不同抗旱性小豆根系对干旱-复水的生理生态响应  

Physiological and ecological response of different drought-tolerant adzuki beans root system to drought-rehydration

作　　者：单皓 罗海婧[2] 张松[1] 张久刚 张虎 崔爱民 薛超 张永清[2] SHAN Hao;LUO Haijian;ZHANG Song;ZHANG Jiugang;ZHANG Hu;CUI Aimin;XUE Chao;ZHANG Yongqing(Institute of Wheat Research,Shanxi Agricultural University,Linfen,Shanxi 041000,China;School of Life Science,Shanxi Normal University,Taiyuan,Shanxi 030000,China)

机构地区：[1]山西农业大学小麦研究所,山西临汾041000 [2]山西师范大学生命科学学院,山西太原030000

出　　处：《干旱地区农业研究》2023年第1期94-100,127,共8页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金项目(31571604);山西省自然科学基金项目(2013011030-1)。

摘　　要：为了探究不同抗旱性的小豆品种根系对于干旱-复水的生理生态响应规律,以京农2号、遵化红和B1783为试验材料,研究了干旱胁迫和复水处理对根系形态、根系活力、根系抗氧化酶活性、根系的丙二醛(MDA)、可溶性糖、可溶性蛋白质和脯氨酸含量的影响。结果表明:干旱胁迫对小豆的根系造成了不同程度的损害,引起了小豆根干重、主根长、根系活力、根系可溶性蛋白质含量显著下降,3个品种中京农2号的下降幅度最小,重度干旱胁迫(SS)下降幅分别是8.82%、12.15%、18.83%和15.80%,复水后,各指标值存在不同程度的回升,但仍低于对照;根系超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性升高,京农2号的增幅最大,SS处理下增幅分别是15.02%、86.76%、37.70%;根系MDA、可溶性糖和脯氨酸含量随着干旱胁迫程度的加深而升高,且品种的抗旱性越强,增加量越大,复水后有所恢复但未达到对照水平。不同抗旱性小豆的干旱-复水后的恢复能力存在较大差异,整体表现为抗旱能力越强的小豆品种,干旱-复水后的恢复能力也越强。This study used Jingnong 2,Zunhuahong and B1783 as experimental materials to explore the physiological and ecological responses of the roots of adzuki bean varieties with different drought resistance to drought and rehydration and examine the effects of drought stress and rehydration on root morphology,root system vitality,root antioxidant enzyme activity,malondialdehyde(MDA),soluble sugar,soluble protein and proline content in roots.The test results showed that drought stress caused different degrees of damage to the root system of adzuki bean,resulting in a significant decrease in the dry weight of adzuki bean root,main root length,root activity,and root soluble protein content.Among the three cultivars,Jingnong 2 had the smallest decrease,and the decrease of SS under severe drought stress was 8.82%,12.15%,18.83%and 15.80%,respectively.After rehydration,there were different degrees of recovery,but it was still lower than the control value.The activities of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)in roots increased,and Jingnong 2 had the largest increase,and the increases under SS treatment were 15.02%,86.76%,and 37.70%,respectively.The contents of MDA,soluble sugar and proline in roots increased with the deepening of drought stress,and the stronger the drought resistance of the varieties,the greater the increase.It recovered after rehydration but did not reach the control level.It indicated that the recovery ability of different drought-resistant adzuki beans after drought-rewatering was quite different,and the overall performance was that the more drought-resistant adzuki bean varieties,the stronger the recoverability after drought-rewatering.

关 键 词：小豆 根系 干旱 复水 生理生态响应 

分 类 号：S521[农业科学—作物学] Q945.78[生物学—植物学]