增强UV-B辐射对番茄幼苗内源激素含量的影响  

Effect of enhanced UV-B radiation on endogenous hormone contents of tomato (Lycopersicon esculentum) seedlings

作　　者：张昌达[1] 张国斌[1] 胡志峰[1] 郁继华[1] 吕建国[1] 杨芳芳[1] 马彦霞[1] 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070

出　　处：《甘肃农业大学学报》2010年第3期44-47,51,共5页Journal of Gansu Agricultural University

基　　金：甘肃省重大专项计划项目(0702NKDA033);甘肃省科技攻关计划项目(2GS052-A41-007-05)

摘　　要：在温室大棚条件下,用UV-B(280～320nm)辐射番茄幼苗,以0.46w·m-2和0.6w·m-2剂量为处理,以自然辐射为对照,研究了UV-B辐射对番茄幼苗的内源激素含量以及IAA/ABA、GA3/ABA、ZR/ABA比例的影响.结果表明:番茄幼苗IAA、GA3、ZR的含量随着辐射的增强而下降,随着辐射时间的延长而减小;而ABA含量随着辐射的增强而升高,随着辐射时间的延长而增大;ABA含量的升高使IAA/ABA、GA3/ABA和ZR/ABA的比值随之降低,最终产生对番茄幼苗生长的抑制.In greenhouse conditions,the impacts of UV-B radiation （280-320 nm） at 0.46 w·m^-2 （T1） and 0.6 w·m^-2（T2） were studied on the endogenous hormone content and the IAA/ABA,GA3/ABA,ZR/ABA ratio of tomato seedlings.The results indicated that UV-B radiation decreased the content of IAA,GA3,ABA in tomato seedlings.The content of IAA,GA3,ZR decreased with enhanced radiation intensity and time; however,ABA content increased with enhanced radiation intensity and time,which caused a decreased values of IAA/ABA,GA3/ABA and ZR/ABA,and suppressed growth and development of tomato consequently.

关 键 词：番茄幼苗 UV-B辐射 内源激素 

分 类 号：S641.2[农业科学—蔬菜学]