Uniconazole Foliar Spray Treatment Alleviates Cold Stress in Adzuki Bean (Vigna angularis) Seedlings. | [International Journal of Agriculture and Biology • 2020]

Author(s):

1. Hongtao Xiang: Crop Tillage and Cultivation Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086, Heilongjiang,China

2. Wan Li: Crop Tillage and Cultivation Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086, Heilongjiang,China

3. Dianfeng Zheng: College of Agronomy, Heilongjiang Bayi Agricultural University,Daqing 163319, Heilongjiang,China

4. Yuting Liang: East University of Heilongjiang,Harbin 150066, Heilongjiang,China

5. Xueyang Wang: Crop Tillage and Cultivation Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086, Heilongjiang,China

6. Xiaoyan Liang: College of Agronomy, Heilongjiang Bayi Agricultural University,Daqing 163319, Heilongjiang,China

7. Tongtong Wang: Crop Tillage and Cultivation Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086, Heilongjiang,China

8. Manli Wang: Crop Tillage and Cultivation Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086, Heilongjiang,China

9. Chunjie Yang: Crop Tillage and Cultivation Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086, Heilongjiang,China

10. Jia Liu: Plant Protection Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086, Heilongjiang,China

11. Ning He: Crop Tillage and Cultivation Institute, Heilongjiang Academy of Agricultural Sciences,Harbin 150086, Heilongjiang,China

Abstract:

Uniconazole is a plant growth regulator that inhibits the cytochrome P450 family of enzymes, which are involved in the catabolism of abscisic acid (ABA), and promotes plant growth and stress resistance. To investigate the cold-stress resistance of adzuki bean (Vigna angularis) seedlings, the cold-tolerant accession Baoqinghong (BQH) and the cold-sensitive accession Tianjinhong (TJH) were foliar sprayed with 20 µM uniconazole, followed by cold stress at 15°C for 5 d. Our results revealed that foliar spray of 20 µM uniconazole considerably increased the crop yield and yield-related parameters, including the number of pods per plant, the number of seeds per pot, and the 100-grain weight, in both TJH and BQH under cold stress. The malondialdehyde (MDA) and osmolyte content as well as antioxidant enzymatic activity were higher in BQH than in TJH. Foliar treatment with uniconazole (20 µM; 225 L/Ha) significantly increased the yields in both BQH and TJH under cold-stress exposure. Therefore, we concluded that foliar treatment with 20 µM uniconazole effectively promoted the cold tolerance of the adzuki bean cultivars by interacting with endogenous ABA and physiological adaptation, including the activities of antioxidant enzymes and the levels of osmolytes. These results provide novel insights and are expected to aid in the development of more effective stress resistance breeding programs in adzuki bean production. ©

Page(s): 235-240

DOI: 10.17957/IJAB/15.1281

Published: Journal: International Journal of Agriculture and Biology, Volume: 23, Issue: 1, Year: 2020

Keywords:

Uniconazole , Yield Abbreviations

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