摘要： 以贵州优质高产玉米黔玉22为研究材料,在土壤肥力和环境条件一致的前提下,研究和分析了玉米生育特性及生理特征对不同水分胁迫程度的感应关系。结果表明:水分胁迫对玉米的生长发育影响很大,在中度干旱条件下,叶片脯氨酸含量增多,细胞膜透性增加,导致叶片光合作用、硝酸还原酶活性和叶绿素含量降低,单株最大叶面积、叶片数和干物质积累量相对减少,玉米生长缓慢,生育进程推迟;随着水分胁迫程度的加剧和持续,玉米生长发育严重受阻,无法进行生殖发育,叶片脯氨酸含量持续增多,细胞膜透性进一步增加,叶片光合作用及硝酸还原酶活性进一步减弱,差异达到1%极显著水平。

关键词: 玉米, 水分胁迫, 生长发育, 生理特征

Abstract: Taking the Qianyu 22 as study material, based on the premise that soil fertility and environmental condtion were identical, studied and researched the reaction relation between the growth and physiological characteristics ocorn and water stress. The results showed that the effect of water stress on the growth of corn was great. Under the condtion of intermediate water stress, the content of PRO increased, permeability of the membrane enhanced, which leaded the photosynthesis, the NR act ivity and the chlorophyll content to decrease. The largest leaf area, the number of leaves and dry matter accumulat ion decreased relatively, and the corn grew slower, the grow progress was delayed. Along with the level of water stresscs increasing and sustaining, the growth of corn was disrupted, and canct carry out the production progress. Continuously, the content of PRO increased, permeability of the membrane enhanced, the photosynthesis, the NR activity and the chlorophyll content decreased further, the difference reached 1% of the extremely significant levels.

Key words: Corn, Water stress, Growth, Physiological characteristics

中图分类号: 

• S513.01