彩色辣椒果實轉色過程中色素及基因表現之變化

摘要

The colored chili pepper (Capsicum annum L.) is native to Central and South America, and belongs to Solanaceae family and Capsicum genus. Colored chili pepper is unique in the colors transition from pale green, purple, orange, to red within 15 to 20 days. Our studies indicated that the colors transition of the chili pepper fruits was probably not related to the pH of fruit sap. The results of the measurements of total anthocyanins and carotenoids contents, and the expression of psy and lcy-b genes indicated that a dramatic shit from anthocyanins metabolism to carotenoids biosynthesis occurred during the purple color transformed into orange color of chili pepper fruit. Changes in the profiles of protein synthesis and the populations of translatable mRNA of chili pepper fruits were also found during colors transition. Our results reveal that the regulation of genes expression was involved during colors transition of chili pepper fruits.