Reproductive Phytochemistry of Bombacaceae

Scogin, Ron

doi:10.5642/aliso.19861103.09

Cited by 14 publications

(6 citation statements)

References 18 publications

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“…1 Despite the economic significance of Ceiba and Ochroma species as sources of kapok and balsa wood, respectively, little is known about the chemistry of plants from this family. 2,3 As part of our program of study of the Brazilian flora, we have carried out the first investigation of the chemical constituents of the bark from Bombacopsis glabra (Pasq.) A. Robyns.…”

Section: Introductionmentioning

confidence: 99%

Chemical Constituents from Bombacopsis glabra (Pasq.) A. Robyns: Complete ¹H and 13C NMR Assignments and X Ray Structure of 5-Hydroxy-3,6,7,8,4'-pentamethoxyflavone

Paula

Barbosa

Errington

et al. 2002

J. Braz. Chem. Soc.

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Do extrato hexânico da casca do caule de Bombacopsis glabra (Bombacaceae) foram isolados a flavona 5-hidroxi-3,6,7,8,4'-pentametoxiflavona (1) e os triterpenos lupenona, 9,19-ciclolanost-23-eno-3β,25-diol (2), (24R)-9,19-ciclolanost-25-eno-3β,24-diol (3) e (24S)-9,19-ciclolanost-25-eno-3β,24-diol (4). As estruturas foram determinadas por espectroscopia de RMN de 13 C e de 1 H (1D e 2D) e EM, e ainda, por comparação com dados da literatura para os triterpenos. A confirmação inequívoca da estrutura da flavona 1 foi realizada por um estudo de difração de raios X. As cinco substâncias foram isoladas pela primeira vez de espécies de Bombacaceae.The flavone 5-hydroxy-3,6,7,8,4'-pentamethoxyflavone (1) and the triterpenes lupenone, 9,19-cyclolanost-23-ene-3β,25-diol (2), (24R)-9,19-cyclolanost-25-ene-3β,24-diol (3) and (24S)-9,19-cyclolanost-25-ene-3β,24-diol (4) were isolated from the hexane extract of the stem bark of Bombacopsis glabra (Bombacaceae). The structures were determined by 13 C and 1 H NMR (1D and 2D) and mass spectrometry, and by comparison with literature data for triterpenes. The structure of the flavone 1 was unambiguously confirmed by a X-ray diffraction study. The five substances were isolated for the first time from Bombacaceae species.

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Section: Introductionmentioning

confidence: 99%

Chemical Constituents from Bombacopsis glabra (Pasq.) A. Robyns: Complete ¹H and 13C NMR Assignments and X Ray Structure of 5-Hydroxy-3,6,7,8,4'-pentamethoxyflavone

Paula

Barbosa

Errington

et al. 2002

J. Braz. Chem. Soc.

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“…6 ). Including the taxa from our investigation, UV-fluorescent nectar has been documented for 41 species (19 families), predominantly belonging to the eudicots 18 , 21 , 22 , 30 , 37 (Table 2 ). For most of these families, the occurrence of UV-fluorescent nectar varies within family, genus, or even species (Table 2 ; Supplementary Table S3 ).…”

Section: Discussionmentioning

confidence: 99%

“…The phylogeny is adapted from that of the Angiosperm Phylogeny Group 67 and data is summarized from Thorp et al . 18 , Scogin 21 , Roshchina et al . 22 , Nakanishi 30 , Davis et al 37 , and the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Out of the 102 flowering plant species examined, 23 had nectar that fluoresced yellow to blue with varying degrees of intensity and the majority pollinated by bees 18 . Apart from nectar fluorophore (i.e., fluorescent molecule) identification for three species 19 – 21 , our understanding of UV-fluorescent nectar has seen limited progress since its discovery. Suggestions that nectar fluorescence could be used as an indicator of secretory cells in vivo 22 , 23 and conceptual arguments about its ecological importance 24 , 25 have not significantly enriched our fundamental knowledge of UV-fluorescent nectar.…”

Section: Introductionmentioning

confidence: 99%

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Shining a light on UV-fluorescent floral nectar after 50 years

Zenchyzen,

Acorn,

Merkosky

et al. 2024

Sci Rep

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Nature is aglow with numerous captivating examples of UV-fluorescence in the animal kingdom. Despite a putative role as a visual signal, exploration of UV-fluorescence in plants and its role in plant-animal interactions is lagging in comparison. Almost 50 years ago, UV-fluorescence of floral nectar, a crucial reward for pollinators, was reported for 23 flowering plant species. Since this intriguing discovery, UV-fluorescent nectar has only seldom been addressed in the scientific literature and has not been scrutinized in a phylogenetic or ecological context. Here, we report the prevalence of vibrant UV-fluorescent floral nectar across the family Cleomaceae, including the first photographic documentation in vivo colour for flowering plants. Though Cleomaceae flowers are morphologically diverse varying in colour, nectary prominence, and nectar volume, UV-fluorescent floral nectar may be a ubiquitous characteristic of the family. Fluorescence spectra show that the identity and number of fluorescent compounds in floral nectar may differ among Cleomaceae species. As Cleomaceae pollinators range from insects to bats and birds, we suggest that the UV-fluorescent floral nectar not only functions as a visual cue for the diurnal pollinators but also for the nocturnal/crepuscular pollinators in low light settings.

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“…A elucidação estrutural foi efetuada por análise de dados espectroscópicos nas regiões do ultravioleta, do infravermelho, de ressonância magnética nuclear de hidrogênio e de carbono-13 incluindo técnicas uni-e bidimensional e por espectrometria de massas. Os constituintes voláteis e alguns pigmentos florais foram identificados, respectivamente, por cromatografia em fase gasosa acoplada à espectrometria de massas 7,8 e por cromatografia em papel 6 .…”

Section: Constituintes Químicosunclassified