Dataset Information

Potassium (K+) gradients serve as a mobile energy source in plant vascular tissues.

ABSTRACT: The essential mineral nutrient potassium (K(+)) is the most important inorganic cation for plants and is recognized as a limiting factor for crop yield and quality. Nonetheless, it is only partially understood how K(+) contributes to plant productivity. K(+) is used as a major active solute to maintain turgor and to drive irreversible and reversible changes in cell volume. K(+) also plays an important role in numerous metabolic processes, for example, by serving as an essential cofactor of enzymes. Here, we provide evidence for an additional, previously unrecognized role of K(+) in plant growth. By combining diverse experimental approaches with computational cell simulation, we show that K(+) circulating in the phloem serves as a decentralized energy storage that can be used to overcome local energy limitations. Posttranslational modification of the phloem-expressed Arabidopsis K(+) channel AKT2 taps this "potassium battery," which then efficiently assists the plasma membrane H(+)-ATPase in energizing the transmembrane phloem (re)loading processes.

SUBMITTER: Gajdanowicz P

PROVIDER: S-EPMC3021027 | biostudies-literature | 2011 Jan

REPOSITORIES: biostudies-literature

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Potassium (K+) gradients serve as a mobile energy source in plant vascular tissues.

Gajdanowicz Pawel P Michard Erwan E Sandmann Michael M Rocha Marcio M Corrêa Luiz Gustavo Guedes LG Ramírez-Aguilar Santiago J SJ Gomez-Porras Judith L JL González Wendy W Thibaud Jean-Baptiste JB van Dongen Joost T JT Dreyer Ingo I

Proceedings of the National Academy of Sciences of the United States of America 20101227 2

The essential mineral nutrient potassium (K(+)) is the most important inorganic cation for plants and is recognized as a limiting factor for crop yield and quality. Nonetheless, it is only partially understood how K(+) contributes to plant productivity. K(+) is used as a major active solute to maintain turgor and to drive irreversible and reversible changes in cell volume. K(+) also plays an important role in numerous metabolic processes, for example, by serving as an essential cofactor of enzym ...[more]

PMID: 21187374

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Project description:BackgroundCombined heat and power generation (CHP generation, also called 'cogeneration') is attracting public attention for its high thermal efficiency, without considering possible adverse environmental health effects.This study investigated the potential role of cogeneration plants in inducing 3 environmental diseases: asthma, allergic rhinitis, and atopic dermatitis.MethodsFrom 1 January 2013 to 31 December 2017, the towns (dongs) of South Korea in which a cogeneration plant started operation were selected as study sites. For comparison, a matched control dong with the most similar Gross Regional Domestic Product for each case dong was selected. The numbers of outpatient visits, inpatient admissions, and emergency visits provided by the National Health Insurance Sharing Service (NHISS) were analyzed using an interrupted time-series design. For air pollutants, the concentrations of 5 air pollutants from the AIRKOREA dataset were used.ResultsA total of 6 cogeneration plants in 6 case dongs started operation during the study period. For overall case dongs, the pre-CHP trend was 1.04 (95% confidence interval [CI]: 1.038-1.042), and the post-CHP trend was 1.248 (95% CI: 1.244-1.253). The intercept change due to the CHP plant was 1.15 (95% CI: 1.137-1.162). For overall control dongs, the pre-CHP trend was 1.133 (95% CI: 1.132-1.135), and the post-CHP trend was 1.065 (95% CI: 1.06-1.069). The intercept change due to the CHP plant was 0.888 (95% CI: 0.878-0.899). Only for CO and NO2, the relative risk (RR) for overall case dongs was statistically significantly increased, and the RR for the overall control dongs was statistically insignificant.ConclusionsPossible hazardous emissions, like CO and NO2, from cogeneration plants could induce environmental diseases in nearby community populations. The emissions from cogeneration plants should be investigated regularly by a governmental agency, and the long-term health outcomes of nearby community residents should be investigated.

Dataset Information

Potassium (K+) gradients serve as a mobile energy source in plant vascular tissues.

Publications

Potassium (K+) gradients serve as a mobile energy source in plant vascular tissues.

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