| Effects of exogenous ABA on cold resistance physiology and yield of adzuki bean seedlings under low temperature stress |
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| DOI：10.7606/j.issn.1000-7601.2020.06.08 |
| Key Words: adzuki bean seedlings ABA low temperature resistance physiological index yield |
| Author Name | Affiliation | | XIANG Hongtao | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | LI Wan | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | ZHENG Dianfeng | College of Coastal Agriculture Sciences, Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
College of Agriculture, Heilongjiang Bayi Agriculture University, Daqing, Heilongjiang 163319, China | | WANG Shiya | College of Agriculture, Heilongjiang Bayi Agriculture University, Daqing, Heilongjiang 163319, China | | HE Ning | 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 | | WANG Tongtong | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | YANG Chunjie | Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | LI Bo | 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 difference in the resistance physiology and yield of adzuki bean seedlings, and the mitigation effect of exogenous ABA pretreatment under low temperature, a pot experiment in this research was conducted in an artificial climate chamber. The crop cultivars including cold tolerant and cold sensitive separately were Longxiaodou 4 (LXD 4) and Tianjinhong (TJH). The treatment of low temperature (4℃) and foliar spraying exogenous ABA in seedling period of adzuki bean were applied. The time of low temperature in the experiment last for 12 h. The purpose was to analyze the effect of exogenous ABA pretreatment under low temperature on the anti\|stress physiological indexes (H2O2, malonaldehyde (MDA), antioxidant enzyme activity, soluble substances) and yield factors of adzuki bean. The results showed that the H2O2 content in leaves of LXD 4 and TJH increased by 34.82% and 27.10% after 12 h of low temperature treatment at the seedling stage. The MDA content increased by 65.56% and 83.79%; SOD and POD activities increased by 6.67% and 18.48%, 45.53% and 102.44%; and the proline content increased by 33.12% and 24.41%, respectively. Low temperature treatment caused the 100-seed weight of LXD 4 to decrease significantly by 2.58%, and the number of pods and 100-seed weight of TJH decreased significantly by 18.55% and 10.61% (P＜0.05), respectively. Exogenous ABA had the effect of resisting low temperature. Compared with water, spraying exogenous ABA increased the proline content of LXD 4 and TJH by 9.13% and 19.76%; MDA content decreased by 10.18% and 20.27%; SOD and POD activities increased by 9.06% and 13.57%, 8.26% and 28.51% after 12 h of low temperature treatment. In addition, the yield component (100-seed weight) of LXD 4 and TJH increased 8.56% and 8.92%, respectively. This study concluded that there were significant differences in physiological responses among different adzuki bean varieties, and spraying exogenous ABA effectively relieved damage of low temperature stress to adzuki bean, which provides a theoretical basis for further study on the physiological mechanism against low temperature injury and increases the yield of adzuki bean under low temperature. |
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