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内共生菌Rickettsia对烟粉虱生物学特性的影响
Effects of Rickettsia infection on the ecological characteristics of whitefly Bemisia tabaci
王紫淇;刘 媛;师沛琼;安 璇;邱宝利
点击:216次 下载:15次
DOI:10.7679/j.issn.2095-1353.2020.095
作者单位:广东省生物农药创制与应用重点实验室 ; 生物防治教育部工程研究中心 ; 广东海洋大学农学院 ; 岭南现代农业科学与技术广东省实验室茂名分中心
中文关键词:烟粉虱;共生菌;Rickettsia;发育历期;繁殖力;存活率
英文关键词:Bemisia tabaci; symbiotic bacteria; Rickettsia; developmental duration; fecundity; survival rate
中文摘要:

【目的】 阐明ADDIN CNKISM.UserStyle次生共生菌Rickettsia对烟粉虱生物学特性的影响。【方法】 Rickettsia阳性(B+)和阴性(B)的烟粉虱在Rickettsia阳性棉花(C+)和阴性棉花(C)上取食15 d,调查不同处理组烟粉虱的单雌产卵量、发育历期、存活率、成虫寿命以及F1代雌雄比。【结果】 (1)Rickettsia与烟粉虱共生可显著缩短烟粉虱的发育历期,B+C+及B+C两处理组烟粉虱卵-成虫的世代发育历期均短于BC+及BC两处理组。(2)Rickettsia可以提高烟粉虱各龄期的存活率,B+C+、B+C、BC+、BC各处理组烟粉虱世代存活率依次呈下降趋势。(3)Rickettsia对烟粉虱种群的雌雄比也有重要的影响,BC+和BC处理组中烟粉虱种群雌性比显著小于B+C+和B+C烟粉虱处理组。(4)Rickettsia可以影响烟粉虱成虫的寿命及繁殖力,Rickettsia阳性烟粉虱处理组成虫寿命及平均单雌产卵量显著高于阴性处理组。【结论】 Rickettsia与烟粉虱共生以及Rickettsia在棉花植株中的存留对烟粉虱的发育、存活以及成虫雌性比、寿命和繁殖力都有有利影响,且Rickettsia与烟粉虱共生时对烟粉虱的影响力度要明显强于Rickettsia存留于棉花植株中时对烟粉虱产生的影响。


英文摘要:
[Objectives]  To elucidate the effects of infection with the secondary symbiotic bacteria Rickettsia on the ecological characteristics of whitefly Bemisia tabaci. [Methods]  Cotton was selected as the experimental plant. Rickettsia- positive (B+) and negative B. tabaci (B) were allowed to feed on plants for 15 d. Plants on which Binsects had fed were regarded as Rickettsia persistent plants (C+) and those on which B– insects had fed were regarded as Rickettsia-free plants (C). The developmental time and survival rate of B. tabaci nymphs feeding on these two types of cotton plants, and their subsequent fecundity and longevity as adults, was quantified and compared. [Results]  Rickettsia can significantly shorten the developmental time of B. tabaci. The generational time of the B+C+ and B+C treatment groups was around 17-18d, whereas that of the BC+ and BC treatment groups was around 21-23 d. Rickettsia can also significantly increase the survival of B. tabaci; survival rates from egg to adult of the B+C+, B+C, BC+ and BC treatment groups were 75.00%, 70.00%, 56.67% and 41.67%, respectively. Rickettsia also significantly increases the number of female offspring produced by B. tabaci. The number of female offspring produced by the BC– and BCtreatment groups was significantly lower than that produced by the B+Cand B+C– treatment groups. Furthermore, Rickettsia also affects the longevity and fecundity of B. tabaci. The longevity and average fecundity per female of the B+C+, B+C treatment groups were significantly greater than those of the BC and BC+ treatment groups. [Conclusion]  The symbiosis of Rickettsia in B. tabaci, and the persistence of Rickettsia in cotton plants, benefit the development and survival of whitefly nymphs, increase the number of female offspring produced and improve the longevity and reproduction of whitefly adults. In terms of its influence on B. tabaci biology, the symbiosis between Rickettsia and B. tabaci is more important than the persistence of Rickettsia in cotton plants.
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