Dynamic Comparison Between Sanyuehong and Baitangying Litich(Litchi Chinesis Sonn.)in Pericarp Color Changes

In order to study discordant development between pericarp color and flesh sweetness of Sanyuehong litich fruits, dynamic comparison was conducted between Sanyuehong and Baitangying litich.The results in avalue showed that the date of pericarp color turned into complete red was 13 days for Sanyuehong litich but it was 7 days for Baitangying litich in rapidly coloring.However, the results in h values revealed that the pericarp of Sanyuehong litich was quick coloring within 10 days before full red but it of Baitangying litich was 11 days before the pericarp full colored.The date of sugar/acids ratio in flesh reached to peak was 24 days earlier in Sanyuehong litich than in Baitangying litich.During the pericarp coloring, the anthocyanin content in the pericarp was increase in two cultivars but the contents of their chlorophyll tended to decrease.Linear correlations of anthocyanin content with a value and h value in the pericarp were positive and negative, respectively, and showed same in two cultivars.The results also showed that, on Sanyuehong litich, the development of pericarp coloring lagged 6 days behind the development of flesh sweetness because the anthocyanin content in pericarp was low.On Baitangying litich, the developments of pericarp coloring and flesh sweetness showed in same rates.Therefore, when the Sanyuehong litich pericarp was turned into complete red, the increase of acid content in flesh resulted in its sour flavor.