河南农业科学2011，Vol.40Issue(2)：125-127,3.
逐渐干旱对牡丹实生苗某些生理指标的影响
Effects of Gradual Drought on Physiological Indexs of Seedling in Paeonia suffruticosa
摘要
Abstract
The seedlings,Paeonia suffruticosa Feng Dan were used as material to study the changes of physiological indexs, such as chlorophyll content, photosynthesis, CAT activity. The result indicated that chlorophyll content increased first, then decreased with the intensification of draught.In contrast to non-drought, chlorophyll content maximized increasing by 18. 6％ under slight drought and minimized decreasing by 51.2％ under severe drought. Pn,Ci and Gs were all declining and at the lowest volume under severe drought,going down by 88.0％ ,89.4％ ,78.6％ compared to non-drought respectively. Trincreaced then decreaced under moderate drought and it droped by 50％ under severe drought conpared to non-drought. The changes showed that photosynthesis of seedlings was restrained to some degree. CAT activiity had different changes in roots and leaves,and in leaves, it rose then droped with the intensification of draught. On the whole CAT activity increased under drought stress compared to non-drought. CAT activity decreased gradually in roots. All indexs rebounded, but could not reach the lever of non-drought after watering.关键词
牡丹/实生苗/干旱胁迫/光合作用Key words
Paeonia suffruticosa/ Seedling/ Drought stress/ Photosynthesis分类
农业科技引用本文复制引用
逯久幸,李闯,李永华,杨秋生..逐渐干旱对牡丹实生苗某些生理指标的影响[J].河南农业科学,2011,40(2):125-127,3.基金项目
河南省教育厅自然科学研究计划(2009A220002) （2009A220002）
