Sclerotinia sclerotiorum Infection Triggers Changes in Primary and Secondary Metabolism in Arabidopsis thaliana

Author:

Chen J.1,Ullah C.1,Giddings Vassão D.1,Reichelt M.1,Gershenzon J.1,Hammerbacher A.2ORCID

Affiliation:

1. Department of Biochemistry, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany

2. Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0028, South Africa

Abstract

Sclerotinia sclerotiorum is a devastating plant pathogen that causes substantial losses in various agricultural crops. Although plants have developed some well-known defense mechanisms against invasive fungi, much remains to be learned about plant responses to fungal pathogens. In this study, we investigated how S. sclerotiorum infection affects plant primary and secondary metabolism in the model plant Arabidopsis thaliana. Our results showed that soluble sugar and amino acid content changed significantly in A. thaliana leaves upon fungal colonization, with a decrease in sucrose and an increase in mannitol, attributed to fungal biosynthesis. Furthermore, the jasmonate signaling pathway was rapidly activated by S. sclerotiorum infection, and there was a striking accumulation of antifungal metabolites such as camalexin, p-coumaroyl agmatine, feruloyl agmatine, and Nδ-acetylornithine. On the other hand, the characteristic defense compounds of the Brassicaceae, the glucosinolates, were not induced in A. thaliana infected by S. sclerotiorum. Our study provides a better understanding of how A. thaliana primary and secondary metabolism is modified during infection by a fungal pathogen like S. sclerotiorum that has both hemibiotrophic and necrotrophic stages.

Publisher

Scientific Societies

Subject

Plant Science,Agronomy and Crop Science

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