BIOCHEMICA L ANALYSI S O F PIGEONPE A (Cajanu s caja n (L. ) Millsp ) CULTIYAR S DIFFERIN G I N REACTIO N T O PO D BORE S Heliothi s armiger a (Hubner ) DAMAG E

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Date
1993
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MPKV, UNIVERSITY LIBRARY RAHURI
Abstract
Some biochemical parameters associated with the pod borer Helioth is armiqera (Hubner) resistance of piqeonpea cultivars, with a varying maturity and deqree of succeplibj1ity to pod borer, were studied at two qrowth staqes. The pods of twelve varieties of pigeonpea, viz., 1CPL-87, UPAS 120, TAT-10, ICPL 151 (early), PT 2U-10, PT 20-3, TV-1, PI' 17-2 (Midlate) and PT 25, C-11, PI 35, N-290-21 (late) were analysed at two qrowth staqes viz. green pod staqe and mature pod stage. The contents of nitrogen, protein, reducing and total sugars, phosphorus and potassium were higher in piqeonpea pods susceptible to pod borer while the total polyphenols as well as the activity of polyphenoloxidase wore significantly higher in pioonpea varieties resistant to podborer. The contents of nitrogen, protein, reducmq and total sugars, phosphorus, potassium and polyphenols decreased and the activity of polyphenoloxidase increased with an advancement An crop ago, from the data obtained in this study, it ran l>c summarised that the pigeonpea cultivars with a varying deqrsn of maturity and susceptibility to podborer differed significantly in respect of various biochemical constituents, espociaLly the nitrogen, phosphorus, potassium sugars and polyphenols as well as the? activity of polyphenoloxidase.
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