两个玉米自交系苗期叶温的干旱响应研究  

Response of Leaf Temperature of Two Maize Inbred Lines at Seedling Stage to Drought Using Infrared Thermography

作　　者：刘亚[1] 丁俊强[1] Subhash Chander 李建生[1] 

机构地区：[1]中国农业大学国家玉米改良中心农业部基因组学与遗传改良重点实验室

出　　处：《作物杂志》2008年第6期62-65,共4页Crops

基　　金：国家重点基础研究发展计划(973计划)项目(2003CB114301)

摘　　要：利用远红外热成像系统的技术,研究玉米自交系综3与87-1苗期叶片对干旱的响应以及生物量的积累变化。结果表明,在遭受中度干旱胁迫的条件下,87-1的相对生物鲜重(0.716)及相对生物干重(0.799)显著高于综3(0.564,0.658),87-1的叶温差(0.30℃)显著高于综3(0.13℃)。通过离体叶片分析,综3离体叶片较87-1失水速率快,叶温在离体短时间内下降更低。表明在响应水分胁迫方面,87-1较综3叶片蒸发量小,叶温变化大,保水能力好,87-1表现出了更强的耐旱性。生物量积累与叶温差存在紧密的相关性,较高叶温差的基因型在遭受到水分胁迫时生物量积累更强。In this study responses of leaf temperature and biomass accumulation to drought stress of two maize inbred lines Zong3 and 87-1 were analyzed using infrared thermal thermography. The results showed that under moderate drought stress the maize inbred line 87-1 was superior to Zong3 in terms of the production of biomass accumulation, respectively. The leaf temperature variation of 87-1 （0. 30℃ ） showed significant higher than Zong3 （0. 13℃）. In addition, leaves in vitro of Zong3 lost more water than 87-1, and leaf temperature decreased more quickly. When encountered drought stress the leaves in vitro of Zong3 had more transpiration, smaller leaf temperature variation and weaker water retention capacity. Response of leaf temperature to water stress was closely related to biomass accumulation. The genotype showing greater leaf temperature difference had larger biomass accumulation.

关 键 词：玉米 叶温 远红外热成像 干旱 

分 类 号：S513[农业科学—作物学] Q945.78[生物学—植物学]