Table A1.

Pseudomonas strains used in these experiments, and their geographical origin

Pseudomonas strains	Pseudomonas fluorescens subgroup	Pseudomonas strains' origin
CHA0	(Pseudomonas protegens)	Tobacco, Switzerland (Natsch et al., 1994)
Pf‐5	(P. protegens)	Cotton, USA (Howell & Stipanovic, 1979)
Q2‐87	(Pseudomonas corrugata)	Wheat, USA (Bangera & Thomashow, 1999)
Q8R1‐96	(P. corrugata)	Wheat, USA (Raaijmakers & Weller, 1998)
1M1‐96 (P. fluorescens)	Not reported	Wheat, USA (Raaijmakers & Weller, 2001)
MVP1‐4 (P. fluorescens)	Not reported	Pea, USA (Landa et al., 2002)
F113	(P. corrugata)	Sugar beet, Ireland (Shanahan et al., 1992)
Ph11C2 (P. fluorescens)	Not reported	Tomato, France (Govaerts et al., 2007)