外源硫化在减轻植物中的毒性的作用:全面的元分析
Hanping Cao1, Kejin Song1, Yingying Hu1
1School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China.
Environmental science and pollution research international
|April 13, 2024
概括
外源硫化 (H2S) 应用显著改善了 (Cd) 应激下植物生长和抗氧化能力. 这一元分析表明,H2S减少了Cd的积累,提高了植物的耐受性,为农业补救提供了一种策略.
科学领域:
- 环境科学 环境科学
- 植物生物学 植物生物学
- 生物化学 生化学
背景情况:
- (Cd) 污染对农业和人类健康构成重大风险.
- 硫化 (H2S) 是一种参与植物应激反应的信号分子.
- 关于在Cd压力下对植物生理学H2S影响的有限的综合数据存在.
研究的目的:
- 进行对外源H2S对植物生长,抗氧化特性和在Cd压力下基因表达的影响的元分析.
- 综合现有研究的发现,以提供对H2S疗效的定量评估.
- 阐明H2S减轻植物中Cd毒性的机制.
主要方法:
- 来自27篇发表文章的575个观察结果的元分析.
- 关于植物生长参数,抗氧化酶活性和Cd含量的数据的定量合成.
- 分析与应激反应途径相关的基因表达数据.
主要成果:
- 外源H2S显著缓解了Cd诱导的生长抑制,增强了根的长度,植物的高度,新鲜重量,干重量和叶绿素含量.
- H2S增强了抗氧化酶活性 (例如,催化酶) 并减少了活性氧物种 (ROS) 的积累.
- H2S阻碍了Cd从根部转移到芽部,降低了干部Cd含量,并影响了相关通路中的基因表达.
结论:
- 外源H2S通过改善生长,增强抗氧化防御和减少Cd积累,有效地减轻植物中的Cd毒性.
- H2S的有效性因植物物种,H2S供体度 (NaHS> 200μM可能有害),应用方法和种植方式而异.
- 作为一项打击农业中Cd污染的战略,H2S显示出有前途.
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