| Effects of uniconazole on yield and stem anti\|stress physiology of adzuki bean under low temperature stress during seedling stage |
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| DOI：10.7606/j.issn.1000-7601.2020.02.28 |
| Key Words: low temperature stress uniconazole adzuki bean stem stress physiological index yield |
| Author Name | Affiliation | | LI Wan | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | XIANG Hongtao | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | HE Ning | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | WANG Xueyang | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | WANG Tongtong | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | WANG Manli | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | TANG Xiaodong | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | LI Yidan | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China |
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| Abstract: |
| In order to investigate the resistance physiology and yield of different adzuki bean varieties and the mitigation effect of uniconazole under low temperature, a pot experiment resrch was conducted in artificial climate chamber. The crop cultivars included cold tolerant and cold sensitive, Baoqinghong and Tianjinhong. The treatment of low temperature (15℃) and spraying S3307 in seedling period of adzuki bean were applied. The lasting days of low temperature (15℃) in the experiment were 1, 2, 3, 4, 5 days, respectively. The purpose was to analyze the effect of uniconazole on the anti\|stress physiological index and yield of adzuki bean against low temperature. The result showed that the physiological indexes in stem of adzuki bean under low temperature were changed during seedling stage, the SOD activities in stem of adzuki bean increased due to the low temperature stress during seedling stage, Baoqinghong increased 15.35% compare with CK at the 2d while Tianjinhong increased 20.73% at the 3 d. The activities of POD and CAT also increased, and the activities were the highest when treated for 3 days. Compared with CK, the activities of POD and CAT of Baoqinghong and Tianjinhong increased by 75.31% and 4.55%, 63.50% and 22.22%, respectively. The content of MDA was also increased, and after 5 days of low temperature treatment, Tianjinhong and Baoqing reached 0.052 μmol·g-1 and 0.053 μmol·g-1, respectively. Compared with treated 1 day, it increased 0.033 μmol·g-1 and 0.027 μmol·g-1, that is, 1.74 times and 1.04 times, respectively. When the stress lasted 5 d, the yield of Baoqinghong and Tianjinhong decreased by 19.39% and 41.69%. Uniconazole had the effect of enhancing low temperatures and reducing crop damage. It effectively increased the content of soluble proteins, and the content in Baoqinghong and Tianjinhong reached the highest when treated for 3 days, Compared with water, it increased by 3.45% and 3.74%, and it significantly reduced the MDA content. When treated for 5 d, compared with spraying water, MDA in Baoqinghong and Tianjinhong decreased by 4.25% and 4.55%, respectively. Meanwhile, POD activity significantly improved. Both of Baoqinghong and Tianjinhong reached the highest at 3 d, which were 3.52% and 11.16% higher than that of spraying water treament, respectively. Spraying uniconazole increased the yield of Baoqinghong and Tianjinhong by 23.06% and 43.88%, respectively. This study concluded that there were significant differences in physiological responses between different adzuki bean varieties, and spraying uniconazole can effectively mitigate damage of low temperature stress on adzuki bean. |
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