摘要
环境胁迫一直以来是影响植物生长和农作物产量的主要因素,而覆盖植物叶片表层的蜡质层在植物生长发育和适应外界环境方面起着关键作用。本试验以中花11、广盐2号和Z46这3个水稻品种进行干旱胁迫处理,通过扫描电镜观察叶片表面蜡质覆盖密度,以及测定叶片相对含水量、叶绿素浸提率以及失水率等生理指标,从而综合分析干旱胁迫对不同水稻品种叶片表面蜡质积累的影响。结果表明:干旱胁迫条件下,3个试验的水稻品种叶片相对含水量降低,叶表面蜡质覆盖量增加,叶绿素浸提率以及离体叶片失水率下降。
Environmental stresses are the main factors which affect plant growth and crop yield. Wax layer which covers the plant surface plays a key role in plant growth and development, and adapting to the external environment. In this study, three rice varieties such as "Zhonghua 11 ", "Euryhaline 2" and "Z46" were treated by drought, then the leaf surface wax coverage was observed by scanning electron microscope (SEM), and the relative water content, chlorophyll extraction rate and water-loss rate were determined so as to analyze synthetically the effect of water stress on the leaf epicuticular wax coverage. The results showed that the leaf relative water content of three tested rice varieties decreased, the leaf epicuticular wax crystals increased, and the chlorophyll leaching and water loss rate decreased under drought resistance.
出处
《基因组学与应用生物学》
CAS
CSCD
北大核心
2013年第6期777-781,共5页
Genomics and Applied Biology
基金
广东省大学生创新实验项目(1134711010)
广东省科技计划项目(2011A020102008)
仲恺农业工程学院大学生创新实验项目(201234)共同资助
关键词
水稻
表面蜡质
干旱胁迫
Rice, Leafepicuticular wax, Drought stress