ArticleRice (New York, N.Y.)2016
Kinetic Analysis of Zinc/Cadmium Reciprocal Competitions Suggests a Possible Zn-Insensitive Pathway for Root-to-Shoot Cadmium Translocation in Rice.
Article in Rice (New York, N.Y.), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed, 92 citations in OpenAlex.
- Transporter promiscuity and redox-driven metal partitioning in plant responses to chemically analogous metals.Plant cell reports · 2026Review
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- Effects of Malic Acid on Cadmium Uptake and Translocation and Essential Element Accumulation in Rice.Toxics · 2025Article
- Spraying Zinc Sulfate to Reveal the Mechanism through the Glutathione Metabolic Pathway Regulates the Cadmium Tolerance of Seashore Paspalum (Plants (Basel, Switzerland) · 2023Article
- New evidence of arsenic translocation and accumulation in Pteris vittata from real-time imaging using positron-emittingScientific reports · 2021Article
- Article
- Analysis of Cadmium Root Retention for Two Contrasting Rice Accessions Suggests an Important Role forPlants (Basel, Switzerland) · 2021Article
- Cadmium isotope fractionation in the soil - cacao systems of Ecuador: a pilot field study.RSC advances · 2019Article
- Real-time whole-plant dynamics of heavy metal transport inPlant direct · 2019Article
- Bioinformatic Exploration of the Targets of Xylem Sap miRNAs in Maize under Cadmium Stress.International journal of molecular sciences · 2019Article
- Cadmium accumulation characteristics of low-cadmium rice (Oryza sativa L.) line and FEnvironmental science and pollution research international · 2017Article
- Cadmium adsorption, chelation and compartmentalization limit root-to-shoot translocation of cadmium in rice (Oryza sativa L.).Environmental science and pollution research international · 2017Article
- The Sulfate Supply Maximizing Arabidopsis Shoot Growth Is Higher under Long- than Short-Term Exposure to Cadmium.Frontiers in plant science · 2017Article
- Visualization of zinc dynamics in intact plants using positron imaging of commercially availablePlant methods · 2017Article
- Review
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Authors and funding
12 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundAmong cereals, rice has a genetic propensity to accumulate high levels of cadmium (Cd) in grains. Xylem-mediated root-to-shoot translocation rather than root uptake has been suggested as the main physiological factor accounting for the genotypic variation observed in Cd accumulation in shoots and grains. Several evidence indicate OsHMA2 - a putative zinc (Zn) transporter - as the main candidate protein that could be involved in mediating Cd- and Zn-xylem loading in rice. However, the specific interactions between Zn and Cd in rice often appear anomalous if compared to those observed in other staple crops, suggesting that root-to-shoot Cd translocation process could be more complex than previously thought. In this study we performed a complete set of competition experiments with Zn and Cd in order to analyze their possible interactions and reciprocal effects at the root-to-shoot translocation level.
resultsThe competition analysis revealed the lack of a full reciprocity when considering the effect of Cd on Zn accumulation, and vice versa, since the accumulation of Zn in the shoots was progressively inhibited by Cd increases, whereas that of Cd was only partially impaired by Zn. Such behaviors were probably dependent on Cd-xylem loading mechanisms, as suggested by: i) the analysis of Zn and Cd content in the xylem sap performed in relation to the concentration of the two metals in the mobile fractions of the roots; ii) the analysis of the systemic movement of (107)Cd in short term experiments performed using a positron-emitting tracer imaging system (PETIS).
conclusionsOur results suggest that at least two pathways may mediate root-to-shoot Cd translocation in rice. The former could involve OsHMA2 as Zn(2+)/Cd(2+) xylem loader, whereas the latter appears to involve a Zn-insensitive system that still needs to be identified.
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