Seasonal variation of the flavonoids pinocembrin and 3-o-methylgalangin, in the surface component mixture (resinous exudates and waxy coating) of heliotropium stenophyllum

• BRENDA MODAK ^[1] ; RENÉ TORRES ^[1] ; ALEJANDRO URZÚA ^[1]
  1. [1] University of Santiago de Chile Faculty of Chemistry and Biology Department of Environmental Sciences
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 56, Nº. 1, 2011, págs. 532-534
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • In this report we study the seasonal variation of the flavonoids pinocembrin and 3-O-methylgalangin in the surface component mixture (resinous exudate and waxy coating) of Heliotropium stenophyllum. The quantitative analysis of the flavonoids was performed using high-performance liquid chromatography of samples collected monthly over a whole year. The results showed an increase in the spring and summer yield of surface components and a decrease during the winter. Although the sum of pinocembrin and 3-O-methylgalangin did not follow a pattern related with hydric stress, UV radiation or high temperature during the year, a relationship between pinocembrin and 3-O-methylgalangin was found. On average during the months of September to August, excluding March, the amount of pinocembrin decreased wile the amount of 3-O-methylgalangin increased. The results suggest that the above compounds may play different ecophysiological functions during plant development and are consistent with the biosynthetic relationship between the two compounds.