Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/11068
Title: Chemical composition and secretion biology of the floral bouquet in legume trees (Fabaceae).
Authors: Marinho, Cristina Ribeiro
Martucci, Maria Elvira Poleti
Gobbo Neto, Leonardo
Teixeira, Simone de Pádua
Keywords: Leguminosae
Osmophore
Cytology
Floral scents
Sas chromatography
Issue Date: 2018
Citation: MARINHO, C. R. et al. Chemical composition and secretion biology of the floral bouquet in legume trees (Fabaceae). Botanical Journal of the Linnean Society, v. 187, n. 1, p. 5–25, maio 2018. Disponível em: <https://academic.oup.com/botlinnean/article-abstract/187/1/5/4947795?redirectedFrom=fulltext>. Acesso em: 25 fev. 2019.
Abstract: In the present investigation, we studied the floral bouquet and its associate osmophores in three legume trees using a combination of chemical and ultrastructural analyses, a poorly investigated approach to plant glands. The purpose was to understand the secretory process of osmophores and to identify which of the substances produced are responsible for the attraction of pollinators. Petals from buds and flowers of Bauhinia rufa, Caesalpinia pulcherrima and Hymenaea courbaril were fixed and processed for analysis by transmission electron microscopy. Fresh petals of H. courbaril and C. pulcherrima were also collected, submitted to a headspace solid-phase micro-extraction method and analysed using GC-MS. Typical subcellular features of terpene-secreting osmophores were detected: abundance of mitochondria with conspicuous cristae, plastids with plastoglobuli, rough endoplasmic reticulum and the presence of vesicles and oil droplets in the cytoplasm. Novel subcellular characters of osmophores were detected, such as cellular vacuolation in stages far preceding anthesis and a wealth of dictyosomes. The ultrastructure confirmed that the osmophores produce terpenes and phenolic compounds as previously reported. However, the GC-MS analyses showed that only the terpenes are released and could act on pollinator attraction. The phenolics accumulated are mobilized from these structures and metabolized/reabsorbed by the other plant tissues.
URI: http://www.repositorio.ufop.br/handle/123456789/11068
metadata.dc.identifier.uri2: https://academic.oup.com/botlinnean/article-abstract/187/1/5/4947795?redirectedFrom=fulltext
metadata.dc.identifier.doi: https://doi.org/10.1093/botlinnean/boy002
ISSN: 1095-8339
Appears in Collections:DEFAR - Artigos publicados em periódicos

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