| 三种环境因子对大白菜软腐欧氏杆菌根毛吸附的影响 |
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| 引用本文： | 董汉松,王金生.三种环境因子对大白菜软腐欧氏杆菌根毛吸附的影响[J].植物病理学报,1992,22(4):313-317. |
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| 作者姓名： | 董汉松 王金生 |
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| 作者单位： | 1. 山东农业大学植保系;2. 南京农业大学植保系 |
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| 基金项目： | 国家自然科学基金资助课题 |
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| 摘 要： | 温度、pH和离子条件是影响病原细菌对寄主吸附的基本因子,文章测定了它们对大白菜软腐欧氏杆菌(Erwinia carotovora pv.carotoyora)在寄主根毛上吸附的影响。病菌在5个给定温度下对寄主根毛吸附量的变化,呈现为由吸附起始温度(18℃)、温度稳恒渐近范围(18-22℃)和温度饱和点(22℃)组成的吸附动力曲线。病菌在12个pH梯度下的运动状态、生活力及对寄主根毛吸附量的变化表明,病菌吸附以pH5.8-7.2为适宜范围,pH4.6和8.2为低限和高限;偏酸(pH5.0以下)和偏碱(pH7.2以上)可通过影响病菌的生活力和运动性而影响吸附。5×10-6M的Ca++可使病菌吸附量提高2.5-4.2倍,同浓度的Mg++可使吸附量提高2.7倍。文章讨论了温度和pH条件影响吸附的动力学,以及吸附调节的可能机制。
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| 关 键 词： | 大白菜 软腐欧氏杆菌 软腐病 |
INFLUENCE OF ENVIRONMENTAL FACTORS ON ATTACHENT OF ERWINIA CAROTOVORA SUBSP.CAROTOVORA TO CHINESE CABBAGE ROOT HAIRS |
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| Dong Hansong,Wang Jinsheng,Fang Zhongda.INFLUENCE OF ENVIRONMENTAL FACTORS ON ATTACHENT OF ERWINIA CAROTOVORA SUBSP.CAROTOVORA TO CHINESE CABBAGE ROOT HAIRS[J].Acta Phytopathologica Sinica,1992,22(4):313-317. |
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| Authors: | Dong Hansong Wang Jinsheng Fang Zhongda |
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| Institution: | 1. Department of Plant Protection, Shandong Agricultural University;2. Department of Plant Protection, Nanjing Agricultural University |
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| Abstract: | A dynamic curve of attachment was composed from the quantitative change of bacterial numbers Pathogen attached to Brassica campestris subsp.pekinesis under 5 temperature gradients it indicated that initiation point of attachment was 18℃,asymptote began from 18℃ and saturation point of atta chment was 22℃.Pacterial attachment to root hairs under 4 pH and survival ability of Erwinia carotovora subsp.carotovora under 12 pH were also examined.Results showed that pH5.8-7.2 was a suitable range for bacterial attachment.Conditions below pH5.0 and above pH8.2 could affect bacterial survival ability and mobility,and hence bacterial attachment.The existance of 5×10-6 M Ca++ and Mg++ increased amount of bacterial attachment for 2.5 to 4.2times.The influence of temperature and pH conditions on attachment dynamics and possible regulation mechanisms of soft-rot pathogen attachment to chinese cabbage were discussed. |
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