天然油菜素内酯对核桃叶片水分和光合速率的影响  

The Effect of Natural Brassinolide on the Water Contents and the Photosynthetic Rate of Walnut Leaves

作　　者：李凯荣[1] 张胜利[1] 李晓军[1] 

机构地区：[1]西北农林科技大学资源环境学院,杨凌712100

出　　处：《园艺学报》2003年第6期715-718,共4页Acta Horticulturae Sinica

摘　　要：用不同浓度的天然油菜素内酯喷施核桃叶面,增加了叶片含水量、相对含水量、自由水和临界饱和亏,降低了自然饱和亏、需水程度、蒸腾强度、细胞膜透性和伤害率,提高了叶绿素含量和叶片的光合作用。在不同浓度的处理中,0.30 mg·L-1的处理效果最好,与对照相比,叶片含水量、相对含水量、自由水含量和临界饱和亏分别提高了9.6％、16.1％、7.9％和26.8％,自然饱和亏和需水程度分别降低了9.0％和24.5％,蒸腾强度在中午(13:30)降低了32.7％,细胞膜透性和伤害率分别降低了2.5％和7.1％,叶绿素总量增加了310.3％,光合速率提高了444.9％。To provide the theoretical basis on walnut cultivation, the water contents and the photosynthetic rate of walnut leaves were studied after the leaves were treated with natural brassinolide. The experiment was set up as a randomized complete design with three replicates. The research results showed that after walnut leaves were sprayed with different concentration of natural brassinolide, leaf water content, relative water content, free water content and critical saturation deficit were increased. Natural saturation deficit, the degree of water requirement, the rate of transpiration, cell membrane penetration and injury rate were decreased, and chlorophyll content and the rate of photosynthesis were raised. The effect of 0.30 mg·L-1 on walnut among the different concentrations of the natural brassinolide was the most obvious. Compared with control, leaf water content, relative water content, free water content and critical saturation deficit were increased by 9.6 %, 16.1% , 7.9% and 26.8% respectively. The natural saturation deficit and the degree of water requirement were reduced by 9.0% and 24.5% . The rate of transpiration at 1 : 30 p.m. was cut down by 32.7%. The cell membrane penetration and injury rate were dropped by 2.5% and 7.1%. Total chlorophyll content and the rate of photosynthesis were increased by 310.3% and 444.9%.

关 键 词：天然油菜素内酯 核桃 叶片水分 光合速率 影响因素 

分 类 号：S664.1[农业科学—果树学]