Differential wing polyphenism adaptation across life stages under extreme high temperatures in corn leaf aphid
文献类型： 外文期刊
作者： Chen, Yu 2 ; Verheggen, Francois J. 2 ; Sun, Dandan 1 ; Wang, Zhenying 1 ; Francis, Frederic 2 ; He, KangLai 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China
2.Univ Liege, Gembloux Agrobio Tech, Funct & Evolutionary Entomol, Passage Deportes 2, Gembloux, Belgium
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2019 年 9 卷
页码：
收录情况： SCI
摘要： Polyphenism, a common phenomenon in nature, is an important form of adaptation in a diverse environment. Corn leaf aphid (CLA), Rhopalosiphum maidis, (Hemiptera: Aphididae), exhibit wing polyphenism in response to poor habitat quality. In this study, we focused on the effects of crowding and thermal cues on morph determination of CLA. Five developmental stages of aphids (1st to 4th nymphs and maternal adults) with increased population densities, were tested under two kinds of temperature patterns, i.e., A) a constant temperature of 22 degrees C with 2 h exposure to high temperature in the range of 35 to 39 degrees C during mid-photophase and B) different constant temperatures in the range of 22-30 degrees C with 2 h exposure to high temperature of 39 degrees C during mid-photophase. Crowding was found to directly impact winged induction. The 1st and 2 nd nymphs were more sensitive for alate morphs induction under high density. In addition, temperature played a significant role in wing production, with the temperature setting of 26/39 degrees C in pattern B inducing higher alate morphs and survival than other temperature settings. Therefore, we hypothesize that warmer climate with brief high temperature is more favourable for survival and alate morphs production, but cool weather and transient extreme high temperature (>39 degrees C) is detrimental for CLA. Our results provide a new perspective on understanding the interactions between changes in extreme high temperatures and insect densities that differentially affect wing polymorphism for further demographic and distribution rates of species across temporal and spatial scales.
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