INQUINOA   21218
INSTITUTO DE QUIMICA DEL NOROESTE
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Modeling photoprotection in Andean plants: deactivation pathways of the excited-states of main flavonoids present in Zuccagnia punctata Cav.
Autor/es:
MARTIN, MARCELA V.; MORÁN VIEYRA, FAUSTINO E.; BORSARELLI, CLAUDIO
Lugar:
Mendoza
Reunión:
Conferencia; 21st Inter-American Photochemical Society Conference; 2011
Institución organizadora:
Inter-American Photochemical Society
Resumen:
Sunlight irradiance is of major importance for all living organisms, in particular as main source of energy for plants and the majority of bacteria. However, an increment of the input of the sunlight irradiation, especially of the ultraviolet radiation (UV), can affect seriously the cellular systems and compromise the survival of several species. In recent decades, the amount of UV radiation that penetrates the earth´s surface has increased from 1% to 3% per year due to the alarmingly weakening of the O3 layer. Considering that UVA represents >95% of the UV radiation incident on the Earth?s surface, in the present work we explore the photophysical and photochemical properties of the flavonoids present in the leaves of the Andean shrub Z. punctata: 7-hydroxyflavanone (7HF), 2?,4?-dihydroxychalcone (DHC), and 3,7-dihydroxyflavone (DHF) in solution upon UVA excitation in order to characterize the deactivation pathways of their excited states and evaluate their functionality as photoprotective biocompounds.