过度表达AspAT减轻了对Populus tomentosa根部发育的抑制作用
Meiji Chen1, Lang He1, Deyang Liang1
1College of Forestry, Guizhou University, Guiyang, 550025, China.
Biochemical and biophysical research communications
|January 1, 2025
概括
酸氨基转移酶 (AspAT) 基因,AspAT13和AspAT15,通过增强和抗氧化防御,提高植物对毒性的耐受性. 过度表达可以促进根生长和Populus植物中的关键代谢化合物.
科学领域:
- 植物生理学 植物生理学
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 氨的毒性阻碍了植物的生长,这是由于长时间使用它作为源.
- 改善氨同化是减轻毒性的关键策略.
- 酸氨基转移酶 (AspAT) 在这个过程中的作用尚不清楚.
研究的目的:
- 调查AspAT在缓解Populus中的氨毒性的功能.
- 阐明AspAT作用背后的生理机制.
主要方法:
- 在氨压力下对Populus AspAT基因的基因表达分析.
- 转基因Populus植物中AspAT13和AspAT15的过度表达.
- 测量同化酶活动,代谢物水平,抗氧化酶活动,氨含量和植物激素水平.
主要成果:
- AspAT13和AspAT15表现出高根性表达,并由诱导.
- 过度表达AspAT13和AspAT15增加了根生物质,GS和GOGAT活动,可溶性蛋白质,糖和氨基酸含量.
- 转基因植物表现出增强的抗氧化酶活性 (SOD,CAT) 和减少的根氨含量.
- 在转基因根中,IAA,ACC,IBA和BR激素的水平增加.
结论:
- AspAT13和AspAT15对于减轻Populus中的氨毒性至关重要.
- 它们的功能包括增强同化,提高抗氧化能力,调节辅酶和类固醇信号通路.
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