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Abstract

Functions of exogenous L-ascorbic acid in plant roots are poorly understood. Recent study by Makavitskaya et al. (doi.org/10.1093/jxb/ery056) has demonstrated that exogenous ascorbate can be released from roots in response to salt stress, and can trigger elevation in the cytosolic free Ca2+. Here, we report that exogenous ascorbate significantly modifies root elongation in Arabidopsis thaliana. Using a medium exchange technique, we have shown that 10-100 µM ascorbate induces small but significant increase in root elongation while higher levels cause its dramatic decrease. Root border cells of Pisum sativum have been losing viability twice faster in the presence of ascorbate that under control conditions, as tested by the confocal microscopy and a combined staining with propidium iodide and fluorescein diacetate.

Item Type:	Article
Authors/Creators:	Li, X and Makavitskaya, M and Samokhina, V and Mackievic, V and Navaselsky, I and Hryvusevich, P and Smolikova, G and Medvedev, S and Shabala, S and Yu, M and Demidchik, V
Keywords:	ROS, Arabidopsis thaliana, ascorbic acid, root growth and development, reactive oxygen species, root border cells, calcium signalling
Journal or Publication Title:	Plant Signaling & Behavior
Publisher:	Taylor & Francis Inc
ISSN:	1559-2316
DOI / ID Number:	https://doi.org/10.1080/15592324.2018.1514895
Copyright Information:	Copyright 2018 Taylor & Francis Group, LLC
Related URLs:	Google Scholar: Shabala, S UTAS Profile: Shabala, S
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