Hydrogen sulfide prolongs postharvest storage of fresh-cut pears (Pyrus pyrifolia) by alleviation of oxidative damage and inhibition of fungal growth.
Hydrogen sulfide prolongs postharvest storage of fresh-cut pears (Pyrus pyrifolia) by alleviation of oxidative damage and inhibition of fungal growth.
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硫化氢通过减轻氧化损伤和抑制真菌生长来延长鲜切梨（Pyrus perifolia）的采后储存时间
DOI：
10.1371/journal.pone.0085524
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Zhang H
中科院分区：
文献类型：
--
作者：
Hu KD;Wang Q;Hu LY;Gao SP;Wu J;Li YH;Zheng JL;Han Y;Liu YS;Zhang H
硫化氢（H2S）已被证明是植物和动物中的多功能信号分子。在这里，我们研究了 H2S 在鲜切梨 (Pyruspyrifolia) 腐烂中的作用。硫氢化钠（NaHS）释放的H2S气体以剂量依赖性方式延长鲜切梨片的保质期。此外，H2S使梨片中的还原糖和可溶性蛋白质保持较高水平。 H2S 显着减少过氧化氢 (H2O2)、超氧自由基 (•O2 −) 和丙二醛 (MDA) 的积累。进一步研究表明，H2S熏蒸上调了抗坏血酸过氧化物酶（APX）、过氧化氢酶（CAT）和愈创木酚过氧化物酶（POD）等抗氧化酶的活性，同时下调了脂氧合酶（LOX）、苯丙氨酸解氨酶（PAL）和多酚氧化酶（PPO）的活性。此外，H2S熏蒸有效抑制了梨的两种真菌病原菌黑曲霉和扩展青霉的生长，表明H2S可以开发为采后贮藏的有效杀菌剂。本研究表明，H2S 通过充当抗氧化剂和杀菌剂来延长梨采后的储存时间。
Hydrogen sulfide (H2S) has proved to be a multifunctional signaling molecule in plants and animals. Here, we investigated the role of H2S in the decay of fresh-cut pears (Pyrus pyrifolia). H2S gas released by sodium hydrosulfide (NaHS) prolonged the shelf life of fresh-cut pear slices in a dose-dependent manner. Moreover, H2S maintained higher levels of reducing sugar and soluble protein in pear slices. H2S significantly reduced the accumulation of hydrogen peroxide (H2O2), superoxide radicals (•O2 −) and malondialdehyde (MDA). Further investigation showed that H2S fumigation up-regulated the activities of antioxidant enzymes ascorbate peroxidase (APX), catalase (CAT), and guaiacol peroxidase (POD), while it down-regulated those of lipoxygenase (LOX), phenylalanine ammonia lyase (PAL) and polyphenol oxidase (PPO). Furthermore, H2S fumigation effectively inhibited the growth of two fungal pathogens of pear, Aspergillus niger and Penicillium expansum, suggesting that H2S can be developed as an effective fungicide for postharvest storage. The present study implies that H2S is involved in prolonging postharvest storage of pears by acting as an antioxidant and fungicide.
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