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Table 4 Effect of storage time and temperature on antibacterial activity of rhizome extracts against bacterial strains

From: Changes in antioxidant and antibacterial activities as well as phytochemical constituents associated with ginger storage and polyphenol oxidase activity

Ginger varieties

 

Inhibition zone (mm)

 

Storage time (month)/temperature

S. aureus

B.subtilis

L.monocytogenes

E. coli

S. typhimurium

P. aeruginosa

Halia Bentong

fresh

11.5 ± 1.33b

12.5 ± 1.35c

14.0 ± 1.66b

12.0 ± 1.25b

11.0 ± 1.27a

13.5 ± 1.28a

4/(5 °C)

8.5 ± 0.69b

7.1 ± 0.68b

9.0 ± 0.73c

8.6 ± 0.54c

8.3 ± 0.26b

9.5 ± 1.01b

8/(5 °C)

5.3 ± 0.373d

4.2 ± 0.67d

5.6 ± 0.144e

3.5 ± 0.21e

3.5 ± 0.19d

5.6 ± 0.19d

4/(15 °C)

3.1 ± 0.22f

2.2 ± 0.12e

5.5 ± 0.16e

NO

NO

NO

8/(15 °C)

1.4 ± 0.13g

1.2 ± 0.08g

2.2 ± 0.09g

NO

NO

NO

Halia Bara

fresh

14.0 ± 2.62a

15.5 ± 2.52a

16.0 ± 2.15a

13.5 ± 1.55a

12.0 ± 1.42b

15.0 ± 1.26b

4/(5 °C)

9.2 ± 0.58b

8.5 ± 0.47a

11.5 ± 1. 88b

6.8 ± 0.46c

7.8 ± 0.81c

8.0 ± 0.61c

8/(5 °C)

6.4 ± 0.467c

4.6 ± 0.33c

6.5 ± 0.72e

2.0 ± 0.17d

2.4 ± 0.28d

3.5 ± 0.27d

4/(15 °C)

4.2 ± 0.329e

3.6 ± 0.29d

7.5 ± 0.58d

NO

NO

NO

8/(15 °C)

2.2 ± 0.149g

2.8 ± 0.18f

3.40 ± 0.15f

NO

NO

NO

  1. Data are means of triplicate measurements ± standard deviation. Means not sharing a common single letter in each column for each measurement were significantly different at p < 0.05. NO not obsorved