Table 3 Numbers of putative genes encoding transporters in genomes of four pseudomonad PGPR

Carbohydrate transporter genes

125

108

103

46

Major facilitator family (MFS)

76

75

75

17

ATP binding cassette (ABC) family

32

19

11

11

Tripartite ATP-Independent periplasmic transporter family

5

5

10

14

Phosphotransferase system (PTS)

6

6

4

3

Gluconate transporter GntT

6

5

3

1

Amino acid transporter genes

181

207

109

71

ABC transporter

137

156

70

55

Lysine exporter (LysE) family

18

24

13

11

Amino acid-polyamine-organocation (APC) family

16

21

21

5

Drug/metabolite transporter (DMT) family

10

6

5

0

Transporter genes related to defense

79

78

48

38

ABC transporter

37

46

24

19

Resistance-nodulation-cell-division (RND) family

35

25

15

15

Multidrug and toxic compound extrusion (MATE) family

3

4

2

2

Small multidrug resistance (SMR) family

4

3

7

2