Characterization of plant growth-promoting rhizobacteria from perennial ryegrass and genome mining of novel antimicrobial gene clusters

Table 1 Antimicrobial activity of the seven selected bacterial strains from perennial ryegrass

Pathogen types	Species or strains	MG27	MG33	MG43	MG52	MG64	MG75	MG84
Gram-negative bacteria	Erwinia carotovora subsp. brasiliensis LMG21371	+	+	+	–	–	–	–
	Pectobacterium carotovorum LMG05863	+	+	+	–	+	–	–
	Pseudomonas syringae pv. antirrhini LMG02131	+	+	+	++	+	+	++
	Pseudomonas syringae pv. tomato DC3000	+	+	+	++	+	+	++
	Ralstonia syzygii subsp. syzygii LMG06969	+	+	+	–	+	–	–
	Xanthomonas campestris pv. campestrisNCCB92058	+	++	++	++	+	+	++
	Xanthomonas translucens pv. graminisLMG587^*	+	++	++	++	++	++	++
Gram-positive bacteria	Streptomyces scabies ISP5078	+	+	+	++	+	–	++
Fungi	Botrytis cinerea	●	●	●	○	●	○	○
	Fusarium culmorum	●	●	●	○	●	○	○
	Fusarium oxysporum	●	●	●	○	●	○	○
	Rhizoctonia solani	●	●	●	○	●	●	●
	Magnaporthe oryzae Guy 11^*	●	●	●	○	●	○	○
	Pithomyces chartarum CBS485.71^#	●	●	●	○	●	○	○
	Claviceps purpurea f. secalis CBS112.45^#	●	●	●	○	●	●	●
Oomycetes	Pythium aphanidermatum	●	●	●	○	●	○	○
Oomycetes	Pythium ultimum	●	●	●	○	●	○	○

In the antibacterial assay, no inhibition (−), inhibitory zone < 5 mm (+), inhibitory zone ≥5 mm (++). In the antifungal/oomycetal assay, no inhibition (○), clear inhibition (●).
^*Pathogens used to screen the isolated strains
^#Mammalian pathogens

ISSN: 1471-2164