关键词: 复叶槭, 干旱, 挥发物, 光肩星天牛, GC-EAD, 田间实验

Abstract:

The volatile organic compounds emitted from 3-year-old ash-leaf maple seedlings (Acer negundo) under drought stress were identified. Emissions of nine volatile compounds, including butyl alcohol, pentyl alcohol, trans-2-hexen-1-al, cis-3-hexen-1-ol, pentanal, pentanoic acid, hexanal, hexanoic acid, and acetophenone, increased and a tenth compound, longifolene, decreased when the trees were subjected to water stress. After the trees were re-watered the amount of acetophenone increased, but the amounts of other volatiles including longifolene decreased. The response of Asian longhorned beetle (ALB, Anoplophora glabripennis M.) to volatiles was examined with GC-EAD, and with field bioassay using traps and synthetic compounds. Butyl alcohol, pentyl alcohol and cis-3-hexen-1-ol, elicited antennal responses from ALB. The activity was confirmed in the field test. Thus, drought stress appears to play an important role in the host selection behavior of ALB.

Key words: Ash-leaf maple, Drought stress, Volatile compounds, Asian long-horned beetle, GC-EAD, Field test