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Chemical and Biological Technologies in Agriculture

Table 1 Details of isolate, closest relative and physiological characteristics

From: Combined application of N-fixing PGPB and rice straw mulch compensates N immobilization by straw, improving crop growth

Isolate name

Closest relative based on 16S rRNA gene sequence (percentage similarity)

ARAa

Siderophore productionb

IAA production (µg ml−1)

SM199

Azotobacter chroococcum (100)

14,993

2.13

10.36

SM232

Azotobacter chroococcum (99.7)

6278

2.35

6.22

SM700

Azotobacter chroococcum (99.7)

13,571

2.75

12.88

SM662

Azotobacter salinestris (99.6)

3027

2.40

0.63

  1. aAcetylene reduction assay (ARA). Values represent activity expressed as nmol ethylene h−1
  2. bSiderophore production. Units represent the size of the orange area (in mm) caused by the presence of siderophores
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