State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
INRA (French National Institute for Agricultural Research), Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 06903, Sophia Antipolis, France.
Sci Rep. 2017 Jan 17;7:40754. doi: 10.1038/srep40754.
Many insects harbor heritable endosymbionts, whether obligatory or facultative, and the role of facultative endosymbionts in shaping the phenotype of these species has become increasingly important. However, little is known about whether micro-injected endosymbionts can have any effects on aphid clones, which was measured using various ecological parameters. We examined the effects between symbiotic treatments and the vital life history traits generated by Regiella insecticola on the life table parameters of Sitobion avenae. The results showed that R. insecticola can decrease the intrinsic rate of increase (r), the finite rate of increase (λ) and birth rate and can increase the mean generation times (T) of S. avenae clones, suggesting that R. insecticola may decelerate the normal development of the hosts. No significant differences of these parameters were observed between the examined Sitobion avenae clones, and the symbiont treatment by genotype interaction affected only the net reproduction rate R, pre-adult duration and total longevity but not the other parameters. Additionally, a population projection showed that R. insecticola decelerated the growth of the S. avenae clones. The evocable effects of R. insecticola on the S. avenae clones may have significant ramifications for the control of S. avenae populations under field/natural conditions.
许多昆虫都携带有可遗传的内共生体，无论是必需的还是兼性的，兼性内共生体在塑造这些物种的表型方面的作用变得越来越重要。然而，对于内共生体是否可以通过各种生态参数对蚜虫克隆体产生任何影响，人们知之甚少。我们研究了共生处理之间的关系以及Regiella insecticola 对禾谷缢管蚜生命表参数产生的重要生活史特征的影响。结果表明，R. insecticola 可以降低内禀增长率 (r)、有限增长率 (λ) 和出生率，并可以增加禾谷缢管蚜克隆体的平均世代时间 (T)，这表明 R. insecticola 可能会减缓宿主的正常发育。在被检查的禾谷缢管蚜克隆体之间，这些参数没有观察到显著差异，共生体处理与基因型的相互作用仅影响净生殖率 R、幼期持续时间和总寿命，而不影响其他参数。此外，种群预测表明，R. insecticola 减缓了禾谷缢管蚜克隆体的生长。R. insecticola 对禾谷缢管蚜克隆体的可诱导影响可能对田间/自然条件下禾谷缢管蚜种群的控制具有重要意义。
