| 摘要: |
| 1980至1982年的试验结果表明,北京郊区番茄抹上主要病毒类型是烟草花叶病毒(TMV),其次为黄瓜花叶病毒(CMV),以及部分由它们的复合侵染所造成的花叶、厥叶和茎坏死条斑等症状,其中以 TMV 起主导作用,它占总病毒数的50%以上。用测定 TMV 浓度的增量来估计不同组合接种的作用可以看出,单独侵染 TMV 的呈现系统花叶症、疱斑和部分叶片畸形;混合侵染的则表现一般:重复侵染的比前两种处理的症状表见更轻些,而单独侵染 CMV 的症状则表现最轻。不同方式组合的TMV 枯斑数量测定结果也同上述症状表现一致。症状的轻重与枯斑数量的多少成正比。单独侵染 TMV 的不同稀释度(5 mg/ml)的枯斑数量,比两种复合侵染的多。用数学方法所得 TMV 的致病性稀释曲线图同上述结果一致。由于复合侵染中CMV 对 TMV 浓度的增量产生一定的抑制作用,因此,在症状的表现上和枯斑数量也相应减轻和减少。 |
| 关键词: 致病性 烟草花叶病毒 数学方法 番茄病毒病 混合接种 混合侵染 黄瓜花叶病毒 复合侵染 枯斑 重复侵染 |
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| COMPARISON OF VIRUS CONCENTRATION AND PATHOGENICITY IN TOMATO LEAVES AFTER INOCULATING WITH TMV,CMV,TMV+CMV AND CMV FOLLOWED BY TMV |
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| Abstract: |
| TMV and CMV have been demonstrated to be the major virus entities prevailing in tomato plants in the area of Beijing.54.7% of plants were infected with TMT alone,24.5% with CMV alone,while the remaining 20.8% were infected with a mixed infection of TMV and CMV. Inoculations with TMV(alone),CMV(alone),TMV+CMV(mixed) and CMV followed by TMV were carried out.The severity of symptoms had been recorded and the concentration of TMV in each case was determined by either necrotic spot count or by purification and d... |
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