The present study showed that hydrogen sulfide (H₂S) plays a critical role in reducing the colour change of Lanzhou lily during storage, which has not been previously reported. We detected the colour change, especially the violet-red colour, of lily-bulb scales that were treated with different concentrations of NaHS (a H₂S donor) by the L*, a * and b* and the browning degree of the scale surface. The colour change was reduced as the NaHS concentration increased. Among the different concentrations tested, 0.8 mM NaHS was optimal, which remarkably improved the appearance quality of the scales and decreased the content of total anthocyanins. The results of the HPLC analysis showed that the anthocyanin compounds might be cyanidin. These results indicated that H₂S improves the appearance quality of the Lanzhou lily might by regulating the content of anthocyanins. Moreover, the changes in the anthocyanin synthesis-related gene expression were inhibited by NaHS. This was consistent with the anthocyanin synthesis-related key enzyme activity. Thus, H₂S decreased the colour change caused by anthocyanin accumulation by regulating the activity and gene expression of key enzymes in the anthocyanin synthesis pathway, thereby improving the appearance quality of the scales of Lanzhou lily during postharvest storage.

目前的研究表明，硫化氢（H ₂ S）在减少兰州百合贮藏期间的颜色变化中起着至关重要的作用，这尚未有过报道。我们检测了用L *，a *和b *以及鳞片的褐变程度用不同浓度的NaHS（H ₂ S供体）处理过的百合鳞片的颜色变化，尤其是紫红色。表面。随着NaHS浓度的增加，颜色变化减少。在不同的测试浓度中，0.8 mM NaHS是最佳的，这可以显着改善鱼鳞的外观质量，并降低总花色苷的含量。HPLC分析的结果表明，花青素化合物可能是花青素。这些结果表明H ₂S通过调节花青素的含量来改善兰州百合的外观质量。此外，NaHS抑制了花色苷合成相关基因表达的变化。这与花色苷合成相关的关键酶活性是一致的。因此，H ₂ S通过调节花青素合成途径中关键酶的活性和基因表达，减少了花青素积聚引起的颜色变化，从而提高了兰州百合收获后鳞片的外观质量。