Jasmonate induced terpene‐based defense in Pinus massoniana depresses Monochamus alternatus adult feeding. Issue 2 (18th September 2020)

• Record Type: Journal Article
• Authors: Chen, Ruixu; Huang, Kairu; Pan, Shiye; Xu, Tian; Tan, Jiajin; Hao, Dejun
• Is Part Of: Pest management science. Volume 77:Issue 2(2021)
• Page Start: 731
• Page End: 740
• Publication Date: 2020-09-18
• Subjects: methyl jasmonate -- terpenoid -- induced defense -- Monochamus alternatus -- Pinus massoniana; Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.6068
• Languages: English
• ISSNs: 1526-498X

Abstract

Abstract: BACKGROUND: Symptoms of pine wilt disease (PWD) are caused when pathogenic pine wood nematodes (PWN) invade healthy host trees via wounds created by adult Monochamus alternatus . Exogenous methyl jasmonate (MeJA) can trigger terpene‐based induced defense in conifers, which is a core part of the conifer defense system. Herein, we hypothesized that the terpene‐based plant defense induced by MeJA could negatively affect the feeding behavior of M. alternatus adults, and may contribute to a new strategy in the control of PWD. RESULTS: The feeding area for M. alternatus adults feeding on MeJA‐treated seedlings was significantly smaller compared with control seedlings. However, no significant difference was detected in the enzyme activities in the midgut of beetles that had fed on these seedlings. Terpenoids were mainly accumulated in traumatic resin duct, whereas the constitutive resin duct accumulated only diterpenoids. Correspondingly, large‐scaled responses at the transcriptional level mainly focused on terpenoid and phenolic biosynthesis in the defending trees. CONCLUSIONS: Breeding tree species with a high resin yield may contribute to control of the spread of PWD by suppressing the feeding of M. alternatus adults. Transcriptome sequencing results provided abundant information for further breeding of highly resistant trees. Based on these findings, a potential push–pull strategy for the control of M. alternatus was discussed. Abstract : Methyl jasmonate (MeJA) induced terpenoid‐based defense in Pinus massoniana and significantly suppressed Monochamus alternatus adult feeding, which indicates the potential value of breeding conifer species with a high resin yield. © 2020 Society of Chemical Industry