| 孙 雪，徐 天，陈瑞旭，郝德君,2025,寄主挥发物在两种星天牛成虫取食后的分化及其对天牛行为的影响[J].环境昆虫学报,(6):1750-1758 |
| 寄主挥发物在两种星天牛成虫取食后的分化及其对天牛行为的影响 |
| Differentiation of the volatiles from a host plant fed upon by the adults of two Anoplophora species and their impacts on beetle behavior |
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| DOI： |
| 中文关键词: 蛀干害虫 光肩星天牛 星天牛 成虫取食 寄主挥发物 |
| 英文关键词:Wood-boring pests Anoplophora glabripennis Anoplophora chinensis adult feeding host volatiles |
| 基金项目:国家自然科学基金（32001322） |
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| 中文摘要: |
| 光肩星天牛Anoplophora glabripennis和星天牛Anoplophora chinensis是我国重要的林木蛀干害虫，在多地危害相同寄主。研究表明，两种星天牛成虫相遇后会发生种间交配，但在寄主枝条上自由共存时，种间极少错配，说明存在未知机制能够降低两种天牛在同一寄主上的相遇概率。过去对两种天牛的研究均发现，成虫取食伤口释放的挥发物对成虫具有吸引作用。本研究利用室内嗅觉生测探究了两种星天牛成虫对被两种天牛成虫取食后的复叶槭Acer negundo枝条挥发物的行为反应，并利用气相色谱-质谱联用技术对两种星天牛雌、雄成虫取食后的复叶槭枝条的挥发物化学成分进行了分析，旨在探明两种星天牛成虫取食同一寄主枝条后，其挥发物的化学成分是否出现分化，对两种天牛的吸引作用是否存在种间特异性，从而有助于两种天牛在同一寄主上减少相遇。室内嗅觉生测结果表明，相比未被取食的枝条，两种星天牛都对成虫取食后的枝条挥发物表现出更强的趋性。当两种天牛成虫取食后的枝条挥发物同时存在时，两种天牛的雌成虫对同类取食后的枝条挥发物的趋性明显强于被异类取食后的枝条挥发物，但雄虫的选择偏好性不明显。化学分析结果显示，在被两种天牛成虫取食后的枝条挥发物中，有多种物质的相对含量存在显著差异。对乙基苯乙酮、α-法尼烯只在光肩星天牛取食过的枝条挥发物中发现，癸醛、棕榈酸的相对含量在光肩星天牛取食后的枝条挥发物中显著更高，而β-罗勒烯、正壬醛、4-乙基苯甲醛的相对含量则在星天牛取食后的枝条挥发物中显著更高。本研究结果说明，两种星天牛成虫取食能够使同一寄主枝条释放出差异性的挥发物，且其活性具有种间特异性，可能有助于两种星天牛成虫降低种间交配干扰，实现同域共存。 |
| 英文摘要: |
| Anoplophora glabripennis and Anoplophora chinensis are important wood-boring pests in China, damaging the same host species in many areas. Previous studies have shown that the adults of two species can mate when they encounter, whereas interspecific mating is rare when they coexist freely on host branches, suggesting the presence of unknown mechanism that can reduce the encountering probability of two species on the same host. It has been found that the volatiles released from the wounds caused by adult feeding are attractive to the adults in both species. In this study, the behavioral responses of the adults of two Anoplophora species to the volatiles released from Acer negundo twigs fed upon by two species were investigated using indoor olfactory bioassays, and the chemical compositions of the volatiles from the A. negundo twigs fed upon by male and female A. glabripennis and A. chinensis were analyzed using Gas chromatography-mass spectrometry (GC-MS). The purpose of this study is to determine whether there is differentiation in the chemical compositions of the volatiles released from the same host twigs fed upon by two species, and whether the attractions of these volatiles have species-specificity, which may help reduce the encounters between each other on the same host. The results from the olfactory bioassays showed that both species were more attracted to the volatiles released from the beetle-fed twigs than those from unfed twigs. When the volatiles from the twigs fed upon by two species coexisted, the females of both species were significantly more attracted to the volatiles from the conspecific-fed twigs than those from the interspecific-fed twigs, but this preference was not clearly observed in the males of two species. Chemical analyses indicated that the relative contents of some compounds significantly differed in the volatiles released from the twigs fed upon by two species. Ethylacetophenone and α-farnesene were only detected in the volatiles from the twigs fed upon by A. glabripennis, and the relative contents of decanal and n-hexadecanoic acid were significantly higher in the volatiles from the twigs fed upon by A. glabripennis. The relative contents of β-ocimene, n-nonanal and 4-ethylbenzaldehyde were significantly higher in the volatiles from the twigs fed upon by A. chinensis. The results of this study suggest that feeding by the adults of two Anoplophora species can cause the release of differential volatiles from the same host twigs, and the activities of these volatiles have interspecific specificity, which may help two species reduce interspecific mating interference and achieve sympatric coexistence. |
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