Table 1. Number of genes within each functional category with significant contributions to apoplastic fitness in all three host plant species tested.

Functional Category	Fitness < -1	Fitness < -2
Amino acid metabolism and transport	22	15
Unclassified	14	4
Type III secretion system	12	1
Cofactor metabolism	11	0
Polysaccharide synthesis and regulation	6	2
Nucleotide metabolism and transport	4	3
Replication and DNA repair	4	0
Hypothetical	3	2
LPS synthesis and transport	3	2
Carbohydrate metabolism and transport	2	1
Cell division	2	1
Peptidoglycan/cell wall polymers	2	1
Proteases	2	1
Phytotoxin synthesis and transport	1	0
Transcription—Sigma factor	1	1
Transcriptional regulation	1	0
Total	90	34

Fitness cutoffs of < -1 and < -2 are both shown. Functional category annotations are primarily based on COG [16] and KEGG [17] annotations, with manual additions and corrections originally published by Yu et al. [18].