UV irradiance increases development of red skin color and anthocyanins in 'Hakuho' peach
2004
Kataoka, I. | Beppu, K.
The contribution of the UV light component on the skin coloration was determined in 'Hakuho' peach. Detached fruit partially covered with a UV-proof polyvinylchloride (PVC) film and a polyethylene film were exposed to sunlight for 4 days. Red coloration of the fruit and anthocyanin content in the skin were considerably reduced with the UV-proof PVC film. Irradiation with a UV fluorescent lamp at 3.58 W.m(-2) markedly enhanced the red color development, while white fluorescent light at 120 micromol.m(-2).s(-1) did not affect the coloration. UV irradiation also increased the anthocyanin content in the cultured skin discs with increasing irradiance up to above 7.3 W.m(-2). These results suggest that the UV component contributes significantly to the enhancement of the fruit coloration by sunlight exposure.
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