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Regulation of Root Development and Architecture by Strigolactones under Optimal and Nutrient Deficiency Conditions

1
Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, 40-032 Katowice, Poland
2
Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), D-06466 Gatersleben, Germany
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2018, 19(7), 1887; https://doi.org/10.3390/ijms19071887
Received: 23 May 2018 / Revised: 19 June 2018 / Accepted: 24 June 2018 / Published: 27 June 2018
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Abstract

Strigolactones (SLs) constitute a group of plant hormones which are involved in multiple aspects of plant growth and development. Beside their role in shoot and root development and plant architecture in general, SLs are also involved in plant responses to nutrient deficiency by promoting interactions with symbiotic organisms and via promotion of root elongation. Recent observations on the cross talk between SLs and other hormones demonstrate that the inhibition of adventitious root formation by ethylene is independent of SLs. Additionally, it was shown that root exposure to SLs leads to the accumulation of secondary metabolites, such as flavonols or antioxidants. These data suggest pleiotropic effects of SLs, that influence root development. The discovery that the commonly used synthetic SL analogue racGR24 might also mimic the function of other plant growth regulators, such as karrikins, has led us to consider the previously published publications under the new aspects. This review summarizes present knowledge about the function of SLs in shaping root systems under optimal and nutrient deficiency conditions. Results which appear inconsistent with the various aspects of root development are singled out. View Full-Text
Keywords: nutrient stress; root development; strigolactones (SLs) nutrient stress; root development; strigolactones (SLs)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Marzec, M.; Melzer, M. Regulation of Root Development and Architecture by Strigolactones under Optimal and Nutrient Deficiency Conditions. Int. J. Mol. Sci. 2018, 19, 1887.

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