Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (12): 26-32.doi: 10.11924/j.issn.1000-6850.casb2021-0844

Special Issue: 生物技术 园艺

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Effect of Low Temperature Stress on the Antioxidant System of Sugar Beet

SUN Jiaping1,2(), ZHANG Fushun3,4(), PI Zhi3,4, Zhou Qin3,4   

  1. 1Sino-Russian Joint Graduate School of Heilongjiang University, Harbin 150080
    2Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization in Cold Regions, College of Life Sciences, Heilongjiang University, Harbin 150080
    3College of Modern Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080
    4Sugarbeet Quality Supervision, Inspection and Testing Center of Ministry of Agriculture and Rural Affairs, Harbin 150080
  • Received:2021-07-13 Revised:2021-10-13 Online:2022-04-25 Published:2022-05-18
  • Contact: ZHANG Fushun E-mail:2809506362@qq.com;bill6141@163.com

Abstract:

The aims of this study are to investigate the effects of low temperature stress on cell membrane peroxidation and antioxidant system in sugar beet, and provide reference for studying physiological mechanism of cold resistance in other plants. Sugar beet variety ‘KWS9147' was selected as the experimental material and cultivated in hydroponic culture. The low temperature (4℃) was used as stress treatment (L) and the room temperature (25℃) was used as control (CK). The changes of malondialdehyde (MDA) content and antioxidant system enzyme activity in sugar beet leaves before and after low temperature treatment were measured. The results showed that low temperature stress damaged the cell membrane and promoted the defense role of the antioxidant system. Compared with CK, the content of malondialdehyde (MDA) and the enzyme activity of the antioxidant system changed significantly 1 day after low temperature stress. The content of MDA increased by 31.32%, and the activities of total antioxidant capacity (T-AOC), superoxide dismutase (SOD), peroxidase (POD), ascorbic acid peroxidase (APX) and catalase (CAT) increased significantly by 10.74%, 4 times, 2.22 times, 32.85% and 2.56 times, respectively. In summary, the antioxidant capacity of sugar beet was improved for scavenging the accumulation of reactive oxygen free radicals (ROS) and alleviating membrane damage caused by membrane lipid peroxidation under low temperature stress.

Key words: low temperature, sugar beet, malondialdehyde, antioxidant enzymes, cell membrane damage

CLC Number: