文献类型： 外文期刊
作者： Li, Fengqi 1 ; Tian, Jiahui 2 ; Di, Zhongjuan 2 ; Qu, Cheng 2 ; Fu, Yuejun 3 ; Yang, Shiyong 4 ; Luo, Chen 1 ;
作者机构： 1.Yangzhou Univ, Coll Plant Protect, Yangzhou 225009, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, Beijing 100097, Peoples R China
3.Shanxi Univ, Inst Biotechnol, Key Lab Chem Biol & Mol Engn, Minist Educ, Taiyuan 030006, Peoples R China
4.Anhui Normal Univ, Sch Ecol & Environm, Wuhu, Peoples R China
关键词： Whitefly; Orco; Behavior; Host recognition; Oviposition; RNAi
期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：4.2； 五年影响因子：4.6 ）
ISSN： 0048-3575
年卷期： 2024 年 199 卷
页码：
收录情况： SCI
摘要： Chemical signals play a central role in mediating insect feeding and reproductive behavior, and serve as the primary drivers of the insect-plant interactions. The detection of chemical signals, particularly host plant volatiles, relies heavily on the insect's complex olfactory system. The Bemisia tabaci cryptic species complex is a group of globally important whitefly pests of agricultural and ornamental crops that have a wide range of host plants, but the molecular mechanism of their host plant recognition is not yet clear. In this study, the odorant coreceptor gene of the Whitefly MEAM1 cryptic species (BtOrco) was cloned. The coding sequence of BtOrco was 1413 bp in length, with seven transmembrane structural domains, and it was expressed primarily in the heads of both male and female adult whiteflies, rather than in other tissues. Knockdown of BtOrco using transgenic plant-mediated RNAi technology significantly inhibited the foraging behavior of whiteflies. This inhibition was manifested as a reduced percentage of whiteflies responding to the host plant and a prolonged foraging period. Moreover, there was a substantial suppression of egg-laying activity among adult female whiteflies. These results indicate that BtOrco has the potential to be used as a target for the design of novel active compounds for the development of environmentally friendly whitefly control strategies.
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