摘要
为探讨不同外源物质对干旱胁迫下小麦生理特性的影响,筛选有效增强小麦抗旱性的外源物质及施用方法,选用黄腐酸、脯氨酸、KH_2PO_4、葡萄糖4种物质的不同组合,在抽穗期用喷雾法对小麦进行处理,研究了小麦抽穗后旗叶光合速率,可溶性糖、可溶性蛋白、丙二醛(MDA)含量,超氧化物歧化酶(SOD)、过氧化物酶(POD)活性等生理特性。结果表明,在水分胁迫下外源物质处理可以提高旗叶光合速率,可溶性糖、可溶性蛋白含量以及保护酶活性,同时有效降低MDA含量,从而增强小麦抗旱性,提高小麦产量。试验表明,外源物质处理对于增强小麦抗旱性具有一定效果,黄腐酸+脯氨酸+葡萄糖+KH_2PO_4复配处理效果最好。
In order to explore the effect of different exogenous substance on physiological characteristics in wheat under water stress, to screen exogenous substances and its application methods for enhancing drought resistance of wheat, different combinations of fulvic acid, proline, potassium dihydrogen phosphate, glucose were selected for the study. Exogenous substances were sprayed at wheat heading stage. The flag leaf photosynthetic rate, soluble sugar, soluble protein, malondialdehyde（MDA） content, superoxide dismutase（SOD）, peroxidase（POD） activity were studied after heading.The results showed that spraying exogenous substances increased photosynthetic rate, soluble sugar content, soluble protein content and the protective enzyme activity in flag leaf under water stress, but MDA content decreased, which might result in the increase of the wheat drought resistance and the grain yield. The results showed that exogenous substances could enhance the drought resistance of wheat, increase wheat yield.The compound of fulvic acid, proline, glucose and potassium dihydrogen phosphate was the best treatment group.
出处
《作物杂志》
CAS
北大核心
2016年第3期139-143,共5页
Crops
基金
河南省自然科学基金研究项目(132300410153)
河南科技大学大学生研究训练计划(2015133)
关键词
小麦
水分胁迫
外源物质
生理性状
Wheat
Water stress
Exogenous substances
Physiological characteristics
