نقش براسینواستروئید روی ویژگی‌های بیوشیمیایی و کیفی میوۀ پرتقال واشنگتن ‌ناول در دورۀ انبارداری

نوع مقاله: مقاله کامل

نویسندگان

1 دانشجوی کارشناسی ارشد، پژوهشکدۀ باغبانی، دانشگاه شهید باهنر کرمان، ایران

2 استادیار، پژوهشکدۀ باغبانی، دانشگاه شهید باهنر کرمان، ایران

چکیده

در این پژوهش به بررسی تأثیر براسینواستروئید بر ویژگی‌های بیوشیمیایی و کیفی میوۀ پرتقال ’واشنگتن ناول‘ در دورۀ انبارداری پرداخته شد. بدین منظور، میوه‌های پرتقال با غلظت‌های 0 (شاهد)، 75/0 و 5/1 میلی­گرم بر لیتر براسینواستروئید تیمار و در دمای 3±1 درجۀ سلسیوس و رطوبت نسبی 90-85 درصد به مدت پنج ماه نگهداری شدند و ویژگی­هایی مانند سرمازدگی، نشت یون، پراکسیداسیون ­لیپیدها، پراکسید هیدروژن، مواد جامد محلول، اسیدهای آلی، pH، اسید­آسکوربیک و فعالیت آنزیم­های پاداکسندگی (آنتی­اکسیدانی) پراکسیداز و کاتالاز در دورۀ انبار­داری ارزیابی شدند. نتایج نشان داد، کاربرد براسینواستروئید نسبت به شاهد، به‌طور معنی‌داری آسیب سرمازدگی، نشت یون، پراکسیداسیون لیپیدها و پراکسید ­هیدروژن را کاهش داد. بنا بر این نتایج، مواد جامد محلول کل، pH و اسید­آسکوربیک میوه­های تیمارشده و شاهد در دورۀ انبارداری روند افزایشی و میزان اسیدهای آلی روند کاهشی داشتند، اما استفاده از تیمار براسینواستروئید، تغییرپذیری دو روند یادشده را نسبت به شاهد کمتر تغییر داد. همچنین فعالیت آنزیم­های پاداکسندگی میوه­های تیمارشده با براسینواستروئید نسبت به شاهد، بسیار افزایش یافت. بنابر نتایج به‌دست‌آمده از این پژوهش، میوه‌های تیمارشده با 5/1 میلی­گرم بر لیتر براسینواستروئید، بالاترین کیفیت و بیشترین فعالیت آنزیم­های پاداکسندگی با کمترین آسیب سرمازدگی را داشتند.

کلیدواژه‌ها


عنوان مقاله [English]

Role of brassinosteroid on biochemical and qualitative characteristics of ‘Washington Navel’ orange fruit during storage

نویسندگان [English]

  • Bahareh Ghorbani 1
  • Zahra Pakkish 2
  • Masoud Khezri 2
1 M. Sc. Student, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
2 Assistant Professor, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
چکیده [English]

Orange fruits were treated with 0 (control), 0.75 and 1.5 mgL-1 brassinosteroid for 5 Min and then stored at 3±1°C and 85-90 % relative humidity for 5 month. Characteristics of chilling injury, ion leakage, lipid peroxidation, hydrogen peroxide, total soluble solids, titratable acidity, pH, ascorbic acid, and activity of antioxidant enzymes (peroxidase and catalase) have been evaluated. Results showed that fruits treated with brassinosteroid significantly reduced the chilling injury, ion leakage, lipid peroxidation and hydrogen peroxide, compared to control. According this results, total soluble solids, pH, and ascorbic acid, of treated and control fruits increased during storage while titratable acidity of fruits decreased. The pattern of mentioned changes reduced in brassinosteroid treatments lower than to control. The activity of antioxidant enzymes of fruits treated with brassinosteroid highly increased compared to control during storage. Fruits treated with 1.5 mgL-1 brassinosteroid showed highest quality and activity of antioxidant enzymes, with lowest chilling injury.

کلیدواژه‌ها [English]

  • antioxidant enzyme
  • brassinosteroid
  • orange
  • qualitative characteristics storage
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