褐变葡萄果肉褐变在不同品种上的表现不同,红色品种褐变表现为果实色泽发暗,一些白色品种更易显现,如牛奶、无核白、意大利、白马拉加等欧洲种的脆肉型品种。这类品种在贮藏后期也易出现果肉内部褐变。一般是从维管束开始褐变向果肉扩展。这类品种的果实中通常有较高含量的多酚氧化酶。贮藏期,应 Browning brown grapes on the performance of different varieties of different performance of the brown varieties of brown reddish brown fruit color, some white varieties easier to show, such as milk, seedless white, Italy, white Malaga and other European species of crisp meat Variety. These kinds of varieties are also prone to internal browning of the pulp in the late storage. Browning usually starts from the vascular bundle to expand the pulp. The fruits of these varieties usually have higher levels of polyphenol oxidase. Storage period, should