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使用CI-310便携式光合作用测定系统研究了美洲斑潜蝇幼虫为害对几种作物光合作用的影响。结果表明,随着叶面积受害级别的增高,蓖麻和菜豆的光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)和气孔限制值(Ls)总体呈下降趋势,不同受害级别与胞间CO2浓度(Ci)的变化呈正相关。美洲斑潜蝇幼虫潜食蓖麻和黄瓜叶片中的栅栏组织后,叶片中叶绿素a、b和叶绿素总量都较对照减少,并且随着潜食级别的增高,减少量逐渐增大。叶面积受害级别与叶片的叶绿素总量之间呈高度负相关,其相关系数分别为r=-0.93(蓖麻)和r=-0.95(黄瓜)。菜豆、黄瓜和丝瓜的叶肉被害后,不同受害级别叶片的鲜重变化无规律性。
The CI-310 portable photosynthesis system was used to study the effects of Liriomyza sativae larvae on the photosynthesis of several crops. The results showed that the photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr) and stomatal limitation (Ls) of Castor bean and Brassica campestris decreased with the increasing of leaf damage level. And intercellular CO2 concentration (Ci) changes were positively correlated. The total chlorophyll a, b and chlorophyll in leaves of the latent leaf castor and cucumber leaves were decreased compared with the control, and the decrease gradually increased with the increasing of the level of the latent food. There was a highly negative correlation between leaf damage level and total chlorophyll content, with correlation coefficient of r = -0.93 (ricinus) and r = -0.95 (cucumber), respectively. Beans, cucumber and sponge gourd leaf damage, the different levels of injury leaves fresh weight irregularity.