Weiss Julia, Mühlemann Joëlle K, Ruiz-Hernández Victoria, Dudareva Natalia, Egea-Cortines Marcos
Department of Genetics, Institute of Biotechnology, Universidad Politécnica de Cartagena Cartagena, Spain.
Department of Biology, Wake Forest University, Winston-Salem NC, USA.
Front Plant Sci. 2016 Dec 21;7:1903. doi: 10.3389/fpls.2016.01903. eCollection 2016.
The genus comprises about 28 species with a center of origin in the Iberian Peninsula. They show an important diversity of growing niches. We have performed a comprehensive analysis of scent profiles in eight wild species, , and . We used also two laboratory inbred lines , 165E and Sippe50. We identified 63 volatile organic compounds (VOCs) belonging to phenylpropanoids, benzenoids, mono- and sesquiterpenes, nitrogen-containing compounds, and aliphatic alcohols previously described in plants. Twenty-four VOCs were produced at levels higher than 2% of total VOC emission, while other VOCs were emitted in trace amounts. The absolute scent emission varied during flower maturation and species. The lowest emitting was while had the largest emissions. Species were clustered according to their scent profiles and the resulting dendrogram matched the current species phylogeny. However, two accessions, Sippe 50 and , showed development-specific changes in their VOC composition, suggesting a precise control and fine tuning of scent profiles. Cluster analysis of the different scent components failed to identify a specific synthesis pathway, indicating a key role of scent profiles as blends. There is considerable degree of chemodiversity in scent profiles in . The specific developmental stage plays an important role in scent quantitative emissions. The relative robustness of the bouquets could be an adaptation to local pollinators.
该属包含约28个物种，起源中心位于伊比利亚半岛。它们展现出丰富多样的生长生态位。我们对8个野生种，即[物种名称1]、[物种名称2]和[物种名称3]的气味谱进行了全面分析。我们还使用了两个实验室自交系，165E和Sippe50。我们鉴定出63种挥发性有机化合物（VOCs），它们属于苯丙烷类、苯类、单萜和倍半萜类、含氮化合物以及植物中先前描述过的脂肪醇类。24种VOCs的产生量高于总VOC排放量的2%，而其他VOCs则微量排放。花朵成熟过程中和不同物种间的绝对气味排放量有所不同。排放量最低的是[物种名称4]，而[物种名称5]的排放量最大。根据气味谱对物种进行聚类，所得的树状图与当前的物种系统发育相匹配。然而，两个种质，Sippe 50和[物种名称6]，在其VOC组成上表现出特定发育阶段的变化，这表明气味谱存在精确的调控和微调。对不同气味成分的聚类分析未能确定特定的合成途径，这表明气味谱作为混合体起着关键作用。[属名]的气味谱存在相当程度的化学多样性。特定的发育阶段在气味定量排放中起着重要作用。花束的相对稳定性可能是对当地传粉者的一种适应。
