction in seed yield of the “two-line-method” hybrid rice under high temperature (HT) stress during anthesis is attributable mainly to the impairment in spikelet-opening and/or pistil-fertilization. To reduce the detrimental impacts of HT stress on the photo-thermo-sensitive genic male sterile (PTSGMS) rice lines, its mechanism should be understood and methods to improve plant thermo-tolerance should be delved. In the publication, the physiological mechanisms of damage to the spikelet-opening, pistil-fertilization, and heading of the PTSGMS rice lines under HT stress were studied. In addition, summarized the intrinsic relationships between hormones and osmotic regulation, antioxidant system, as well as the regulation of the impairment in spikelet-opening and pistil-fertilization of the PTSGMS rice lines under HT stress. The research direction of molecular mechanism of the impairment in spikelet-opening and pistil-fertilization of the PTSGMS rice lines under HT stress is also prospected in this paper. The review may provide insights for improving seed yield of two-line hybrid rice and guiding cultivation and breeding of thermo-tolerance rice.

Key words: Rice, Photo-thermo-sensitive genic male sterile line, High temperature, Spikelet-opening, Pistil-fertilization

Fig.1

Schematic diagram of jasmonates and brassinosteroids in alleviating heat stress to photo-thermo-sensitive genic male sterile (PTSGMS) rice line BZR1: the central transcription factor of brassinosteroids signal transduction; MYC2: the central transcription factor of jasmonic acid signal transduction. The diagram is made according to the references [6⇓⇓⇓-10,16,18,22⇓⇓⇓⇓⇓⇓-29]"

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