Role of Post-harvest Treatment of Polyamines on Physico-physiological Qualities of Papaya (Carica papaya L.) Fruits Var. Red Lady during Ambient Storage

Polyamines are the natural compound, act as anti-senescent agents, reduce rate of respiration, delay ethylene production, retard colour change, maintain fruit firmness. Show that plays a pivotal role in postharvest life fruits and vegetables. The objective this study was to investigate effect post-harvest application polyamines different concentration on physico-physiological quality parameters papaya during ambient storage (33-36oC). Papaya treated with i.e., T2-0.50mM Spermine, T3- 1.0mM Spermine,T4- 1.5mM Spermine,T5- 0.50 mMSpermidine, T6- 1 mM Spermidine,T7- Spermidine,T8- 2 Putrescine,T9- 3 Putrescine,T10- 4 Putrescine T1-Control. Among treatments, (T10) recorded significantly minimum physiological loss weight, respiration colourvalues (L*, a*, b*) peel pulp, disease index maximum firmness, shelf compared control (T1). Hence it is confirmed from at 4mM found be effective delaying physico-chemical process cv. Red Lady.