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Int. J. Mol. Sci. 2016, 17(11), 1734; doi:10.3390/ijms17111734

Pine Defensive Monoterpene α-Pinene Influences the Feeding Behavior of Dendroctonus valens and Its Gut Bacterial Community Structure

1
State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, No. 1 Beichen West Road, Chaoyang District, Beijing 100101, China
2
TEDA Institute of Biological Sciences and Biotechnology, Nankai University, TEDA, Tianjin 300457, China
3
Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Tianjin 300071, China
4
Fujian Provincial Key Laboratory of Insect Ecology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
5
Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China
*
Author to whom correspondence should be addressed.
Academic Editor: Massimo Maffei
Received: 30 June 2016 / Revised: 29 September 2016 / Accepted: 11 October 2016 / Published: 1 November 2016
(This article belongs to the Special Issue Plant-Insect Interactions)
View Full-Text   |   Download PDF [3055 KB, uploaded 1 November 2016]   |  

Abstract

The exposure to plant defense chemicals has negative effects on insect feeding activity and modifies insect gut microbial community composition. Dendroctonus valens is a very destructive forest pest in China, and harbors a large diversity and abundance of gut microorganisms. Host pine defensive chemicals can protect the pines from attack by the holobiont. In this study, boring length of D. valens feeding on 0 mg/g α-pinene and 9 mg/g α-pinene concentration in phloem media for 6 and 48 h were recorded, and their gut bacterial communities were analyzed in parallel. Nine milligram per gram α-pinene concentration significantly inhibited boring length of D. valens and altered its gut microbial community structure after 6 h. The inhibition of boring length from 9 mg/g α-pinene in diets ceased after 48 h. No significant differences of the bacterial communities were observed between the beetles in 0 and 9 mg/g α-pinene concentration in phloem media after 48 h. Our results showed that the inhibition of the feeding behavior of D. valens and the disturbance to its gut bacterial communities in 9 mg/g α-pinene concentration in phloem media after 6 h were eliminated after 48 h. The resilience of gut bacterial community of D. valens may help the beetle catabolize pine defense chemical. View Full-Text
Keywords: Dendroctonus valens; α-pinene; gut microbiota Dendroctonus valens; α-pinene; gut microbiota
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Xu, L.; Shi, Z.; Wang, B.; Lu, M.; Sun, J. Pine Defensive Monoterpene α-Pinene Influences the Feeding Behavior of Dendroctonus valens and Its Gut Bacterial Community Structure. Int. J. Mol. Sci. 2016, 17, 1734.

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