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...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。展开更多
在马铃薯植株上接种 Y 病毒,往往经过很久时间也不出现症状。偶尔发现茎部折断的植株在新生枝上表现明显的皱缩花叶症状。遂于1964年5月10日,挑选出一批在温室3月11日播种于小盆的“男爵”健苗,进行剪顶接种试验。这批幼苗的种薯原为196...在马铃薯植株上接种 Y 病毒,往往经过很久时间也不出现症状。偶尔发现茎部折断的植株在新生枝上表现明显的皱缩花叶症状。遂于1964年5月10日,挑选出一批在温室3月11日播种于小盆的“男爵”健苗,进行剪顶接种试验。这批幼苗的种薯原为1962年黑龙江克山产并经过1963年在北京秋播繁殖的。剪顶时每株仅留下部的两片叶子。用含 Y 病毒的烟草汁液按常规方法接种其中的一片。展开更多
The plant virus diseases is a serious problem in agriculture, but so far there is no effective control method. To find a new way to control virus diseases is an imperative task of Virologists. Since 1981, we have stud...The plant virus diseases is a serious problem in agriculture, but so far there is no effective control method. To find a new way to control virus diseases is an imperative task of Virologists. Since 1981, we have studied the biological control of Blant diseases caused by cucumber mosaic virus (CMV).展开更多
It has long been known that actinomycin D (AMD) strongly inhibits DNA-dependent RNA synthesis. But there exist discrepancies of opinon or even contradictions of evidences for its effect on the replication of viruses (...It has long been known that actinomycin D (AMD) strongly inhibits DNA-dependent RNA synthesis. But there exist discrepancies of opinon or even contradictions of evidences for its effect on the replication of viruses (as well as bacteriophages) containing RNA as genome. Snger and Knight reported that TMV-RNA synthesis was not inhibited by AMD, thus they considered that the template function of DNA was not involved in the synthesis of the viral RNA.展开更多
文摘在北京,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。
文摘在马铃薯植株上接种 Y 病毒,往往经过很久时间也不出现症状。偶尔发现茎部折断的植株在新生枝上表现明显的皱缩花叶症状。遂于1964年5月10日,挑选出一批在温室3月11日播种于小盆的“男爵”健苗,进行剪顶接种试验。这批幼苗的种薯原为1962年黑龙江克山产并经过1963年在北京秋播繁殖的。剪顶时每株仅留下部的两片叶子。用含 Y 病毒的烟草汁液按常规方法接种其中的一片。
文摘The plant virus diseases is a serious problem in agriculture, but so far there is no effective control method. To find a new way to control virus diseases is an imperative task of Virologists. Since 1981, we have studied the biological control of Blant diseases caused by cucumber mosaic virus (CMV).
文摘It has long been known that actinomycin D (AMD) strongly inhibits DNA-dependent RNA synthesis. But there exist discrepancies of opinon or even contradictions of evidences for its effect on the replication of viruses (as well as bacteriophages) containing RNA as genome. Snger and Knight reported that TMV-RNA synthesis was not inhibited by AMD, thus they considered that the template function of DNA was not involved in the synthesis of the viral RNA.
