摘要
研究了育苗温室内低光下生长的玉米幼苗移栽到大田自然光的光转换过程中的形态和生理特性变化。结果表明,玉米幼苗由温室低光环境移栽到大田自然光的过程中,叶片厚度、栅栏组织厚度和叶绿素a/b比值略高于低光下生长的叶片,明显低于自然光下生长的叶片;叶绿素含量与低光下生长的叶片相似,明显高于自然光下生长的叶片;单株根系干重和根冠比明显高于低光下生长的叶片;叶片中RuBP羧化效率、光饱和点、光饱和时的光合速率比低光下略高,明显低于自然光下生长的叶片;表观量子效率较高。移栽10d后转换光下的叶片实际光化学效率和非光化学猝灭系数随光强的变化介于低光和自然光之间,光合能力较低,热耗散能力增强。说明低光下叶片在移栽后的叶片结构和光合功能没有达到自然光下的水平,光合能力的提高主要依赖于根系增长和过剩光能耗散以减轻光抑制。
The changes of morphological and physiological characteristics in maize seedlings from low light in seedling greenhouse to sunlight in the field were investigated.The results showed that the thickness of leaf,palisade parenchyma and ratio of chlorophyll a/b in leaves of transferred seedlings were slightly higher than that in low light and significantly lower than that in sunlight.Chlorophyll content in leaves of transferred seedlings was similar to that in low light and higher than that in sunlight.Root dry...
出处
《玉米科学》
CAS
CSCD
北大核心
2010年第5期60-64,共5页
Journal of Maize Sciences
基金
黑龙江省重大项目(GA01A003)
关键词
玉米
光合作用
荧光特性
Maize
Photosynthesis
Chlorophyll fluorescence
