Hydrogen Sulfide: A Gaseous Molecule in Postharvest Freshness.
Hydrogen Sulfide: A Gaseous Molecule in Postharvest Freshness.
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硫化氢：采后新鲜中的气态分子
DOI：
10.3389/fpls.2018.01172
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发表时间：
2018
影响因子：
5.6
通讯作者：
Liao W
中科院分区：
文献类型：
--
作者：
Huo J;Huang D;Zhang J;Fang H;Wang B;Wang C;Liao W
硫化氢（H2S）作为一种信号分子，参与植物生长发育的调控。近年来的研究表明，H2S在调节园艺产品采后衰老中也起着重要作用。本文综述了植物体内H2S的合成及其在缓解切花、水果和蔬菜采后衰老中的潜在作用。在园艺产品采后处理过程中，H2S可通过促进抗氧化酶的活性来清除活性氧，从而维持膜的完整性。H_2S处理可提高果实脯氨酸和多酚类化合物的含量，从而有效地提高果实的耐冷性。在易腐果蔬采后贮藏过程中，H2S通过抑制真菌孢子的生长，显著减轻了由真菌引起的腐烂。此外，H2S与其他分子协同（NO）或拮抗（乙烯），以减轻园艺产品的衰老。在转录水平上，H2S通过调控衰老相关基因的表达，延缓园艺产品的衰老，这些基因与蛋白质和叶绿素的降解有关。因此，H2S不仅具有积极的抗氧化和抗真菌特性，而且在园艺产品采后期间显著调节衰老相关基因。未来H2S在果蔬采后贮藏中的研究重点应放在其在蛋白质翻译后修饰中的分子机制以及其在处理果蔬中的安全属性。
Hydrogen sulfide (H2S), as a signaling molecule, is involved in the regulation of growth and development in plants. Recent studies have indicated that H2S also plays important roles in regulating postharvest senescence of horticultural products. The focus of this review is to summarize the synthesis of H2S in plants and its potential roles in alleviating the senescence of cut flowers, fruits, and vegetables during postharvest storage. During postharvest of horticultural products, H2S could scavenge reactive oxygen species via promoting the activity of antioxidant enzymes, thereby, sustaining the integrity of the membrane. In fruits, H2S effectively enhanced the tolerance of chilling by increasing the content of proline and polyphenol compounds. During postharvest storage of perishable fruits and vegetables, H2S significantly alleviated decay, which was caused by fungi by inhibiting the growth of fungi spores. Moreover, H2S interacted with other molecules synergistically (NO) or antagonistically (ethylene) to alleviate senescence of horticultural products. At the transcriptional level, H2S regulated the expression of senescence-related genes, which were related to degradation of proteins and chlorophyll, to delay the senescence of horticultural products. Thus, H2S does not only possess positive antioxidant and antifungal properties, but also significantly regulates the senescence-related gene during postharvest of horticultural products. Future studies of H2S in postharvest storage should focus on its molecular mechanism in the posttranslational modifications of proteins as well as its safety attributes in treated fruits and vegetables.
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