کاربرد قبل از برداشت کیتوسان و پوشش‌دهی با ژل آلوئه‌ورا بر پارامترهای بیوشیمیایی و عمر پس از ‏برداشت انگور عسگری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، دانشکده کشاورزی، دانشگاه لرستان، خرم‌آباد، ایران

2 دانشجوی دکتری، دانشکده کشاورزی، دانشگاه لرستان، خرم‌آباد، ایران

3 دانش‌آموخته کارشناسی ارشد، دانشکده کشاورزی، دانشگاه لرستان، خرم‌آباد، ایران

چکیده

استفاده از فیلم‌ها و پوشش‌های زیست تخریب‌پذیر و دارای ویژگی ضد میکروبی، به­عنوان یک جایگزین مناسب برای نگهدارنده‌های مصنوعی، با هدف حفظ امنیت غذایی و جلوگیری از هدر رفت سرمایه حائز اهمیت می‌باشد. به همین منظور، در این بررسی اثر محلول‌پاشی قبل از برداشت کیتوسان (در سه غلظت صفر، 2 و 3 درصد) و غوطه وری پس از برداشت با ژل آلوئه‌ورا (25 و 33 درصد) بر کیفیت و ماندگاری میوه انگور رقم عسگری در پنج زمان مختلف (صفر، 7، 14، 21 و 28 روز پس از برداشت) در دمای 4 درجه سانتی گراد مورد ارزیابی قرار گرفت. نتایج نشان داد که میوه‌های تیمار شده با کیتوسان و ژل آلوئه‌ورا دارای مقادیر بالاتر ویتامین ث، مواد جامد محلول، محتوای فلاونوئید کل، فعالیت آنزیم پراکسیداز و عمر ماندگاری و میزان کم‌تر مالون دی آلدئید نسبت به شاهد بودند، همچنین فعالیت آنزیم پلی فنول اکسیداز و درصد کاهش وزن در میوه‌های تیمار شده با کیتوسان و ژل آلوئه‌ورا کمتر بود. بالاترین میزان ویتامین ث، مواد جامد محلول و فعالیت آنزیم پراکسیداز در هر پنج زمان اندازه‌گیری مربوط به تیمارهای ترکیبی کیتوسان 2 درصد و ژل آلوئه 25 درصد بود و بیش‌ترین محتوای فلاونوئید و ماندگاری میوه در تیمار کیتوسان 3 درصد به همراه ژل آلوئه 25 درصد مشاهده شد. در هر پنج زمان اندازه‌گیری، مشاهده شد که تیمار کیتوسان 2 درصد به همراه ژل آلوئه 25 درصد دارای کم‌ترین میزان کاهش وزن، فعالیت آنزیم پلی فنول اکسیداز و مالون دی آلدئید بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Pre-harvest application of chitosan and Aloe vera gel coating on biochemical ‎parameters and post-harvest life of ‘Asgari’ grapes

نویسندگان [English]

  • Abdollah Ehtesham Nia 1
  • Shirin Taghipour 2
  • Sara Siahmansour 3
1 Associate Professor, Agriculture Faculty, Lorestan University, Khorramabad, ‎Khorramabad, Iran
2 Ph. D. Candidate, Agriculture Faculty, Lorestan University, Khorramabad, ‎Khorramabad, Iran
3 Graduate M. Sc. Student, Agriculture Faculty, Lorestan University, Khorramabad, Khorramabad, Iran
چکیده [English]

The use of biodegradable films and edible coatings with antimicrobial properties as a suitable alternative to synthetic preservatives is important in order to maintain food security and prevent capital wastage. In this respect, the effect of pre-harvest chitosan spraying (at three concentrations of 0, 2 and 3%) and post-harvest immerging in Aloe vera gel (25 and 33%) on the quality and shelf life of ‘Asgari’ grape fruit in five different times (0, 7, 14, 21 and 28 days after harvest) at 4 °C was evaluated. The results showed that berries treated with chitosan and Aloe vera gel contained higher content of vitamin C, soluble solids, Total flavonoids content, peroxidase activity and shelf life and lower content of malondealdehide (MDA) than the control, as well as, polyphenol oxidase enzyme activity and weight loss percentage were lower in fruits treated with chitosan and aloe vera gel.The highest amount of vitamin C, soluble solids and peroxidase activity in all five measurements belonged to the combined treatments of chitosan 2% and Aloe gel 25% and the highest flavonoid content and fruit shelf life was observed in the treatment of chitosan 3% with Aloe gel 25%. In all five measurements, it was observed that 2% chitosan treatment with 25% Aloe gel had the lowest weight loss, polyphenol oxidase activity and MDA.
 

کلیدواژه‌ها [English]

  • Edible coatings
  • enzymatic activity
  • total flavonoids content
  • fruit shelf life‎

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علوم باغبانی ایران
دوره 53، شماره 4
دی 1401
صفحه 905-916

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  • تاریخ دریافت: 21 فروردین 1401
  • تاریخ بازنگری: 12 اردیبهشت 1401
  • تاریخ پذیرش: 30 اردیبهشت 1401

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