未被识别的亚微米塑料进入作物根的入口途径:保护层中的孔裂
Luya Wang1, Beibei Liu2, Wen Zhang3
1Environmental and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China; Key Laboratory of Low-carbon Green Agriculture in Tropical region of China, Ministry of Agriculture and Rural Affairs, Haikou 571101, PR China.
Journal of hazardous materials
|June 9, 2023
概括
亚微米塑料颗粒通过诱导细胞变形和细胞间隙,突破了玉米的根障碍. 的存在进一步促进了这种进入,给农业粮食安全带来了风险.
科学领域:
- 环境科学 环境科学
- 植物生物学 植物生物学
- 毒理学 毒理学 毒理学
背景情况:
- 土壤中塑料颗粒的积累是一个日益严重的全球性问题,影响食品安全.
- 塑料颗粒通过作物根的外部障碍物透的机制尚不清楚.
研究的目的:
- 阐明亚微米塑料颗粒穿越玉米根外部生物屏障的途径和机制.
- 研究氧化应激和在塑料颗粒进入植物根中的作用.
主要方法:
- 显微镜和细胞成像技术用于观察粒子-根相互作用.
- 细胞变形和细胞间空间变化的量化.
- 在根组织中评估氧化应激标志物.
主要成果:
- 观察到微米以下的聚乙烯颗粒通过利用表皮细胞之间的间隙穿过玉米根障碍物.
- 塑料颗粒通过增强的氧化应激诱导了顶部表皮细胞的圆化 (15.5%的圆度增加).
- 发现的存在促进了这些入口"洞"的形成.
结论:
- 塑料颗粒可以通过诱导细胞变形和细胞间空间扩张来突破作物根壁垒.
- 氧化应激是塑料颗粒诱导的根细胞变化的关键因素.
- 这些发现突显了农业系统和粮食安全中塑料颗粒污染的风险.
相关概念视频
02:34Water and Mineral Acquisition
33.3K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
33.3K
01:46The Apoplast and Symplast
50.8K
Plant growth depends on its ability to take up water and dissolved minerals from the soil. The root system of every plant is equipped with the necessary tissues to facilitate the entry of water and solutes. The plant tissues involved in the transport of water and minerals have two major compartments - the apoplast and the symplast. The apoplast includes everything outside the plasma membrane of living cells and consists of cell walls, extracellular spaces, xylem, phloem, and tracheids. The...
50.8K