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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Chemical composition and secretion biology of the floral bouquet in legume trees (Fabaceae)

Texto completo
Autor(es):
Marinho, Cristina Ribeiro [1] ; Poleti Martucci, Maria Elvira [1] ; Gobbo-Neto, Leonardo [1] ; Teixeira, Simone Padua [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Ave Cafe S-N, BR-14040903 Ribeirao Preto, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Botanical Journal of the Linnean Society; v. 187, n. 1, p. 5-25, MAY 2018.
Citações Web of Science: 4
Resumo

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 solidphase 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. (AU)

Processo FAPESP: 09/01057-0 - Anatomia floral de espécies de Leguminosae com polinização noturna enfatizando os osmóforos
Beneficiário:Cristina Ribeiro Marinho
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 08/55434-7 - Estruturas secretoras em espécies vegetais de cerrado: abordagens morfológica, química e ecológica
Beneficiário:Silvia Rodrigues Machado
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático
Processo FAPESP: 12/16646-4 - Metabolômica e screening de interações ecoquímicas de plantas da subtribo Lychnophorinae (Asteraceae)
Beneficiário:Maria Elvira Poleti Martucci
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 08/57487-0 - Desenvolvimento floral em espécies de Leguminosae
Beneficiário:Simone de Pádua Teixeira
Linha de fomento: Auxílio à Pesquisa - Regular