تاثیر کاربرد قبل از برداشت اسپرمیدین روی حفظ کیفیت و بهبود عمر انبارمانی در دو رقم هلو

Peach (Prunus persica L.) is from the Rosaceae family and one of the most important fruit trees. Fruit quality is one of the important factors in the development and marketing of this product. Application of some chemicals and hormones have a great role in increasing the shelf life and quality of fruits. In this researc the effects of pre-harvest treatments of Spermidine on some fruit quality characteristics in two peach cultivars, an experiment to evaluate the possibility of increasing fruit quality in two peach cultivars (Anjiri e Khooni and Gajir Ganat) using different spermidine treatments (0, 1, 3 and 5 mM) in a randomized complete block design (RCD) with four replications. Spermidine foliar application was performed on peach trees 10 days before commercial arrival (based on total solubility solids index). After harvest, the fruits were transferred to the Flowering Biology and Fruit Laboratory of Tabriz University of agriculture and quality parameters such as fruit firmness, total soluble solids (TSS), titrable acid (TA), fruit juice pH, vitamin C , Total phenol compositions, total flavonoid and total antioxidant capacity (DPPH) were evaluated. The results showed that pre-harvest application of spermidine had significant effects at 5% and 1% levels on the quality traits of peach fruit. In both varieties, fruit firmness, titrable acid, total phenolic, flavonoid, vitamin C and total antioxidant of fruit increased and fruit pH decreased slightly. The highest firmness of fruit, flavonoid, TSS and titratable acid were observed in “Gajirganat” cultivar and the highest total phenol, antioxidant and vitamin C were found in “Anjiri e Khooni” fruits. The highest values were observed in 5 mM spermidine and the lowest in control fruits. In both cultivars, the highest amount of fruit firmness, titratable acidity and flavonoids were observed in 3 and 5 mM spermidine.Peach (Prunus persica L.) is from the Rosaceae family and one of the most important fruit trees. Fruit quality is one of the important factors in the development and marketing of this product. Application of some chemicals and hormones have a great role in increasing the shelf life and quality of fruits. In this researc the effects of pre-harvest treatments of Spermidine on some fruit quality characteristics in two peach cultivars, an experiment to evaluate the possibility of increasing fruit quality in two peach cultivars (Anjiri e Khooni and Gajir Ganat) using different spermidine treatments (0, 1, 3 and 5 mM) in a randomized complete block design (RCD) with four replications. Spermidine foliar application was performed on peach trees 10 days before commercial arrival (based on total solubility solids index). After harvest, the fruits were transferred to the Flowering Biology and Fruit Laboratory of Tabriz University of agriculture and quality parameters such as fruit firmness, total soluble solids (TSS), titrable acid (TA), fruit juice pH, vitamin C , Total phenol compositions, total flavonoid and total antioxidant capacity (DPPH) were evaluated. The results showed that pre-harvest application of spermidine had significant effects at 5% and 1% levels on the quality traits of peach fruit. In both varieties, fruit firmness, titrable acid, total phenolic, flavonoid, vitamin C and total antioxidant of fruit increased and fruit pH decreased slightly. The highest firmness of fruit, flavonoid, TSS and titratable acid were observed in “Gajirganat” cultivar and the highest total phenol, antioxidant and vitamin C were found in “Anjiri e Khooni” fruits. The highest values were observed in 5 mM spermidine and the lowest in control fruits. In both cultivars, the highest amount of fruit firmness, titratable acidity and flavonoids were observed in 3 and 5 mM spermidine.Peach (Prunus persica L.) is from the Rosaceae family and one of the most important fruit trees. Fruit quality is one of the important factors in the development and marketing of this product. Application of some chemicals and hormones have a great role in increasing the shelf life and quality of fruits. In this researc the effects of pre-harvest treatments of Spermidine on some fruit quality characteristics in two peach cultivars, an experiment to evaluate the possibility of increasing fruit quality in two peach cultivars (Anjiri e Khooni and Gajir Ganat) using different spermidine treatments (0, 1, 3 and 5 mM) in a randomized complete block design (RCD) with four replications. Spermidine foliar application was performed on peach trees 10 days before commercial arrival (based on total solubility solids index). After harvest, the fruits were transferred to the Flowering Biology and Fruit Laboratory of Tabriz University of agriculture and quality parameters such as fruit firmness, total soluble solids (TSS), titrable acid (TA), fruit juice pH, vitamin C , Total phenol compositions, total flavonoid and total antioxidant capacity (DPPH) were evaluated. The results showed that pre-harvest application of spermidine had significant effects at 5% and 1% levels on the quality traits of peach fruit. In both varieties, fruit firmness, titrable acid, total phenolic, flavonoid, vitamin C and total antioxidant of fruit increased and fruit pH decreased slightly. The highest firmness of fruit, flavonoid, TSS and titratable acid were observed in “Gajirganat” cultivar and the highest total phenol, antioxidant and vitamin C were found in “Anjiri e Khooni” fruits. The highest values were observed in 5 mM spermidine and the lowest in control fruits. In both cultivars, the highest amount of fruit firmness, titratable acidity and flavonoids were observed in 3 and 5 mM spermidine.