Feeding experience on hairy vetch induces a loss of host-specific adaptation to maize and changes in the gut microbiota communities of the fall armyworm
文献类型: 外文期刊
第一作者: Ma, Lin
作者: Ma, Lin;Wang, Dao-Tong;Ren, Qi-Lin;Zhang, Lei;Cheng, Yun-Xia;Jiang, Xing-Fu
作者机构:
关键词: Spodoptera frugiperda; Green manure; Gut microbiota; Host adaptation; Maize
期刊名称:JOURNAL OF PEST SCIENCE ( 影响因子:4.8; 五年影响因子:5.0 )
ISSN: 1612-4758
年卷期: 2023 年
页码:
收录情况: SCI
摘要: Developing ecological control technologies against the fall armyworms (FAWs) is crucial. The ecological role of green manure crops has gained attention for their indirect contribution to enhancing crop resistance against specific pests and diseases in rotation systems. We hypothesize that green manure application directly affects FAWs host utilization. By using two-sex life tables, we measured the host adaptation of FAWs to hairy vetch and their offspring's adaptation to the original host (maize) as breeding generations increased during larval stages fed on hairy vetch. When FAWs' adaptability to maize was significantly affected by feeding on hairy vetch, we used 16s rDNA sequencing to detect the gut microbiota composition of current generation of FAW populations that fed continuously on either hairy vetch or maize. Our results suggest that continuous feeding of FAWs on hairy vetch does not enhance their adaptation to the host plant across generations, indicating no increased risk of damage to hairy vetch in maize-hairy vetch rotation. As successive generations of FAWs fed on hairy vetch, their host-specific adaptation to maize decreased or even lost, which was shown by a decrease in pupal weight and fecundity, as well as an inability of emergent adults in completing mating. FAWs' gut microbiota exhibited lower diversity when fed on hairy vetch compared to maize. Cyanobacteria were not detected in "Hairy_vetch" group, while Oxyphotobacteria_unclassified, Acinetobacter, Pseudomonas, Serratia, and Klebsiella showed significantly differences in abundance between the "Maize" and "Hairy_vetch" groups. Additionally, gut microbial taxa and FAWs performance were significantly correlated. Overall, the feeding experience of FAWs on hairy vetch resulted in a reduced or was lost maize-specific adaptation, as shown through changes in gut microbiota. Our study provides experimental evidence for the ecological role of maize-green manure rotation systems in pest management.
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