ArticlePlant physiology2005
The regulation of anion loading to the maize root xylem.
Article in Plant physiology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.
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Who cites it
25 citing papers in PubMed.
- Expression of the grapevine anion transporter ALMT2 in Arabidopsis roots decreases the shoot Cl-/NO3- ratio under salt stress.Journal of experimental botany · 2025Article
- Transcriptome and Physiological Analysis Reveals the Mechanism of Abscisic Acid in Regulating Cadmium Uptake and Accumulation in the HyperaccumulatorPlants (Basel, Switzerland) · 2025Article
- Micronutrient Biofortification in Wheat: QTLs, Candidate Genes and Molecular Mechanism.International journal of molecular sciences · 2025Review
- Chloride transport and homeostasis in plants.Quantitative plant biology · 2025Review
- Ion Changes and Signaling under Salt Stress in Wheat and Other Important Crops.Plants (Basel, Switzerland) · 2023Review
- Selenium Uptake, Transport, Metabolism, Reutilization, and Biofortification in Rice.Rice (New York, N.Y.) · 2022Review
- Exogenous abscisic acid (ABA) promotes cadmium (Cd) accumulation in Sedum alfredii Hance by regulating the expression of Cd stress response genes.Environmental science and pollution research international · 2020Article
- Combined Allosteric Responses Explain the Bifurcation in Non-Linear Dynamics ofFrontiers in plant science · 2020Article
- Chloride as a Beneficial Macronutrient in Higher Plants: New Roles and Regulation.International journal of molecular sciences · 2019Review
- Identification of Novel Inhibitors of Auxin-Induced CaPlant physiology · 2019Article
- Coping With Water Shortage: An Update on the Role of KFrontiers in plant science · 2019Review
- Plant Growth Promoting Rhizobacteria in Amelioration of Salinity Stress: A Systems Biology Perspective.Frontiers in plant science · 2017Review
- Vacuolar Chloride Fluxes Impact Ion Content and Distribution during Early Salinity Stress.Plant physiology · 2016Article
- SLAH1, a homologue of the slow type anion channel SLAC1, modulates shoot Cl- accumulation and salt tolerance in Arabidopsis thaliana.Journal of experimental botany · 2016Article
- Identification of a Stelar-Localized Transport Protein That Facilitates Root-to-Shoot Transfer of Chloride in Arabidopsis.Plant physiology · 2016Article
- Anion Channel Inhibitor NPPB-Inhibited Fluoride Accumulation in Tea Plant (Camellia sinensis) Is Related to the Regulation of Ca²⁺, CaM and Depolarization of Plasma Membrane Potential.International journal of molecular sciences · 2016Article
- Article
- Grapevine and Arabidopsis Cation-Chloride Cotransporters Localize to the Golgi and Trans-Golgi Network and Indirectly Influence Long-Distance Ion Transport and Plant Salt Tolerance.Plant physiology · 2015Article
- Breaking conceptual locks in modelling root absorption of nutrients: reopening the thermodynamic viewpoint of ion transport across the root.Annals of botany · 2014Review
- Shoot chloride exclusion and salt tolerance in grapevine is associated with differential ion transporter expression in roots.BMC plant biology · 2014Article
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The regulation of anion loading to the shoot in maize (Zea mays) was investigated via an electrophysiological characterization of ion conductances in protoplasts isolated from the root stele. Two distinct anion conductances were identified. In protoplasts from well-watered plants, Z. mays xylem-parenchyma quickly-activating anion conductance (Zm-X-QUAC) was the most prevalent conductance and is likely to load the majority of NO(3)(-) and Cl(-) ions to the xylem in nonstressed conditions. Z. mays xylem-parenchyma inwardly-rectifying anion conductance was found at a lower frequency in protoplasts from well-watered plants than Zm-X-QUAC, was much smaller in magnitude in all observed conditions, and is unlikely to be such a major pathway for anion loading into the xylem. Activity of Z. mays xylem-parenchyma inwardly-rectifying anion conductance increased following a water stress prior to protoplast isolation, but the activity of the putative major anion-loading pathway, Zm-X-QUAC, decreased. Addition of abscisic acid (ABA) to protoplasts from well-watered plants also inhibited Zm-X-QUAC activity within minutes, as did a high free Ca(2+)concentration in the pipette. ABA was also seen to activate a Ca(2+)-permeable conductance (Z. mays xylem-parenchyma hyperpolarization activated cation conductance) in protoplasts from well-watered plants. It is postulated that the inhibition of anion loading into the xylem (an important response to a water stress) due to down-regulation of Zm-X-QUAC activity is mediated by an ABA-mediated rise in free cytosolic Ca(2+).
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