Nectar-inhabiting microorganisms influence nectar volatile composition and attractiveness to a generalist pollinator
Nectar-inhabiting microorganisms influence nectar volatile composition and attractiveness to a generalist pollinator
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DOI：
10.1111/nph.14809
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发表时间：
2018-11-01
期刊：
影响因子：
9.4
通讯作者：
Vannette, Rachel L.
中科院分区：
文献类型：
--
作者：
Rering, Caitlin C.;Beck, John J.;Vannette, Rachel L.
植物微生物组可以以多种方式影响植物表型，但微生物对植物挥发性表型的贡献仍然知之甚少。我们研究了真菌和细菌在花蜜的共花植物群落的存在下，共同花蜜微生物产生的挥发物的特征，并研究其对传粉者的偏好的影响。花蜜进行采样花蜜栖息的微生物的存在。我们的特点是四种常见的真菌和细菌的花蜜类似物的顶部空间。我们研究了蜜蜂对微生物挥发物的电生理和行为反应。在野外采集的花卉顶空样品中，微生物挥发物的存在进行了调查。微生物通常栖息在花卉花蜜中，常见的物种在挥发物谱中存在差异。蜜蜂检测到大多数微生物挥发物测试和区分解决方案的基础上挥发物。花的顶空样品含有微生物相关的挥发物，2-乙基-1-己醇和2-壬酮-蜜蜂检测到的-更经常检测到真菌丰富时。花蜜栖息的微生物产生挥发性化合物，这可以不同地影响蜜蜂的偏好。酵母Metschnikowia reukaufii产生独特的化合物，是所有微生物中最有吸引力的。微生物的可变存在可能提供影响植物-传粉者相互作用的挥发性线索。
The plant microbiome can influence plant phenotype in diverse ways, yet microbial contribution to plant volatile phenotype remains poorly understood. We examine the presence of fungi and bacteria in the nectar of a coflowering plant community, characterize the volatiles produced by common nectar microbes and examine their influence on pollinator preference.Nectar was sampled for the presence of nectar-inhabiting microbes. We characterized the headspace of four common fungi and bacteria in a nectar analog. We examined electrophysiological and behavioral responses of honey bees to microbial volatiles. Floral headspace samples collected in the field were surveyed for the presence of microbial volatiles.Microbes commonly inhabit floral nectar and the common species differ in volatile profiles. Honey bees detected most microbial volatiles tested and distinguished among solutions based on volatiles only. Floral headspace samples contained microbial-associated volatiles, with 2-ethyl-1-hexanol and 2-nonanone - both detected by bees - more often detected when fungi were abundant.Nectar-inhabiting microorganisms produce volatile compounds, which can differentially affect honey bee preference. The yeast Metschnikowia reukaufii produced distinctive compounds and was the most attractive of all microbes compared. The variable presence of microbes may provide volatile cues that influence plant-pollinator interactions.