ArticlePlant signaling & behavior2019
Floral scent in a sexually deceptive Ophrys orchid: from headspace collections to solvent extractions.
Article in Plant signaling & behavior, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed, 10 citations in OpenAlex.
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5 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Sexually deceptive orchid flowers use visual, tactile and olfactory cues of female insects in order to attract males of one or a few closely related species as pollinators. Ophrys L. is the most species-rich genus of sexually deceptive orchids in the Mediterranean Basin. Despite Ophrys pollinated by Andrena male bees use alkanes and mainly alkenes with specific double-bond positions as key signals that trigger pseudocopulatory behavior, some volatile organic compounds (VOCs) with low molecular weight were found as long-range attractants non-eliciting copulatory behavior. Since floral scents in Ophrys have been extensively studied by solvent extractions here we aimed to understand which floral volatiles are found when two different collection methods are used in Ophrys panormitana flowers. By knowing their chemical composition, we could better understand the scent chemistry of this Ophrys species without overlooking VOCs which could also have a function in its pollination biology. Scent samples collected by dynamic headspace and by solvent extraction were analyzed by gas chromatography/mass spectrometry (GC/MS). The floral scent of O. panormitana is composed by a bouquet of VOCs with lower and higher molecular weights. The headspace samples contained VOCs with higher volatility (mainly one aliphatic alcohol and two aliphatic ketones) whereas the solvent extracts were composed by VOCs with lower volatility (exclusively long-chain alkanes and alkenes). Overlapping in VOCs between headspace and solvent samples were not found. For the first time Andrena nigroaenea was observed during the pseudocopulation and removing the pollinaria of a flower of O. panormitana. Abbreviations: VOCs, volatile organic compounds; GC/MS, gas chromatography-mass spectrometry; KRI, Kovats Retention Indices.
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