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Table 2 Plant growth-promoting ability of endophytes at different salt concentrations

From: Endorhizosphere of indigenous succulent halophytes: a valuable resource of plant growth promoting bacteria

Isolate

ACC consumptiona

Production

Solubilization index (SI) (cm)

IAA (µg ml−1)

Ammonia

Siderophore

EPS

Biofilmb

Potassium

Phosphate

Zinc

NaCl concentration % (w/v)

0

3

7

0

3

7

0

3

7

0

3

7

0

3

7

0

3

7

0

3

7

0

3

7

14A2

2.71

/

+

+

/

+

/

+

+

/

M

W

/

7.39

2.58

/

3.47

2.96

/

4.27

4.57

/

14A5

2.77

/

+

+

/

+

+

/

+

+

/

W

N

/

8.64

5.12

/

4.53

3.29

/

5.05

5.55

/

14.2

5.0

+

+

+

+

+

W

W

W

2.29

14KX1

+

+

+

+

+

+

+

+

+

W

N

N

14KX2

4.62

4.00

+

+

+

+

+

+

+

+

+

M

M

W

15K13

+

+

+

+

+

+

+

+

+

M

W

W

15.2

4.13

+

+

+

+

+

+

M

N

W

15K2

4.00

+

+

+

+

+

W

W

N

15A1

2.75

/

+

+

/

+

+

/

+

+

/

M

W

/

5.33

2.72

/

2.87

/

4.27

2.60

/

15A2

2.80

/

+

+

/

+

+

/

+

+

/

W

N

/

5.23

2.55

/

2.92

2.40

/

3.10

2.76

/

16A1

2.73

/

+

+

/

+

+

/

/

W

W

/

5.86

3.13

/

2.95

/

4.03

3.14

/

16.1

+

+

+

+

+

+

M

M

N

2.60

2.51

2.29

16.2

4.13

+

+

+

W

W

W

16.4

4.10

+

+

+

+

+

W

M

W

16K2

2.10

2.40

2.93

+

+

+

+

+

W

M

M

16K5

3.46

+

+

+

+

+

+

W

W

W

16K7

+

+

+

+

+

+

M

M

M

16KX1

+

+

+

+

+

+

+

+

+

M

M

W

16KX2

+

+

+

+

+

N

W

N

16KX3

4.10

2.85

+

+

+

+

+

+

W

W

W

  1. +, positive, −, negative, /, unable to grow
  2. aThe ACC consumption value of each isolate was calculated by subtracting the value of ACC concentration after incubation from the initial concentration of 3 mM in DF medium
  3. bBiofilm: N, non producing; W, weak producing; M, moderate producing; S, strong producing