01521naa a2200277 a 450000100080000000500110000800800410001902200140006010000180007424501160009226000090020852007330021765000240095065300160097465300140099065300120100465300240101665300230104065300100106365300230107370000170109670000200111370000190113370000170115277300740116916360692001-06-12       2000    bl uuuu     u00u1 u    #d  a1020-33621 aSHARMA, R. R.  aPolyphenol oxidase activity as an index for screening mango (Mangiferaindica L.) germplasm against malformation  c2000  aCatecholase and cresolase (PP0) enzyme activity and phrnolic conyent were measured in 24 mango varieties in newly emerged vegetative growth during the September-October flush in 1997 and 1998. Incidence of malformation was recorded in March-Aoril 1998 and 1999. Enzyme activity and phenolic content varied widely among varieties, and was highest in 'Bhadauran' and lowest in 'Tommy Atkins'. Floral malformation incidencewas highest (53.75%) in 'Tommy Atkins'and lowest in 'Bhadauran'(1.10%). A strong positive correlation was found between the incidence of floral malformation and both enzyme activity and phenolic content. Thus PPO activity can be used as a biochemical index for screening mango germplasm against malformation.  agermplasm screening  aCatecholase  aCresolase  aEx situ  aFloral malformation  aMangifera indica L  amango  aPolyphenol oxidase1 aSINGH, C. N.1 aCHHONKAR, O. P.1 aGOSWAMI, A. M.1 aSINGH, S. K.  tPlant Genetic Resources Newsletter, Rome, Italygn.124, p.41-43, 2000