江西农业大学学报2011，Vol.33Issue(6)：1062-1066,5.
干旱胁迫下烯效唑对矮牵牛幼苗水分状况和光合特性的影响
Effects of Uniconazole on Water Status and Photosynthetic Parameters of Petunias Seedlings under Drought Stress
摘要
Abstract
Pot experiments were conducted to study the effect of application of different concentrations of uniconazole on water status and photosynthesis of petunia seedlings under the condition of drought with soil water content 40% to 45% of field maximum moisture capacity and rewatering. The results showed that; Under adequate water condition, applying uniconazole promoted the water status and photosynthetic parameters of petunia seedlings in different degrees. Under drought conditions, with the enhancement of drought stress, the leaf relative water content (RWC) , leaf water potential, net photosynthetic rate(Pre) , transpiration rate( Tr) , and stomatal conductance ( Gs ) of all treatments decreased significantly, meanwhile the chlorophyll ( Chi) and the water use efficiency( WUE) increased first and decreased afferwards, while the intercellular C02 concentration (Ci) increased after an initial decrease, Uniconazole application could delay and reduce the inhibition of water status and photosynthesis under drought stress. After rewatering treatment, the water status and photosynthesis in all treatments with application of uniconazole were significantly higher than those of the control. It can conclude that the promotion effect of 30 mg/L was higher than others.关键词
矮牵牛/干旱胁迫/烯效唑/水分状况/光合特性Key words
Petunia hybrida Vilm. / drought stress/ uniconazole/ water status/ photosynthetic parameters分类
农业科技引用本文复制引用
李宁毅,宋妍,韩晓芳..干旱胁迫下烯效唑对矮牵牛幼苗水分状况和光合特性的影响[J].江西农业大学学报,2011,33(6):1062-1066,5.基金项目
辽宁省教育厅基金项目(L2010498) （L2010498）
