Combined effects of ascorbic acid and chitosan on the quality maintenance and shelf life of plums
Combined effects of ascorbic acid and chitosan on the quality maintenance and shelf life of plums
复制标题
抗坏血酸和壳聚糖联合作用对李子品质保持和货架期的影响
DOI：
10.1016/j.scienta.2014.06.027
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发表时间：
2014-09-11
影响因子：
4.3
通讯作者：
Liu, Jinxiang
中科院分区：
文献类型：
--
作者：
Liu, Kaidong;Yuan, Changchun;Liu, Jinxiang
研究了壳聚糖（CTS）和抗坏血酸（阿萨）复合处理对李采后品质保持和货架期的影响。CV.“三花里”）进行了调查。用包括水（对照）、40.0 mM阿萨、1.0%CTS和与1.0%CTS组合的40.0 mM阿萨的水溶液处理果实;将所有样品在5 +/-1 ℃和90 +/-5%相对湿度下储存20天。测定了果实硬度、失重率、呼吸强度、可溶性固形物含量、可滴定酸、抗坏血酸、颜色特性（L*、C* 和h）和花青素含量，沿着超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）、多酚氧化酶（POD）、多聚半乳糖醛酸酶（PG）、果胶甲酯酶（PME）和苯丙氨酸解氨酶（PAL）的比活性。结果表明，与对照相比，阿萨和CTS配合使用可保持组织硬度，抑制呼吸速率的增加，减少颜色变化。MA和CTS联合治疗的疗效优于阿萨或CTS单独治疗。软化抑制与PME和PG活性降低有关。此外，阿萨和CTS组合处理的李子在整个贮藏期间也表现出显著降低的PPO活性和显著升高的SOD、POD和CAT活性。在采后贮藏过程中，阿萨和CTS的组合显著抑制了花青苷的合成，并伴随着PAL活性的降低。此外，超氧自由基（O2（中心点-））和丙二醛（MDA）的产生显着降低处理的果实。这些结果清楚地表明，40.0 mM阿萨和1.0%CTS处理可以是一种有效的手段，有助于延长货架期和保持在贮藏期间的李子的品质。(C)© 2014 Elsevier B. V.保留所有权利。
The combined effects of chitosan (CTS) and ascorbic acid (AsA) on the quality maintenance and shelf life of harvested plums (Prunus salicina Lindley. cv. 'Sanhuali') were investigated. The fruits were treated with aqueous solutions including water (control), 40.0 mM AsA, 1.0% CTS, and 40.0 mM AsA combined with 1.0% CTS; all samples were stored at 5 +/- 1 degrees C and 90 +/- 5% relative humidity for 20 days. Fruit firmness, weight loss, respiration rate, soluble solids content, titratable acidity, ascorbic acid, color characteristics (L*, C*, and h), and anthocyanin contents were measured, along with the specific activities for superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), polyphenol oxidase (POD), polygalacturonase (PG), pectin methylesterase (PME), and phenylalanine ammonia lyase (PAL). The results showed that AsA and CTS combined maintained tissue firmness, inhibited an increased respiration rate, and decreased color changes, as compared with the control. The efficiency was better for the combined MA and CTS treatment than AsA or CTS alone. The inhibition of softening was associated with decreased PME and PG activities. Furthermore, plums treated with the AsA and CTS combination also exhibited a significantly lower PPO activity and significantly higher SOD, POD, and CAT activities throughout the storage period. During postharvest storage, anthocyanin synthesis was significantly inhibited with the combination of AsA and CTS and was accompanied by decreased PAL activity. Moreover, the production of superoxide free radicals (O2(center dot-)) and malondialdehyde (MDA) was significantly decreased in the treated fruits. These results clearly indicated that the 40.0 mM AsA and 1.0% CTS treatment could be an effective means to contribute to the shelf-life extension and quality maintenance of plums during storage. (C) 2014 Elsevier B.V. All rights reserved.