B型烟粉虱取食诱导烟草对烟蚜防御反应的时间效应

摘要/Abstract

摘要： 为了明确B型烟粉虱Bemisia tabaci取食诱导烟草对烟蚜Myzus persicae的防御反应和时间效应，探讨外来入侵害虫B型烟粉虱取食诱导的烟草防御反应在其与桃蚜种间竞争中的作用,本研究采用小叶笼法和生化分析法，分别研究了B型烟粉虱取食诱导烟草对烟蚜生长发育的影响和烟草主要营养指标的变化。结果表明：B型烟粉虱取食诱导的烟草可对烟蚜产生明显的防御反应，对烟蚜的存活和生长发育有显著的抑制作用和时间效应。在烟粉虱若虫危害烟草至第5天，烟草系统白脉叶片上烟蚜的死亡率较对照叶片上烟蚜的死亡率升高36.13%；至第10天死亡率升高72.78%，且平均相对生长率较对照显著降低；至第15天死亡率升高仍达58.89%。在烟粉虱若虫危害至第10天时，将处理植株上的烟粉虱的若虫虫体去除，然后在烟草系统白脉叶片上接烟蚜1龄若蚜，在去虫后15 d内，烟草系统白脉叶片对烟蚜死亡率及相对生长率的影响较不去虫的对照间均有明显差异（P<0.05）。但至去虫后第20天，对烟蚜的不利影响即消失。研究表明B型烟粉虱取食诱导的烟草系统白脉叶片对烟蚜的抗性能持续表达15 d左右。烟粉虱危害后的局部带虫叶片与对照相比，对烟蚜的生长发育没有明显的不利影响。B型烟粉虱危害的烟草，其可溶性糖和可溶性蛋白的含量降低，这与烟蚜的死亡率表现出显著的负相关性。

关键词: B型烟粉虱, 烟蚜, 诱导抗性, 烟草, 时间效应, 生长发育, 营养指标

Abstract: To determine the defense responses of tobacco plants to Myzus persicae induced by Bemisia tabaci B biotype and their temporal effect and explore their role in interspecific competition between B. tabaci and M. persicae, we investigated the effect of tobacco defense responses induced by B. tabaci on the development of M. persicae with the method of clip-cage. Moreover, the changes of major nutritional indices in tobacco plants preinfested by B. tabaci were also studied using biochemical analysis. The results showed that B. tabaci B biotype could induce the defense responses of tobacco plants to M. persicae distinctly. These responses inhibited the survival and development of M. persicae significantly and had distinct temporal effects. The mortalities of M. persicae fed on systemic white-vein leaves preinfested by B. tabaci nymphs for 5 d were 36.13% higher than those on the control leaves. After infestation by B. tabaci nymphs for 10 d, the mortalities of M. persicae were 72.78% higher than those on the control leaves, and the average relative growth rates were reduced significantly compared with the control. After infestation by B. tabaci nymphs for 15 d, the mortalities were still 58.89% higher than those on the control plants. On the 10th day of the infestation by B. tabaci nymphs, B. tabaci nymphs fed on treated plants were wiped off, and then the 1st nymphs of M. persicae were placed on the white-vein leaves. After that, they were clip-caged immediately. Significant differences in the mortalities and relative growth rates of M. persicae were found between the systemic white-vein leaves of control plants and the leaves of treated plants within 15 days after removing B. tabaci nymphs（P<0.05）. But the differences were no longer found on the 20th day after removing B. tabaci nymphs. The results suggest that the defense responses of the systemic white-vein leaves of tobacco plants induced by B. tabaci should continue being expressed for about 15 d. The damaged leaves preinfested by B. tabaci have no significant negative influence on the mortalities and relative growth rates of M. persicae compared with the control leaves. Both soluble sugar and soluble protein contents are reduced in the systemic white-vein leaves preinfested by B. tabcai B biotype, which have distinct negative correlation with the mortalities of M. persicae.

Key words: Bemisia tabcai B biotype, Myzus persicae, tobacco, induced resistance, temporal effect, development, nutritional indices

王承香，薛明，毕明娟，李庆亮，胡海燕. B型烟粉虱取食诱导烟草对烟蚜防御反应的时间效应[J]. , 2010, 53(3): 314-322.

WANG Cheng-Xiang, XUE Ming, BI Ming-Juan, LI Qing-Liang, HU Hai-Yan. Temporal effect of tobacco defense responses to Myzus persicae （Sulzer）（Homoptera: Aphididae） induced by Bemisia tabaci （Gennadius）（Homoptera: Aleyrodidae） B biotype[J]. , 2010, 53(3): 314-322.

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http://www.insect.org.cn/CN/Y2010/V53/I3/314

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