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Acerola's clones of industrial interest

Author:
Mota, J.C. da, Assis, S.A. de, Pecin, J., Lima, G. de, Martins, A.B.G., Oliveira, M.M. de F.
Source:
Journal of food biochemistry 2005 v.29 no.1 pp. 99-107
ISSN:
0145-8884
Subject:
variety trials, chemical composition, plant genetics, pectins, pectinesterase, nutritive value, agronomic traits, fruit quality, pH, Malpighia emarginata, temperature, enzyme activity, cloning (plants), ascorbic acid
Abstract:
In order to know which clone of acerola is better for acerola industrialization, we studied the pectin methylesterase (PME) specific activity, pectin content and vitamin C content in five different clones of acerola. The pectin yield varied from 1.37 to 2.99% and the highest content of pectin occurred in clones 3 and 5. Ascorbic acid varied significantly from 1157.5 to 1735.5 mg/100 g of pulp in the five clones. The highest content of vitamin C occurred in clone 4. The PME specific activity varied from 0.79 to 2.92 units g-1/g of pulp and the highest values occurred in clone 2. We also studied the optimum temperature and the optimum pH of this enzyme. Clones 1, 2, 4 and 5 showed optimum temperature at 90C. Clone 3 showed practically the same specific activity at all temperatures studied. Clones 1 and 4 showed an optimum pH of 9.0 and clone numbers 2, 3 and 5 showed a pH optimum at 8.5.
Agid:
1413380