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Acerola's clones of industrial interest

Mota, J.C. da, Assis, S.A. de, Pecin, J., Lima, G. de, Martins, A.B.G., Oliveira, M.M. de F.
Journal of food biochemistry 2005 v.29 no.1 pp. 99-107
variety trials, chemical composition, plant genetics, pectins, pectinesterase, nutritive value, agronomic traits, fruit quality, pH, Malpighia emarginata, temperature, enzyme activity, cloning (plants), ascorbic acid
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.