Relationship between the aggressiveness and catalase activity of Septoria nodorum Berk. in wheat
2013
Maksimov, I. V. | Yarullina, L. G. | Burkhanova, G. F. | Zaikina, E. A.
A comparative study of hydrogen peroxide (H₂O₂) generation, the character of a fungal catalase SNOG_03173.1 gene expression, and the catalase activity in wheat plants, infected with Septoria nodorum Berk. strains differing in their aggressiveness, has been carried out. The decreased intensity of H₂O₂ accumulation in infected tissues, influenced by an aggressive S. nodorum strain and caused by the enhanced transcriptional activity of the fungal catalase gene and the heightened synthesis of its product, has been revealed to be more expressed compared to a similar decrease influenced by a less aggressive strain. An assumption was made that the transcriptional activity of the fungi catalase gene and, therefore, the activity of catalase involved in the regulation of the H₂O₂ content in the infected zone of wheat plants represent important factors providing high aggressiveness and pathogenicity of S. nodorum.
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