Role of phytohormones in aluminium rhizotoxicity

Kopittke, Peter M. (2016) Role of phytohormones in aluminium rhizotoxicity. Plant Cell and Environment, 39 10: 2319-2328. doi:10.1111/pce.12786

Author Kopittke, Peter M.
Title Role of phytohormones in aluminium rhizotoxicity
Journal name Plant Cell and Environment   Check publisher's open access policy
ISSN 1365-3040
Publication date 2016-10-01
Year available 2016
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1111/pce.12786
Open Access Status Not yet assessed
Volume 39
Issue 10
Start page 2319
End page 2328
Total pages 10
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Subject 1314 Physiology
1110 Plant Science
Abstract Elevated concentrations of soluble aluminium (Al) reduce root growth in acid soils, but much remains unknown regarding the toxicity of this Al as well as the mechanisms by which plants respond. This review examines changes in phytohormones in Al-stressed plants. Al often results in a rapid ‘burst’ of ethylene in root apical tissues within 15–30 min, with this regulating an increase in auxin. This production of ethylene and auxin seems to be a component of a plant-response to toxic Al, resulting in cell wall modification or regulation of organic acid release. There is also evidence of a role of auxin in the expression of Al toxicity itself, with Al decreasing basipetal transport of auxin, thereby potentially decreasing wall loosening as required for elongation. Increasingly, changes in abscisic acid in root apices also seem to be involved in plant-responses to toxic Al. Changes in cytokinins, gibberellins and jasmonates following exposure to Al are also examined, although little information is available. Finally, although not a phytohormone, concentrations of nitric oxide change rapidly in Al-exposed tissues. The information presented in this review will assist in focusing future research efforts in examining the importance of phytohormones in plant tissues exposed to toxic levels of Al.
Keyword Nitric-Oxide Production
Wheat Triticum-Aestivum
Root Elongation
Induced Inhibition
Auxin Biosynthesis
Transition Zone
Hypocotyl Elongation
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID FT120100277
Institutional Status UQ

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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