Table 3. In Vitro Antimicrobial Activities of Compounds 1–7 against Plant Pathogenic Fungi and Bacteria.
| |
MIC (μg mL–1) |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| plant pathogen | 1 | 2 | 3 | 4 | 5 | 6 | 7 | PCa | |
| fungus | A. brassicicola | 200 | 200 | 100 | 200 | >200 | >200 | >200 | 3.1 |
| B. cinerea | 200 | 200 | 100 | >200 | >200 | >200 | >200 | 25 | |
| C. cucumerinum | 100 | 100 | 100 | >200 | >200 | >200 | >200 | 50 | |
| C. coccodes | 200 | 200 | 100 | >200 | >200 | >200 | >200 | 6.3 | |
| C. destructans | 200 | 200 | 100 | >200 | >200 | >200 | >200 | 100 | |
| F. oxysporum | 200 | 200 | 100 | >200 | >200 | >200 | >200 | 25 | |
| M. oryzae | 12.5 | 12.5 | 6.3 | 200 | >200 | >200 | >200 | 6.3 | |
| P. infestans | 25 | 25 | 25 | 200 | >200 | >200 | >200 | 1.6 | |
| bacterium | A. avenae subsp. cattleyae | 6.3 | 6.3 | 25 | >200 | >200 | >200 | >200 | 6 |
| A. tumefaciens | 50 | 50 | 100 | >200 | >200 | >200 | >200 | 1 | |
| B. glumae | 100 | 100 | 200 | >200 | >200 | >200 | >200 | 0.4 | |
| C. michiganensis subsp. michiganensis | 200 | 200 | 200 | >200 | >200 | >200 | >200 | 0.4 | |
| D. chrysanthemi | 25 | 25 | 200 | >200 | >200 | >200 | >200 | 0.4 | |
| P. carotovorum subsp. carotovorum | 25 | 25 | 200 | >200 | 100 | 200 | >200 | 0.4 | |
| P. syringae pv. actinidiae | 100 | 100 | >200 | >200 | >200 | >200 | >200 | 1 | |
| R. solanacearum | 25 | 25 | 50 | >200 | >200 | >200 | >200 | 0.4 | |
| X. arboricola pv. pruni | >200 | >200 | >200 | >200 | >200 | >200 | >200 | 13 | |
a
Blasticidin-S and oxytetracycline were used as positive controls (PCs) for fungi and bacteria, respectively. 1, violaceol I; 2, violaceol II; 3, diorcinol; 4, versiol; 5, orcinol; 6, orsellinic acid; 7, and sydowiol C.