Intra- and inter-specific variation in alarm pheromone produced by Solenopsis fire ants
Intra- and inter-specific variation in alarm pheromone produced by Solenopsis fire ants
复制标题
红火蚁产生的警报信息素的种内和种间变异
DOI：
10.1017/s0007485317001201
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发表时间：
2017-12
影响因子：
1.9
通讯作者：
Chen L
中科院分区：
文献类型：
--
作者：
Hu L;Balusu R R;Zhang W Q;Ajayi O S;Lu Y Y;Zeng R S;Fadamiro H Y;Chen L
摘要在美国南部，一些红火蚁已成为入侵物种，通过竞争取代了当地物种。虽然替代模式似乎很清楚，但竞争优势背后的机制仍不清楚。工蚁产生相对大量报警信息素的能力可能与同域火蚁物种之间相对较大的适合度相对应。在这里，我们报告的报警信息素成分，2-乙基-3，6-二甲基吡嗪（2 E36），几种火蚁种内（即种姓间）和种间的定量差异。报警信息素成分的提取蚂蚁在己烷中浸泡48 h，随后定量气相色谱-质谱法在单离子监测模式。红火蚁工人有更多的2 E36 β比男性或女性的相对重量的有翅类，但个别工人，含有显着较少的吡嗪。因此，我们认为警报信息素可能在有翅类中起着额外的作用。红火蚁（Solenopsis richteri，S. invicta和杂种（S. richteri × S. invicta）的2 E36 α显著高于当地火蚁物种Solenopsis geminata。杂交火蚁的2 E36受体显著低于两个亲种，S. richteri和S. invicta似乎更高的报警信息素含量可能有利于入侵成功的外来火蚁本地物种。我们讨论了吡嗪含量的种间变异的潜在作用，所观察到的变化在美国南部的三个外来火蚁物种的空间分布和本地火蚁物种的位移之间的关系。
Abstract Some fire ants of the genus Solenopsis have become invasive species in the southern United States displacing native species by competition. Although the displacement pattern seems clear, the mechanisms underlying competitive advantage remain unclear. The ability of ant workers to produce relatively larger amount of alarm pheromone may correspond to relative greater fitness among sympatric fire ant species. Here we report on quantitative intra-specific (i.e. inter-caste) and inter-specific differences of alarm pheromone component, 2-ethyl-3,6-dimethylpyrazine (2E36DMP), for several fire ant species. The alarm pheromone component was extracted by soaking ants in hexane for 48 h and subsequently quantified by gas chromatography-mass spectrometry at single ion monitoring mode. Solenopsis invicta workers had more 2E36DMP than male or female alates by relative weight; individual workers, however, contained significantly less pyrazine. We thus believe that alarm pheromones may serve additional roles in alates. Workers of Solenopsis richteri, S. invicta, and hybrid (S. richteri × S. invicta) had significantly more 2E36DMP than a native fire ant species, Solenopsis geminata. The hybrid fire ant had significantly less 2E36DMP than the two parent species, S. richteri and S. invicta. It seems likely that higher alarm pheromone content may have favored invasion success of exotic fire ants over native species. We discuss the potential role of inter-specific variation in pyrazine content for the relationship between the observed shifts in the spatial distributions of the three exotic fire ant species in southern United States and the displacement of native fire ant species.
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影响因子：
56.9
作者：
BRAND, JM;DUFFIELD, RM;FALES, HM
通讯作者：
FALES, HM
从火蚁 Solenopsis invicta 中分离出一种吡嗪报警信息素成分
影响因子：
2.3
作者：
Meer, Robert K. Vander;Preston, Catherine A.;Choi, Man-Yeon
通讯作者：
Choi, Man-Yeon
影响因子：
4.2
作者：
S. Porter
通讯作者：
S. Porter
影响因子：
56.9
作者：
E. Wilson
通讯作者：
E. Wilson
影响因子：
2.3
作者：
Hughes, WOH;Howse, PE;Goulson, D
通讯作者：
Goulson, D