Production of Fumaric Acid by Rhizoctonia solani

Abstract

Among 35 isolates selected from various anastomosis groups of Rhizoctonia solani, 22 isolates produced fumaric acid (FA) in their culture. As far as we know, FA has not previously been known as a metabolite of R. solani. No relationship with pathogenicity has been seen in FA productivity. Among the anastomosis groups there has been no difference in FA productivity, but a great difference has been seen among the isolates. In sugar beet roots naturally infected by R. solani a great amount of FA (47μg/g, fr. wt.) was detected, and in sugar beet root slices which had been artificially infected by inoculation with R. solani a little FA was detected.