Relation between Ascorbic Acid Contents and Activities of Related Enzymes in Product Organ of Different Vegetable Species

The product organs of sweet pepper,tomato,potato,radish and cucumber that AsA contents have significant difference were used to investigate the relation between AsA contents and relative enzymes activities at different development stages.The results showed that changes of AsA contents were accordant with GalLDH and DHAR activities in product organs at different development stages.Correlation between AsA contents and relative enzymes activities at anaphase of product organs showed that AsA contents and DHAR activities were significantly positively correlated(r=0.9423,P0.05),AsA contents and GalLDH activities were considerably positively correlated(r=0.8597,P0.10),AsA+DHA contents had clear pertinence with GalLDH activities(r=0.7904,P0.15),but AsA contents had no clear pertinence with MDHAR,AAO and APX activities.It is proposed that AsA contents were strongly affected by the GalLDH and DHAR activities,but MDHAR,AAO and APX activities were not the main factors in influencing the AsA contents in product organs of different vegetable species.