Insecticide resistance and nutrition interactively shape life-history parameters in German cockroaches.
Insecticide resistance and nutrition interactively shape life-history parameters in German cockroaches.
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DOI：
10.1038/srep28731
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发表时间：
2016-06-27
影响因子：
4.6
通讯作者：
Silverman J
中科院分区：
文献类型：
--
作者：
Jensen K;Ko AE;Schal C;Silverman J
据报道，在许多昆虫物种中，进化的杀虫剂抗性与适应相关的代价，但进化适应杀虫剂压力和变化的环境条件之间的相互作用几乎没有受到关注。我们从三只德国小蠊(Blattella germanica L.)对杀虫剂抗性不同的种群，在整个发育过程中要么营养丰富，要么营养不良(稀释)。一个种群是对杀虫剂敏感的实验室菌株；另外两个种群来自野外收集的抗吲哚杀威种群，在收集后，无论是否进一步选择吲哚杀威，该种群都保持不变。然后，我们测量了发育时间、成人期存活时间、成人体大小，以及使用吲哚抗坏血酸挑战的结果。我们的结果表明，对吲哚杀威的抗性和不良的营养条件增加了发育时间，降低了成虫的体型，并加强了交互作用。我们还发现，在选择吲哚杀威的种群中，成虫期的存活率较低，营养不良加剧了这一点。此外，营养对吲哚杀威的敏感性有极显著的影响。这项研究举例说明了不良的营养条件如何加剧抗药性的生活史成本，并增加杀虫剂暴露的有害影响，展示了环境条件和抗药性可能如何交互影响个人健康和杀虫剂效力。
Fitness-related costs of evolving insecticide resistance have been reported in a number of insect species, but the interplay between evolutionary adaptation to insecticide pressure and variable environmental conditions has received little attention. We provisioned nymphs from three German cockroach (Blattella germanica L.) populations, which differed in insecticide resistance, with either nutritionally rich or poor (diluted) diet throughout their development. One population was an insecticide-susceptible laboratory strain; the other two populations originated from a field-collected indoxacarb-resistant population, which upon collection was maintained either with or without further selection with indoxacarb. We then measured development time, survival to the adult stage, adult body size, and results of a challenge with indoxacarb. Our results show that indoxacarb resistance and poor nutritional condition increased development time and lowered adult body size, with reinforcing interactions. We also found lower survival to the adult stage in the indoxacarb-selected population, which was exacerbated by poor nutrition. In addition, nutrition imparted a highly significant effect on indoxacarb susceptibility. This study exemplifies how poor nutritional condition can aggravate the life-history costs of resistance and elevate the detrimental effects of insecticide exposure, demonstrating how environmental conditions and resistance may interactively impact individual fitness and insecticide efficacy.