Anthocyanins (Anthocyanidin), also known as anthocyanin, is widely found in nature, a kind of water-soluble natural plant pigments, is a flavonoid compound. Also colorful colors plants petal major coloring matter, fruits, vegetables, flowers, and most related to. Anthocyanins present in the plant cell vacuoles, can be transformed from chlorophyll. In plant cell vacuoles of different pH values, so that presents colorful petal color. Autumn soluble sugar increased, the cells are acidic, under acidic conditions red or purple, so the petals reddish, purple anthocyanins effect, its depth and color of anthocyanin content was positively correlated, fast spectrophotometer measured in blue under alkaline conditions. Anthocyanin color is affected by many factors, temperature, oxygen and phosphorus deficiency and other adverse environment will promote the formation and accumulation of anthocyanins.
