Anatomy of stem and root of Ipomoea cairica (L.) Sweet (Convolvulaceae) - the Lianescent Vascular Syndrome

Anatomy of stem and root of Ipomoea cairica (L.) Sweet (Convolvulaceae) - the Lianescent Vascular Syndrome. Among the Ipomoea species of economic importance, the liana Ipomoea cairica stands out because of its great pharmacological potential. Considering that the cambial variant present in Ipomoea is not causally related to the habit, the aim of this study is to list the group of anatomical features that define the “lianescent vascular syndrome” in the species, as well as to verify if there is variation between the stem and the root anatomy. Transverse and longitudinal sections of fresh material were analyzed qualitatively and quantitatively. Thus, it was found that the anatomy of the secondary xylem of I. cairica is similar to that of other species of Ipomoea, including indistinct growth rings, diffuse and porous vessels mainly solitary, simple perforation plate, alternate bordered pit, tyloses, heterocellular mainly uniseriate rays, and non-lignified parenchyma. The characteristics of the “lianescent vascular syndrome” is related to the high percentage of parenchyma. However, statistical analysis showed differences between stem and root in vessel diameter and vessel frequency, with higher values of vessel diameter and lower values of frequency of vessels in the root secondary xylem. These differences must be related to the environment in which the organ develops, as well as to the mechanisms involved in water conduction. Specific studies will make possible to test this hypothesis

Extração com solvente e fluido supercrítico dos constituintes do caule subterrâneo de Spiranthera odoratissima A. St.-Hil. (Rutaceae)

O arbusto Spiranthera odoratissima (Rutaceae) foi coletado no município de Mucugê (BA). Seu caule subterrâneo foi submetido a extração com solvente orgânico e fluido supercrítico. A extração com CO2 supercrítico forneceu a 8-prenil-7-geraniloxicumarina. A partir do extrato CH2Cl2 isolou-se a cumarina aurapteno e identificou-se o alcalóide esquimianina. Estas substâncias foram identificadas com base na análise dos seus espectros de RMN 1H e 13C, IV e comparação com dados da literatura

FLORA FANEROGÂMICA DAS DUNAS E LAGOAS DO ABAETÉ, SALVADOR, BAHIA

As dunas do Abaeté localizam-se no limite dos municípios de Salvador e Lauro de Freitas, a ca. 12º56' S e 38º21’W. O ecossistema das dunas apresenta problemas para a sobrevivência das plantas, devido à escassez de nutrientes e a vários fatores que influem negativamente no balanço hídrico, como a baixa capacidade de retenção de água do solo, forte ação dos ventos marinhos, elevadas salinidade e insolação. Apesar disto, a flora das dunas apresenta elevada diversidade taxonômica com uma taxa expressiva de táxons endêmicos. Foram identificadas 410 espécies pertencentes a 283 gêneros de 88 famílias. As famílias mais importantes, em termos de número de espécies, são Leguminosae, Cyperaceae, Compositae, Rubiaceae e Gramineae

Variação sazonal da composição do óleo essencial de Myrcia salzmannii Berg. (Myrtaceae)

This work report the seasonal variation of composition of the volatile oils from leaves and from flowers of Myrcia salzmannii harvested in the sand dunes of Salvador, Bahia, northeastern region of Brazil in the years 2001 and 2003. The oils were analyzed by GC-FID and GC-MS being identified 49 components. Nine essential oil samples of leaves collected on different months and years and one sample of flowers were analyzed. β-Caryophyllene and α-humulene were the only compounds present in all of the samples being the first the majority compound

Revista Brasileira de Farmacognosia

P. 19-21.O arbusto Spiranthera odoratissima (Rutaceae) foi coletado no município de Mucugê (BA). Seu caule subterrâneo foi submetido a extração com solvente orgânico e fluido supercrítico. A extração com CO2 supercrítico forneceu a 8-prenil-7-geraniloxicumarina. A partir do extrato CH2Cl2 isolou-se a cumarina aurapteno e identificou-se o alcalóide esquimianina. Estas substâncias foram identificadas com base na análise dos seus espectros de RMN 1H e 13C, IV e comparação com dados da literatura.Maring

Química Nova

p. 2052-2055Phytochemical investigation of this species, popularly known as tinguaciba and used in traditional medicine to various diseases, resulted in the isolation of 15 substances: 2 alkaloids - norchelerythrine and arnottianamide; 1 lignan - sesamin; 4 terpenoids - citronellyl acetate, lupeol, α-bisabolol and spatulenol; 5 coumarins described for the first time - xanthotoxin, isopimpinelin, O-prenylumbelliferone, imperatorin and aurapten, 1 protoalkaloid - methyl N-methylanthranilate and 2 steroids - stigmasterol and β-sitosterol. The structures of the compounds were elucidated by spectroscopic analyses and compared with literature data.São Paul

Tetrahedron Letters

texto completo: acesso restrito. p. 7108–7112.Two novel polyprenylated phloroglucinol derivatives were isolated from the trunk of Kielmeyera lathrophyton (Clusiaceae). Lathrophytoic acid A presented an unusual caged carbon skeleton with a 1,3-dione-4-cyclopentanol moiety. Lathrophytoic acid B exhibited a highly substituted bicycle[3.3.1]non-ane skeleton and an isopropylfuran system which was formed by unusual cyclization of a prenyloxy side chain