不同小麦品种发芽期水分胁迫生理响应机制研究  

Study on Physiological Response Mechanism of Water Stress in Different Wheat Varieties during Germinating Period

作　　者：孙常青[1] 屈非[1] 王晋[1] 韵晓冬 孙丽 郭志利[1] SUN Changqing;QU Fei;WANG Jin;YUN Xiaodong;SUN Li;GUO Zhili(Institute of Crop Sciences,Shanxi Academy of Agricultural Sciences,Taiyuan 030031,China;Department of Foreign Languages,Taiyuan College,Taiyuan 030012,China)

机构地区：[1]山西省农业科学院作物科学研究所,山西太原030031 [2]太原学院外语系,山西太原030012

出　　处：《山西农业科学》2018年第10期1598-1601,共4页Journal of Shanxi Agricultural Sciences

基　　金：山西省科技攻关项目(20150311002-5)

摘　　要：采用19.2%的PEG6000模拟水分胁迫24 h,比较了2个小麦品种运旱20410(耐旱品种)和临远3158(水地品种)在发芽期芽和根的相对电导率、丙二醛(MDA)和脯氨酸(Pro)含量等生理指标。结果表明,发芽期水分胁迫24 h后,运旱20410芽与根的相对电导率比对照分别增加了3.38%和6.72%,临远3158芽和根分别比对照增加了23.75%和21.58%;运旱20410芽和根中的丙二醛含量也分别比对照增加了39.80%和52.27%,临远3158芽和根分别比对照增加了34.70%和25.58%;而且2个小麦品种芽和根中的脯氨酸含量在水分胁迫下均大幅增加,运旱20410分别达到未胁迫的5.51倍和5.80倍,而临远3158也为未胁迫的3.24倍和1.85倍。与水地品种临远3158相比,旱地品种运旱20410的脯氨酸积累更迅速,丙二醛含量和电导率的增加量相对也更少,干旱胁迫对该品种细胞膜破坏性相对更小,对水分胁迫的适应性更强,更加耐旱。The relative conductivity, proline and malondialdehyde（MDA）contents of shoots and roots at seeds germination periodof Yunhan 20410 （dryland species）and Linyuan 3158 （water species）were compared under water stress that was caused by using19.2% PEG6000 for 24 h. The results showed that after water stress for 24 h, the relative conductivity of shoots and roots of Yunhan20410 increased 3.38% and 6.72% , respectively, and increased 23.75% and 21.58% , respectively, in Linyuan 3158. Themalondialdehyde （MDA）content of shoots and roots in Yunhan 20410 increased 39.80% and 52.27%, respectively, and increased34.70% and 25.58%, respectively, in Linyuan 3158 compared with the control. In addition, the proline content in the shoots and roots ofthe two wheat varieties increased significantly under water stress. The Yunhan 20410 reached 5.51 times and 5.80 times, respectively, asmuch as unstressed, while the Linyuan 3158 was 3.24 times and 1.85 times, respectively, that of the untressed content. The prolineaccumulation of dryland variety Yunhan 20410 was faster than that of waterland variety Linyuan 3158. The increase amount ofmalondialdehyde and conductivity is relatively small. Drought stress is relatively less destructive to the cell membrane of this cultivar, andit is more adaptable to water stress, which is more drought-tolerant.

关 键 词：小麦 水分胁迫 相对电导率 丙二醛 脯氨酸 

分 类 号：S512.1[农业科学—作物学]