Table 1.
Comparison of the morphological characters and growth rate of Intumescentia species recovered in this study.
|
Intumescentia
tinctorum |
Intumescentia
vitii |
Intumescentia
pseudolivetorum |
Intumescentia
ceratinae |
|
|---|---|---|---|---|
| No. of isolates | 3 | 1 | 1 | 1 |
| Conidia | ||||
| Characteristics | - | - | Thick walled, bi- or tri-celled, septa transverse, multi-guttulate | Thick-walled, dark brown in color, multi-guttulate |
| Shapes | - | - | Fusioid to columnar | Columnar to doliiform |
| Mean size (μm) | - | - | 6.65 × 4.4 | 7.49 × 3.29 |
| Range (μm) | - | - | 2.94–15.7 × 3.03–7.07 | 5.12–11.59 × 1.35–3.9 |
| Chain of conidia | ||||
| Characteristics | - | - | Catenulate, two to eight in a chain, apical in position, caducous, | Catenulate, three to four in a chain, lateral or terminal in position, caducous |
| Mean size (μm) | - | - | 24.50 × 5.99 | 31.61 × 3.50 |
| Range (μm) | - | - | 13.46–45.41 × 4.21–11.12 | 7.16–75.41 × 2.09–4.93 |
| Sexual system | Sterile | Sterile | Sterile | Sterile |
| Hypha | ||||
| Characteristics | Hyphae smooth, septate, multi-guttulate, branched, compartments variable in size and often distorted | Hyphae smooth, branched, septate, septa constricted, compartment often peanut-shaped, multi-guttulate, guttles small in size, compartment variable in size often distorted | Hyphae smooth, septate, septa slightly constricted, multi-guttulate, compartments columnar, variable in size | Hyphae asperulous, brown in color, septate, multi-guttulate, branched, compartments variable in size, usually with hyphal swelling that are apical or intercalary in position, lateral branching usually arising from swollen compartments. |
| Color | Light brown | Dark brown | Brown | Blackish brown |
| Mean size (μm) | 3.23 | 4.09 | 2.95 | 3.4 |
| Range (μm) | 2.01–5.05 | 2.64–7.31 | 2.13–4.37 | 1.54–5.03 |
| Hyphal swellings | Globose, sub-globose | Globose, irregular | Sub-globose, irregular | Globose, sub-globose, irregular |
| Colony morphology on PDA | Black-brown, compact, greenish gray in color, tomentose, margin entire, irregularly lobed | Blackish brown, compact, superficial, short tomentose, margin entire, irregularly lobed | Blackish brown, compact, superficial, tomentose, margin, entire, irregularly lobed | Blackish brown in colour, compact, superficial, slightly raised in the left and villose, margin finely serrated, irregularly lobed. |
| Growth temperatures | ||||
| Minimum (°C) | 5 | 5 | 5 | 5 |
| Maximum (°C) | 30 | 30 | 30 | 30 |
| Optimum (°C) | 20 | 25 | 25 | 25 |