Induced-resistance in sugarcane against pathogenic bacteriaXanthomonas albilineans mediated by an endophytic interaction

Inductions of systemicresistance in sugarcane-G. diazotrophicus interactions which protect the plants againstX. albilineans attack have been demonstrated.G. diazotrophicus activates the sugarcane defense response resulting in the plant resistance toX. albilineans, in this particular case controlling the pathogen transmission to emerging agamic shoots. A total of 47 differentially expressed transcript derived fragments (TDFs) were identified by cDNA-AFLP. Transcripts showed significant homologies to genes of the ethylene signaling pathway (26%), proteins regulates by auxins (9%), β-1,3 Glucanase proteins (6%) and ubiquitin genes (4%), all major signaling mechanisms. A new role for the plant growth-promoting nitrogen-fixing endophytic bacteriaGluconacetobacter diazotrophicus has been identified and characterized while it is involved in the sugarcane-Xanthomonas albilineans pathogenic interactions.