Table 2.
Morphological characteristics of Plasmopara species parasitic on Impatiens species.
| Plasmopara species | P. sp. | P. obducensa | P. velutinaa | P. destructora |
|---|---|---|---|---|
| Host species | Impatiens textori | Impatiens noli-tangere | Impatiens balsamina | Impatiens walleriana |
| Sporangia | ||||
| Length (µm) | (10.5–)15.4–17.6–19.8 (–23.9) | (9.6–)13.6–15.9–18.1 (–23.5) | (10.6–)14.9–17.3–19.6(–31.2) | (10.7–)13.7–15.9–17.9(–23.3) |
| Width (µm) | (9.7–)13.7–15.3–16.8(–19.8) | (8.5–)11.3–13.3–15.4–(–15.5) | (9.1–)12.8–14.6–16.3(–22.9) | (8.5–)11.9–13.7–15.4 (–18.9) |
| Ratio of length/width | (1.00)1.07–1.15–1.24(–1.65) | (1.00)1.08–1.20–1.32(–1.76) | (1.01)1.09–1.20–1.31(–2.00) | (1.00)1.09–1.21–1.33(–1.69) |
| Ultimate branchlets | ||||
| Length (µm) | (4.2–)7.6–10.0–12.4(–17.9) | (3.7–)5.7–7.8–9.9(–14.2) | (3.9–)5.5–7.4–9.35(–16.6) | (3.2–)6.5–9.0–11.5(–16.7) |
| Sporangiophores | ||||
| Length (µm) | (250–)410–540–670(–90) | (90–)261–373–485(–659) | (209–)302–393–483(–650) | (189–)325–429–532(–728) |
| Height of first branching (µm) | (110–)230–340–450(–710) | (54–)124–197–271(–417) | (60–)127–202–277(–422) | (60–)142–217–292(–433) |
| Ratio of first branching/length | (0.30–)0.50–0.63–0.76(–0.85) | (0.19–)0.43–0.53–0.63(–0.80) | (0.16–)0.38–0.51–0.64(–0.79) | (0.24–)0.39–0.51–0.62(–0.71) |
a
Measurements of Görg et al. [14].
Numbers with the underlines indicate the average of the measurements.