TABLE 1.

Characteristics of strains used in this study

Straina	RFLP clusterb	RFLP groupb	Genospeciesb	Host or origin	Country	Fluorescence on King's medium Bc	Growth stimulation on EDDHA-supplemented King's Bd	Source or referencee
P. syringae pv. tomato LMG 5093T	S1	A	III	Tomato	England	+	+	LMG
P. syringae pv. morsprunorum strains	S2A	K	II
LMG 2222				Cherry	England	+	+	LMG
LMG 5075 t1T				Plum	Unknown	+	+	LMG
PmC14				Cherry	Belgium	+	+	6
PmC22				Cherry	Belgium	−	+	This study
PmC29				Cherry	Belgium	−	+	This study
PmC36				Cherry	Belgium	−	+	6
PmC62				Cherry	Belgium	−	+	This study
P. syringae pv. syringae strains	S2B	M	I
B301D				Pear	England	+	+	6
PsP2				Pear	Belgium	+	+	6
LMG 5141				Pear	England	+	+	LMG
LMG 5191				Cherry	Switzerland	+	+	LMG
LMG 1247T				Lilac	England	+	+	LMG
PsM17				Corn	Belgium	+	+	This study
P. syringae pv. aptata strains	S2B	M	I
LMG 5059T				Sugar beet	United States	+	+	LMG
UPB 110				Sugar beet	Belgium	−	+	6
UPB 165				Sugar beet	France	−	+	6
P. syringae pv. atrofaciens strains	S2B	O	I
PaBG2a				Wheat	Belgium	+	+	This study
PaBF7a				Wheat	Belgium	+	+	This study
P. viridiflava LMG 2352T	V	Q	IX	Bean	Switzerland	+	+	LMG
P. fluorescens strains
LMG 1794T				Water	England	+	—f	LMG
LMG 5822				Creamery waste	Unknown	+	−	LMG

^aT = pathotype or type strain. 

^bData from reference 22. S1, first P. syringae cluster; S2A, first subcluster in the second P. syringae cluster; S2B, second subcluster in the second P. syringae cluster; V, P. viridiflava cluster. RFLP, restriction fragment length polymorphism. 

^c+, positive; −, negative. 

^dGrowth stimulation was observed after 18 h or less following the application of a 125-μg/ml solution of chelated siderophore of P. syringae pv. syringae B301D. +, positive; −, negative. 

^eLMG, Laboratorium voor Microbiologie van Gent, Belgian Coordinated Collections of Microorganisms, Ghent, Belgium. 

^fThis strain was able to grow on EDDHA-supplemented King's medium B under the conditions used in the experiment.