Skip to main content

Table 2 Antimicrobial activity and MIC of S. nigrum, A. rusticana, and C. sativa extracts tested

From: Identification and antimicrobial activity of most representative secondary metabolites from different plant species

Bacteria

S. nigrum

A. rusticana

C. sativa Sample #1a

C. sativa Sample #2b

ZoI (mm)c

MIC (mg L−1)

ZoI (mm)c

MIC (mg L−1)

ZoI (mm)c

MIC (mg L−1)

ZoI (mm)c

MIC (mg L−1)

Gram+

 Bacillus cereus (A1I)

15.2 ± 1.0A

5 ± 1H

NI

37.0 ± 1.0C

5 ± 1H

36.5 ± 1.0C

5 ± 1H

 Bacillus thuringiensis (B7I2)

13.5 ± 0.8B

10 ± 1K

NI

37.5 ± 0.9C

10 ± 1K

37.5 ± 0.7C

5 ± 1H

 Bacillus amyloliquefaciens (A5TI)

15.0 ± 0.9A

10 ± 1K

NI

34.5 ± 0.9D

5 ± 1H

34.0 ± 0.9D

5 ± 1H

Gram−

 Pseudomonas orientalis (A14-1II)

13.5 ± 1.0B

10 ± 1K

NI

NI

 

NI

 

 Stenotrophomonas maltophilia (B9TIII)

15.0 ± 1.0A

10 ± 1K

NI

NI

 

NI

 
  1. Assays were performed in triplicate and results are the mean of three values ± standard deviation
  2. NI no inhibition zone was observed
  3. Different letters in superscript to numerical data indicate significant differences (p value < 0.05)
  4. aSample #1 is composed of flowers representative of the “Eletta campana” cannabis accession
  5. bSample #2 was obtained from a field mass selection of “Eletta campana” flowers having a higher THC and CBD content
  6. cZoI: diameter of inhibition zone obtained after 24 h of incubation in agar well diffusion assays. ZoI < 10 mm: low antimicrobial activity; 11 < ZoI < 15 mm: middle antimicrobial activity; ZoI > 16 mm: high antimicrobial activity