可以通过调解叶绿体完整性,抗氧化系统和HVNRAMP表达来增强大麦中的耐受性
Farah Kanwal1, Asad Riaz2, Ameer Khan1
1Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou 310029, PR China.
Journal of hazardous materials
|September 14, 2024
概括
添加 (Mn) 显著降低 (Cd) 毒性和大麦植物中的积累. 这项研究表明,Mn减轻了负面的生理影响,并改变了与大麦幼苗中重金属运输和抗氧化剂防御相关的基因表达.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 植物生理学 植物生理学
背景情况:
- (Cd) 是一种有毒的重金属,影响着全球的作物生产和食品安全.
- 了解农作物中Cd毒性的缓解策略对于可持续农业至关重要.
研究的目的:
- 调查 (Mn) 减轻 (Cd) 毒性的潜力,并减少在大麦中的积累.
- 在Cd压力下分析Mn对大麦生理参数和基因表达的影响.
主要方法:
- 对Cd耐受性 (WSBZ) 和对Cd敏感性 (Dong17) 的大麦幼苗的水培培养.
- 用不同度的Cd (0.1和1.0μM) 和Mn (0.2μM) 单独和组合治疗21天.
- 评估与抗氧化酶和金属载体相关的生长,生理参数和基因表达 (例如, HvSOD, HvCAT, HvNRAMPs, HvYSLs, HvHMA2/3).
主要成果:
- 在两个大麦基因型中,Mn的添加显著减轻了Cd压力对生长和生理参数的负面影响.
- 暴露于Cd会增加Cd的积累,并增强抗氧化酶基因 (HvSOD, HvCAT, HvAPX, HvPOD) 的表达.
- Mn和Cd治疗显著上调HVNRAMPs基因,HVNRAMP1通过Mn显著上调,表明其在Mn吸收中的作用. 通过联合Mn和Cd治疗,HVYSL2,HVIRT1和HVMTP8的表达被上调,而HVYSL5,HVHMA2和HVHMA3被抑制.
结论:
- 足够的供应对于减少植物中的吸收和积累至关重要.
- 通过影响植物生理学和调节参与金属运输和排毒的基因,在缓解Cd毒性的过程中发挥着至关重要的作用.
- 该研究强调了的潜力,作为一种提高作物抵抗Cd污染的策略.
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