Table 1.
Effect of chitosan solution on the growth of Xanthomonas sp. pathogenic to Euphorbia pulcherrima from different concentration from geographical sources.
| Strain number | Species identity | Strain source | OD600 reduction relative to the control (%) | |
|---|---|---|---|---|
| Chitosan A | Chitosan B | |||
| LMG849 | X. axonopodis pv. poinsettiicola | India | 24.20 ± 2.32 cd | 20.94 ± 2.29 c |
| LMG5401 | X. axonopodis pv. poinsettiicola | India | 49.95 ± 4.48 f | 52.52 ± 3.21 e |
| LMG5402 | X. arboricola pv. poinsettiicola | New Zealand | 61.88 ± 6.07 g | 14.35 ± 2.04 ab |
| LMG5403 | X. arboricola pv. poinsettiicola | New Zealand | 53.50 ± 4.74 fg | 15.40 ± 1.61 abc |
| LMG8675 | X. arboricola pv. poinsettiicola | New Zealand | 14.40 ± 1.25 ab | 16.35 ± 1.25 abc |
| LMG8676 | X. arboricola pv. poinsettiicola | New Zealand | 17.11 ± 1.77 abc | 16.07 ± 1.94 abc |
| R22578 | X. axonopodis pv. poinsettiicola | Hangzhou, China | 17.91 ± 1.61 abc | 19.75 ± 1.22 bc |
| R22579 | X. axonopodis pv. poinsettiicola | Hangzhou, China | 39.47 ± 4.16 e | 13.12 ± 1.28 a |
| R22580 | X. axonopodis pv. poinsettiicola | Hangzhou, China | 30.52 ± 3.27 de | 39.51 ± 3.16 d |
| HN-1 | X. axonopodis pv. poinsettiicola | Hainan, China | 11.17 ± 1.27 a | 34.53 ± 2.29 d |
| HN-18 | X. axonopodis pv. poinsettiicola | Hainan, China | 23.32 ± 2.43 bcd | 34.05 ± 2.21 d |
| HN-20 | X. axonopodis pv. poinsettiicola | Hainan, China | 9.26 ± 1.10 a | 16.45 ± 1.45 abc |
| LSD0.05 | 9.33 | 6.13 | ||
| ANOVA P-values | ||||
| Chitosan | <0.001 | |||
| Bacteria | <0.001 | |||
| Chitosan × Bacteria | <0.001 | |||
Initial concentration of bacteria is approximately 107 cfu/mL. Data from the repeated experiment were pooled and presented as means ± standard error. Means in a column followed by the same letter are not significantly different according to LSD test (P = 0.05).