۱۳۷۷۳پ
per
کاربرد پوششهای خوراکی کربوکسی متیل سلولز و پکتین روی برخی از ویژگیهای کیفی و بیوشیمیایی میوه آلو در طول دوره انبارمانی و عمر قفسهصای
/سیما پناهی راد
: کشاورزی
، ۱۳۹۴
چاپی
دکتری
علوم باغبانی- میوهکاری
۱۳۹۴/۰۶/۱۸
تبریز
Plum fruits are accepted as one of the most important stone fruits and Iran is amongst major production countries in the world. Most plum cultivars are climacteric; however, some are suppressed climacteric. Harvesting plums at maturity stage cause in fast ripening especially at room temperature and so in fast decay. Thus, enhancement of warehousing time and also fruit quality during the time is really essential for producers. Commonly, different methods are applied to reduce quality loss of plum fruits during postharvest periods. One of the methods, considering health concerns of customers, is application of edible coatings. Carboxymethylcellulose (CMC) and pectin (Pec) are two natural compounds based on polysaccharides that due to being odorless, tasteless and economical, their usage as edible coatings is going to achieve a great attention. The current research consisted of two separate experiment which one conducted at cold storage condition (storage at 4 C, 80-90 RH for six weeks) and another at shelf life condition (room with 19 C, 60-70 RH for eight days); each condition was performed with four concentrations of CMC (0, 0.5, 1 and 1.5 ) and four concentrations of Pec (0, 0.5, 1 and 1.5 ) as edible coatings on plum fruits cv. "Golden drop" in a factorial experiment and completely randomized design with three replications. The cold storage fruits at each sampling time (weekly) were assessed for TA, TSS, pH, firmness, weight loss, vit C, total phenolic compounds, total anthocyanin and flavonoids contents, total antioxidant capacity (based on DPPH method) and the activity of three enzymes including polyphenol-oxidase (PPO), peroxidase (POD) and polygalacturonase (PG). The shelf life fruits were assessed for same factors every other day. The obtained results from the current study demonstrated that both CMC and Pec-based edible coatings at both conditions significantly affected all measured parameters except weight loss. All the interactions between coating treatments and also coatings at time showed the same trend on measured parameters. In general, 1 CMC-based edible coating and 1.5 Pec-based edible coating at both maintenance conditions had the best results at the parameters. The results demonstrated that considering positive effects of CMC and Pec-based edible coatings on qualitative and biochemical properties of plum fruits, their application during postharvest period could be considered as a safe, easy to apply, economical and promising method for maintenance of plum fruits
پناهی راد، سیما
مهنا، ناصر، استاد راهنما
نقشی بندی حسنی، رحیم، استاد راهنما
قنبرزاده، بابک، استاد مشاور
زارع نهندی، فریبرز، استاد مشاور
سیاه و سفید
نمایهسازی قبلی
