![]() Plant Cell Physiol 48(7):958–970īartley GE, Scolnik PA (1995) Plant carotenoids: pigments for photoprotection, visual photoprotection, visual attraction, and human health. ![]() BMC Plant Boil 15(1):185–199īan Y, Honda C, Hatsuyama Y, Igarashi M, Bessho H, Moriguchi T (2007) Isolation and functional analysis of a MYB transcriptionfactor gene that is a key regulator for the development of red coloration in apple skin. Trends Plant Sci 13(3):99–102Īmpomah-Dwamena C, Driedonks N, Lewis D, Shumskaya M, Chen XY, Wurtzel ET, Espley RV, Allan AC (2015) The phytoene synthase gene family of apple ( Malus × domestica) and its role in controlling fruit carotenoid content. Biol Plant 53(2):223–228Īllan AC, Hellens RP, Laing WA (2008) MYB transcription factors that color our fruit. These results suggest that the regulatory genes MYB1-2 and bHLH33 prevent the accumulation of anthocyanins in sunburned apples by down-regulating the structural genes MdANR and MdFLS.Īhmed N, Maekawa M, Noda K (2009) Anthocyanin accumulation and expression pattern of anthocyanin biosynthesis genes in developing wheat coleoptiles. The expression of MdANR, MdFLS, MdUFGT2, MYB1-2, and bHLH33 decreased compared to controls. The PSY and PDS genes were up-regulated in sunburned apple fruits when the apples turned yellow, suggesting that the PSY and PDS genes could have very important roles in the regulation of the accumulation of the carotenoid in sunburn apples. Sunburned apples underwent changes in the genes for carotenoids and anthocyanins. Correspondingly, the apple peel color became light and yellow following sunburn. When sunburn occurred on the apple, the values of a* and a*/ b* were reduced, while L* and b* were augmented, and sunburn promoted carotenoid, phenolic and flavonoid synthesis while inhibiting the accumulation of chlorophyll and anthocyanins. The results showed that sunburn had a significant influence on the chlorophyll, anthocyanins, and carotenoids in apple fruit. Our research examined the changes in the content of the major pigments and the transcript levels of the carotenoid and anthocyanin biosynthetic genes. While the changes in the pigments contribute to fruit color, the mechanisms involved in the pigment biosynthesis that takes place during the development of the apple fruit sunburn are not well understood. Previous studies have shown that high temperature and strong light are the major causes for its occurrence and severity, and the color change of the peel is an obvious symptom of fruit sunburn. The effect of sunburn on apple fruit is important because the appearance reduces the market value.
0 Comments
Leave a Reply. |