通过调节素,细胞壁加厚和碳水化合物代谢,Oryza rufipogon和纳米颗粒减轻了纳米塑料的毒性

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Weiwei Xia¹, Jiacheng Jin¹, Shafaqat Ali²

¹State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Base Bank for Lingnan Rice Germplasm Resources, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Plant Molecular Breeding, College of Agriculture, South China Agricultural University, Guangzhou 510642, China.

International journal of biological macromolecules

|August 29, 2025

概括

野生大米 (Oryza rufipogon) 对纳米塑料 (NP) 具有显著的耐受性,与对照大米品种相比,其生长减少和细胞完整性得到改善. 纳米的应用进一步增强了植物从NP压力中恢复.

科学领域:

环境科学
植物生物学
毒理学

背景情况:

纳米塑料对植物健康和农业可持续性构成越来越大的威胁.
野生大米 (Oryza rufipogon) 以其性而闻名,使其成为研究植物应激耐受性的潜在模型.

研究的目的:

研究野生大米 (Oryza rufipogon,HY品种) 对纳米塑料压力的耐受性.
评估纳米 (n-Se) 在野生大米中减轻纳米塑料诱导损害的有效性.
在纳米塑料压力下比较野生大米和栽培大米 (Oryza sativa,MX品种).

主要方法:

在纳米塑料压力下对植物生长 (根和茎长度),叶绿素含量和细胞完整性 (TEM,SEM,CLSM) 的比较分析.
对抗氧化酶活动 (SOD,POD,GSH) 和素沉积的评估.
转录组分析以确定纳米塑料应激反应中的关键基因和途径.
纳米的应用以评估其保护作用.

主要成果:

野生大米 (HY) 与对照大米 (MX) 相比,对纳米塑料的损害明显较小,增长和叶绿素的减少.
与纳米塑料压力下的MX相比,HY表现出增强的红素沉积,更完整的细胞结构和更强的抗氧化防御.
在纳米塑料压力下的HY和MX中,纳米的应用改善了植物生长和细胞完整性.
转录组分析显示HY中的差异性基因表达与压力信号,防御,细胞壁合成 (素,纤维素) 和基生物合成有关.

结论:

野生大米 (HY) 对纳米塑料具有优越的耐受性,这可能是由于细胞壁成分如素和纤维素的增强合成,由特定的基因 (例如,OsCesA,Os4CL3) 调节.
纳米可以有效地改善植物中纳米塑料诱导的压力.
这项研究提供了对抗纳米塑料的植物防御机制的见解,并强调野生大米是开发农业中抗击塑料污染策略的有价值模型.

关键词:

红素含量粉和糖代谢转录分析

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