1998
DOI: 10.1016/s0031-9422(98)00438-5
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Possible protective role for 3′,4′-dihydroxyflavones induced by enhanced UV-B in a UV-tolerant rice cultivar

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Cited by 131 publications
(94 citation statements)
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“…Existe uma correlação positiva bem estabelecida entre intensidade de radiação solar e produção de compostos fenólicos 101 , tais como flavonóides 99,103,104 , taninos 94,105 e antocianinas 18,106,107 . Isso pode ser explicado, principalmente no caso de flavonóides e fenilpropanóides correlatos, pela proteção contra a foto-destruição proporcionada por estes metabólitos ao absorver e/ou dissipar a energia solar, dificultando assim a danificação dos tecidos mais internos pela radiação UV-B 101,[108][109][110] .…”
Section: Radiação Ultravioletaunclassified
“…Existe uma correlação positiva bem estabelecida entre intensidade de radiação solar e produção de compostos fenólicos 101 , tais como flavonóides 99,103,104 , taninos 94,105 e antocianinas 18,106,107 . Isso pode ser explicado, principalmente no caso de flavonóides e fenilpropanóides correlatos, pela proteção contra a foto-destruição proporcionada por estes metabólitos ao absorver e/ou dissipar a energia solar, dificultando assim a danificação dos tecidos mais internos pela radiação UV-B 101,[108][109][110] .…”
Section: Radiação Ultravioletaunclassified
“…In general, plants accumulate flavonoids in vacuoles as O-glycoside derivates; however, bryophytes, ferns, gymnosperms, and several angiosperms also produce flavonoid C-glycosides (10,11). In particular, cereals like wheat, rice, and maize mainly accumulate C-glycosyl flavones that are involved in protection against UV-B radiation and defense against pathogens (12)(13)(14). For example, maysin, the C-glycosyl flavone predominant in silk tissues of some maize varieties, is a natural insecticide against the corn earworm Helicoverpa zea (15,16), whereas C-glycosyl flavonoids identified in cucumber leaves act as phytoalexins in defense against powdery mildew fungi (17,18).…”
Section: Flavonoids Accumulate In Plant Vacuoles Usually As O-glycosymentioning
confidence: 99%
“…UV−absorbing compounds play a very important role in plant kingdom and one of the many roles of these compounds appear protective to organisms from harmful effects of UV−B radiation by means of their direct absorption of these wavelengths. However, recent evidence suggests that some of the phenolic compounds may contribute to the decrease in active oxygen species by acting as antioxidants (Husain et al 1987;Foyer et al 1994;Markham et al 1998;Olsson et al 1998;Ryan et al 2002). In this paper we have studied two Antarctic lichens: Dermatocarpon sp.…”
Section: Introductionmentioning
confidence: 99%