华南农业大学学报2012，Vol.33Issue(3)：336-341,6.
水稻白叶枯病对自然发病水稻光合作用的影响
Effects of Rice Bacterial Blight on Photosynthesis in Naturally Infected Rice
摘要
Abstract
Daily dynamics of photosynthetic characteristics in rice leaves infected by Xanthomonas oryzae pv. oryzae were analyzed by using the LJ-6400 portable photosynthesis system. The results showed that diurnal changes of photosynthesis (Pn) in rice flag leaves had one peak, and there was no obvious midday depression in daytime. The phenomenon was possibly related to rice growth period and geographical environment conditions. Although no significant difference was observed in Pn and Tr between infected plants and the control, they were very different in the curves of diurnal variation. Correlation analysis showed that the main factors affecting Pn of infected plants were Gs and PAR. Compared with the control, stomatal characteristics changed more significandy in the infected plants. Length and width of the stoma increased, whereas the density decreased. Stoma distribution in flag leaves was not homogeneous in diseased plants. There were significant differences between infected plants and the control in chlorophyll and carotenoid. Chi a and carotenoid were higher in the control but Chi b was higher in infected plants by significance analysis. Rice showed strong adaptability and resistant ability when it was influenced by the pathogen. Rice growed under the stress of plant disease by changing structure, performance and metabolic way.关键词
水稻白叶枯病/净光合速率/蒸腾速率/气孔特征/叶绿素Key words
rice bacterial blight/ net photosynthesis rate/ transpiration rate/ stomatal characteristics/ chlorophyll分类
农业科技引用本文复制引用
陈小龙,高玲玲,余磊,董闯,蒋涛,黄琼..水稻白叶枯病对自然发病水稻光合作用的影响[J].华南农业大学学报,2012,33(3):336-341,6.基金项目
农业部公益性(农业)行业科研专项(nyhyzx07-056) （农业）
