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Type: Journal article
Title: H₂O₂ regulates root system architecture by modulating the polar transport and redistribution of auxin
Other Titles: H(2)O(2) regulates root system architecture by modulating the polar transport and redistribution of auxin
Author: Su, C.
Liu, L.
Liu, H.
Ferguson, B.
Zou, Y.
Zhao, Y.
Wang, T.
Wang, Y.
Li, X.
Citation: Journal of Plant Biology, 2016; 59(3):260-270
Publisher: Springer
Issue Date: 2016
ISSN: 1226-9239
Statement of
Chao Su, Liu Liu, Haipei Liu, Brett J. Ferguson, Yanmin Zou, Yankun Zhao, Tao Wang, Youning Wang, Xia Li
Abstract: The accumulation and redistribution of the plant hormone auxin plays a crucial role in root development and patterning. Plants can alter their root system architecture (RSA) to adapt to different biotic and abiotic stresses. In addition, reactive oxygen species (ROS), such as H₂O₂, are known to increase in plants undergoing stress. Here, we present evidence that H₂O₂ can regulate auxin accumulation and redistribution through modulating polar auxin transport, leading to changes in RSA. Plants exposed to different concentrations of H₂O₂ formed a highly branched root system with abundant lateral roots and a shorter primary root. Monitoring of the auxin responsive DR5::GUS indicated that auxin accumulation decreased in lateral root primordia (LRP) and emerging lateral root tips. In addition, polar auxin transport, including both basipetal and acropetal transport modulated by AUX1 and PIN protein carriers, was involved in the process. Taken together, our results suggest that H₂O₂ could regulate plastic RSA by perturbing polar auxin transport as a means of modulating the accumulation and distribution of auxin.
Keywords: Auxin; auxin redistribution H₂O₂; polar auxin transport; root system architecture
Rights: © Korean Society of Plant Biologists and Springer-Verlag Berlin Heidelberg 2016
DOI: 10.1007/s12374-016-0052-1
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