ArticlePlant physiology2010
Arsenic speciation in phloem and xylem exudates of castor bean.
Article in Plant physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.
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Who cites it
26 citing papers in PubMed, 122 citations in OpenAlex.
- Review
- Negative Impacts of Arsenic on Plants and Mitigation Strategies.Plants (Basel, Switzerland) · 2023Review
- Zinc oxide nanoparticles alleviate the arsenic toxicity and decrease the accumulation of arsenic in rice (Oryza sativa L.).BMC plant biology · 2021Article
- Effect of arsenic stress on 5-methylcytosine, photosynthetic parameters and nutrient content in arsenic hyperaccumulator Pteris cretica (L.) var. Albo-lineata.BMC plant biology · 2020Article
- Arsenic content in two-year-old Acer platanoides L. and Tilia cordata Miller seedlings growing under dimethylarsinic acid exposure-model experiment.Environmental science and pollution research international · 2019Article
- Article
- Changes in the Elemental and Metabolite Profile of Wheat Phloem Sap during Grain Filling Indicate a Dynamic between Plant Maturity and Time of Day.Metabolites · 2018Article
- Arsenic forms in phytoextraction of this metalloid in organs of 2-year-old Acer platanoides seedlings.Environmental science and pollution research international · 2018Article
- Two facets of world arsenic problem solution: crop poisoning restriction and enforcement of phytoremediation.Planta · 2018Review
- Comparative transcriptome combined with morpho-physiological analyses revealed key factors for differential cadmium accumulation in two contrasting sweet sorghum genotypes.Plant biotechnology journal · 2018Article
- Arsenic Uptake, Toxicity, Detoxification, and Speciation in Plants: Physiological, Biochemical, and Molecular Aspects.International journal of environmental research and public health · 2018Review
- Genomics of Metal Stress-Mediated Signalling and Plant Adaptive Responses in Reference to Phytohormones.Current genomics · 2017Review
- Arsenic methylation by a genetically engineeredPlant and soil · 2017Article
- Accumulation and transformation of inorganic and organic arsenic in rice and role of thiol-complexation to restrict their translocation to shoot.Scientific reports · 2017Article
- The Journey of Arsenic from Soil to Grain in Rice.Frontiers in plant science · 2017Review
- Arsenic Methylation in Arabidopsis thaliana Expressing an Algal Arsenite Methyltransferase Gene Increases Arsenic Phytotoxicity.Journal of agricultural and food chemistry · 2016Article
- The role of nodes in arsenic storage and distribution in rice.Journal of experimental botany · 2015Article
- Genome-wide association mapping identifies a new arsenate reductase enzyme critical for limiting arsenic accumulation in plants.PLoS biology · 2014Article
- Earth Abides Arsenic Biotransformations.Annual review of earth and planetary sciences · 2014Article
- Moving toward a precise nutrition: preferential loading of seeds with essential nutrients over non-essential toxic elements.Frontiers in plant science · 2014Review
Corrections and comments
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Authors and funding
8 authors at 3 institutions in 2 countries.
Funding
Abstract
How arsenic (As) is transported in phloem remains unknown. To help answer this question, we quantified the chemical species of As in phloem and xylem exudates of castor bean (Ricinus communis) exposed to arsenate [As(V)], arsenite [As(III)], monomethylarsonic acid [MMA(V)], or dimethylarsinic acid. In the As(V)- and As(III)-exposed plants, As(V) was the main species in xylem exudate (55%-83%) whereas As(III) predominated in phloem exudate (70%-94%). The ratio of As concentrations in phloem to xylem exudate varied from 0.7 to 3.9. Analyses of phloem exudate using high-resolution inductively coupled plasma-mass spectrometry and accurate mass electrospray mass spectrometry coupled to high-performance liquid chromatography identified high concentrations of reduced and oxidized glutathione and some oxidized phytochelatin, but no As(III)-thiol complexes. It is thought that As(III)-thiol complexes would not be stable in the alkaline conditions of phloem sap. Small concentrations of oxidized glutathione and oxidized phytochelatin were found in xylem exudate, where there was also no evidence of As(III)-thiol complexes. MMA(V) was partially reduced to MMA(III) in roots, but only MMA(V) was found in xylem and phloem exudate. Despite the smallest uptake among the four As species supplied to plants, dimethylarsinic acid was most efficiently transported in both xylem and phloem, and its phloem concentration was 3.2 times that in xylem. Our results show that free inorganic As, mainly As(III), was transported in the phloem of castor bean exposed to either As(V) or As(III), and that methylated As species were more mobile than inorganic As in the phloem.
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Registered trials
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