Facilitation of Fusarium graminearum Infection by 9-Lipoxygenases in Arabidopsis and Wheat

• DOI: 10.1094/mpmi-04-15-0096-r
• Publication Date: 2015-06-15T13:14:50Z
• Authors: Vamsi J. Nalam; Syeda Alam; Jantana Keereetaweep; Barney Venables; Dehlia Burdan; Hyeonju Lee; Harold N. Trick; Sujon Sarowar; Ragiba Makandar; Jyoti Shah
• Keywords: Jasmonic acid

Fusarium graminearum causes head blight, an important disease of wheat. F. can also cause in Arabidopsis thaliana. Here, we show that the LOX1 and LOX5 genes, which encode 9-lipoxygenases (9-LOXs), are targeted during this interaction to facilitate infection. expression were upregulated graminearum-inoculated plants loss or function resulted enhanced resistance corresponding mutant plants. The infection lox1 lox5 mutants was accompanied by more robust induction salicylic acid (SA) accumulation signaling attenuation jasmonic (JA) response lox1- lox5-conferred diminished expressing SA-degrading salicylate hydroxylase application methyl-JA. Results presented here suggest plant 9-LOXs engaged control balance between SA JA Furthermore, since silencing TaLpx-1 encoding a 9-LOX with homology LOX5, against wheat, have conserved role as susceptibility factors caused fungus