Intraspecific variability of flavonoid glycosides and styrylpyrones from leaves of Cryptocarya mandioccana Meisner (Lauraceae)
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Chemical variability in populations of Cryptocarya mandioccana Meisner was investigated using chromatographic profiles of flavonoid glycosides and styrylpyrones from leaves of 57 trees from three sites in the Atlantic rain forest of São Paulo State - Brazil. The flavonoid profiles of the leaves from all trees were similar. However, four chemotypes were recognized by qualitative and quantitative differences in styrylpyrones. Chemotype F showed lower contents of these polyketides than chemotypes FS1, FS2 and FS3, which were characterized by styrylpyrones formed from different numbers of acetate units. Chemotypes with higher levels of styrylpyrones were more frequent in southern regions, with soils of higher K(+), Ca(2+) and Mg(2+) content. Soil and climate could indicate a genetic or environmental influence on styrylpyrones in leaves of C. mandioccana. (C) 2008 Elsevier Ltd. All rights reserved.