巨峰葡萄色素发育的若干规律

Some Rules of Oenin Development of Jufeng Grape Fruits

葡萄色泽取决于葡萄色素苷含量。巨峰葡萄色素苷在果粒软化前增长甚慢,软化时开始上色,至纵、横径停止生长后增长加快。还原糖含量与葡萄色素苷呈极显著的指数函数曲线相关.还原糖达10.23％开始上色。生长素、赤霉素、细胞分裂素活性降低是着色的根本原因.乙烯利具有催色作用。气候条件可影响果粒软化期及着色的程度.直射光有利着色.

The colour substance of grape fruit mainly is ocnin. Ocnin content in Jufeng grape fruits increases slowly before fruit softening, grape fruits begin to colour at softening, after fruits stop getting bigger fruits colour very fast. There is significant corrclation between reducing sugar and oenin. Grape fruit colours when reducing sugar content increases to 10.23％. It is main cause of fruit colouring that the activity or auxin, gibbercellin and kinetin decrease Ethrel come into action in colouring. It can be seen that climatie conditions affect softening and colouring of fruit. Direct sunlight is helpful to colouring of fruits.