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Pectic polysaccharides of mango (Mangifera indica L): structural studies

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JSFA-12-04
 
Title Pectic polysaccharides of mango (Mangifera
indica L): structural studies
 
Creator Prasanna, Vasu
Prabha, T. N.
Tharanathan, R. N.
 
Subject 06 Mango
14 Physical properties
 
Description Pectic polymers of raw and ripe mango fruits revealed several distinct fractions upon
diethylaminoethyl-cellulose chromatography. Fraction I, the arabinogalactan, had a relative ratio of
3:1 for galactose and arabinose, while the two rhamnogalacturonans (fractions II and III) were composed
of galacturonic acid, arabinose, galactose and rhamnose in the relative ratios of 69:15:14:2 and 62:10:23:4,
respectively. Specific rotation, FTIR, GC-MS and NMR data revealed fraction I to be a 1→5-α-L
arabinofuranan linked to themain chain of 1→4-β-D-galactopyranan through 1→3 linkages. The carboxylreduced
fraction II had 1→4-α-D galactopyranuronic acid residues in the main chain, which were further
involved in branching through rhamnose. The striking drop in their abundance and Mr at the end of
ripening, denoting depolymerization in situ, is discussed in the context of textural softening.
 
Date 2004
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://ir.cftri.com/1766/1/J_Sci_Food_Agric_84_1731-1735_%282004%29.pdf
Prasanna, Vasu and Prabha, T. N. and Tharanathan, R. N. (2004) Pectic polysaccharides of mango (Mangifera indica L): structural studies. Journal of the Science of Food and Agriculture, 84. pp. 1731-1735.