数字农科院2.0

Overexpression of TaMBF1c improves thermo-tolerance of perennial ryegrass

文献类型： 外文期刊

作者： Huang, Kunyong;Liu, Yanrong;Shi, Yalan;Tian, Jinli;Shi, Tianran;Peng, Huiru;Tian, Xuejun;Zhang, Wanjun;Wang, Kehua

作者机构：

关键词： Heat stress; Transgenic; Antioxidant enzymes; MBF1; ROS

期刊名称： SCIENTIA HORTICULTURAE

ISSN： 0304-4238

年卷期： 2022 年 295 卷

页码：

收录情况： SCIE（2022版）

摘要： High temperature is one of the major threats to global crop production, especially the C-3 plant species, such as a widely used forage/turfgrass, perennial ryegrass. MBF1c gene belongs to group II of the highly conserved multiprotein bridging factor1 (MBF1) family, and it has been reported to be involved in various plant abiotic stresses, in particular, heat stress. In the study, a wheat MBF1c (TaMBF1c) was overexpressed in perennial ryegrass, and physiological parameters including antioxidant enzyme activities were investigated under both control (16/22 degrees C, n/d) and high temperature (42 degrees C) treatments for 24 and 48 h. The results found that the ectopic expression of TaMBF1c improved thermotolerance of perennial ryegrass, demonstrated by lower leaf electrolyte leakage and lipid peroxidation, better water status, higher chlorophyll content (SPAD index), and net photosynthetic rate under high temperature, while there was no difference between wild type and transgenic perennial ryegrass plants under control condition. The enhanced stress tolerance of transgenic perennial ryegrass was, at least partially associated with its elevated antioxidative capacity under stress. The findings confirmed that MBF1c could confer thermotolerance in C-3 perennial grass species, which offers an additional strategy to develop cool-season turfgrass/forage plants to cope with the challenges of higher temperature and more frequent heat waves due to global warming.

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