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Kehr J. Systemic regulation of mineral homeostasis by micro RNAs. Front Plant Sci. 2013;4:145doi: 10.3389/fpls.2013.00145.
Kehr, J. (2013). Systemic regulation of mineral homeostasis by micro RNAs. Frontiers in plant science, 4145. https://doi.org/10.3389/fpls.2013.00145
Kehr, Julia. "Systemic regulation of mineral homeostasis by micro RNAs." Frontiers in plant science vol. 4 (2013): 145. doi: https://doi.org/10.3389/fpls.2013.00145
Kehr J. Systemic regulation of mineral homeostasis by micro RNAs. Front Plant Sci. 2013 May 16;4:145. doi: 10.3389/fpls.2013.00145. eCollection 2013. PMID: 23720667; PMCID: PMC3655319.
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Front Plant Sci. 2013 May 16;4:145. doi: 10.3389/fpls.2013.00145. eCollection 2013.

Systemic regulation of mineral homeostasis by micro RNAs.

Frontiers in plant science

Julia Kehr

Affiliations

  1. Department of Molecular Plant Genetics, University of Hamburg Hamburg, Germany.

PMID: 23720667 PMCID: PMC3655319 DOI: 10.3389/fpls.2013.00145

Abstract

Plants frequently have to cope with environments with sub-optimal mineral nutrient availability. Therefore they need to constantly sense changes of ion concentrations in their environment. Nutrient availabilities and needs have to be tightly coordinated between organs to ensure a balance between uptake and demand for metabolism, growth, reproduction, and defense reactions. To this end information about the nutrient status has to flow from cell-to-cell, but also between distant organs via the long-distance transport tubes to trigger adaptive responses. This systemic signaling between roots and shoots is required to maintain mineral nutrient homeostasis in the different organs under varying environmental conditions. Recent results begin to shed light on the molecular components of the complex long-distance signaling pathways and it has been proposed that systemic signals can be transported through the xylem as well as via the phloem. Several molecules, including nutrients, hormones, sugars, and small RNAs have been suggested to be involved in systemic communication over long distance (Liu et al., 2009). Recent research has shown that in the case of mineral nutrients, the nutrients themselves, but also macromolecules like micro RNAs (miRNAs) can act as important information transmitters. The following review will summarize the current knowledge about phloem-mediated systemic signaling by miRNAs during ion nutrient allocation and adaptation to mineral nutrient deprivation, concentrating on the well-analyzed responses to a lack of potassium, sulfur, and copper.

Keywords: homeostasis; long-distance; nutrient; phloem; signaling; systemic; transport

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