西北林学院学报2011，Vol.26Issue(4)：27-32,6.
油菜素内酯对干旱胁迫下山杏光合作用的影响
Effects of Brassinolide on Photosynthesis of Prunus armeniaca L.var.ansu under Drought Stress
摘要
Abstract
In order to examine the effect of brassinolide(BR) on the photosynthesis of Prunus armeniaca L.var. ansu under drought stress, the diurnal changes of photosynthesis and chlorophyll contents of P. armeniaca seedlings were measured and analyzed by using potted-seedlings to control soil water and dipping roots and spraying leaves of seedlings with 0.2 mg· L-4 BR. The results showed that BR had no effect on diurnal change trend of photosynthetic parameters of Pn, Tr,Gs and Ci of the seedlings under both light and severe drought. Under light drought conditions, the opening of leaf stomata increased by the treatment of 0.2 mg · L-1 BR at noon and in the afternoon. At the same time the photosynthetic activities of leaf cells were enhanced and the photosynthesis of the seedlings was improved. Under severe drought conditions,the opening of leaf stomata increased by the treatment of 0.2 mg · L-1 BR in the afternoon. But the photosynthetic activity of leaf cells was no affected and it was limited for improvement of photosynthesis. Because of the opening of leaf stomata, the transpiration of the seedlings was intensified and this resuited in a large loss of water. There was no significant effect on chlorophyll contents under both light and severe drought conditions.关键词
油菜素内酯/干旱胁迫/山杏/光合作用Key words
brassinolide/ drought stress/ Prunusarmeniaca L. var. ansu/ photosynthesis分类
农业科技引用本文复制引用
韩刚,李凯荣..油菜素内酯对干旱胁迫下山杏光合作用的影响[J].西北林学院学报,2011,26(4):27-32,6.基金项目
林业公益性行业科研专项:油由污染胁迫立地植被恢复技术研究(201104002-4) （201104002-4）
