Volatile signaling in weed plant Ageratina adenophora: Understanding the key emissions influencing Procecidochares utilis attraction to gall formation

文献类型： 外文期刊

第一作者： Kanjana, Nipapan

作者： Kanjana, Nipapan;Li, Yuyan;Zhang, Lisheng;Zhang, Lisheng;Kanjana, Nipapan;Li, Yuyan;Ahmed, Muhammad Afaq;Ma, Lin;Zhang, Lisheng

作者机构：

关键词： Stem galling fly; Herbivore-induced volatiles; Ageratina adenophora; Gas chromatography; Electroantennography

期刊名称：PLANT SCIENCE （ 影响因子：4.1； 五年影响因子：5.1 ）

ISSN： 0168-9452

年卷期： 2025 年 353 卷

页码：

收录情况： SCI

摘要： The stem gall fly (Procecidochares utilis) significantly impacts host-plant biology by inhabiting specific parts of stem tissue, ensuring its own survival. Despite this, comprehensive identification of the primary bioactive compounds within host plants that are involved in gall formation remains elusive. This study aims to elucidate the crucial volatile compounds utilized by gall flies to alter host-plant defenses, either through direct or indirect manipulation via the release of an enticing volatile compound attractive to the fly. Employing Y-tube olfactometer assays, we examined the response of Procecidochares utilis to host plants from three Asteraceae weed species-Ageratina adenophora, Ageratum conyzoides, and Praxelis clematidea. Volatile compounds were extracted using headspace solid-phase microextraction (HS-SPME) and SPME-FIBER. Subsequently, gas chromatographyelectroantennography and electroantennography were employed to analyze the antennal responses to individual odorants. The analysis revealed that the primary bioactive compound varied among the three weed species. Out of a total of 805 known volatiles, 65 main active compounds were exclusive to Ageratina adenophora (host plant). Remarkably, only 8 bioactive compounds were identified to elicit an antennal response from Procecidochares utilis. Notably, caryophyllene, (3-bisabolene, and 4-thujen-2-alpha-yl acetate exhibited the remarkable ability to elicit an attraction response from both sexes of Procecidochares utilis. Among these, (3-bisabolene emerged as the key compound, eliciting the most significant response from the gall fly antenna. Our findings offer novel insights into the specific attraction of the stem gall fly to Ageratina adenophora, utilizing key odorants as unique cues for initiating gall formation on its host plant. This discovery highlights how these cues enable the gall fly to exert direct or indirect control over its host. Additionally, these findings underscore the potential of this approach in the development of sustainable pest management strategies in the context of field trials.

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