外源甜菜碱对作物的抗旱作用效果研究  

Effect of exogenous betaine on drought resistance of different crops

作　　者：张建新[1] 徐福利[2] 吕家珑[1] 李亚兰[1] 李东[1] 

机构地区：[1]西北农林科技大学,陕西杨凌712100 [2]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《干旱地区农业研究》2003年第2期86-90,共5页Agricultural Research in the Arid Areas

基　　金：杨凌农业高新技术产业示范区科研专项基金(98A11)

摘　　要：通过小麦浸种、水培、大面积喷施和茄子盆栽试验,研究了不同浓度外源甜菜碱对作物的抗旱作用效果。结果表明:外源甜菜碱浓度为25～50mg/L时可促进小麦种子发芽,光合作用强度[达7.07～7.57μmol/(s·m^2)]及生物学产量增加;在外源甜菜碱浓度100 mg/L时小麦幼苗叶片硝酸还原酶活性最高,达到35.23μg/(g·h),同时小麦抗旱性增强。数学模式寻优结果表明:在外源甜菜碱浓度26.4～68.9mg/L,土壤水分含量12.6％～20.7％时,可获得最佳的茄子生物总量。Experiments have been conducted to investigate the effects of exogenous betaine on drought resistance of wheat and eggplant. The results indicated that the germination percentage, photosynthesis intensity [being 7. 07-7. 57μmol/(s·m2)] and biomass production of wheat were increased when the concentration of exogenous betaine was between 25 mg/L and 50 mg/L. Activity of nitrate reductase in wheat leaves reached the maximum value 35. 23μg/(g·h), and the drought resistance of wheat could be enhanced when the concentration of exogenous betaine was 100 mg/L. In accordance with the results of mathematics simulation, the best biomass production of eggplant could appear when the concentration of exogenous betaine was 26. 4-68. 9 mg/L and the content of soil water was 12. 6%-20. 7%.

关 键 词：外源甜菜碱 作物 抗旱性 硝酸还原酶 土壤水分 生物学产量 作用机理 

分 类 号：S482.8[农业科学—农药学]