斑驳病毒对‘牛尾’山药叶片光合作用的影响  

Effects of Yam Mottle Virus Disease on Photosynthesis of Dioscorea opposita‘Niuwei’Leaves

作　　者：徐馨蕾 施令祥 段延碧[3] 龙雯虹[1] XU Xinlei;SHI Lingxiang;DUAN Yanbi;LONG Wenhong(College of Landscape and Horticulture,Yunnan Agricultural University,Kunming 650201,China;Station of Cash Crop at Fuyuan County in Qujing City,Fuyuan 655500,Yunnan,China;Agricultural Teaching Experiment Center,Yunnan Agricultural University,Kunming 650201,China)

机构地区：[1]云南农业大学园林园艺学院,昆明650201 [2]曲靖市富源县经济作物技术推广站,云南富源655500 [3]云南农业大学农科教学实验中心,昆明650201

出　　处：《热带亚热带植物学报》2023年第4期566-572,共7页Journal of Tropical and Subtropical Botany

基　　金：校企合作项目(KX142020067)资助。

摘　　要：为了解斑驳病毒对‘牛尾’山药叶片光合作用的影响,对不同病害程度的‘牛尾’山药叶片的叶绿素和光合日变化进行了测定。结果表明,轻病植株的叶片叶绿素a和总叶绿素显著低于健康植株,重病植株的叶绿素b和类胡萝卜素也较健康植株低,但轻病植株与健康植株间无显著差异。斑驳病毒侵染山药后,轻病和重病植株的净光合速率、气孔导度、蒸腾速率均低于健康植株,但胞间CO_(2)浓度与健康植株间无显著差异。这表明山药感染斑驳病毒后光合效率下降,从而导致生理机能受到影响。In order to understand the effect of mottle virus on the photosynthesis of yam(Dioscorea opposite)‘Niuwei’,the diurnal changes in chlorophyll and photosynthesis in leaves with different degrees of mottle virus disease were measured.The results showed that the contents of chlorophyll a and total chlorophyll of mildly infected plants were significantly lower than those of healthy plants,and the contents of chlorophyll b and carotenoids of seriously infected plants were also lower than those of healthy plants,but there was no significant difference in chlorophyll b and carotenoids between mildly infected plants and healthy plants.After mottle virus infected yam,the net photosynthetic rate,stomatal conductance and transpiration rate of mildly and seriously infected plants were also lower than those of healthy plants,but the intercellular CO_(2) concentration had not significant difference from that of healthy plants.Therefore,it was indicated that the photosynthetic efficiency of yam decreased after infected with mottled virus,thus causing the physiological function to be affected.

关 键 词：山药 斑驳病毒病 叶绿素 光合特性 

分 类 号：S632.1[农业科学—蔬菜学]