Cold tolerance of European populations of Drosophila suzukii varies among seasonal phenotypes

IF 2.9 2区 生物学 Q2 BIOLOGY
Madelena De Ro , Tom Devos , Nick Berkvens , Hans Casteels , Jochem Bonte , Hervé Colinet , Patrick De Clercq
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引用次数: 0

Abstract

The invasive Asian fruit fly Drosophila suzukii is a significant pest of soft and stone fruits in large parts of the world, including Europe. Understanding its performance at low temperatures is crucial for establishing sustainable management programs. In this paper, we compared the cold tolerance of summer-acclimated (developed at 25 °C, 16:8 h (L:D)) and winter-acclimated (developed at 10 °C, 8:16 h (L:D)) males and females of one Southern European (Spanish) and two northern European (Belgian) populations by means of two common indices: (1) the lower lethal temperature (LLTemp) and (2) the lower lethal time (LLtime). Winter-acclimated D. suzukii adults proved to be substantially more cold tolerant than summer-acclimated adults. Their LLtime50 values were significantly longer than those of summer-acclimated flies and this was the case for all tested temperatures. Winter-like acclimation also resulted in more negative LLTemp values. Non-uniform differences in cold susceptibility between males and females were found, depending on the exposure conditions and the treatment groups. Variations in cold tolerance among Belgian and Spanish populations were observed too, albeit these were more likely ascribed to variations among individuals than to variations due to geographic origin and adaption. Overall, our results indicate that phenotypic plasticity in the field can strongly increase the low temperature performance of D. suzukii, thereby facilitating its overwintering success in temperate climates.
欧洲铃木果蝇种群的耐寒性随季节表型而变化
入侵的亚洲果蝇铃木果蝇是包括欧洲在内的世界大部分地区软果和核果的重要害虫。了解其在低温下的表现对于建立可持续的管理计划至关重要。本文采用较低致死温度(LLTemp)和较低致死时间(LLtime)两种常见指标,比较了一个南欧种群(西班牙)和两个北欧种群(比利时)夏季驯化种群(25°C, 16:8 h (L:D))和冬季驯化种群(10°C, 8:16 h (L:D))雄性和雌性的耐寒性。经证明,冬季驯化的铃木夜蛾成虫比夏季驯化的成虫具有更强的耐寒性。它们的LLtime50值明显长于适应夏季的果蝇,并且在所有测试温度下都是如此。类冬驯化也导致更多的负LLTemp值。根据暴露条件和处理组的不同,男性和女性对寒冷的敏感性存在不均匀的差异。比利时和西班牙人群的耐寒性差异也被观察到,尽管这些差异更可能归因于个体之间的差异,而不是地理起源和适应的差异。总体而言,我们的研究结果表明,田间表型可塑性可以显著提高铃木木虱的低温性能,从而促进其在温带气候下的越冬成功。
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来源期刊
Journal of thermal biology
Journal of thermal biology 生物-动物学
CiteScore
5.30
自引率
7.40%
发文量
196
审稿时长
14.5 weeks
期刊介绍: The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are: • The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature • The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature • Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause • Effects of temperature on reproduction and development, growth, ageing and life-span • Studies on modelling heat transfer between organisms and their environment • The contributions of temperature to effects of climate change on animal species and man • Studies of conservation biology and physiology related to temperature • Behavioural and physiological regulation of body temperature including its pathophysiology and fever • Medical applications of hypo- and hyperthermia Article types: • Original articles • Review articles
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