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1.
An. acad. bras. ciênc ; 83(4): 1165-1170, Dec. 2011. ilus, tab
Article in English | LILACS | ID: lil-607420

ABSTRACT

Plumbago scandens L. is a Brazilian tropical/subtropical species that occurs along the coast. Chemically it is mainly represented by naphthoquinones, flavonoids, terpenoids and steroids. The aim of the present work is to study quantitative changes in the root metabolic production of Plumbago scandens during different physiologic developmental stages relative to floration. The results indicated the presence of four substances in the extracts: plumbagin, epi-isoshinanolone, palmitic acid and sitosterol, independent on developmental stage. The naphthoquinone plumbagin has always showed to be the major component of all extracts. Naphthoquinones exhibited their highest content during floration, while the content of the two others components decreased during this stage, revealing an inverse profile. The chemical composition changed depending on the plant requirements.


Plumbago scandens L. é uma espécie brasileira tropical/subtropical que ocorre ao longo da costa. Quimicamente, é principalmente representada por naftoquinonas, flavonóides, terpenóides e esteróides. objetivo do presente trabalho é estudar mudanças quantitativas da produção metabólica nas raízes de Plumbago scandens durante diferentes estágios de desenvolvimento fisiológico, relativos à floração. Os resultados indicaram a presença de quatro substâncias nos extratos: plumbagina, epi-isoshinanolona, ácido palmítico e sitosterol, independente do estágio de desenvolvimento. A naftoquinona plumbagina tem sempre mostrado ser o componente majoritário de todos os extratos. Naftoquinonas exibiram seus maiores conteúdos durante a floração, enquanto o conteúdo dos dois outros componentes decresceu durante este estágio, revelando um perfil inverso. A composição química modificou dependendo das necessidades da planta.


Subject(s)
Naphthoquinones/chemistry , Palmitic Acid/chemistry , Plant Roots/chemistry , Plumbaginaceae/chemistry , Sitosterols/chemistry , Tetrahydronaphthalenes/chemistry , Chromatography, Gas , Naphthoquinones/metabolism , Palmitic Acid/metabolism , Plant Roots/growth & development , Plant Roots/metabolism , Plumbaginaceae/growth & development , Plumbaginaceae/metabolism , Sitosterols/metabolism , Tetrahydronaphthalenes/metabolism
2.
Indian J Biochem Biophys ; 1991 Apr; 28(2): 150-4
Article in English | IMSEAR | ID: sea-28906

ABSTRACT

Transformation of sitosterol to androsta-1, 4-diene-3, 17-dione was studied with Mycobacterium cells entrapped in various polymeric matrices. Of the three supports viz. alginate, carageenan, agarose and polyacrylamide, studied, the polyacrylamide immobilized cells showed optimum catalytic stability and reusability.


Subject(s)
Androstadienes/metabolism , Biotransformation , Kinetics , Mycobacterium/metabolism , Sitosterols/metabolism
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