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Light as stress factor to plant roots – case of root halotropism

Despite growing underground, largely in darkness, roots emerge to be very sensitive to light. Recently, several important papers have been published which reveal that plant roots not only express all known light receptors but also that their growth, physiology and adaptive stress responses are light...

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Autores principales: Yokawa, Ken, Fasano, Rossella, Kagenishi, Tomoko, Baluška, František
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4264407/
https://www.ncbi.nlm.nih.gov/pubmed/25566292
http://dx.doi.org/10.3389/fpls.2014.00718
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author Yokawa, Ken
Fasano, Rossella
Kagenishi, Tomoko
Baluška, František
author_facet Yokawa, Ken
Fasano, Rossella
Kagenishi, Tomoko
Baluška, František
author_sort Yokawa, Ken
collection PubMed
description Despite growing underground, largely in darkness, roots emerge to be very sensitive to light. Recently, several important papers have been published which reveal that plant roots not only express all known light receptors but also that their growth, physiology and adaptive stress responses are light-sensitive. In Arabidopsis, illumination of roots speeds-up root growth via reactive oxygen species-mediated and F-actin dependent process. On the other hand, keeping Arabidopsis roots in darkness alters F-actin distribution, polar localization of PIN proteins as well as polar transport of auxin. Several signaling components activated by phytohormones are overlapping with light-related signaling cascade. We demonstrated that the sensitivity of roots to salinity is altered in the light-grown Arabidopsis roots. Particularly, light-exposed roots are less effective in their salt-avoidance behavior known as root halotropism. Here we discuss these new aspects of light-mediated root behavior from cellular, physiological and evolutionary perspectives.
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spelling pubmed-42644072015-01-06 Light as stress factor to plant roots – case of root halotropism Yokawa, Ken Fasano, Rossella Kagenishi, Tomoko Baluška, František Front Plant Sci Plant Science Despite growing underground, largely in darkness, roots emerge to be very sensitive to light. Recently, several important papers have been published which reveal that plant roots not only express all known light receptors but also that their growth, physiology and adaptive stress responses are light-sensitive. In Arabidopsis, illumination of roots speeds-up root growth via reactive oxygen species-mediated and F-actin dependent process. On the other hand, keeping Arabidopsis roots in darkness alters F-actin distribution, polar localization of PIN proteins as well as polar transport of auxin. Several signaling components activated by phytohormones are overlapping with light-related signaling cascade. We demonstrated that the sensitivity of roots to salinity is altered in the light-grown Arabidopsis roots. Particularly, light-exposed roots are less effective in their salt-avoidance behavior known as root halotropism. Here we discuss these new aspects of light-mediated root behavior from cellular, physiological and evolutionary perspectives. Frontiers Media S.A. 2014-12-12 /pmc/articles/PMC4264407/ /pubmed/25566292 http://dx.doi.org/10.3389/fpls.2014.00718 Text en Copyright © 2014 Yokawa, Fasano, Kagenishi and Baluška. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Yokawa, Ken
Fasano, Rossella
Kagenishi, Tomoko
Baluška, František
Light as stress factor to plant roots – case of root halotropism
title Light as stress factor to plant roots – case of root halotropism
title_full Light as stress factor to plant roots – case of root halotropism
title_fullStr Light as stress factor to plant roots – case of root halotropism
title_full_unstemmed Light as stress factor to plant roots – case of root halotropism
title_short Light as stress factor to plant roots – case of root halotropism
title_sort light as stress factor to plant roots – case of root halotropism
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4264407/
https://www.ncbi.nlm.nih.gov/pubmed/25566292
http://dx.doi.org/10.3389/fpls.2014.00718
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