PG、ACC、乙烯对番茄果实成熟的影响

Effect of PG Activity, ACC and Ethylene Production in Fruit Ripening of Tomato

番茄果实在成熟过程中硬度下降迅速，ＰＧ活性急剧上升，表现出显著的负相关；用ＡＣＣ和乙烯利处理绿熟期果实，结果乙烯促进了正常番茄和ａｌｃ番茄果实成熟进程，其ＰＧ活性也升高，而外源乙烯和ＡＣＣ不影响ｎｏｒ基因突变体果实的成熟进程。ＡＣＣ和ＰＧ无直接关系。

Changes in ethylene production, ACC content, PG activity and firmness were measured in fruit ripening processes of three tomato (Lycopersicon esculentum Mill.) varieties (nor. alc. normal). The results indicated that fruit firmness of normal tomato '524 Da Hong' declines markedly in accompany with increasing of PG activity. Fruits of mature green were treated by exo-ACC and ethrel. These results are that ethrel and exo-ACC advance fruit ripening of normal tomato (524 Da Hong) and 'alc' tomato.Ethylene is one of the main factors which regulate PG activity. ACC's effects on fruit ripening probably are taken by converted to ethlyene; However,Ethylene and ACC have no effects on regulating PG activity and advancing fruit ripening of the mutant 'nor'. ACC doesn't relate to PG directly.