INQUINOA   21218
INSTITUTO DE QUIMICA DEL NOROESTE
Unidad Ejecutora - UE
artículos
Título:
Histochemical localization and characterization of chalcones on the foliar surface of Zuccagnia punctata Cav. Insights into their physiological role
Autor/es:
MARÍA ALEJANDRA MORENO; MARÍA INÉS MERCADO, GABRIELA NUÑO, IRIS CATIANA ZAMPINI, ANA SOLEDAD CUELLO, GRACIELA INÉS PONESSA, JORGE ESTEBAN SAYAGO, MARÍA INÉS ISLA
Revista:
PHYTOCHEMISTRY LETTERS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2015
ISSN:
1874-3900
Resumen:
Dihydroxychalcones as well as other metabolites synthesized via the phenylpropanoid pathway have a wide range of biological activities. Although this class of phenolic compounds is found in very large amounts in some tissues, their physiological significance remains unclear. This approach focused on the chemical analysis of Zuccagnia punctata leaf rinse extract in which dihydroxychalcones (99.25 mg 20,40-dihydroxychalcone/cm2 and 73.38 mg 20,40 dihydroxy-30-methox- ychalcone/cm2) are the main constituents. Histochemical analysis (fluorescence microscope and emission scanning electron microscope coupled with an energy dispersive X-ray spectrometer) revealed a highflavonoid concentration on the foliar surface. The high accumulation of phenolic compounds, flavonoids or chalcones in the cuticle of Z. punctata leaves would act as defense mechanisms against UV radiation for the protection of photosynthetic tissues against oxidative stress.