Asrey Ram, Kumar Kuldeep, Sharma R R, Meena Nirmal Kumar
Division of Food Science and Post Harvest Technology, Indian Agricultural Research Institute, New Delhi, 110 012 India.
J Food Sci Technol. 2020 Apr;57(4):1469-1476. doi: 10.1007/s13197-019-04182-x. Epub 2019 Nov 22.
Present study aimed to investigate the effect of preharvest bagging and bag colour on physico-chemical, nutraceutical quality and consumer acceptability of pomegranate arils. Fruits of 10-years-old Kandhari variety were covered with 15 × 20 cm three colored single layer cellulosic bags (35 µm thickness, 2700 cm 24 h GTR, WVTR 28.60 cm 24 h) 60 days after flowering. Fruits were harvested 150 days after anthesis (average TSS 13° brix) and fruits were taken to various physical-biochemical parameters. Red colored bagging minimized fruit cracking (66%) and bacterial blight incidence (78%) over control. Ascorbic acid and total anthocyanin content was found maximum with red colour bagged (18.20 ± 0.87 mg 100 g FW; 73.03 ± 3.97 mg 100 g FW) fruits, while total soluble solids, total sugars and total antioxidant capacity were maximum in control fruits. Total phenols were found maximum in fruits which were bagged with blue colour bags (32.12 ± 1.53 mg GAE 100 g FW). Respiration rate was recorded maximum in the red colored bags (17.93 ± 0.22 mL kg h) followed by white, blue and control fruits. Overall acceptability was recorded maximum in the fruits which were covered with red colour bags (8.67) whereas sweetness was reported maximum in control fruits (8.30). For harnessing the benefit of bagging in pomegranate, fruit should be bagged 60 days after flowering with red color cellulosic bags. Red color cellulosic bags are much effective in producing quality fruits except compromising on few quality traits like aril Ca and total phenols content.
本研究旨在探讨采前套袋及袋颜色对石榴籽理化性质、营养品质和消费者接受度的影响。对10年生坎德哈里品种的果实,在开花60天后用15×20厘米的三层彩色单层纤维素袋(厚度35微米,24小时气体透过率2700平方厘米,24小时水蒸气透过率28.60平方厘米)进行套袋。在开花后150天(平均可溶性固形物含量13°波美度)采收果实,并对果实进行各种物理生化参数测定。与对照相比,红色套袋使果实裂果率降至最低(66%),细菌性疫病发病率降至最低(78%)。红色套袋果实的抗坏血酸和总花青素含量最高(分别为18.20±0.87毫克/100克鲜重;73.03±3.97毫克/100克鲜重),而对照果实的总可溶性固形物、总糖和总抗氧化能力最高。蓝色套袋果实的总酚含量最高(32.12±1.53毫克没食子酸当量/100克鲜重)。红色套袋果实的呼吸速率最高(17.93±0.22毫升/千克·小时),其次是白色、蓝色套袋果实和对照果实。红色套袋果实的总体接受度最高(8.67),而对照果实的甜度最高(8.30)。为了利用石榴套袋的益处,应在开花60天后用红色纤维素袋对果实进行套袋。除了在石榴籽钙含量和总酚含量等少数品质性状上有所妥协外,红色纤维素袋在生产优质果实方面非常有效。