如何缓解大麦中Cd诱导的植物毒性,Hordeum vulgare L.?
Nadia Khlifi1, Rim Ghabriche1, Imen Ayachi1
1Laboratory of Extremophile Plants, Biotechnology Center of BorjCedria, BP 901, Hammam-Lif, 2050, Tunis, Tunisia.
Chemosphere
|July 5, 2024
概括
(Si) 补充剂显著降低了大麦植物中的 (Cd) 毒性. Si减轻了Cd的吸收和积累,降低了与食用污染食品相关的健康风险.
科学领域:
- 环境科学 环境科学
- 植物科学 植物科学
- 毒理学 毒理学 毒理学
背景情况:
- 有毒的重金属,特别是 (Cd),在食用植物中积累,对人类健康构成风险.
- 由于Cd具有很高的生物可用性,并且通过食物消费向人类转移,因此需要采取减少植物吸收的策略.
- (Si) 已被提议作为一种潜在的代理物来限制植物中的Cd转移.
研究的目的:
- 评估 (Si) 供应对大麦 (Hordeum vulgare L.) 中 (Cd) 吸收和积累的影响.
- 评估Si在缓解Cd诱导毒性的作用及其对植物生长和生理学的影响.
主要方法:
- 在21天的时间里用水培种植大麦.
- 治疗组包括0或15μM Cd2+ 结合或没有0.5mM Si.
- 分析生长,光合作用,Cd在植物器官中的积累,以及芽中的亚细胞分布.
主要成果:
- 仅仅暴露于就会导致严重的毒性症状 (化,亡) 和减少生物量.
- (0.5毫米) 显著降低了Cd诱导的毒性,恢复了植物生长,光合作用和营养.
- Si降低了植物中的Cd度,并改变了其亚细胞分布,增强了细胞壁的固定,减少了细胞质/细胞器分数.
结论:
- 的应用显著提高了大麦植物中的耐受性.
- Si有效地减少了可食植物中的Cd积累,从而降低了人类健康风险.
- Si的机制涉及改进的植物生理学和改变的Cd亚细胞细分.
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