Trotta Vincenzo, Forlano Pierluigi, Falabella Patrizia, Battaglia Donatella, Fanti Paolo
Dipartimento di Scienze, Università degli Studi della Basilicata, Viale dell'Ateneo Lucano 1, 85100 Potenza, Italy.
J Therm Biol. 2018 Feb;72:53-58. doi: 10.1016/j.jtherbio.2017.12.004. Epub 2017 Dec 19.
The pea aphid Acyrthosiphon pisum is a common pest of many species of legumes and its parasitoid Aphidius ervi is regarded as a successful biocontrol agent. In this study, we report a greater survival rate of parasitized aphids compared with unparasitized ones, after exposure to a very high temperature (39°C for 30min). After the heat shock, the survival of unparasitized aphids decreases according to their age at the heat shock treatment, suggesting a different adaptation of the aphid life stage to the different microclimatic conditions they experience. Survival of parasitized aphids does not change according to the time of the heat shock treatment, but it is always significantly higher compared with the unparasitized ones. Parasitized aphids are very quickly subjected to a wide range of physiological modifications and the observed increased survival could be a consequence of these modifications before the heat shock treatment. The possible explanations as well as the possible adaptive nature of the observed phenomenon are discussed.
豌豆蚜（Acyrthosiphon pisum）是多种豆科植物的常见害虫，其寄生蜂豌豆蚜茧蜂（Aphidius ervi）被视为一种成功的生物防治剂。在本研究中，我们报告了在暴露于非常高的温度（39°C 30分钟）后，被寄生的蚜虫比未被寄生的蚜虫具有更高的存活率。热休克后，未被寄生的蚜虫的存活率根据热休克处理时的年龄而降低，这表明蚜虫的不同生命阶段对它们所经历的不同微气候条件具有不同的适应性。被寄生的蚜虫的存活率不会根据热休克处理的时间而变化，但与未被寄生的蚜虫相比总是显著更高。被寄生的蚜虫很快会经历广泛的生理变化，观察到的存活率增加可能是热休克处理前这些变化的结果。文中讨论了对观察到的现象的可能解释以及可能的适应性本质。
