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Table 1 Morphological and cultural characteristics of indigenous symbiotic bacterial isolates from legumes

From: Characterization of symbiotic and nitrogen fixing bacteria

Characteristics

Morpho-cultural description of isolates

KSM 1

KSM 2

KSM3

KSM 4

KSM 5

KSM 006

KSM 7

KSM 8

MMUST 3

MMUST 4

MMUST 5

MMUST 6

Congo Red Absorption

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

BTB reaction

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

Colony colour

Cream yellow

Cream

White

Cream white

Milky white

Milky white

Cream yellow

Cream white

Cream white

Milky white

Cream yellow

Milky white

Cream yellow

Colony transparency

Opaque

Translucent

Opaque

Opaque

Translucent

Translucent

Opaque

Translucent

Opaque

Translucent

Opaque

Opaque

Colony appearance

SHINY

SHINY

SHINY

DULL

DULL

SHINY

SHINY

SHINY

SHINY

SHINY

DULL

DULL

EPS production

✓

✓

✓

x

x

✓

✓

✓

x

✓

x

✓

Colony texture

Firm dry

Smooth viscous

Smooth viscous

Firm dry

Firm dry

Smooth viscous

Smooth viscous

Smooth viscous

Smooth viscous

Smooth viscous

Firm dry

Firm dry

Colony shape

Circular

Oval

Oval

Circular

Circular

Circular

Oval

Oval

Circular

Circular

Circular

Circular

Colony elevation

Convex

Convex

Convex

Convex

Convex

Convex

Convex

Convex

Convex

Convex

Convex

Convex

Colony diameter (mm)

3.7

4.7

5.7

3.7

4.0

3.7

5.0

3.3

4.7

3.3

3.0

1.0

Gram stain

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

✓

Colony margin

Entire

Entire

Entire

Entire

Entire

Entire

Entire

Entire

Entire

Entire

Entire

Entire

  1. BTB bromothymol blue, EPS exopolysaccharides, ✓ positive reaction, ×  negative