بررسی و مقایسه پوشش کیتوسان و آلوئه ورا بر عمر پس از برداشت، کیفیت و ترکیبات زیست¬فعال توتفرنگی رقم کاماروسا ( Strawberry camarosa)
محورهای موضوعی : نانوذراتپویا جلالی 1 , عبدالرسول ذاکرین 2 * , عبدالحسین ابوطالبی جهرمی 3 , حمید صادقی 4
1 - گروه علوم باغبانی، واحد جهرم، دانشگاه آزاد اسلامی، جهرم، ایران
2 - گروه علوم باغبانی، واحد جهرم، دانشگاه آزاد اسلامی، جهرم، ایران
3 - گروه علوم باغبانی، واحد جهرم، دانشگاه آزاد اسلامی، جهرم، ایران
4 - گروه زیست شناسی، واحد جهرم، دانشگاه آزاد اسلامی، جهرم، ایران
کلید واژه: فنول کل, ظرفیت آنتیاکسیدانی, مواد جامد محلول, اسید قابل تیتر, شاخص طعم, درصد پوسیدگی&rlm, ,
چکیده مقاله :
توتفرنگی از جمله میوههای فسادپذیر است و از این رو در دهههای اخیر تلاش فراوانی در راستای افزایش ماندگاری توتفرنگی و حفظ ارزش تغذیهای آن در شرایط پس از برداشت با روشهایی غیر از کاربرد قارچکشها صورت گرفته است. با توجه به اهمیت موضوع، در پژوهش حاضر اثرات کاربرد هفت تیمار پوشش شامل سه تیمار کیتوسان (محلول 50/0، 75/0 و 1درصد)، سه تیمار ژل آلوئهورا (محلول 25/0، 50/0 و 75/0 درصد) به همراه شاهد بر عمر انباری و کیفیت محصول توتفرنگی در شرایط انبار (دمای 4 درجه سانتیگراد با رطوبت 90 درصد) مورد بررسی قرار گرفت. در روزهای 3، 6 و 12 انبارمانی، شاخصهای کیفی و عمر پس از برداشت میوهها ارزیابی شد. کاربرد پوششهای خوراکی میزان اتلاف وزن، پوسیدگی میوه، محتوای مواد جامد محلول، pH آب میوه و شاخص طعم را در طول دورۀ انبارمانی نسبت به شاهد کاهش داد. در مقابل موجب افزایش محتوای اسیدهای قابل تیتر، ویتامین ث، سفتی بافت، ترکیبات فنولی و ظرفیت آنتیاکسیدانی نسبت به شاهد گشت. در بین تیمارهای مورد استفاده، کاربرد کیتوسان 1 درصد و آلوئهورا 75/0 درصد بیشترین کارایی را در افزایش عمر انباری و کیفیت میوۀ توتفرنگی داشتند. نتایج این پژوهش استفاده از این مواد را به عنوان پوششهای خوراکی و بیخطر برای مصرف کننده توصیه می کند.
Strawberry is one of the perishable fruits, and therefore, in recent decades, many efforts have been made to increase the shelf life of strawberries and its nutritional value in post-harvest conditions with methods other than fungicides. Considering the importance of the subject, in the present study, the effects of seven tratmnets of chitosan coating (0.5, 0.75 and 1 % solutions), Aloe vera gel (0.25, 0.50 and 0.75% solutions) alonge with control on shelf life and the quality of the strawberry product was investigated in warehouse conditions (4 °C and 90% relative humidity). On the 3rd, 6th, and 12th days of storage, the quality and life indicators of the fruits were evaluated after harvesting. The use of edible coatings reduced the rate of weight loss, fruit decay, soluble solids content, fruit juice pH and taste index during the storage period compared to the control. In contrast, the content of titratable acids, vitamin C, tissue stiffness, phenolic compounds and antioxidant capacity increased compared to the control. Among the treatments used, the use of chitosan 1% and Aloe vera 0.75% were the most effective in increasing the storage life and quality of strawberry fruit. The results of this study recommended the application of these coatings as edible and safe coatings for the consumer.
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