Feeding of large pine weevil on Scots pine stem triggers localised bark and systemic shoot emission of volatile organic compounds |
| |
Authors: | Juha Heijari James D. BlandeJarmo K. Holopainen |
| |
Affiliation: | a Department of Environmental Science, Kuopio Campus, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland b Kotka Maritime Research Centre, Mussalontie 428 B, FI-48310, Kotka, Finland |
| |
Abstract: | Feeding by the large pine weevil (Hylobius abietis L.) causes severe damage to the bark of Scots pine (Pinus sylvestris L.) seedlings. We measured photosynthesis, the emission of volatile organic compounds from intact and weevil-damaged bark and systemic emissions from undamaged foliage. Feeding damage did not affect photosynthesis. Monoterpenes dominated the emissions from the feeding site, although some sesquiterpenes were also emitted. Weevil feeding increased bark emission of monoterpenes by nearly 4-fold and sesquiterpenes by 7-fold. The influence of weevil damage on systemic monoterpene emissions from shoots was more profound. Several compounds were substantially induced, including linalool, β-phellandrene, limonene and 1,8-cineole. Sesquiterpenes contributed only 1.2% of the total foliage emission, but comprised eight different compounds including (E,E)-α-farnesene, β-bourbonene and (E)-β-farnesene. The total emission of monoterpenes and sesquiterpenes from shoots was respectively 2.8-fold and 2.9-fold higher in the pine weevil damaged plants than the undamaged plants. As many of the induced compounds are highly reactive in the atmosphere and form organic aerosol particles, our results suggest that conifers damaged by insects could become a more important source of secondary organic aerosols than healthy trees. |
| |
Keywords: | ISR Terpenoids Monoterpenes Induced defence Needle Photosynthesis VOC |
本文献已被 ScienceDirect 等数据库收录! |
|