ArticleBMC plant biology2025
Characterization of Cd and As accumulation and subcellular distribution in different varieties of perennial ryegrasses.
Article in BMC plant biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Biofilm-FormingPlants (Basel, Switzerland) · 2026Article
- Adaptation of morphological traits and anatomy structure related to Cd spatial distribution in wild rice Oryza officinalis and Oryza rufipogon roots.BMC plant biology · 2026Article
- Enhanced Stem Immobilization Mitigates Leaf Cadmium Accumulation and Modifies PSII Photochemistry in a Tobacco Line with Low Cadmium Accumulation.Plants (Basel, Switzerland) · 2026Article
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7 authors.
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Abstract
backgroundThe distribution, accumulation, and toxicological effects of two perennial ryegrass (Lolium perenne L.) varieties under combined cadmium (Cd)-arsenic (As) stress are worth exploring. Two varieties, 'Nicaragua' (high-Cd/As-accumulating, DPB) and 'Venus' (low-Cd/As-accumulating, WNS), were selected as experimental materials for pot trials. Subcellular fractionation, ultrastructural changes, and key transporter proteins cation exchanger (CAX), heavy metal ATPase (HMA), natural resistance-associated macrophage protein (NRAMP), and phosphate transporter (PHT) were analyzed under combined Cd-As stress.
results(1) The translocation factors of perennial ryegrass for Cd and As were < 1. Cd and As were mainly distributed in the cell wall and the soluble fractions. The total percentage of Cd and As in the cell wall and the soluble fractions of DPB variety was 92.53 and 91.29%, respectively. (2) Cd and As stress on the cellular ultrastructure of two perennial ryegrasses resulted in plasmodesmata separation of leaf cells, swelling of chloroplasts, large numbers of osmiophilic granules, and thickening of root cell walls. Cell wall thickening was more pronounced in the low-accumulating variety. (3) The highest increase in HMA activity, which increased by 79.08% over the non-Cd/As treatment, was observed in the roots of DPB under Cd and As stress. Cd and As stress induced HMA activity (P < 0.01) in the highly accumulating variety DPB, and positively promoted Cd translocation and storage in the soluble fraction (vacuole).
conclusionsLow Cd accumulation variety mainly resisted heavy metal through bound more Cd and As to cell wall resulting in cell wall thicken. High-Cd accumulation variety DPB stored Cd and As in the soluble fraction (vacuole ), and enhanced activity of the transporter protein HMA. This study elucidates the relationship and role of key transporter proteins of high/low accumulating perennial ryegrass with cellular Cd/As detoxification modes such as cell wall barrier defence and vesicle compartmentalisation, and provides a theoretical basis for differential detoxification strategies for species with different accumulating characteristics.
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