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Biochemical characterization of sap (latex) of a few Indian mango varieties

Saby John, K. and Bhat, S. G. and Prasada Rao, U. J. S. (2002) Biochemical characterization of sap (latex) of a few Indian mango varieties. Phytochemistry, 62. pp. 13-19.

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Abstract

Mango sap (latex) from four Indian varieties was studied for its composition. Sap was separated into non-aqueous and aqueous phases. Earlier, we reported that the non-aqueous phase contained mainly mono-terpenes having raw mango aroma (Phytochemistry 52 (1999) 891). In the present study biochemical composition of the aqueous phase was studied. Aqueous phase contained little amount of protein (2.0–3.5 mg/ml) but showed high polyphenol oxidase (147–214 U/mg protein) and peroxidase (401–561 U/mg protein) activities. It contained low amounts of polyphenols and protease activities. On native PAGE, all the major protein bands exhibited both polyphenol oxidase and peroxidase activities. Both polyphenol oxidase and peroxidase activities were found to be stable in the aqueous phase of sap at 4 oC. Sap contained large amount of non-dialyzable and non-starchy carbohydrate (260–343 mg/ml sap) which may be responsible for maintaining a considerable pressure of fluid in the ducts. Thus, the mango sap could be a valuable by-product in the mango industry as it contains some of the valuable enzymes and aroma components.

Item Type: Article
Uncontrolled Keywords: Mango; Sap; Polyphenol oxidase; Peroxidase; Carbohydrate; Polyphenols; Protein
Subjects: 600 Technology > 08 Food technology > 24 Fruits > 06 Mango
500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 01 General Chemistry
Divisions: Dept. of Biochemistry
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 24 Sep 2007 11:19
Last Modified: 05 Oct 2018 08:20
URI: http://ir.cftri.com/id/eprint/1428

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