Scholarlink

Background <p>Plastic pollution, particularly microplastics (MPs), is a growing ecological concern. In agroecosystems, plastic mulches enhance crop production but, alter nutrient cycles, affect soil structure and aeration, and may disrupt to soil-plant interactions and human health.</p> Aim <p>The research, through a multifaceted and ecological approach, aimed to investigate: <i>i)</i> the interaction between microplastics and element translocation from soil to plants; <i>ii)</i> plant morphological, biochemical, and physiological responses to MPs-contaminated soils; <i>iii)</i> differential effects of conventional (PE) and biodegradable (BPs) MPs on soil and plants.</p> Methods <p>Lettuce was grown in soils amended with 1% and 2% PE or BPs. At harvest, soil properties, nutrient status, heavy metals concentrations were analysed. Plant biometry, photosynthesis, bioaccumulation, translocation, and metal transporter gene expression were evaluated. Untreated soils served as controls.</p> Results <p>The addition of 2% of PE and BP significantly (<i>p</i> &lt; 0.001) reduced soil nutrients: nitrate (−7.5%; −15.5%), nitrite (−65.4%; −46.5%), and sulphate (−13.9%; −31%, respectively). In 2%BPs treated-leaves, Zn (−96%), K (−39%), and Mg (−33%) significantly (<i>p</i> &lt; 0.001) decreased as well as in plant growth (−67%) and photosynthesis (−24%) were reduced. Metal-transporter expression was significantly (<i>p</i> &lt; 0.05) upregulated in 2%PE-treated roots (NRAMP5:+21.4, ZIP:+7.74, IRT1:+2.21, HMA3:+2.64) and leaves (IRT1:+3.2-fold), and 2%BPs-treated roots showed NRAMP5 (+18.2), ZIP (+5.81), and IRT1 (+2.13) upregulation.</p> Conclusion <p>BPs constrained plant growth and both MPs types triggered a molecular response. MPs’ presence in soils can be considered a stressor for plants as the consequent changes in element availability in soils caused alterations of bioaccumulation and translocation indices and upregulation of metal transporter genes.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The hidden constrains in soil ecology and plant physiology: microplastic effects on nutrient and metal transport in soil-plant continuum

  • 期刊论文

  • 发表日期：

    2025年7月23日

查看全文
  • Simone Landi,
  • Giorgia Santini,
  • Noemi Russo,
  • Lucia Santorufo,
  • Karen Power,
  • Luigi Rosati,
  • Antonietta Siciliano,
  • Alessandra Marano,
  • Carmen Arena,
  • Sergio Esposito,
  • Giulia Maisto

摘要

Background

Plastic pollution, particularly microplastics (MPs), is a growing ecological concern. In agroecosystems, plastic mulches enhance crop production but, alter nutrient cycles, affect soil structure and aeration, and may disrupt to soil-plant interactions and human health.

Aim

The research, through a multifaceted and ecological approach, aimed to investigate: i) the interaction between microplastics and element translocation from soil to plants; ii) plant morphological, biochemical, and physiological responses to MPs-contaminated soils; iii) differential effects of conventional (PE) and biodegradable (BPs) MPs on soil and plants.

Methods

Lettuce was grown in soils amended with 1% and 2% PE or BPs. At harvest, soil properties, nutrient status, heavy metals concentrations were analysed. Plant biometry, photosynthesis, bioaccumulation, translocation, and metal transporter gene expression were evaluated. Untreated soils served as controls.

Results

The addition of 2% of PE and BP significantly (p < 0.001) reduced soil nutrients: nitrate (−7.5%; −15.5%), nitrite (−65.4%; −46.5%), and sulphate (−13.9%; −31%, respectively). In 2%BPs treated-leaves, Zn (−96%), K (−39%), and Mg (−33%) significantly (p < 0.001) decreased as well as in plant growth (−67%) and photosynthesis (−24%) were reduced. Metal-transporter expression was significantly (p < 0.05) upregulated in 2%PE-treated roots (NRAMP5:+21.4, ZIP:+7.74, IRT1:+2.21, HMA3:+2.64) and leaves (IRT1:+3.2-fold), and 2%BPs-treated roots showed NRAMP5 (+18.2), ZIP (+5.81), and IRT1 (+2.13) upregulation.

Conclusion

BPs constrained plant growth and both MPs types triggered a molecular response. MPs’ presence in soils can be considered a stressor for plants as the consequent changes in element availability in soils caused alterations of bioaccumulation and translocation indices and upregulation of metal transporter genes.