摘要
为探讨叶、果水势和叶片光合指标对黄金梨果实黄顶病发生的影响机理,对历年来发病较重植株(B)和较轻植株(A)的叶、果水势差和叶片的部分光合指标进行了测定比较研究。结果表明:在黄金梨果实的发育过程中,无论发病轻、重的黄金梨树,其果实的水势始终高于叶片,但发病重的叶片水势较低,叶、果水势差较大;处理A叶片和果实的水势差值始终极显著小于处理B;处理A的叶片净光合速率、水分利用效率和羧化效率始终高于处理B。相关性分析结果显示,发病轻处理的叶、果水势差异与果实发病率呈极显著相关(r=0.9153)。而发病重处理的叶、果水势差异与果实发病率呈显著相关(r=0.641)。叶片和果实水势差的大小与果实发病率呈显著正相关(r=0.6339);2个处理的净光合速率、水分利用效率和羧化效率与果实发病率均呈极显著负相关,相关系数分别为r=-0.9579、r=-0.9644和r=-0.9243。
Pear trees（B） that suffered Huangding disease seriously and trees（A） that suffered the disease slightly were used to explore the effects of leaf and fruit water potential and photosynthetic traits on＂Huangding disease＂of Whangkeumbae fruit.The results showed that the fruit water potential was always higher than that of the leaf in the process of fruit growth on the condition that Whangkeumbae suffered the disease slightly or seriously.The water potential of seriously-ill leaf was low and the difference of its leaf and fruit water potential was comparatively big.The difference of trees（A） was always smaller than that of trees（B）.The net photosynthetic rate,water use efficiency and carboxylation efficiency of trees（A） were always higher than of trees（B）.The relative analysis reveals that the treating of lightly-ill leaf and fruit were clearly related（r=0.9153） and the treating of seriously-ill leaf and fruit were clearly related（r=0.641）.The difference between water potential of leaf and fruits and fruits disease rate was sharply positive（r = 0.6339）.The difference of the net photosynthetic rate,water use efficiency and carboxylation efficiency that affect the fruit disease rate was negative（r=-0.9579,r=-0.9644 and r=-0.9243 respectively）.
出处
《北方园艺》
CAS
北大核心
2011年第4期29-32,共4页
Northern Horticulture
基金
国家现代农业(梨)产业技术体系建设专项资金资助项目(nycytx-29-06)
关键词
黄金梨
黄顶病
水势
净光合速率
水分利用效率
Whangkeumbae
fruits Huangding disease
water potential
net photosynthetic rate
water use efficiency
