增强UV-B辐射对小麦叶片内源ABA和游离脯氨酸的影响  

Effect of enhanced UV-B radiation on endogenous ABA and free proline contents in wheat leaves

作　　者：杨景宏[1] 陈拓[2] 王勋陵[1] 

机构地区：[1]兰州大学生物系,兰州730000 [2]中国科学院兰州冰川冻土所冰芯与寒区环境开放实验室,兰州720000

出　　处：《生态学报》2000年第1期39-42,共4页Acta Ecologica Sinica

基　　金：国家自然科学基金;博士点基金

摘　　要：研究温室种植的小麦在0(CK)、8.82KJ/m2(T1)和12.6KJ/m2(T2)3种剂量的UV-B辐射下其内源ABA和游离脯氨酸含量的变化。UV-В辐射导致叶绿体膜脂脂肪酸配比改变和IUFA降低、叶片MDA含量升高及ABA和游离脯氨酸积累。分析表明,UV-B辐射对膜系统的损坏也许是内源ABA和游离脯氨酸含量增加的原因之一,而后者也是植物抵抗UV-B胁迫所做出的适应性反应。The changes of endogenous ABA and free proline in wheat leaves exposed to 0(CK)、8 82KJ/m 2( T 1) and 12 6KJ/m 2( T 2 ) were studied. Enhanced UV B radiation led to changes of the composition of fatty acids as well as decrease of IUFA in chloroplast membrane, increase in MDA content and accumulation of ABA and proline. The analysis indicated that damage of UV B radiation to membrane system may be the reason accumulating endogenous ABA and free proline. The latter is the adaptive mechanism of plants to UV B radiation stress.

关 键 词：小麦 UV-B辐射 内源ABA 游离脯氨酸 逆境胁迫 

分 类 号：Q494[生物学—生理学]