disease inoculation experiments Global View sugarcane smut sugarcane chitinase gene differentially plant hormone signal transduction pcr roc gene annotations expression data Sporisorium scitamineum scitamineum interactions Sporisorium scitamineum Challenge Illumina data Pathway enrichment analysis defense mechanisms Energy production Transcriptome Dynamics Ion transport resistance specificity cell wall fortification pathway flavonoid biosynthesis transcriptome sequencing chitinase gene ScChi show signal transduction mechanisms 120 h sugarcane genotypes sugarcane responses Transcriptome analysis scitamineum infection Obtained unigenes sugarcane industry transcript expressions sugarcane disease Correlation analysis