Potassium deficiency induces the biosynthesis of oxylipins and glucosinolates in Arabidopsis thaliana

BMC Plant Biology

Research Article

Tony R Larson¹  Ian A Graham¹  Alan Crozier²  Anna Amtmann²  William Mullen²  Stephanie Troufflard²  Patrick Armengaud³ 

[1] Centre for Novel Agricultural Products, Department of Biology, University of York, PO BOX 373, YO10, York, 5YW, UK;Faculty of Biomedical and Life Sciences, University of Glasgow, 8QQ, Glasgow, G12, UK;Faculty of Biomedical and Life Sciences, University of Glasgow, 8QQ, Glasgow, G12, UK;Institut Jean-Pierre Bourgin, UMR1318 INRA AgroParisTech, Centre de Versailles, RD10, 78026, Versailles Cedex, France;

关键词: Jasmonic Acid;    Herbivorous Insect;    OPDA;    Lateral Root Growth;    Wildtype Plant;   

DOI  :  10.1186/1471-2229-10-172

 received in 2009-11-06, accepted in 2010-08-11,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundMineral fertilization and pest control are essential and costly requirements for modern crop production. The two measures go hand in hand because plant mineral status affects plant susceptibility to pests and vice versa. Nutrient deficiency triggers specific responses in plants that optimize nutrient acquisition and reprogram metabolism. K-deficient plants illustrate these strategies by inducing high-affinity K-uptake and adjusting primary metabolism. Whether and how K deficient plants also alter their secondary metabolism for nutrient management and defense is not known.ResultsHere we show that K-deficient plants contain higher levels of the phytohormone jasmonic acid (JA), hydroxy-12-oxo-octadecadienoic acids (HODs) and 12-oxo-phytodienoic acid (OPDA) than K-sufficient plants. Up-regulation of the 13-LOX pathway in response to low K was evident in increased transcript levels of several biosynthetic enzymes. Indole and aliphatic glucosinolates accumulated in response to K-deficiency in a manner that was respectively dependent or independent on signaling through Coronatine-Insensitive 1 (COI1). Transcript and glucosinolate profiles of K-deficient plants resembled those of herbivore attacked plants.ConclusionsBased on our results we propose that under K-deficiency plants produce oxylipins and glucosinolates to enhance their defense potential against herbivorous insects and create reversible storage for excess S and N.

【 授权许可】

Unknown   
© Troufflard et al; licensee BioMed Central Ltd. 2010. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.