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灰霉病菌侵染对黄瓜叶片光合作用和PSII光化学活性的影响

发表时间:2010-04-15  浏览量:1579  下载量:705
全部作者: 贾裕娇,高辉远,王维斌,张子山,孟庆伟
作者单位: 山东农业大学生命科学学院,作物生物学国家重点实验室
摘 要: 通过气体交换与快速叶绿素荧光分析方法研究感染灰霉病菌后的黄瓜叶片光合活性和光合机构的变化。结果表明:感病后光合速率(Pn)、气孔导度(Gs)降低,而胞间CO2浓度(Ci)升高,说明黄瓜遭受灰霉菌侵染后光合速率的下降是叶肉细胞光合活性下降引起的。快速叶绿素荧光诱导动力学分析表明:感病后,黄瓜叶片光合机构电子传递受阻,放氧复合体(oxygen evolving complexes,OEC)受到伤害,这是造成PSⅡ光化学活性下降的主要原因,也是引起黄瓜叶片光合能力下降的原因之一。
关 键 词: 植物学;黄瓜;灰霉菌;光合作用;PSⅡ光化学活性;放氧复合体
Title: Effect of Botrytis cinrea infection on photosynthesis and PSⅡ photochemical activity in leaves of cucumber
Author: JIA Yujiao, GAO Huiyuan, WANG Weibin, ZHANG Zishan, MENG Qingwei
Organization: State Key Lab of Crop Biology, College of Life Sciences, Shandong Agricultural University
Abstract: Effect of Botrytis cinrea infection on photosynthetic activities and photosynthetic apparatus in leaves of cucumber infected by B. cinrea were studied by measurements of gas exchange and analysis of the fast polyphasic chlorophyll fluorescence transient. The photosynthetic rate (Pn) and stomatal conductance (Gs) decreased and intercellular CO2 concentration (Ci) increased. So the decrease of the photosynthetic rate was because of the decrease of photosynthetic activities in mesophyllic cells. The electron transport of photosynthetic apparatus was blocked and oxygen evolving complexes are injured by the analysis of the fast polyphasic chlorophyll fluorescence transient. The decline of PSⅡ photochemistry activities was mainly due to the blocked electron transport and injury of the oxygen evolving complexes (OEC). Also, the blocked electron transport and injury of the oxygen evolving complexes were one of the causes that induced the decrease of photodynthetic capacity in leaves of cucumber.
Key words: botany; cucumber; Botrytis cinrea; photosynthesis; PSⅡ photochemical activity; oxygen evolving complex
发表期数: 2010年4月第7期
引用格式: 贾裕娇,高辉远,王维斌,等. 灰霉病菌侵染对黄瓜叶片光合作用和PSII光化学活性的影响[J]. 中国科技论文在线精品论文,2010,3(7):729-734.
 
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