不同保鲜袋包装对雾培马铃薯微型种薯贮藏保鲜效果的影响

Effect of Different Preservative Bags on Postharvest Storage Quality of Mini⁃Tuber Seed Potatoes from Aeroponic System

为了明确不同保鲜袋包装对雾培马铃薯微型种薯贮藏保鲜效果的影响,以大西洋雾培微型种薯为试材,通过测定种薯块茎贮藏期间的失重率、发芽率和腐烂率及其相关生理指标等,探究4种保鲜袋对微型种薯的贮藏保鲜效果。结果表明,在(20±1)℃下,与普通网袋(CK)相比,普通A膜袋、纳米保鲜袋、核桃保鲜袋、蒜薹保鲜袋等4种保鲜袋均能有效改善微型种薯的贮藏保鲜效果,其中以核桃保鲜袋和纳米保鲜袋对微型种薯的贮藏保鲜效果较佳。这2种保鲜袋包装均能够明显降低微型种薯的失重率,且以纳米保鲜袋包装微型种薯的腐烂率最低,贮藏84 d,核桃保鲜袋和纳米保鲜袋包装微型种薯的失重率分别较CK降低73.20%、63.62%,核桃保鲜袋包装微型种薯的腐烂率较CK升高21.43%,纳米保鲜袋包装微型种薯的腐烂率较CK降低31.25%;抑制相对电导率和丙二醛(MDA)含量的上升速度,减少细胞膜的受损程度,贮藏70 d,核桃保鲜袋和纳米保鲜袋包装微型种薯的MDA含量分别较CK降低23.26%、13.95%;同时,还可促进过氧化物酶(POD)、过氧化氢酶(CAT)及超氧化物歧化酶(SOD)活性的提高,减少氧自由基的伤害,并能够正常发芽,对雾培微型种薯具有良好的贮藏保鲜效果。综合考虑,建议在雾培微型种薯贮藏期间采用纳米保鲜袋包装。

In order to clarify the effect of different preservative bags on postharvest storage quality of mini⁃tuber seed potatoes from aeroponic system,‘Atlantic’mini⁃tuber seed potatoes were used as materials,the storage and preservation effects of four types of preservation bags on the mini⁃tuber seed potatoes were investigated by measuring the weight loss rate,germination rate,decay rate,and related physiological indicators of the seed tubers during storage.The results showed that at(20±1)℃,compared with ordinary mesh bags(CK),four types of preservation bags,including ordinary A⁃film bags,nano preservation bags,walnut preservation bags,and garlic sprout preservation bags,could effectively improve the storage and preservation effect of mini⁃tuber seed potatoes.Among them,walnut preservation bags and nano preservation bags had the best storage and preservation effect on mini⁃tuber seed potatoes.Using these two types of preservation bags for package could significantly reduce the weight loss rate of mini⁃tuber seed potatoes,and mini⁃tuber seed potatoes packaged in nano preservation bags had the lowest decay rate,after 84 days of storage,the weight loss rates of mini⁃tuber seed potatoes packaged in walnut preservation bags and nano preservation bags were reduced by 73.20%and 63.62%compared with CK,respectively.The decay rate of mini⁃tuber seed potatoes packaged in walnut preservation bags increased by 21.43%compared with CK,while the decay rate of mini⁃tuber seed potatoes packaged in nano preservation bags decreased by 31.25%compared with CK.They could inhibit the rising speed of relative conductivity and malondialdehyde(MDA)content,and reduce the damage of cell membrane,after 70 days of storage,the MDA contents of mini⁃tuber seed potatoes packaged in walnut preservation bags and nano preservation bags were reduced by 23.26%and 13.95%compared with CK,respectively.At the same time,they could also promote the activities of peroxidase(POD),catalase(CAT)and superoxide dismutase(SOD),reduce the damage of oxygen free radicals,and make potatoes germinate normally,so they had a good storage and fresh⁃keeping effect on aeroponic cultured micro seed potatoes.By comprehensive consideration,it is recommended to use nano preservation bags for package during the storage of mini⁃tuber seed potatoes from aeroponic system.