Variation in floral volatiles across time, sexes, and populations of wind‐pollinated Schiedea globosa
Variation in floral volatiles across time, sexes, and populations of wind‐pollinated Schiedea globosa
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随时间、性别和风授粉 Schiedea globosa 种群的花挥发物的变化
DOI：
10.1002/ajb2.1820
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发表时间：
2022
影响因子：
3
通讯作者：
Campbell, Diane R.
中科院分区：
文献类型：
--
作者：
Powers, John M.;Sakai, Ann K.;Weller, Stephen G.;Campbell, Diane R.
花香是植物繁殖的一个重要方面，但其在多个尺度上的种内变异却知之甚少。性二型性和气味的时间调节可以通过进化来塑造，种群间的变化可能是物种差异的桥梁。我们测试了是否在风授粉的物种，从生物授粉的选择是不存在的种内化学多样性与遗传分化在整个Hawaiian archipelago.MethodsFloral挥发物从女性，男性，和雌雄同体subdioeciousSchiedea globosagrown在一个共同的环境中从12个种群采样昼夜和气相色谱-质谱分析。组间的变化进行了分析，约束排序。我们还研究了气味相异的地理和遗传population.ResultsFlowers之间的距离的关系增加了总排放量在夜间通过更高的排放量的几个酮，肟，苯乙醛。女性发出的总气味每花在晚上，但更多的一些脂肪族化合物比男性，男性发出更多的酮和醛肟。气味在白天和晚上的人群之间存在差异。在夜间产生的气味的分歧增加与地理距离在70-100公里内，并增加与遗传距离的男性在白天和夜晚，但不为femors.ConclusionsSchiedea globosa展品昼夜和性别为基础的变化，尽管风授粉和假定的生物授粉的花的气味。在男性中，种群间的气味差异与遗传差异相关，这表明气味是随着岛屿内部和岛屿之间的传播而进化的。
PremiseFloral scent is a key aspect of plant reproduction, but its intraspecific variation at multiple scales is poorly understood. Sexual dimorphism and temporal regulation of scent can be shaped by evolution, and interpopulation variation may be a bridge to species differences. We tested whether intraspecific chemical diversity in a wind‐pollinated species where selection from biotic pollination is absent is associated with genetic divergence across the Hawaiian archipelago.MethodsFloral volatiles from females, males, and hermaphrodites of subdioeciousSchiedea globosagrown in a common environment from 12 populations were sampled day and night and analyzed by gas chromatography–mass spectrometry. Variation among groups was analyzed by constrained ordination. We also examined the relationships of scent dissimilarity to geographic and genetic distance between populations.ResultsFlowers increased total emissions at night through higher emissions of several ketones, oximes, and phenylacetaldehyde. Females emitted less total scent per flower at night but more of some aliphatic compounds than males, and males emitted more ketones and aldoximes. Scent differed among populations during day and night. Divergence in scent produced at night increased with geographic distance within 70–100 km and increased with genetic distance for males during the day and night, but not for females.ConclusionsSchiedea globosaexhibits diel and sex‐based variation in floral scent despite wind pollination and presumed loss of biotic pollination. In males, interpopulation scent differences are correlated with genetic differences, suggesting that scent evolved with dispersal within and across islands.