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Ecological fitting: Chemical profiles of plant hosts provide insights on selection cues and preferences for a major buprestid pest
Phytochemistry ( IF 3.8 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.phytochem.2020.112397
Donnie L Peterson 1 , Katalin Böröczky 2 , James Tumlinson 2 , Don Cipollini 3
Affiliation  

Specific cues used by emerald ash borer (EAB, Agrilus planipennis) to select hosts are largely unknown. Attractants are likely general and the use of novel host plants provides an opportunity to investigate the commonality of these cues. We examined volatile profiles emitted by five plants that can host EAB and estimated their importance in explaining known oviposition preferences. Foliage volatiles were collected from potted black ash (Fraxinus nigra), Manchurian ash (F. mandshurica), blue ash (F. quadrangulata), white fringetree (Chionanthus virginicus), and olive (Olea europaea) and analyzed using GC-MS. Fifty-nine compounds were detected including eight green leaf volatiles (GLV), 12 monoterpenes, and 21 sesquiterpenes. Ordination plots show separation of species by full foliage profiles, monoterpenes, sesquiterpenes, and known antennally active compounds, but GLVs were similar across hosts. Random Forest (RF) analysis revealed eight compounds that separated plant species with an error rate of ~19%, consisting mostly of sesquiterpenes. Similarity of GLV profiles among known hosts suggests they serve as general cues for host selection. Manchurian ash, a resistant host, produced the highest quantities and variety of sesquiterpenes indicating that some of these chemicals may be antixenotic. All compounds identified by RF have been implicated as deterrents or attractants to woodborers in other studies and should be investigated for adult antennal activity and attraction.

中文翻译:

生态拟合:植物宿主的化学特征提供了对主要丁虫害虫的选择线索和偏好的见解

翡翠灰螟(EAB、Agrilus planipennis)用来选择宿主的具体线索在很大程度上是未知的。引诱物可能很普遍,使用新型寄主植物提供了研究这些线索的共性的机会。我们检查了五种可以承载 EAB 的植物发出的挥发性特征,并估计了它们在解释已知产卵偏好方面的重要性。从盆栽黑灰 (Fraxinus nigra)、满洲白蜡 (F. mandshurica)、蓝灰 (F. quadrangulata)、白边树 (Chionanthus virginicus) 和橄榄 (Olea europaea) 中收集叶子挥发物,并使用 GC-MS 进行分析。检测到 59 种化合物,包括 8 种绿叶挥发物 (GLV)、12 种单萜和 21 种倍半萜。排序图显示通过全叶剖面、单萜、倍半萜、和已知的触角活性化合物,但宿主之间的 GLV 相似。随机森林 (RF) 分析揭示了八种化合物,它们以 ~19% 的错误率分离植物物种,主要由倍半萜烯组成。已知宿主之间 GLV 配置文件的相似性表明它们可以作为宿主选择的一般线索。满洲灰是一种抗性宿主,产生的倍半萜的数量和种类最多,这表明其中一些化学物质可能具有抗毒作用。在其他研究中,RF 鉴定的所有化合物都被认为是蛀木虫的威慑剂或引诱剂,应研究成虫触角活动和吸引力。已知宿主之间 GLV 配置文件的相似性表明它们可以作为宿主选择的一般线索。满洲灰是一种抗性宿主,产生的倍半萜的数量和种类最多,这表明其中一些化学物质可能具有抗毒作用。在其他研究中,RF 鉴定的所有化合物都被认为是蛀木虫的威慑剂或引诱剂,应研究成虫触角活动和吸引力。已知宿主之间 GLV 配置文件的相似性表明它们可以作为宿主选择的一般线索。满洲灰是一种抗性宿主,产生的倍半萜的数量和种类最多,这表明其中一些化学物质可能具有抗毒作用。在其他研究中,RF 鉴定的所有化合物都被认为是蛀木虫的威慑剂或引诱剂,应研究成虫触角活动和吸引力。
更新日期:2020-08-01
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