Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (1): 6-10.doi: 10.11924/j.issn.1000-6850.casb17090080

Special Issue: 小麦 园艺

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Winter Wheat Varieties Under Low Temperature: Glycine Betaine and Its Related Metabolic Pathways

  

  • Received:2017-09-13 Revised:2018-05-04 Accepted:2018-05-23 Online:2019-01-02 Published:2019-01-02

Abstract: The paper aims to study glycine betaine (GB) and the protection effect of betaine aldehyde dehydrogenase (BADH), which is the key synthetase, on wheat. The author planted two winter wheat varieties with different cold resistance,‘Dongnongdongmai1’(DM1) and‘Jimai22’(J22) under natural condition, and analyzed the relative electrical conductivity, malondialdehyde (MDA) content, BADH activity, the expression of BADH, and the content of GB at the seedling stage. The results showed that: DM1 presented a great increase in BADH activity and GB content, but a decrease in MDA content under freezing condition compared with J22, indicating that the expression of BADH promoted the accumulation of glycine betaine and increased the stability of cell membrane. The results of this study not only confirm the role of glycine betaine in cold resistance of DM1, but also provide a new research direction for improving the cold resistance of winter wheat in the future.