Catecholase and cresolase activities and phenolic content in mango (Mangifera indica L.) at panicle initiation.
Sharma R. R., Goswami A. M., Singh C. N., Chhonkar O. P., Gyanendra Singh
Author Affiliation: Division of Fruits and Horticultural Technology, Indian Agricultural Research Institute, New Delhi 110012, India.
Scientia Horticulturae 87 : 147-151
Abstract : Catecholase [catechol oxidase] and cresolase [monophenol monooxygenase] (PPO - polyphenol oxidase) enzyme activities and phenolic content were measured in different mango cultivars (Eldon, Sensation, Tommy Atkins, Langra, Chausa, Dashehari, Amrapali, Mallika and Bhadauran) at panicle initiation. Enzyme activity and phenolic content varied widely amongst the eight cultivars, the maximum values being in Bhadauran and minimum values in Tommy Atkins. Floral malformation incidence was maximum (53.75%) in Tommy Atkins and minimum in Bhadauran (1.10%). A strong negative correlation was found between both the enzyme activity, phenolic content at panicle initiation and the incidence of floral malformation. Thus, PPO activity and level of phenolic compounds at panicle initiation may give a possible estimate of malformation incidence in mango.