Chemical composition of flavonoids and styrylpyrones and the genetic variability of isozymes in natural populations of Cryptocarya mandioccana Meisner (Lauraceae)

Autor(es)

Moraes, Pedro L. R. de ; Nehme, Claudia J. ; Alves, Marcelo C. ; Derbyshire, Maria Teresa V. C. ; Cavalheiro, Alberto J.

• Tipo de documento: Artigo Científico
• Fonte: Biochemical Systematics and Ecology; v. 35, n. 4, p. 233-244, Apr. 2007.
• Área do conhecimento: Ciências Exatas e da Terra - Química
• Assunto(s): Fármacos Clusterina Cryptocarya Flavonoides Variação genética Isoenzimas

Resumo

The chemical composition of leaves of 57 trees of Cryptocarya mandioccana from three populations of southeastern Brazil was investigated through HPLC, assaying six flavonoids, seven styrylpyrones, and seven unidentified compounds. From 51 of the former trees, genotypes were obtained from 40 polymorphic loci of 19 isozymes. Cluster analyses of the phytochemical and genetical variation revealed that trees exhibited four chemotypes and five clusters from isozymes, respectively. Discriminant analyses from selected variables of the isozymic and chemical data sets were performed, respectively, in relation to the four chemotypes and the five isozyme clusters. The classification of individuals presented respective error estimates of 9.16% and 13.57%, indicating that the genetic data could explain the clusters from chernotypes and vice versa at acceptable error levels. Linear regressions with Dummy variable showed significant association of locus Skdh-2 with quercetin-3-O-beta-D-glucopyranoside and cryptofolione, indicating that its alleles would be responsible for the chemotype variation between individuals. (AU)

• Processo FAPESP: 99/05818-2 - Estrutura genética de populações naturais de Cryptocarya spp. (Lauraceae) através de marcadores isoenzimáticos e de DNA
• Beneficiário: Maria Teresa Vitral de Carvalho Derbyshire
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular
• Processo FAPESP: 99/05004-5 - Estrutura genética de populações naturais de Cryptocarya spp. (Lauraceae) através de marcadores isoenzimáticos e de DNA
• Beneficiário: Pedro Luís Rodrigues de Moraes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 96/10470-7 - Estudo da variacao sazonal e populacional de metabolitos secundarios em especies de cryptocarya (lauraceae).
• Beneficiário: Alberto Jose Cavalheiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 98/03012-8 - Estudo da variação sazonal e populacional de metabólitos secundários em folhas de Cryptocarya moschata (Lauraceae).
• Beneficiário: Claudia Joseph Nehme
• Modalidade de apoio: Bolsas no Brasil - Doutorado