Geographically isolated Colorado potato beetle mediating distinct defense responses in potato is associated with the alteration of gut microbiota
文献类型: 外文期刊
作者: Wang, Jie 1 ; Gao, Zhou 1 ; Yang, Mingyu 2 ; Xue, Rongrong 1 ; Yan, Hui 1 ; Fu, Kaiyun 3 ; Zhang, Zhaojuan 1 ; Guo, Wench 1 ;
作者机构: 1.Fujian Agr & Forestry Univ, Coll Crop Sci, Minist Educ Genet Breeding & Multiple Utilizat Cr, Key Lab, Fuzhou 350002, Peoples R China
2.Fujian Agr & Forestry Univ, Coll Life Sci, Fuzhou 350002, Peoples R China
3.Xinjiang Acad Agr Sci, Dept Plant Protect, Urumqi 830052, Peoples R China
4.Xinjiang Acad Agr Sci, Inst Microbiol, Xinjiang Lab Special Environm Microbiol, Urumqi 830052, Peoples R China
5.Penn State Univ, Dept Entomol, University Pk, PA 16802 USA
关键词: Gut microbiota; Leptinotarsa decemlineata; Invasive insects; Induced defense; Polyphenol oxidase; Solanum tuberosum
期刊名称:JOURNAL OF PEST SCIENCE ( 影响因子:5.918; 五年影响因子:5.955 )
ISSN: 1612-4758
年卷期: 2020 年 93 卷 1 期
页码:
收录情况: SCI
摘要: Colorado potato beetle (CPB; Leptinotarsa decemlineata) has been detected in Xinjiang, China, since 1993 and has caused serious damage to potato production during its eastward expansion to new geographic ranges. Symbiotic bacteria often play an essential role for insects to exploit novel food sources and expand into otherwise inaccessible ecological niches. An important yet unresolved question is whether herbivore populations from different geographic ranges have distinct or equal abilities to adapt to plant-induced defenses. We examined whether two geographic CPB populations collected from Urumqi and Ili varied in triggering induced defenses in potato plants, and the results demonstrated that plants damaged by Ili CPB larvae showed higher levels/activities of the defensive protein polyphenol oxidase (PPO) than those damaged by Urumqi CPB larvae. Intriguingly, application of oral secretions (OS) from Ili CPB larvae triggered higher PPO activity in potato compared with the treatments by OS collected from Urumqi larvae. Moreover, higher counts of bacterial colonies were observed in Urumqi CPB larvae by traditional culturing and quantitative PCR. Comparing the gut bacterial composition of CPB individuals by 16S rRNA amplicon sequencing also revealed higher abundance and diversity of gut-associated bacteria in the Urumqi population than that in the Ili population. These results indicate that the gut bacteria of CPB larvae were geographically shaped during the process of invasion, which played an important role in mediating plant-insect interactions and possesses a great potential to drive further invasion.
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