Molecular Characterization of Pathogenicity Gene Homologs in Colletotrichum falcatum Causing Red Rot in Sugarcane
Variation in Colletotrichum falcatum causing red rot disease of sugarcane is well established at cultural, pathogenic and molecular level. However, limited information is available on genes responsible for pathogen virulence and its pathogenesis. To understand virulence in C. falcatum, detailed studies were taken up using phylogenetically differentiated two isolates viz., Cf671 and Cf92020 vary in their virulence with 28 pathogenicity gene homologs. Important pathogenicity gene homologs amplified were PKS1, SCD1, THR1, Cap5, Cap20, MAF1, Pg1, PG2, Pel1, Pel2, SSD1, APH1, ArpA, ICL1, RGT2, RAC1, CreA, HXT1 and HXT3. Characterization of gene sequences of the selected pathogenicity genes from C. falcatum revealed both intra- and interspecific variation and comparison of genomic sources sequenced among two distinct isolates revealed a definite role of pathogenicity genes in C. falcatum pathogenesis. Differential expression of the pathogenicity gene homologs between isolates has been validated during host pathogen interaction.The present investigation identified the role of pathogenicity genes and their differential expression in C. falcatum pathogenesis for the first time.
KeywordsRed rot Colletotrichum falcatum Pathogenicity gene homologs Virulence
The authors are grateful to the Director, ICAR-Sugarcane Breeding Institute for providing facilities and constant encouragement.
This study was done as part of ICAR-SBI fund.
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no conflict of interest.
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