Annals of Botany

Resistance responses triggered by Fusarium crown rot in wheat

Fusarium diseases of cereals constitute economically significant constraints in cereal production systems. In this study, transcriptomic analysis using RNA-seq is combined with metabolite analysis to provide novel insights into the interaction between bread wheat and Fusarium pseudograminearum, the predominant causal agent of Fusarium crown rot.

Molecular inference for induction of phenylalanine, tryptamine and tyrosine pathways that lead to the production of defence-associated hormones and metabolites in wheat following F. pseudograminearum infection in wheat
Molecular inference for induction of phenylalanine, tryptamine and tyrosine pathways that lead to the production of defence-associated hormones and metabolites in wheat following F. pseudograminearum infection in wheat. The phenylalanine, tyrosine and tryptophan biosynthesis pathway (retrieved from KEGG) denoting Fusarium responsive genes encoding enzymes functioning within the pathway. Filled arrows denote up-regulated genes and open arrows denote down-regulated genes. Underlined compound names indicate metabolites which were detected in this study using LC-MS.

Powell et al. show that wheat responds to infection by producing a barrage of secondary metabolites involved in plant defence and enzymes that may function in detoxifying Fusarium virulence factors such as deoxynivalenol. The discoveries presented here will aid future efforts to improve resistance in cereals against Fusarium pathogens.

This paper is part of the Annals of Botany Special Issue on Plant Immunity. It will be free access till June 2017 and after April 2018.

Reference

Powell, J. J., Carere, J., Fitzgerald, T. L., Stiller, J., Covarelli, L., Xu, Q., … Kazan, K. (2016). The Fusarium crown rot pathogen Fusarium pseudograminearum triggers a suite of transcriptional and metabolic changes in bread wheat (Triticum aestivum L.) . Annals of Botany, mcw207. https://doi.org/10.1093/aob/mcw207