| Scientific Name | Hyaloperonospora arabidis-glabrae (Gäum.) J.Sung Lee & Y.J. Choi, Mycobiology 45 (3): 145 (2017) [MB 821809] |
|---|---|
| Synonyms | ≡ Peronospora arabidis-glabrae Gäum., Beih. Bot.Zbl. 35: 520 (1918) |
| Disease | Downy mildew |
| Taxonomic Rank | |||
|---|---|---|---|
| Order | Peronosporales | Family | Peronosporaceae |
| Host Plant | |||
|---|---|---|---|
| Common Name | Tower rockcress (장대나물) | Scientific Name | Arabis glabra |
| Distribution | Germany, Korea |
|---|---|
| Characteristics | Down hypophyllous, whitish to yellowish, dense, felt-like. Haustoria filling the host cell partly to almost completely, lobate. Conidiophores emerging through stomata, up to 25 in a fascicle, hyaline, somewhat stout, straight to slightly curved, (292.4–)348.3–424.2–500.1(–603.8) µm; trunk straight, (150–)200–300(–350) µm long, (7–)9–12(–14) µm wide (n = 30). Ultimate branchlets mostly in pairs, but rarely single, reflexuous to sigmoid, (3.3–)5.8–8.8–11.8(–16.7) µm long, (0.9–)1.6–2.0–2.4(–2.7) µm wide at the base; tip obtuse or subtruncate (n = 30). Conidia hyaline, ellipsoidal to subglobose, (18.7–)20.0–21.6–23.2(–25.4) µm long, (15.1–)16.0–17.0–17.9(–19.9) µm wide, a length to width ratio of (0.94–)1.04–1.15–1.26(–1.46) (n = 30), the greatest width median, rarely sub- or supra-median, tip and base rounded; pedicel mostly present as a scar. Resting organs not seen. |
| Notes | Hyaloperonospora arabidis-glabrae was originally described as Peronospora arabidis-glabrae on Turritis glabra (= Arabis glabra). Korean collections were morphologically consistent with Gäumann's species concept, particularly in their relatively tall conidiophores, and formed a distinct phylogenetic lineage from H. arabidis-turritae based on ITS and cox2 sequences (Lee et al., 2017). The species is also recorded from Germany on T. glabra (Jage, 2020). |
| Economic importance | Turritis glabra is primarily a wild plant, and no significant agricultural or commercial losses caused by downy mildew diseases have been documented. |
| References | Gäumann, E. A. 1918. Beih. Bot. Centralbl. 35:395. Jage, H. 2020. Pilzflora von Sachsen-Anhalt: Phytoparasitische Kleinpilze. Teil 1. Natur+Text, Rangsdorf. Lee, J. S., et al. 2017. Mycobiology 45:139. |
