摘要
在北京,对于秋播的马铃薯接种 Y 病毒并不显著增加感染率和花叶型退化程度。在春播的条件下无病毒的实生苗后代植株一季内大多数自然感染 Y 病毒。盆栽试验证明降低夜间气温和土温、降低昼夜土温或仅降低夜间土温都有效地降低了春播马铃薯在自然和人工接种条件下 Y 病毒感染率。接种后1、3、5星期的检验结果表示,降低土温大大延缓了叶片内 Y 病毒的发展。因此推想,低温除了其他有利作用之外,会增强马铃薯对于 Y 病毒的抗扩展免疫性。
In Peking,inoculation of autumn-sown field plants of potatoes with Y virus did notsignificantly increase the percentage of Y virus infection in the harvested tubers.Underspring-sown conditions,however,most of the virus-free plants derived from seedlings becamenaturally infected with Y virus within one season.Experiments with potted plants demonstrated that lowering of night air and soil tempera-ture,of day and night soil temperature,or of only night soil temperature effectively checkedY virus infection in the spring-sown potato crop,either artificially inoculated or exposed tonatural infection.Assay made one,three,and five weeks after inoculation showed that lower-ing of soil temperature greatly retarded the development of Y virus in potato leaves.
出处
《植物病理学报》
CAS
1965年第1期53-56,共4页
Acta Phytopathologica Sinica
