AhGSNOR1通过调节细胞内NO和氧化还原水平来负面调节Al诱导的编程细胞死亡
Chunliu Pan1, Xia Li2, Changge Jian2
1Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, Guangxi University, Nanning, 530004, China; Guangxi Botanical Garden of Medicinal Plants, Nanning, 530004, China; College of Agriculture, Guangxi University, Nanning, 530004, China.
Plant science : an international journal of experimental plant biology
|September 28, 2024
概括
这项研究表明,植物对 (Al) 的耐受性通过S-尼托氨酸氨基酸还原酶 (GSNOR) 得到改善. GSNOR作为Al诱导的编程细胞死亡 (PCD) 的负调节剂,增强在酸性土壤中的植物生存.
科学领域:
- 植物生物学 植物生物学
- 环境毒理学环境毒理学
- 分子生物学分子生物学
背景情况:
- 酸性土壤中的 (Al) 毒性严重阻碍了植物生长和作物生产率.
- 编程细胞死亡 (PCD) 是植物对抗Al毒性的关键防御机制.
- 在Al诱导的PCD中S-尼特罗斯格氨酸减少酶 (GSNOR) 的作用仍然在很大程度上未被探索.
研究的目的:
- 为了研究S-尼特罗斯氨酸氨基还原酶 (GSNOR) 在植物对 (Al) 毒性的反应中的功能.
- 为了确定GSNOR是否在调节Al诱导的编程细胞死亡 (PCD) 中发挥作用.
- 阐明GSNOR影响植物Al耐受性的分子机制.
主要方法:
- 在Al压力下分析AhGSNOR1的转录和蛋白质表达.
- 生产和表征超表达AhGSNOR1的转基因烟草植物.
- 测量氧化 (NO) 和S-酸盐醇水平,根延长,细胞死亡和抗氧化酶活性.
- 研究AhGSNOR1和AhTRXh之间的体内相互作用及其对Trxh3表达的影响.
主要成果:
- 压力诱导了AhGSNOR1.1的转录和蛋白质表达.
- 过度表达 AhGSNOR1 减少了 Al 诱导的氧化 (NO) 和 S - 尼特罗斯醇的积累.
- 过度表达AhGSNOR1减轻了Al对根延长和细胞死亡的抑制作用,同时增强了抗氧化活性.
- 发现AhGSNOR1与AhTRXh直接相互作用,积极调节Trxh3转录.
结论:
- AhGSNOR1 功能作为 Al 诱导的编程细胞死亡 (PCD) 的负调节剂.
- AhGSNOR1通过调节细胞内氧化 (NO) 和氧化还原稳态来提高植物的Al-耐受性.
- 与AhTRXh的相互作用和Trxh3表达的调节是GSNOR在Al耐受性中的关键机制.
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