| Title: | Monoterpenoid signals and their transcriptional responses to feeding and juvenile hormone regulation in bark beetle Ips hauseri |
| Author(s): | Fang JX; Du HC; Shi X; Zhang SF; Liu F; Zhang Z; Zu PJ; Kong XB; |
| Address: | "Key Laboratory of Forest Protection of National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China. Department of Geography, University of Zurich, CH-8057 Zurich, Switzerland" |
| ISSN/ISBN: | 1477-9145 (Electronic) 0022-0949 (Linking) |
| Abstract: | "Hauser's engraver beetle, Ips hauseri, is a serious pest in spruce forest ecosystems in Central Asia. Its monoterpenoid signal production, transcriptome responses and potential regulatory mechanisms remain poorly understood. The quality and quantity of volatile metabolites in hindgut extracts of I. hauseri were found to differ between males and females and among three groups: beetles that were newly emerged, those with a topical application of juvenile hormone III (JHIII) and those that had been feeding for 24 h. Feeding males definitively dominated monoterpenoid signal production in I. hauseri, which uses (4S)-(-)-ipsenol and (S)-(-)-cis-verbenol to implement reproductive segregation from Ipstypographus and Ipsshangrila. Feeding stimulation induced higher expression of most genes related to the biosynthesis of (4S)-(-)-ipsenol than JHIII induction, and showed a male-specific mode in I. hauseri. JHIII stimulated males to produce large amounts of (-)-verbenone and also upregulated the expression of several CYP6 genes, to a greater extent in males than in females. The expression of genes involved in the metabolism of JHIII in females and males was also found to be upregulated. Our results indicate that a species-specific aggregation pheromone system for I. hauseri, consisting of (4S)-(-)-ipsenol and S-(-)-cis-verbenol, can be used to monitor population dynamics or mass trap killing. Our results also enable a better understanding of the bottom-up role of feeding behaviors in mediating population reproduction/aggregation and interspecific interactions" |
| Keywords: | Animals *Coleoptera/genetics Ecosystem Female Juvenile Hormones Male Monoterpenes Pheromones Plant Bark (4S)-(-)-Ipsenol Bark beetle Bottom-up effects Chemical communication Species interactions Transcriptome analysis; |
| Notes: | "MedlineFang, Jia Xing Du, Hui Cong Shi, Xia Zhang, Su Fang Liu, Fu Zhang, Zhen Zu, Peng Juan Kong, Xiang Bo eng Research Support, Non-U.S. Gov't England 2021/04/03 J Exp Biol. 2021 May 1; 224(9):jeb238030. doi: 10.1242/jeb.238030. Epub 2021 May 4" |
