ArticlePloS one2015
Pb-induced avoidance-like chloroplast movements in fronds of Lemna trisulca L.
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 25 citations in OpenAlex.
- Age-Specific Physiological Adjustments ofPlants (Basel, Switzerland) · 2025Article
- Pb uptake, accumulation, and translocation in plants: Plant physiological, biochemical, and molecular response: A review.Heliyon · 2024Review
- Exogenous application of glutathione enhanced growth, nutritional orchestration and physiochemical characteristics ofPhysiology and molecular biology of plants : an international journal of functional plant biology · 2023Article
- Article
- Chloroplast avoidance movement: a novel paradigm of ROS signalling.Photosynthesis research · 2020Review
- Can Ceylon Leadwort (International journal of molecular sciences · 2020Article
- Reduced Glutathione Protects Subcellular Compartments From Pb-Induced ROS Injury in Leaves and Roots of Upland Cotton (Frontiers in plant science · 2020Article
- Integrated role of ROS and CaProtoplasma · 2016Article
- Chloroplast avoidance movement as a sensitive indicator of relative water content during leaf desiccation in the dark.Photosynthesis research · 2016Article
- Blue light-dependent changes in loosely bound calcium in Arabidopsis mesophyll cells: an X-ray microanalysis study.Journal of experimental botany · 2016Article
- Hydrogen Peroxide, Signaling in Disguise during Metal Phytotoxicity.Frontiers in plant science · 2016Review
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Authors and funding
7 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Lead ions are particularly dangerous to the photosynthetic apparatus, but little is known about the effects of trace metals, including Pb, on regulation of chloroplast redistribution. In this study a new effect of lead on chloroplast distribution patterns and movements was demonstrated in mesophyll cells of a small-sized aquatic angiosperm Lemna trisulca L. (star duckweed). An analysis of confocal microscopy images of L. trisulca fronds treated with lead (15 μM Pb2+, 24 h) in darkness or in weak white light revealed an enhanced accumulation of chloroplasts in the profile position along the anticlinal cell walls, in comparison to untreated plants. The rearrangement of chloroplasts in their response to lead ions in darkness was similar to the avoidance response of chloroplasts in plants treated with strong white light. Transmission electron microscopy X-ray microanalysis showed that intracellular chloroplast arrangement was independent of the location of Pb deposits, suggesting that lead causes redistribution of chloroplasts, which looks like a light-induced avoidance response, but is not a real avoidance response to the metal. Furthermore, a similar redistribution of chloroplasts in L. trisulca cells in darkness was observed also under the influence of exogenously applied hydrogen peroxide (H2O2). In addition, we detected an enhanced accumulation of endogenous H2O2 after treatment of plants with lead. Interestingly, H2O2-specific scavenger catalase partly abolished the Pb-induced chloroplast response. These results suggest that H2O2 can be involved in the avoidance-like movement of chloroplasts induced by lead. Analysis of photometric measurements revealed also strong inhibition (but not complete) of blue-light-induced chloroplast movements by lead. This inhibition may result from disturbances in the actin cytoskeleton, as we observed fragmentation and disappearance of actin filaments around chloroplasts. Results of this study show that the mechanisms of the toxic effect of lead on chloroplasts can include disturbances in their movement and distribution pattern.
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