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特定路线的植物毒性:叶状聚乙烯纳米塑料抑制了大米光合作用

Ruijie Zhu¹, Yuhuai Wang², Yuan Yuan^3,4

¹State Key Laboratory of Water Pollution Control and Green Resource Recycling, School of Environment, Nanjing University, Nanjing 210023, China.

Environmental science & technology

|January 23, 2026

概括

应用于大米叶的聚乙烯纳米颗粒 (PSNP) 通过积聚在叶绿体中来抑制光合作用,从而损害了关键的光合作用过程. 这种叶子暴露对作物产量和全球粮食安全构成威胁.

科学领域:

环境科学环境科学
植物生物学植物生物学
纳米技术纳米技术

背景情况:

纳米粒子 (NP) 在环境中越来越普遍.
聚乙烯NP (PSNP) 是常见的环境污染物.
PS NP对作物植物的影响需要进一步调查.

研究的目的:

调查大米 (Oryza sativa L.) 中的PS NPs的植物毒性.
为了比较根与叶暴露于PS NP的影响.
为了阐明PSNP诱导的光合作用抑制的机制.

主要方法:

用不同的PSNP剂量进行水培和土壤暴露实验.
混焦成像用于追踪 PS NP 在大米叶中的定位.
生物化学分析测量光合作用色素含量,酶活动和ATP生产.
对光合作用速率,口腔导电率和透气的生理测量.
转录组分析以确定遗传反应.

主要成果:

叶子暴露于PS NPs导致持续的光合作用抑制,而根暴露仅在高剂量下抑制光合作用.
在大米叶中积累的PSNP,与叶绿体局部化,导致受光依赖反应和碳固定受损.
观察到光合作用色素,希尔反应活性,ATP生产,净光合作用率,鲁比斯科活性,口腔导电性和透气率的显著减少.
转录组分析揭示了核心光合作用途径和相关基因的下调.

结论:

叶子暴露于PSNP会诱导大米显著的植物毒性,主要是通过破坏质细胞水平的光合作用.
在质体内PSNP的积累和同位是驱动光合作用抑制的关键机制.
大气中的NP代表着对农业生产率和全球粮食安全的新兴威胁.

关键词:

类塑料是一种类塑料.定位化,定位化的地方.暴露路径暴露路径纳米塑料的纳米塑料光合作用光合作用.转录组 (transcriptome) 是一个转录组.

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