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Table 3 Effect of temperature, pH, light and enzymatic treatments on the antifungal activity of culture supernatant of Streptomyces sp. MR14

From: Biocontrol and plant growth promoting potential of phylogenetically new Streptomyces sp. MR14 of rhizospheric origin

Treatment

Streptomyces sp. MR14

Zone of inhibition (mm) against F. moniliforme

Residual activity (%)

Control (untreated)

35.0 ± 0.0

100.0

Heat treatment

 37 °C, 1 h

35.0 ± 0.1

100.0

 50 °C, 1 h

34.0 ± 0.2

97.14

 70 °C, 1 h

27.0 ± 1.0

77.14

 100 °C, 1 h

18.0 ± 0.5

51.42

 121 °C, 45 min

0.0 ± 0.0

0.0

Low temperature treatment

 − 20 °C, 1 h

35.0 ± 0.1

100.0

Enzymatic treatment

 Proteinase K

34.0 ± 0.0

97.14

Photostability

 Sunlight, 1 h

15.0 ± 0.5

42.85

 UV light, I h

34.0 ± 0.1

97.14

pH tolerance

 pH 2.0

33.0 ± 0.5

94.28

 pH 14.0

20.0 ± 1.0

57.14

  1. Values represented as mean ± S.D (n = 3)