Abstract

Summary Young fruit abscission in mango was found to be associated with an increased polyphenol oxidase activity, similar to the response of peroxidase activity, for both Haden and Sensation cultivars. The former, which is more prone to abscission, also had a higher activity for both enzymes compared with the latter cultivar. Ethylene production was increased in the abscised fruit of the Haden cultivar only. The possible association with phenol synthesis and the phenylalanine ammonia-lyase enzyme is discussed.

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