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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Interplay between hydrogen sulfide and methylglyoxal initiates thermotolerance in maize seedlings by modulating reactive oxidative species and osmolyte metabolism
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Interplay between hydrogen sulfide and methylglyoxal initiates thermotolerance in maize seedlings by modulating reactive oxidative species and osmolyte metabolism

机译：通过调节反应性氧化物种和Osmolyte代谢，硫化氢和甲基甘油氧基之间的相互作用在玉米幼苗中引发热能阻抗

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摘要

Hydrogen sulfide (H2S) and methylglyoxal (MG) were supposed to be novel signaling molecules in plants. However, whether interplay between H2S and MG can initiate thermotolerance in maize seedlings and in relation to metabolism of reactive oxygen species (ROS) and osmolytes is little known. In this study, watering with MG and NaHS (H2S donor) alone or in combination elevated survival and tissue vigor of maize seedlings under heat stress and coped with an increase in the biomembrane injury (as indicated in membrane lipid peroxidation and electrolyte leakage). The above-mentioned effects were separately weakened by MG scavengers (N-acetyl cysteine: NAC; aminoguanidine: AG) and H2S inhibitor (DL-propargylglycine, PAG) and scavenger (hypotaurine, HT). These suggested that the interplay between H2S and MG initiated the thermotolerance in maize seedlings. The further data indicated that, under non-heat stress and heat stress conditions, MG and NaHS alone or in combination modulated ROS metabolism by regulating the activities of antioxidant enzymes (catalase, ascorbate peroxidase, guaiacol peroxidase, glutathione reductase, monodehydroascorbate reductase, and dehydroascorbate reductase) and the contents of non-enzymatic antioxidants (ascorbic acid, glutathione, flavonoids, and carotenoids) in maize seedlings. In addition, MG and NaHS alone or in combination also separately modulated the metabolism of osmolytes (proline, trehalose, glycine betaine, and total soluble sugar), H2S (L-cysteine desulfhydrase and O-acetylserine (thione) lyase), and MG (glyoxalase I, glyoxalase II, and MG reductase). These physiological effects also were separately impaired by NAC, AG, PAG, and HT. The current data illustrated that the interplay between H2S and MG initiated the thermotolerance in maize seedlings by modulating ROS, osmolyte, H2S, and MG metabolism.
机译：硫化氢（H 2 S）和甲基乙二醛（Mg）应该是植物中的新型信号分子。然而，H 2 S和Mg之间的相互作用是否可以在玉米幼苗中引发热能，并且与反应性氧物质（ROS）的代谢相关，并且渗透物也很少知道。在本研究中，单独使用Mg和NaH（H2S供体）或在热应激下组合升高的玉米幼苗的存活率和组织活力，并在生物膜损伤增加（如膜脂质过氧化和电解质泄漏中所示）。 Mg清除剂（N-乙酰半胱氨酸：NaC;氨基胍：Ag）和H 2 S抑制剂（D1-丙基甘氨酸，PAG）和清除剂（低辐射，HT）单独削弱上述效果。这些建议H2S和MG之间的相互作用在玉米幼苗中引发了热能。进一步的数据表明，通过调节抗氧化酶的活性（过氧化氢酶，抗坏血物过氧化物酶，GuaiaIacol过氧化物酶，谷胱甘肽还原酶，单羟氰基酯还原酶和脱氢原料酶，单羟基血脂酶，单羟基血基酶，单羟基血基酸还原酶和脱氢原料酶，单次胱凋亡酶和脱氢原料酶和脱氢血醇酶和脱氢原料酶玉米幼苗中还原酶）和非酶促抗氧化剂（抗坏血酸，谷胱甘肽，黄酮类化合物和类胡萝卜素）的含量。此外，单独或组合的Mg和NaH也分别调节渗透物（脯氨酸，海藻糖，甘氨酸甜菜碱和总可溶性糖）的代谢，H 2 S（L-半胱氨酸脱硫酶和O-乙酰碱（Thione）裂解酶）和Mg（乙醛酸酶I，乙醛酸酶II和Mg还原酶）。这些生理效果也被NAC，Ag，PAG和HT分开损害。目前的数据示出了通过调节ROS，Osmolyte，H 2 S和Mg代谢，H2S和Mg之间的相互作用在玉米幼苗中引发了热能阻能度。

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