Department of Chemistry, University of Iowa, Iowa City, Iowa, United States of America.
College of Pharmacy, University of Iowa, Iowa City, Iowa, United States of America.
PLoS One. 2018 Dec 17;13(12):e0208732. doi: 10.1371/journal.pone.0208732. eCollection 2018.
Hydrogen sulfide (H2S) is a key gasotransmitter in agriculture and has been reported to increase the growth of plants in the first two weeks and to mitigate the effects of environmental stressors. GYY-4137 is widely used in these studies because it slowly releases H2S, but there is disagreement as to whether it requires enzymes to release H2S. In this article we describe the release of H2S in water without enzymes and that it releases H2S faster in organic solvents than in water or when mixed in topsoil. Furthermore, we describe the long-term effect of dosing pea, radish, and lettuce plants with GYY-4137 for up to six weeks. The effect of GYY-4137 on plant growth for six weeks was either positive or negative depending on the loading of GYY-4137 and how it was applied to plants. The addition of GYY-4137 to lettuce plants via potting mix resulted in reduced growth and death of the plants. In contrast, application of GYY-4137 to the leaves of lettuce plants increased the harvest weight of the leaves by up to 86%. Our results demonstrate that GYY-4137 can have a positive, important effect on the growth of plants but that this effect is dependent on several factors.
硫化氢 (H2S) 是农业中一种重要的气体递质，据报道，它可以在最初的两周内促进植物的生长，并减轻环境胁迫的影响。GYY-4137 因其能缓慢释放 H2S 而被广泛用于这些研究中，但对于它是否需要酶来释放 H2S 存在争议。在本文中，我们描述了在没有酶的情况下 H2S 在水中的释放，以及它在有机溶剂中比在水中或与表土混合时更快地释放 H2S。此外，我们还描述了用 GYY-4137 对豌豆、萝卜和生菜植物进行长达六周的处理的长期影响。GYY-4137 对植物生长的影响在六周内是积极的还是消极的，取决于 GYY-4137 的负载以及它如何应用于植物。通过盆栽混合物向生菜植物中添加 GYY-4137 会导致植物生长减少和死亡。相比之下，将 GYY-4137 应用于生菜植物的叶子会使叶子的收获重量增加多达 86%。我们的结果表明，GYY-4137 可以对植物的生长产生积极的、重要的影响，但这种影响取决于几个因素。
