Phalogenetic analysis of the 16s rRNA gene sequence positioned isolate G2Ec8 in this cluster equally close to the type strains of four species : xanthomonas gardneri ATCC 19865t , xanthomonas compestris ATCC 33913T , xanthomonas cynarae CFBP 4188T and xanthomonas cucurbitae LMG 690t (99.93% sequence identity).