اثرات روکش لایه جمع‌شونده، پوشش واکس و روکش پوشال کاغذ بر ویژگی‌های کیفی انارهای‌ ‏(‏Punica granatum L.‎‏) رقم ’اشکفتو‘ و ’رباب‘ در طول انبارمانی سرد

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار، دانشکده کشاورزی و منابع طبیعی داراب، دانشگاه شیراز، داراب، ایران

10.22059/ijhs.2021.322813.1924

چکیده

این پژوهش برای ارزیابی اثرات شش تیمار پس از برداشت شامل 1- روکش لایه جمع‌شونده، 2- پوشش واکس، 3- روکش پوشال کاغذ، 4- پوشش واکس+ روکش لایه، 5- پوشش واکس+ روکش پوشال کاغذ، 6- بدون پوشش، بر ویژگی‌های کیفی فیزیکی-شیمیایی رقم‌های ’رباب‘ و ’اشکفتو‘ انار انجام شد. میوه‌های تیمار شده در دمای 5/3 درجه سانتی‌گراد و رطوبت نسبی حدود 85 درصد برای مدت حداکثر 12 هفته نگه‌داری شدند. میانگین کاهش وزن انارهای رقم ’اشکفتو‘ و ’رباب‘ در مقایسه با شاهد 61/۹ درصد به‌ترتیب در میوه‌های روکش لایه جمع‌شونده 19/1 درصد، پوشش واکس+ روکش پوشال کاغذ 94/1 درصد، پوشش واکس 67/۳ درصد و روکش پوشال کاغذ 27/۴ درصد کمتر بود. راندمان کم کردن کاهش وزن پوشش واکس+ روکش لایه )01/۱ درصد( برتر از روکش لایه به تنهایی )19/۱ درصد( نبود. محتوای فنلی کل و فعالیت آنتی‌اکسیدانی میوه‌های رقم҆ اشکفتو҅ در تیمارهای روکش لایه و همچنین پوشش واکس+ روکش لایه به‌طور معنی‌دار بیشتر از شاهد بود، اما در رقم ’رباب‘ فقط آنتوسیانین کل میوه این تیمارها با شاهد تفاوت معنی‌دار نشان داد. روکش لایه+ پوشش واکس نیز در کاهش نشت الکترولیت پوست میوه‌ها خیلی موثر بود و ممکن است مقاومت به دمای سرد را در انارها افزایش داده باشد. رقم҆ اشکفتو҅ دارای بیشترین میزان محتوای فنلی کل، آنتوسیانین کل، اسید قابل تیتر، اتانول، مواد جامد محلول کلو فعالیت آنتی‌اکسیدانی بود.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of shrink film wrapping, wax coating and paper packaging on the quality ‎attributes of pomegranates (Punica granatum L.) cvs. ‘Eshkafto’ and ‘Rabbab’ ‎during cold storage

نویسنده [English]

  • Mohammad Reza Safizadeh
Assistant Professor, College of Agriculture and Natural Resources of Darab, Shiraz University, Darab, Iran
چکیده [English]

This study investigated the effects of six postharvest treatments including: 1) wrapping with shrink film, 2) wax coating, 3) paper packing, 4) wax coating plus film-wrapping, 5) wax coating plus paper packing, 6) uncovered, on the physicochemical quality attributes of pomegranate, cvs. ‘Eshkafto’ and ‘Rabbab’. Treated fruits stored at 3.5 °C and about 85 % relative humidity for up to 12 weeks. Mean weight loss of pomegranate cvs. ‘Eshkafto’ and ‘Rabbab’ was lower in film-wrapped (1.19%), wax coated plus paper packed (1.94%), wax coated (3.67%) and paper-packed fruits (4.27%) compared with uncovered fruits (9.61%), respectively. However, the efficiency of wax coating plus film-wrapping in reducing weight loss (1.01%) was not superior to film-wrapping alone (1.19%). Total phenolic content and antioxidant activity of film-wrapped and also wax coated plus film-wrapped fruits of cv. ‘Eshkafto’ significantly were higher than that, control fruit, but with cv. ‘Rabbab’ only total anthocyanin of these treatments were higher than control fruit. Film wrapping plus wax coating also was highly effective in reducing electrolyte leakage in the husk of fruits and might be enhanced low temperature tolerance in pomegranates. Cultivar ‘Eshkafto’ had the highest contents of total phenolic, total anthocyanin, total soluble solids, titratable acid, ethanol and antioxidant activity.

کلیدواژه‌ها [English]

  • Anthocyanin
  • Antioxidant
  • Bioactive compounds
  • phenolic compounds
  • packaging
  • postharvest‎
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