S. No

COLOUR CHANGE

pH Change

Gram staining

Strains

1st day

2nd day

3rd day

pH

Gram stain

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

6.

T1

T2

T3

BD1

BD2

BD3

B1

B2

B3

C1

C2

C3

CT1

CT2

CT3

Control

Light blue

Green

Light blue

Light blue

Light blue

Light blue

Light blue

Green

Light blue

Light blue

Light blue

Light blue

Light blue

Green

Light blue

Green

Blue

Light blue

Blue

Light blue

Light blue

Light blue

Blue

Light blue

Blue

Blue

Light blue

Light blue

Blue

Light blue

Blue

Green

 

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Dark blue

Green

 

9.6

9.3

9.8

9.6

9.5

9.4

9.4

9.6

9.7

9.8

9.7

9.7

9.4

9.6

9.8

7.0

-ve

-ve

-ve

-ve

-ve

-ve

-ve

-ve

-ve

-ve

-ve

-ve

-ve

-ve

-ve

--

Table 2: Results of colour changes, pH and Gram staining in the medium used for the growth of various Azospirillum strains.