Showing 3 results for Shamili
Volume 12, Issue 47 (7-2015)
Abstract
Mango is a tropical crop that has been originated from south east areas of Asia. Mango has high decayed nature because it climacteric property. In order to investigate the effect of Putrescine and cold water treatments on post-harvest quality of mango, an experiment was done as factorial design in 2012. So local mango fruit was prepared at maturity stage, were treated with treatment combinations of Putrescine solution (0, 0.01, 0.1 mM) and cold distilled water (non-soaking and soaking for 30 and or 60 minutes). Quantitative and qualitative traits of fruit (like fresh and dry weight, length and width, firmness, total soluble solid, acidity, pH, taste and aroma, skin and pulp color) and also observation of rot symptoms have been measured. Results showed Putrescine and cold water treatments were affected fruit taste, acidity, and TSS/acidity ratio, also rot symptoms were reduced. Both concentrations of Putrescine affected the firmness and total soluble solids significantly. In all treatments combination of cold water and Putrescine fresh and dry weight was higher than control. The results indicated a positive and significant impact of mixed fruit dipping treatments in cold water and Putrescine in keeping appearance quality and improving storage life of mango fruit. Therefore the greatest concentration of Putrescine (0.1 mM) with immersion in cold water is recommended.
Volume 17, Issue 109 (March 2021)
Abstract
Green mold rot disease caused by Penicillium digitatum is the most economically important postharvest disease of lime fruit in all production areas. In this research, effects of essential oils (Cinnamomun verum, Eugenia caryophyllata, Thymus vulgaris, Zataria multiflora) for controlling green mold in Mexican lime (Citrus aurantifolia cv. Mexican lime) fruit were studied. Mexican limes were inoculated by Penicillium digitatum suspension and were immersed with the essential oils at three levels 0 (as control), 0.1 and 0.2% (v/v). Then, fruits were kept at 8±1oC and 90-95% relative humidity for 21 days. The results showed that the essential oils significantly affected fruit decay, weight loss, L*, a*, b*, total phenolic content and total antioxidant activity. After 21 days of storage, total phenolic content and total antioxidant activity of treated fruit with essential oils were higher compared with the control. In addition, essential oils were effective in decay and water loss control, and decreasing L* and b* compared with the control. The garden thyme essential oil at 0.2% decreased postharvest decay seven times lower than control but increased total phenolic compounds and antioxidant activity compared to the control 21 days after storage. Therefore, garden thyme essential oil has a strong effect on controlling green mold and maintaining quality of Mexican lime fruit.
Volume 19, Issue 123 (May 2022)
Abstract
Abstract
The use of natural ingredients such as edible coatings is considered as an environmental friendly way to control post-harvest fruit rot as well as delay fruit senescence. The aim of this study was to investigate the effects of edible coatings for controlling fruit rot caused by Penicillium digitatum and some qualitative characteristics of Mexican lime during storage. Mexican limes were inoculated with fungi suspension and were immersed in carboxymethyl cellulose (CMC), hydroxylpropyl methylcellulose (HPMC) and sodium alginate (ALG) coatings at four concentrations of 0 (control), 0.5, 1 and 1.5%. Then, Mexican lime fruit were stored at temperature of 8 ° C and relative humidity of 90-95% for 21 days. The results showed that edible coatings showed significant effects on fruit rot, weight loss, percentage of soluble solids, titratable acid, L *, a *, phenolic content and total antioxidant activity. Among the edible coatings, CMC at 1.5% reduced the fruit rot caused by green mold (77%) and reduced the weight loss (80%), TSS (5%) and increased the titratable acidity (33%) and total antioxidant activity (10%) compared to the control after 21 days of storage. Therefore, the use of edible coatings, especially 1.5% CMC, can maintain qualitative characteristics of Mexican lime and reduce the rot. Therefore, it can be used as an environmental friendly method to maintain fruit quality and reduce post-harvest waste.