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微塑料在由共生微生物介导的土壤植物系统中的迁移和积累及其生态影响

Xinru Li¹, Feng Shi², Min Zhou³

¹State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

Environment international

|August 21, 2024

概括

状菌根真菌 (AMF) 影响微塑料 (MP) 的吸收和毒性在植物不同基于MP大小. AMF增强了小MP的吸收和毒性,同时减少了大MP的影响,影响土壤环境.

科学领域:

环境科学环境科学
土壤科学土壤科学
微生物学微生物学

背景情况:

土壤中的微生物显著影响微塑料 (MP) 的环境行为和生态效应.
了解MP微生物相互作用的机制,特别是与共生真菌的相互作用,至关重要但有限.
树状菌根真菌 (AMF) 是常见的土壤共生体,在MP命运中具有潜在的作用.

研究的目的:

研究AMF对植物中不同尺寸的微塑料 (MP) 的吸收和迁移的影响.
确定AMF如何影响宿主植物上具有不同颗粒大小的MP的毒性.
阐明土壤植物系统中AMF介导的MP相互作用的潜在机制.

主要方法:

使用作为宿主植物进行的受控实验,有或没有AMF接种.
在土壤环境中应用小 (0.5微米) 和大 (2微米) 微塑料.
在植物组织中量化MP含量.
评估植物生理和生化参数 (生物质,光合作用,抗氧化酶活性).
微观观察根结构和AMF殖民 (内拉基和外拉基).

主要成果:

AMF显著改变了沙拉的MP吸收,增加了小MP吸收 (1.26倍),并减少了大MP吸收 (77.62%).
亚胺菌加剧了小MP的毒性 (减少生物质,光合作用),但减轻了大MP的毒性 (增加植物高度,抗氧化活性).
AMF形成了共生结构 (海),增强了小MP吸收的途径,同时促进了小MP迁移和大MP在土壤中的固定.

结论:

在土壤-植物系统中,AMF对微塑料吸收和毒性的影响取决于尺寸.
在AMF和植物之间的共生关系改变根结构,影响MP运输和植物反应.
这些发现为土壤微生物,微塑料和植物之间的复杂相互作用提供了关键的见解,为陆地生态系统的风险评估提供了信息.

关键词:

吸收方式吸收方式微生物微生物微塑料是一种微塑料.赖索斯菲尔的结构结构尺寸效应尺寸效应尺寸效应尺寸效应

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