荔枝果实发育过程中果皮色素的变化

PIGMENT CHANGES IN LITCHI SKIN

摘要:

以妃子笑、糯米糍荔枝为材料，研究了二者果实发育过程中色素形成规律。结果表明：妃子笑、糯米糍果实发育生长曲线均呈单“S”型；妃子笑果实发育第Ｉ期比糯米糍短7-10 d；二者果实花青苷在发育期第Ｉ、ＩＩ期均有一个合成高峰；妃子笑的花青苷总体水平明显低于糯米糍；妃子笑、糯米糍花青苷合成与叶绿素含量虽不呈显著的相关性，但在果实发育后期花色苷合成迅速上升时，伴随着叶绿素含量的急剧下降；妃子笑、糯米糍的花色苷合成与苯丙氨酸解氨酶（PAL）活性变化不存在显著相关性。

Abstract:

Fruit development of litchi (Litchi chinensis Sonn.) and pigment change in skin ofcultivars ‘Feizixiao' and‘Nuomici' were studied. The fruit growth showed a sigmoidalpattern: the duration of the first phase in fruit growth of‘Nuomici' was 7 - 10 days longerthan that of‘Feizixiao '. A peak of anthocyanin synthesis appeared at the first and secondphases of fruit growth in both cultivars. The total anthocyanin level of ‘Feizixiao' wasobviously lower than that of ' Nuomici' . In 'Feizixiao' and ‘Nuomici' ，no obvious correlation was found between anthocyanin and chlorophyll co ntents． But the rapid decline in chlorophyll coincided with substantial increase in anthocyanin concentrations at late phase of fruit development. There was no clear correlation between the changes in anthocyanin synthesis and in phenylalanine ammonia lyase (PAL)activity．