干旱胁迫条件下马铃薯品种的抗旱性评价  

Evaluation of Drought Resistance of Potato Varieties Under Drought Stress

作　　者：王娟 刘全亮 水建兵 史丽萍 冯梅 李珍妮 连小峰 陈小丽 WANG Juan;LIU Quanliang;SHUI Jianbing;SHI Liping;FENG Mei;LI Zhenni;LIAN Xiaofeng;CHEN Xiaoli(Dingxi Academy of Agricultural Sciences,Dingxi,Gansu 743000,China;Gansu Dingxi Baiquan Potato Co.,Ltd.,Dingxi,Gansu 743000,China)

机构地区：[1]定西市农业科学研究院,甘肃定西743000 [2]甘肃定西百泉马铃薯有限公司,甘肃定西743000

出　　处：《中国马铃薯》2023年第2期110-117,共8页Chinese Potato Journal

基　　金：甘肃省技术创新引导计划(22CX3GJ014);甘肃省科技计划民生科技专项(21CX6NJ199);甘肃省科技计划重大专项(21ZD11NJ003)。

摘　　要：马铃薯的抗旱性鉴定可以通过干旱胁迫下的抗旱系数及生理生化指标变化的差异来确定。研究测定5个马铃薯品种在干旱胁迫条件下的抗旱系数及生理生化指标。与正常供水处理相比,干旱胁迫处理下5个品种的茎粗、株高和根长均降低,平均减幅分别为22.70%、17.42%、36.78%。各品种的叶片含水量均降低,‘定薯3号’减幅最小,‘定薯1号’减幅最大。干旱胁迫处理下各品种的离体叶片失水率和根含水率有增加也有减小,叶片含水量和离体叶片失水率均以‘青薯9号’最高,根含水率则以‘陇薯10号’最高。各品种的抗旱系数在0.8754~0.9409,均属于高抗品种。干旱胁迫处理后,各品种较正常供水处理脯氨酸含量均增加,‘青薯9号’增幅高达203.72%。各品种丙二醛含量均增加,‘青薯9号’增幅最小,为3.03%。各品种可溶性蛋白含量均增加。在新品种选育亲本选配及推广过程中,可结合各品种的抗旱特性以及生理指标进行鉴别应用。The drought resistance of potato can be determined by the differences of drought resistance coefficient,physiological and biochemical indexes under drought stress.In this study,the drought resistance coefficient,physiological and biochemical indexes of five potato varieties under drought stress were determined.Compared with normal watering,stem diameter,plant height and root length of five varieties under drought stress decreased by 22.70%,17.42%and 36.78%,respectively.Leaf water content of all varieties under drought stress decreased,with decrease of'Dingshu 3'being the smallest,and'Dingshu 1'being the largest.No obvious change pattern was found for detached leaf water loss rate and root water content in tested varieties under drought stress.The leaf water content and water loss rate of detached leaves were the highest in'Qingshu 9',and the root water content was the highest in'Longshu 10'.The drought resistance coefficient of all varieties ranged from 0.8754 to 0.9409,which belongs to high resistance varieties.After drought stress treatment,the proline content of all varieties increased compared with normal water supply treatment,among which'Qingshu 9'increased by as much as 203.72%.The content of malondialdehyde in all varieties increased,and'Qingshu 9'had the smallest increase of 3.03%.The soluble protein content of all varieties increased.When selecting parents and promoting new varieties,the drought-resistance characteristics and physiological indexes of the tested varieties could be combined for consideration.

关 键 词：马铃薯 干旱胁迫 抗旱系数 脯氨酸 丙二醛 可溶性蛋白 

分 类 号：S532[农业科学—作物学]