Table 3 Quantitative assays of isolates plant growth promoting traits including indole acetic acid (IAA), gibberellic acid (GA_s)_, exopolysaccharides (EPS), hydrogen cyanide (HCN), ammonia, and siderophores production in addition to phosphate solubilization and qualitative assessment of nitrogen fixation ability

Brevibacillus MAP4

58.43 ± 0.75 ^h

160.5 ± 1.32^d

582 ± 0.34^e

12.63 ± 0.01^d

18.8 ± 0.01 ^l

45.8 ± 0.26^d

50.61 ± 1.6^b

 + 

Bacillus MAP3

74.16 ± 0.31^d

140.5 ± 0.28 ^h

153.8 ± 0.62 ^h

10.68 ± 0.14^e

32.8 ± 0.00 ^g

ND

43.6 ± 0.4^d

ND

Pseudomonas MAP5

68.55 ± 0.46^f

154.2 ± 0.25^f

606.8 ± 0.00^a

ND

36.2 ± 0.3^d

ND

ND

 + 

Rhizobium MAP7

82.03 ± 0.37^c

207 ± 1.61^b

601.2 ± 0.1^b

87.52 ± 0.6^a

50.5 ± 0.47^c

66.2 ± 1.1^a

71.6 ± 0.00^a

 + 

Pseudomonas MAP8

69.67 ± 1.06^e

156.4 ± 0.40^e

334.9 ± 0.01 ^g

13.07 ± 1.1^d

24.8 ± 0.22^j

36.8 ± 0.00^e

41.17 ± 0.17^f

 + 

Rhizobium RTR1001

64.05 ± 0.44 ^g

145.8 ± 1.15 ^g

131.5 ± 0.00^j

ND

26.6 ± 0.83 ^h

31.5 ± 0.26^f

39.39 ± 0.34 ^h

 + 

Bacillus DeltaYSK

130.34 ± 0.10^a

132.4 ± 0.75^j

602.5 ± 0.97^b

18.31 ± 2.7^c

32.7 ± 0.97^f

55 ± 0.37^c

40.29 ± 0.82 ^g

 + 

Brevibacillus DesertYSK

126.97 ± 0.19^b

385 ± 0.49^a

587 ± 0.48^d

57.86 ± 0.07^b

59.7 ± 0.00^a

57.6 ± 0.64^b

38.46 ± 0.21ⁱ

 + 

Enterobacter DeltaPSK

57.31 ± 0.75ⁱ

127.6 ± 0.8 ^k

152.9 ± 0.07ⁱ

ND

22.9 ± 0.02 ^k

ND

35.4 ± 0.00 ^k

ND

Enterobacter DesertPSK

35.96 ± 0.31 ^k

137.9 ± 1.42ⁱ

372 ± 0.11^f

ND

33.8 ± 0.84^e

ND

36.5 ± 0.00^j

ND

Bacillus B2L2

15.74 ± 0.01 ^m

123.5 ± 0.44 ^l

ND

ND

51.7 ± 0.01^b

ND

42 ± 1.4^e

 + 

Enterobacter E1S2

26.97 ± 0.10 ^l

173.6 ± 0.20^c

ND

ND

27.3 ± 0.00 ^h

ND

34 ± 0.73 ^l

ND

Klebsiella MK2R2

39.33 ± 0.19^j

132.2 ± 0.70^j

599.8 ± 0.06^c

ND

26 ± 0.21ⁱ

27.3 ± 0.00 ^g

47 ± 0.22^c

ND

LSD

0.52

0.7

0.68

1.2

0.44

0.42

0.56

 −