Abstract
To investigate the ascorbic acid (AsA) content of different varieties of red-fleshed kiwifruit, four kinds of red flesh kiwifruit were used as materials to determine the content of AsA and glutathione (GSH). Results showed that there were significant differences not only in the contents of AsA and GSH but also the ratio of AsA/DHA and GSH/GSSG in flesh of 4 kiwifruit genotypes. T-AsA and AsA levels of ‘Hongshi 2’ were higher than those of other red-fleshed kiwifruits, as well as its ratio of AsA/DHA was the highest. And ‘808’ had the highest ratio of GSH/GSSG which was 24 times of the ‘Hongshi 2’. Besides, ‘Hongshi 2’ contained the highest contents of T-GSH in flesh whereas the lowest values were measured from ‘Tetra-Chine’. ‘808’ contained the highest GSH content which was 3.29 times of ‘Hongshi 2’. All of these results indicated that higher efficiency AsA-GSH cycle was likely to be responsible for the higher AsA accumulation in flesh of kiwifruit.
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