Table 1 Bacterium strains used in this study

Pseudomonas syringae pv. syringae 61

HR causing in tobacco,

Incompatible

Gram-negative

Prof. Dr. A. Collmer, Cornell University, Ithaca, USA [52];

Pseudomonas syringae pv. syringae 61-1530B

PTI causing in tobacco, No symptoms

Gram-negative

hrcC- mutant strain

Prof. Dr. A. Collmer, Cornell University, Ithaca, USA [5];

Pseudomonas syringae pv. tabaci H10

Compatible pathogenic on tobacco

Gram-negative

NCAIM¹ B.01601

Pseudomonas syringae pv. tomato DC3000

Compatible pathogenic on Arabidopsis and tomato

Gram-negative

Prof. Dr. A. Collmer, Cornell University, Ithaca, USA [53];

Pseudomonas syringae pv. tomato DC3000 Lux

Compatible pathogenic on Arabidopsis and tomato

Gram-negative, with insertion of the luxCDABE operon from Photorhabdus luminescens

Prof. Dr. Julia Vorholt, ETH Zurich, Switzerland [29, 54];

Clavibacter michiganensis subsp. michiganensis

Tomato pathogen

Gram-positive

NCAIM¹ B.01276

Curtobacterium flaccumfaciens pv. flaccumfaciens

Bean pathogen

Gram-positive

NCAIM¹ B.01609

Pectobacterium atrosepticum

Potato pathogen

Gram-negative

(previously Erwinia carotovora pv. atroseptica)

NCAIM¹ B.01611

Pectobacterium carotovorum subsp. carotovorum

Diverse host range (beet, potato etc.)

Gram-negative

(previously Erwinia carotovora)

NCAIM¹ B.01109^T

Xanthomonas campestris pv. campestris

Pathogen of cabbage and other crucifers

Gram-negative

NCAIM¹ B.01224

Agrobacterium tumefaciens C58C1

Disarmed laboratory strain

Gram-negative

(updated name Rhizobium radiobacter)

Dr. Sándor Süle, Plant Protection Institute, ELKH Centre for Agricultural Research, Budapest, Hungary [25];

Agrobacterium tumefaciens 15

Wild type isolate from cherry

Gram-negative

(updated name Rhizobium radiobacter)

Dr. Sándor Süle, Plant Protection Institute, ELKH Centre for Agricultural Research, Budapest, Hungary [24];

Agrobacterium tumefaciens 3

Wild type isolate from sour cherry

Gram-negative

(updated name Rhizobium radiobacter)

Agrobacterium tumefaciens B6

Wild type isolate from dahlia

Gram-negative

(updated name Rhizobium radiobacter)