تأثیر تیمار متیل جاسمونات بر فعالیت آنتی‌اکسیدانی میوه انار رقم ملس ساوه طی دوره انبارداری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، پردیس‎ ‎کشاورزی‎ ‎و‎ ‎منابع‎ ‎طبیعی‎ ‎دانشگاه‎ ‎تهران،‎ ‎کرج،‎ ‎ایران

2 استاد، پردیس‎ ‎کشاورزی‎ ‎و‎ ‎منابع‎ ‎طبیعی‎ ‎دانشگاه‎ ‎تهران،‎ ‎کرج،‎ ‎ایران

3 دانش‌آموخته دکتری، پردیس‎ ‎کشاورزی‎ ‎و‎ ‎منابع‎ ‎طبیعی‎ ‎دانشگاه‎ ‎تهران،‎ ‎کرج،‎ ‎ایران

چکیده

در این پژوهش اثر غلظت‌های مختلف متیل جاسمونات به‌صورت ترکیب قبل و پس از برداشت بر میزان فعالیت آنتی‌اکسیدان‌های پوست و آریل میوه انار رقم ملس ساوه در طی شرایط انبارداری 5‏‏/0±4 درجه سانتی‌گراد و رطوبت نسبی 95-90 درصد به‌مدت 120 روز و در دو سال متوالی مورد ارزیابی قرار گرفت. تیمار 2/0 میلی‌مولار متیل جاسمونات از طریق افزایش فعالیت آنزیم‌های آنتی‌اکسیدان آسکوربات پراکسیداز (34 درصد)، کاتالاز (41 درصد) و سوپراکسید دیسموتاز (26 درصد) سبب کاهش در میزان هیدروژن پراکسید (36 درصد) قسمت آریل و پوست میوه‌های انار شد که در نهایت منجر به افزایش سیالیت غشای سیتوپلاسمی گردید. همچنین قسمت‌های آریل و پوست میوه‌های انار تیمار شده با متیل جاسمونات 2‏‏/0 میلی‌مولار به‌طور معنی‌داری میزان فعالیت آنزیم پلی‌فنل اکسیداز کمتری (47 درصد) نسبت به میوه‌های شاهد نشان دادند. به‌طورکلی کاربرد متیل‌جاسمونات را می‌توان به‌عنوان یک روش سودمند جهت حفظ کیفیت تغذیه‌ای میوه‌های انار از طریق افزایش میزان فعالیت سیستم آنتی‌اکسیدانی، تلقی کرد.

کلیدواژه‌ها


عنوان مقاله [English]

Impact of methyl jasmonate treatment on antioxidant system of pomegranate fruit ‎cv "Malase" Saveh during storage

نویسندگان [English]

  • Mohammad Ali Askari Sarcheshmeh 1
  • Mesbah Babalar 2
  • Farhad Pirzad 3
  • Alireza Talaie 2
  • Hossein Lesani 2
1 Associate Professor, College of Agriculture and Natural Resources, University of ‎Tehran, Karaj, Iran
2 Professor, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
3 Former Ph.D. Student, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

In this study, the impacts of methyl jasmonate treatment applied by preharvest spray in combination with postharvest immersion on husk and aril antioxidant system of pomegranate fruit during storage at 4±0.5 °C and relative humidity of 90-95 percent, for 120 days during two years was investigated. Methyl jasmonate treatment at 0.2 mM displayed lower husk and aril H2O2 accumulation (36%) due to higher antioxidant enzymes ascorbate peroxidase (34%), catalase (41%) and superoxide dismutase activity (26%), that evetually caused to higher membrane integrity in pomegranate fruit husk. Also, pomegranate fruit treated with methyl jasmonate at 0.2 mM displayed significantly lower husk and aril polyphenol oxidase enzymes activity (47%) than control fruits. Overall, methyl jasmonate treatment can be used as promising technology for maintaining nutraceutical properties of pomegranate fruit partially by promoting antioxidant system activity.

کلیدواژه‌ها [English]

  • Ascorbate peroxidase
  • Catalase
  • pomegranate
  • storage
  • superoxide dismutase
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