芜菁花叶病毒对油菜的侵染性和在体内的分布运转规律

芜菁花叶病毒在油菜不同生育阶段的侵染性有很大差异,以苗期最易被侵染,而成株期抗侵染能力很强。随着植株生育进程,病毒含量由低到高,并分布于各器官。病毒的增殖和运转与植株体内营养物质的积累和运输密切相关。病毒在植株体内的垂直分布情况,随着植株的生长发育,病毒有由下向上输送的趋势。根据病毒的侵染、增殖和运转规律,对防治工作有一定指导意义。

INFECTIVITY,DISTRIBUTION, AND TRANSPORT REGULARITY OF TuMV IN RAPESESD

The infectivity of TuMV in each growing stage of rapeseed had grsatly different,especially,rape in seedling stage was infected easily but it in adult stage had very strong anti-infected ability.The virus content in plant increased following the growth of plants,and it spreads to every organs of plants,The propagation and transport of virus closely relate to the accumulation and transport of nutritive substance in plant,The regularity of infection and propagation and transport of virus is significantly inportant to the direction of control work.