Data di Pubblicazione:
2011
Citazione:
Primula spectabilis Tratt. aerial parts: morphology, volatile compounds and flavonoids / S. Vitalini, G. Flamini, A. Valaguzza, G. Rodondi, M. Iriti, G. Fico. - In: PHYTOCHEMISTRY. - ISSN 0031-9422. - 72:11-12(2011), pp. 1371-1378.
Abstract:
The vacuolar and epicuticular flavonoids and the volatiles of the leaves and parts of flower of P. spectabilis
Tratt., an endemic species in the Italian Oriental Alps, were investigated. From a MeOH extract of the
leaves two flavone glycosides, 8-C-b-glucopyranosylluteolin 7-O-a-arabinofuranoside (1) and 6-C-a-arabinofuranosylapigenin
(2) were isolated, in addition to a flavone and three flavonols already known from
species of Primula. From an EtOH extract of leaf exudates, 7,30,40-tri-O-methylquercetin was obtained. The
structures were elucidated on the basis of their 1D 1H- and 13C NMR data and 2D NMR techniques, as well
as of HPLC–MS. The volatiles emitted by the leaves were mainly constituted by non-terpene derivatives,
followed by comparable proportions of hemiterpens, oxygenated monoterpenes and sesquiterpene
hydrocarbons. In flowers, monoterpene hydrocarbons were the most represented chemical class followed
by non-terpene derivatives. Different proportions of compounds were found when individual parts of
flowers were examined separately; calyx produced a greater proportion (approx. 49.5%) of non-terpenes
as its volatile metabolites.
P. spectabilis has glandular trichomes in the hyaline margins of the epidermal depressions, distributed
on the adaxial leaf blade. Glandular hairs were also present on the corolla. Correlations of phytochemical
data with the morphological features of leaf, flower and glandular hair are discussed, and a hypothesis is
proposed on the ecological roles of the flavonoids and volatile compounds on the general fitness of the
species and cross-pollination strategies
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Apigenin C-glycoside; Flavonoids; Glandular trichomes; Luteolin C-glycoside; Morphology; Phytochemistry; Primula spectabilis; Primulaceae; Volatile compounds
Elenco autori:
S. Vitalini, G. Flamini, A. Valaguzza, G. Rodondi, M. Iriti, G. Fico
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