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中国农学通报

中国农学通报 ›› 2006, Vol. 22 ›› Issue (10): 459-459.

所属专题： 小麦

• 目次 • 上一篇    下一篇

渗透胁迫对小麦幼苗生长及水分状况的影响

赵丽英,邓西平,山 仑   

  • 出版日期:2006-10-05 发布日期:2006-10-05

Effects of Osmotic Stress on Water Status and Growth of Winter Wheat Seedlings

Zhao Liying, Deng Xiping, Shan Lun   

  • Online:2006-10-05 Published:2006-10-05

摘要： 以耐旱性不同的小麦品种长武134和陕253作为实验材料，研究了PEG-6000模拟干旱水培实验条件下小麦幼苗生长以及水分状况的影响。研究结果表明，在渗透胁迫过程中，两个小麦品种的相对水分含量、水势、叶面积都呈降低的趋势，根系长度、根系面积以及根冠比呈现增加后降低的趋势，陕253在胁迫24h时达到最高值，长武134胁迫30h时达到最高，然后又降低.叶绿素a和叶绿素b的含量在受到胁迫30h之前变化不明显，继续胁迫其含量会急剧下降。说明轻中度干旱并不会影响叶绿素的含量。

关键词: 水稻, 水稻, 群体透光率, 温度, 湿度, 边际优势利用, 生态环境

Abstract: In the paper, two winter wheat varieties, shaan 253 and changwu 134, were used in the experiments. Water culture in artificial growth shelter was designed to investigate response of water status and growth. The results showed that the relative water content, water potential and leaf area showed the trend of drop in the course of osmotic stress, however, root length, root area and root/shoot showed first increase then drop. The maximum value reached at stress 24h for shaan253, and 30h for changwu134. There were not marked changes of chlorophyll a and b before stress 30h, but rapidly dropped with the subsequent drought. It was indicated that the content of chlorophyll was not affected by the moderate drought.