紫斑牡丹褐斑病侵染对叶片光合作用的影响  

Effect on Leaf Photosynthesis of Paeonia rockii Infected by Cercospora variicolor

作　　者：李仲芳[1] 范晶[2] 高彦明[3] 王瑛[4] 王文妮[4] 

机构地区：[1]天水师范学院生物工程与技术学院甘肃省高校农业微生物重点实验室,甘肃天水741001 [2]乐山师范学院生命科学学院,四川乐山614000 [3]天水市林业局,甘肃天水741000 [4]天水市秦州区林业局,甘肃天水741000

出　　处：《甘肃林业科技》2015年第4期16-18,共3页Journal of Gansu Forestry Science and Technology

基　　金：甘肃省高校农业微生物重点实验室项目(项目编号:AM1501)

摘　　要：本研究以紫斑牡丹"玫瑰红"为试验材料,观察发现其褐斑病是由芍药杂色尾孢霉侵染所致。5月初芍药杂色尾孢霉开始侵染牡丹叶片,形成大小不同的褐色病斑,8月病害趋于严重,并造成紫斑牡丹叶片的焦枯、死亡。受到芍药杂色尾孢霉侵染后,紫斑牡丹叶片的净光合速率、气孔导度、蒸腾速率和叶绿素含量均下降,而细胞间隙CO_2浓度升高,叶绿素降解加快或合成受阻,从而影响到光合作用。By using Paeonia rockii ‘Mei Gui Hong' as the experimental material, we found that its peonyleaf spot was caused by the infection of Cercospora variicolor Winter. C. variicolor infects Paeonia leaves, forming different sizes of brown disease spots in early May, and further causes leaves' withering and death in August. When infected by C. variicolor, the leaf's net photosynthetic rate, transpiration rate, stomatal conductance and chlorophyll content are all decreased, and the leaf's intercellular CO_2 concentration is increased, so the infection of C. variicolor, maybe affect the photosynthesis by speeding up degradation or inhibiting synthetic in the infected P. rockii leaves' chlorophyll.

关 键 词：紫斑牡丹 芍药杂色尾孢霉 光合特性 

分 类 号：S436.8[农业科学—农业昆虫与害虫防治]