Characterization and growth profile of proteolytic strain PK-4 isolated from local slaughterhouse wastewater

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Table 3

Colony diameter, the diameter of the halo, and proteolytic index from strain PK4 at the medium with different initial pH conditions.

Parameter	Initial pH Medium
Parameter	7	8	9	10	11
Diameter of the colony (mm)	23.6 ±3.7^a	25.3 ±6.3^ab	27.3 ±4.6^ab	31.9 ±1.0^b	36.1 ±1.5^bc
Diameter of halo (mm)	25.1 ±3.7^a	29.4 ±4.3^a	32.1 ±4.4^ab	38.9 ±1.0^b	39.6 ±4.5^b
Indexs of proteolytic	0.13 ±0.03^a	0.23 ±0.05^b	0.0 ±0.03^ab	0.21 ±0.03^ab	0.16 ±0.01^ab

Noted:^a,b,c means in the same row with different superscript differ significantly (P<0.05)

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