Effect of putrescine application on fruit quality of florida prince and early grande peaches during cold storage

الملخص EN

Peach(Prunus persica, L.) Florida Prince and Early Grande peach cvs.

Postharvest treatments were conducted during two successive seasons of 2015 and 2016 to study the effect of dipping the two cvs.

fruits in putrescine solution on fruit storability .

Fruits of the two cvs.

used in this study were harvested from trees about 12 years old, budded on Nemaguard rootstock and planted in a private orchard at 4x4 meter apart in sandy soil located in El-Nobaria region, El-Behira governorate.

Peach fruits of the two cultivars were harvested at the commercial maturity stage and immerged in putrescine solutions at 2, 3 and 4 mM for 5 mint.

as well as distilled water(control).

Postharvest storage quality of peach fruit cvs.

were evaluated during storage at 0-1C° and 90-95 RH.

for 28 days.

Fruit quality parameters such as weight loss (%), decay (%), chilling injury (%), soluble solid content(SSC%), titratable acidity(%), fruit firmness(k/cm2), respiration rate and total sugars(%) were determined at harvest time and during the storage period every 7 days intervals .

The results showed that, putrescine solution treatments extend postharvest storability of treated fruits of the both cvs.

by inducing fruit resistance to decay and chilling injury compared to those of control .

Moreover, putrescine solutions reduced fruit weight loss, chilling injury, soluble solids content, respiration rate and total sugars and maintained fruit firmness and acidity during storage for the two peach cvs.

in the two study seasons .

In this respect, 4 mM putrescine treatment was more effective than the other concentrations and control with the two cultivars .

Thus quality and storability of peach fruits could be enhanced with putrescine treatments for its ability on delaying the ripening processes and extending postharvest fruit life.