摘要
泡桐感染丛枝病后,其生理及叶片微观构造均发生明显变化。丛枝小叶的变化最为显著,叶片变薄,叶面角质层变薄;蒸腾速率增高(丛枝小叶的为0.0116molm^(-2)s^(-1);健康树及病树正常叶的分别为0.0030、0.0029mol m^(-2)s^(-1));净光合速率降低,但病树正常叶的净光合速率明显低于丛枝小叶(分别为3.72和5.87p.mol m^(-2)s^(-1))。
The paulownia physiology and leaf microstructure were chang- ed apparently after witches'—broom infection,the little leaf and its cuticle in witches'—brooms become thinner,the transpiration rate increased(0.0116 mol m^(-2)s^(-1)),the normal leaves in infected and sound trees are 0.0030 and 0.0029mol m^(-2)s^(-1) respectively.However, the net photosynthetic rate(NPR) decreased,the NPR of normal leaf in infected trees is lower than that of wi- tches'—broom leaf(3.72 and 5.87 μmol m^(-2)s^(-1))。
出处
《陕西林业科技》
北大核心
1991年第2期68-70,共3页
Shaanxi Forest Science and Technology
