Table 2. Summary of morphological data for Colletotrichum isolates.
| Group | Species | Colonies appearance | Growth rate (mm/day) | Conidia |
Conidial appressoria |
Characteristics of mycelial appressoria | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Length (μm) | Width (μm) | Shape | Length (μm) | Width (μm) | Characteristics | |||||
| Group 1(23)† | Colletotrichum gloeosporioides, C. siamense | pale yellowish colonies, reverse white | 5.6 ± 1.2 ab* 4.7–6.7 | 16.5 ± 2.0 c* 12.0–24.2 | 5.5 ± 0.6 b* 3.8–7.3 | Cylindrical | 7.6 ± 1.0 c* 5.5–9.9 | 5.9 ± 0.6 b* 4.8–7.7 | brown to dark black, ovoid to slightly irregular | light brown to brown, ovoid or slightly irregular to irregular |
| Group 2(16) | C. fructicola | white to black green | 5.9 ± 0.4 ab 5.4–6.6 | 16.2 ± 2.1 c 11.1–25 | 5.5 ± 0.6 b 2.5–7.7 | Cylindrical | 7.9 ± 0.6 bc 6.2–9.1 | 6.1 ± 0.5 ab 4.4–7.2 | brown to dark black, ovoid to slightly irregular | light brown to brown, ovoid, clavate and slightly irregular to irregular, smooth or slightly lobed |
| Group 3(32) | C. truncatum | pale grey to dark grey, reverse dark brown | 4.5 ± 0.5 b 3.9–5.4 | 24.1 ± 1.9 a 18.8–29.87 | 3.7 ± 0.3 d 2.7–4.9 | Falcate | 7.8 ± 1 bc 4.6–11.2 | 5.4 ± 0.5 c 4.1–7 | brown to dark black, ovoid to slightly irregular | brown to dark brown, ovate, ellipsoidal or slightly irregular to irregular |
| Group 4(7) | C. scovillei | white to pale orange, reverse pale orange | 3.8 ± 0.4 c 3.3–4.2 | 11.7 ± 2.3 d 8.2–17.2 | 3.7 ± 0.3 d 3.1–4.6 | Fusiform | 6.0 ± 1.2 d 4.2–9 | 4.8 ± 0.5 d 3.5–6.0 | Grey, globular in shape | light brown to brown, globose, ovate to slightly irregular |
| Group 5(6) | C. brevisporum | pale grey, reverse black | 5.3 ± 0.6 b 5.0–5.8 | 19.3 ± 1.3 b 16.3–22.2 | 5.2 ± 0.5 c 4.2–6.3 | Long cylindrical | 8.0 ± 0.8 b 6.1–9.5 | 6.2 ± 0.5 a 5–7.9 | brown to dark black, ovoid to slightly irregular | brown to dark brown, sometimes black in the middle, ovoid or slightly irregular to irregular |
| Group 6(4) | C. sichuanensis | pale grey, reverse pale grey | 6.1 ± 0.4 a 5.5–6.7 | 16.7 ± 1.2 c 14.2–19.1 | 6.3 ± 0.4a 5.4–6.7 | Cylindrical | 11.1 ± 1.7 a 8–14.2 | 6.3 ± 2.0 a 4.3–11.0 | brown to dark brown, irregular with a crenate edge | light brown to brown, ovoid or slightly irregular to irregular |
†The numbers shown in parentheses represent the number of isolates in each group.
*The mean difference is significant at the 0.05 level; the values with same letter in a column do not significantly differ according to Duncan’s multiple range test.