تاثیر کاربرد قبل از برداشت اسپرمیدین بر برخی ویژگی های کیفی میوه در دو رقم هلو

هلو (prunus persica l.) از خانواده گلسرخیان (rosaceae) و از مهم‌ترین میوه‌های مناطق معتدله محسوب می‌شود. کیفیت میوه از عوامل مهم در گسترش و بازاریابی این محصول به شمار می‌رود. کاربرد برخی مواد شیمیایی و هورمونی نقش بسزایی در افزایش ماندگاری و کیفیت میوه‌ها دارند. آزمایشی به منظور ارزیابی امکان افزایش کیفیت میوه در دو رقم هلو «انجیری‌خونی» و «گجیرگانات» با استفاده از تیمارهای مختلف اسپرمیدین (0، 1 ، 3 و 5 میلی‌مولار) در قالب طرح بلوک‌های کامل تصادفی در چهار تکرار انجام شد. محلول‌پاشی اسپرمیدین 10 روز پیش از رسیدن تجاری (براساس شاخص مواد جامد محلول کل) بر روی درختان ده ساله هلو انجام و پس از برداشت، میوه‌ها به آزمایشگاه بیولوژی گلدهی و فیزیولوژی رشد و نمو میوه دانشکده کشاورزی دانشگاه تبریز منتقل و پارامترهای کیفی نظیر سفتی بافت میوه، مواد جامد محلول کل (tss)، اسید قابل تیتراسیون (ta)، ph آب میوه، ویتامین ث، فنل کل، فلاونوئید کل و ظرفیت آنتی‌اکسیدان کل ارزیابی شدند. نتایج نشان داد اسپرمیدین اثرات معنی‌دار در سطخ 5% و 1% بر صفات کیفی میوه هلو دارد. در هر دو رقم سفتی میوه، اسید قابل تیتراسیون، فنل و فلاونوئید کل، ویتامین ث و آنتی‌اکسیدان کل میوه افزایش و ph میوه تا حدودی کاهش یافت. بیشترین سفتی بافت میوه، فلاونوئید، tss و اسید قابل تیتر در رقم «گجیر‌گانات» و بیشترین مقدار فنل کل، آنتی‌اکسیدان و ویتامین c در میوه‌های رقم «انجیری‌خونی» مشاهده شدند. بیشترین مقدار در اسپرمیدین پنج میلی-مولار و کمترین مقدار آنها در میوه‌های شاهد ثبت گردید. در هر دو رقم بیشترین مقدار سفتی بافت میوه، اسیدیته قابل تیتراسیون و فلاونوئیدکل مربوط به تیمار 3 و 5 میلی‌مولار اسپرمیدین بود.

effect of pre-harvest application of spermidine on maintaining quality and improving storage life in two peach cultivars

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.