EFFECT OF MODIFIED ATMOSPHERE PACKAGING ON THE POSTHARVEST LIFE AND QUALITY OF MANGO CV.

SAMAR BAHISHT CHAUNSA STORED AT CHILLING TEMPERATURE.

氣調包裝對芒果采后壽命和品質的影響.SAMAR BAHISHT CHAUNSA STORED在低溫條件下存儲

Ali, Zohaib¹，Malik, Aman Ullah¹，Khan, Ahmad Sattar¹，Amin, Muhammad¹，Rehman, Abdul²

¹Postharvest Lab., Institute of Horticultural Sciences, University of Agriculture, Faisalabad, Pakistan;

²Department of Plant Pathology, University of Agriculture, Faisalabad, Pakistan.

Abstract

Modified Atmosphere Packaging (MAP) increases the postharvest life of fresh fruits by suppressing metabolic activities with modified in-package atmosphere. This study was aimed to explore the potential benefits of MAP technology combined with low temperature storage in mango cv. 'Samar Bahisht Chaunsa' to extend its shelf life. Physiologically mature mangoes after harvest were de-sapped (0.5% lime solution), dipped in hot water (52±2°C for 5 min) fungicidal (0.5 mL Prochloraz L-1) solution, packed in 5kg cardboard boxes (T1; Biofresh®, T2; Xtend®, T3; Unbagged) and stored at 13°C±1, RH: 85-90% for 7, 14, 21, 28 and 35 days. Following cold storage, fruit were subjected to two different ripening temperatures (32 and 24°C) with a 24 h 100 ppm ethylene treatment. Data related to physical, physiological, biochemical, organoleptic and marketable attributes was collected. Among MAP bags, the desirable atmosphere comprising high CO2 and low O2 concentration was observed in Biofresh® bags. Tolerance of mangoes under elevated CO2 atmospheres and chilling injury (CI) decreased when storage period exceeded more than 14 days with onset of discolouration issues. Overall, bagged fruit had minimum weight loss, CI intensity, shriveling and remained firmer in comparison to control. Maximum peel colour development was observed in fruit stored up to 14 days in Biofresh® bags when ripened at high temperature (32±1°C). Whereas, fruit kept in Xtend® bags and those without MAP only developed acceptable peel colour up to 7 days of cold storage. Fruit kept in Xtend® bags exhibited minimum ethylene levels (ppm) and endured the least loss in weight and firmness but remained mostly green. Bagged fruit had a higher vitamin C content and lower TA in comparison to unbagged fruits. In conclusion, 'Samar Bahisht Chaunsa' stored at 13°C in Biofresh® bag showed better visual appearance, palatability and nutritive values as compared to Xtend® bag and those without MAP

氣調包裝(MAP)通過抑制包裝氣中的代謝活性，提高了新鮮水果的采后壽命。本研究旨在探討MAP技術與芒果低溫貯藏相結合的潛在效益為了延長保質期。收獲后生理成熟的芒果脫去果皮(0.5%石灰溶液)，浸入熱水(52±2°C，5分鐘)殺菌劑(0.5毫升咪鮮胺L-1)溶液中，裝入5公斤紙箱(T1；Biofresh®T2；Xtend®T3；未包裝)中，在13°C±1，相對濕度：85-90%下儲存7、14、21、28和35天。冷藏后，果實在兩種不同的成熟溫度(32和24°C)下，用100 ppm乙烯處理24小時。收集有關物理、生理、生化、感官和市場屬性的數據。在MAP袋中，在Biofresh®袋中觀察到理想的大氣，包括高CO2和低O2濃度。當貯藏期超過14天時，芒果在高CO2氣氛下的耐性和冷害(CI)降低，并出現變色現象?？偟膩碚f，與對照相比，套袋果實的失重率、CI強度、干縮度和硬度低。在高溫(32±1°C)下成熟時，在Biofresh®袋中儲存14天的水果中觀察到大的果皮顏色發育。然而，存放在Xtend？袋中的水果和那些沒有MAP的水果在冷藏7天后才出現可接受的果皮顏色。儲存在Xtend®袋中的水果乙烯含量低(ppm)，重量和硬度損失小，但大部分保持綠色。套袋果實*含量較高，TA含量較低?？傊?，“Samar Bahisht Chaunsa”存放在13°C的Biofresh®袋中，與Xtend®袋和無MAP袋相比，具有更好的外觀、適口性和營養價值

Keywords:chilling injury，Mango，MAP，quality，shelflife，skin discoloration

關鍵詞：冷害、芒果、MAP、品質、貨架期、皮膚變色