猕猴桃根癌病病原与发病规律研究

Studies on the Pathogen and Pathogenesis Regularity of Root Cancer in Kiwifruit

本文分离和培养了猕猴桃根癌病的病原菌 ;研究和观察了病原菌的生理生化特性和病原菌的形态 ;调查了猕猴桃根癌病的发生与树龄、土壤、品种和管理水平的关系。结果表明猕猴桃根癌病的病原菌为根癌土壤杆菌 (Agrobacteriumtumefaciens)。病害在碱性和粘重的土壤中发生严重 ,在酸性土壤中不发病。管理水平高的栽培园病害发生轻 ,管理水平低。

This paper deals with isolation and cultivation of the pathogen of crown gall in kiwifruit, and studies the morphological, physiological, biochemical and serological characteristics of the pathogen. The relationship between occurrence of the disease and the ages of tree, soil, cultivars and the lever of management is investigated. The results show that the pathogen of crown gall is Agrobacterium tumefaciens , and the occurrence of the disease is severer in alkaline soil and clay than in acid soil, and severer in bad managed orchard than well managed orchard.