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生物炭修改对Bidens pilosa L中的Cd积累的影响:改变Cd的亚细胞分布,细胞壁多糖体的Cd结合能力和组成

Xinying Zhang¹, Jingxian Lu¹, Panxue Gu²

¹College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.

Plant physiology and biochemistry : PPB

|October 11, 2024

概括

玉米生物炭通过将其固定在细胞壁中并增强细胞内分离,减少Bidens pilosa L.的 (Cd) 吸收,而半纤维素中的银酸在Cd结合中起着关键作用.

科学领域:

环境科学环境科学
植物生物学植物生物学
生物地质化学生物地质化学

背景情况:

(Cd) 污染对生态系统和人类健康构成风险.
生物炭应用是一种减轻植物重金属毒性的策略.
生物炭对Cd吸收的影响的亚细胞机制需要进一步研究.

研究的目的:

为了研究玉米生物炭对Bidens pilosa L.中Cd积累在亚细胞水平的影响.
阐明细胞壁组件在Cd排毒中的作用.

主要方法:

在90天内,用玉米草生物炭和Bidens pilosa L.进行盆栽实验.
微分离心法用于亚细胞分数提取.
液离心法用于从根细胞壁中提取多糖分.
在各种分数中确定Cd含量.

主要成果:

Cd主要分布在Bidens pilosa L.器官的细胞壁中.
生物炭添加将Cd分布从细胞壁转移到茎中的可溶性分数和有机体.
标识了pectin作为一个主要的Cd沉,与galacturonic酸是一个重要的组成部分.
半纤维素中的银酸与生物炭添加后的Cd含量变化相关.

结论:

细胞壁固定和细胞内分离是由Bidens pilosa L.中生物炭诱导的关键解毒机制.
细胞壁中的甲酸多糖,特别是半纤维素,对于Cd结合至关重要.
生物炭在应对Cd压力时改变根细胞壁组成,减少Cd的生物可用性.

关键词:

比登斯·皮洛萨 L. 的作品.生物炭是一种生物炭.是的组成部分.细胞壁上的细胞壁.植物疗法 (Phytoremediation) 是一种植物疗法.亚细胞分布亚细胞分布

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