ABSTRACT
To investigate the chemical constituents of the leaves of Adinandra nitida, several column chromatography methods were used to isolate the chemical constituents of this plant. The structures were elucidated on the basis of spectral data. Six compounds were isolated and identified as 2alpha, 3alpha, 19alpha-trihydroxy-olean-12-en-28-oic acid-28-O-beta-D-glucopyranoside (1), arjunetin (2), sericoside (3), glucosyl tormentate (4), nigaichigoside F1 (5) and arjunglucoside I (6), separately. Compound 1 is a new compound, and compounds 2 -6 were isolated from A. nitida for the first time.
Subject(s)
Glucosides , Chemistry , Molecular Structure , Oleanolic Acid , Chemistry , Plant Leaves , Chemistry , Plants, Medicinal , Chemistry , Saponins , Chemistry , Theaceae , ChemistryABSTRACT
Herbivore leaf consumption of various mangrove species in relation to environmental factors and leaf hardness were studied in the Dagua river estuary, Colombia. Leaf consumption and damage were assessed by measuring the percentage of area attacked by herbivores, distinguishing between consumption and damage. The species that suffered the highest consumption, such as Avicennia germinans (Avicenniaceae) and Laguncularia racemosa (Combretaceae), had softer leaves and less herbivore species when compared with Rhizophora spp. (Rhizophoraceae) and Pelliciera rhizophorae (Theaceae). The abundance and diversity of leaf grazing and its variability among mangrove species in the Dagua River estuary, show the importance of the trophic dynamics of live vegetable matter, in spite of their relatively low contribution to removing organic matter.
Se estudió el consumo foliar por herbívoros en hojas de varias especies de mangle con relación a los factores ambientales y la dureza de las hojas en el estuario del río Dagua. La intensidad del consumo o de los daños producidos en las hojas se cuantificó determinando el porcentaje de área foliar afectado por herbívoros separando las distintas señales de consumo o daño de las hojas. Las especies más consumidas, como A germinans y L. racemosa, presentan el menor número de tipos de huellas de daños y menor dureza que las especies menos consumidas como Rhizophora sp. y P. rhizophorae. La abundancia y diversidad de huellas de ataque por herbívoros y su variabilidad a lo largo del estuario del río Dagua, muestra la importancia de los procesos de consumo de tejido vegetal vivo en el bosque de manglar dentro de la red trófica del sistema estuarino.