MORPHOLOGYAND ANATOMYOFTHE DEVELOPING FRUITOFMACFADYENA UNGUIS-CATI (L.) A.H.GENTRY, BIGNONIACEAE

RESUMENMacfadyena unguis-cati es una liana que produce frutos similares a legumbres, condos carpelos y semillas aladas. La diversidad en el tipo de cápsula y los pocos estudios en lassemillas de Bignoniaceae motivaron la ejecución de este trabajo. Se analizaron las flores yfrutos en distintas fases de desarrollo, según las técnicas usuales de anatomía vegetal. El frutoes una cápsula con dehiscencia septífraga asociada con dehiscencia septicida. En preantesisse forma un meristema en la región media del mesofilo del ovario. La semilla se origina de unóvulo anátropo, unitegumentado, tenuinucelado y endotelial. La semilla madura es exotestaly presenta poco endosperma y un embrión recto.ABSTRACTMacfadyena unguis-cati is a species of liana that produces pod-like fruits consisting oftwo carpels and bearing winged seeds. This study was motivated by the diversity of capsuletypes and the few seed studies conducted in Bignoniaceae. Flowers and fruits in different developmentstages were structurally analyzed, following standard plant anatomical techniques.The fruit is a capsule with septifragal dehiscence associated with a septicidal dehiscence.During pre-anthesis, a meristem is formed in the middle region of the ovary mesophyll.The seed originates from an anatropous, unitegmic, tenuinucellate and endothelial ovule. Themature seed is exotestal and presents little endosperm and a straight embryo

Morphological and anatomical features of the flowers and fruits during the development of Chamissoa altissima (Jacq.) Kunth (Amaranthaceae)

The morphology and structure of the flowers and fruits of Chamissoa altissima (Jacq.) Kunth during the development were analyzed. The plant material was fixed in FAA 50, embedded in historesin and sectioned according to standard techniques. The flowers presented tepals with betalain and homogeneous mesophyll; receptacular nectary; anthers with epidermis, endothecium, one middle layer, and uninucleate tapetum; and monocarpelar ovary with homogeneous mesophyll. The fruit was a circumscissile capsule, presented the same number of cellular layers that the ovary, and possessed subendocarpic sclerenchyma. The seed was bitegmic, exotestal and perispermic.Chamissoa altissima (Jacq.) Kunth ocorre em remanescentes florestais de Maringá, Paraná, Brasil e se destaca por seus frutos zoocóricos envolvidos por sépalas vermelhas. As flores e frutos em diferentes fases de desenvolvimento são descritos estruturalmente. O material botânico foi fixado em FAA 50, emblocado em historresina e secionado conforme técnicas usuais. As flores apresentam sépalas com betalaína e mesofilo homogêneo; nectário receptacular; anteras com epiderme, endotécio, uma camada média e tapete uninucleado; e ovário monocarpelar com mesofilo homogêneo. O fruto é uma cápsula circuncisa, apresenta o mesmo número de camadas celulares que o ovário, e possui esclerênquima subendocárpico. A semente é bitegumentada, exotestal e perispérmica

Prenylated flavonoids from maclura tinctoria fruits

A phytochemical investigation of Maclura tinctoria fruits yielded five flavonoids, including one prenylated flavonol (licoflavonol) and four prenylated isoflavones (wighteone, derrone, alpinum isoflavone, and 6-(2,2-dimethyl-2H-chromen-6-yl)-2-(1-hydroxy-1-methylethyl)-2,3-dihydro-5H-furo[3,2-g]chromen-5-one). The structures of the isolates were established by analyzing their spectroscopic data. Compound 6-(2,2-dimethyl-2H-chromen-6-yl)-2-(1-hydroxy-1-methylethyl)-2,3-dihydro-5H-furo[3,2-g]chromen-5-one is new and the other isolates are described for the first time in this species