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تأثیر تیمار تریپتوفان بر حفظ بازارپسندی و افزایش عمر انبارمانی میوه گیلاس | ||
| پژوهش های صنایع غذایی | ||
| دوره 36، شماره 1، خرداد 1405، صفحه 15-32 اصل مقاله (994.69 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/fr.2026.70769.1984 | ||
| نویسندگان | ||
| نرمین کریمیان* 1؛ فرهنگ رضوی2؛ مرتضی سلیمانی اقدم3 | ||
| 1دانشجوی دکتری علوم و مهندسی باغبانی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران | ||
| 2استاد، گروه علوم و مهندسی باغبانی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران | ||
| 3دانشیار، گروه علوم باغبانی، دانشکده کشاورزی و منابع طبیعی، دانشگاه بینالمللی امام خمینی قزوین، قزوین، ایران | ||
| چکیده | ||
| تریپتوفان بهعنوان یک اسیدآمینه آروماتیک و پیشساز ترکیبات زیستفعال، میتواند در تنظیم پاسخهای دفاعی و تأخیر در فرآیند پیری نقش مؤثری ایفا کند. میوه گیلاس (Prunus avium L.) در دوره پس از برداشت، بهعلت داشتن پوست نازک، سرعت تنفس زیاد و فعال شدن مسیرهای اکسیداتیو، فسادپذیری بالایی دارد. بنابراین، استفاده از تریپتوفان میتواند رویکردی مناسب برای بهبود ماندگاری آن بهشمار آید. این پژوهش با هدف ارزیابی تأثیر تیمار پس از برداشت تریپتوفان بر ویژگیهای بیوشیمیایی و آنتیاکسیدانی در میوه گیلاس رقم «تکدانه» در شرایط انبار سرد انجام شد. آزمایش به صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار اجرا گردید. فاکتور اول شامل غلظتهای مختلف تریپتوفان (صفر، 5/0، 1 و 2 میلیمولار) و فاکتور دوم مدت زمان انبارمانی (7، 14، 21 و 28 روز) بود. میوهها پس از غوطهوری در تیمار، در دمای 5/0±1 درجه سانتیگراد و رطوبت نسبی 85 تا 90 درصد نگهداری شدند. نتایج نشان داد، که کاربرد تریپتوفان، بهویژه در غلظت 2 میلیمولار، بهطور معنیداری موجب افزایش پرولین، پروتئین محلول کل، فعالیت آنزیم پراکسیداز، ظرفیت جاروب کنندگی رادیکال DPPH و آنتوسیانین کل شد. این تغییرات با حفظ اسیدیته و اسید کل، کنترل افزایش مواد جامد محلول و کربوهیدرات محلول کل، بهبود شاخص طعم و نیز کاهش شدت قهوهای شدن دم میوه در طی دوره انبارمانی همراه بود. بهطور کلی، یافتهها نشان داد، که تریپتوفان میتواند با تقویت سیستم آنتیاکسیدانی و کاهش آسیب اکسیداتیو، بهعنوان یک ماده زیستفعال و طبیعی برای حفظ کیفیت و افزایش ماندگاری پس از برداشت میوه گیلاس در شرایط انبار سرد مورد استفاده قرار گیرد. | ||
| کلیدواژهها | ||
| پراکسیداز؛ پرولین؛ ترکیبات زیستفعال؛ سیستم رنگسنجی CIELAB؛ کیفیت پس از برداشت | ||
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