Table 2.
Conidial measurements of Hyaloperonospora accessions from various Cardamine species and from Nasturtium officinale
| Species | Host | Length range (μm) | Width range (μm) | Mean length (μm) | Mean width (μm) | mean l/w ratio | Reference |
|---|---|---|---|---|---|---|---|
| H. cardamines-laciniatae | C. laciniata | (12-)18–22(−28) | (11-)14–18(−21) | 19.7 | 16.2 | 1.21 | Gäumann (1918) |
| C. diphylla | (18.5-)19.5–24(−29) (n = 54) | (16.5-)17.5–20(−22) (n = 54) | 21.8 | 18.7 | 1.16 | Present study (WU 32373) | |
| H. dentariae | C. heptaphylla | (11-)15–19(−23) | (9-)11–14(−18) | 16.5 | 13.4 | 1.23 | Gäumann (1918) |
| C. heptaphylla | 15–21 | 14–17 | – | – | – | Gustavsson (1959) | |
| C. heptaphylla | (15.5-)17–19(−21) (n = 55) | (13-)13,5–15,5(−17) (n = 55) | 18.0 | 14.5 | 1.24 | Present study (WU 32380) | |
| C. bulbifera | (14.5-)16–19(−21.5) (n = 73) | (13-)13.5–15.5(−18) (n = 73) | 17.6 | 14.6 | 1.20 | Present study (WU 32376) | |
| C. bulbifera | – | – | 19.3 | 16.0 | 1.20 | Gustavsson (1959) | |
| C. impatiens | (12.5-)14.5–17(−19.5) (n = 71) | (11-)12–13.5(−14.5) (n = 71) | 15.6 | 12.8 | 1.22 | Present study (WU 32388) | |
| C. pentaphyllos | (15.5-)18–21.5(−24.5) (n = 45) | (13.5-)15–17.5(−19.5) (n = 45) | 19.7 | 16.2 | 1.22 | Present study (WU 32391) | |
| H. dentariae-macrophyllae | C. leucantha | (16-)21–26(−29) | (12-)18–21(−24) | 23.1 | 18.8 | 1.23 | Gäumann (1918) |
| C. leucantha | (19-)22.5–25(−28) | (15-)17–21.5(−25) | 23.5 | 19.1 | 1.22 | Present study (KUS-F 17273) | |
| H. cardamines-enneaphyllos | C. enneaphyllos | (20.5-)22.5–24.5(−25) (n = 32) | (15,5-)16.5–19.5(−21.5) (n = 32) | 23.3 | 18.0 | 1.30 | Present study (WU 32392) |
| C. enneaphyllos | (19-)22–26.5(−29) (n = 44) | (16.5-)17.5–21(−22.5) (n = 44) | 24.2 | 19.3 | 1.26 | Present study (WU 32393) | |
| C. enneaphyllos | (17-)19.5–22.5(−25.5) (n = 73) | (16-)17–19(−20) (n = 73) | 21.2 | 17.9 | 1.18 | Present study (WU 32395) | |
| C. enneaphyllos | (19-)20.5–25(−28.5) (n = 66) | (15-)16.5–19.5(−22.5) (n = 66) | 22.7 | 18.0 | 1.26 | Present study (WU 32396) | |
| C. enneaphyllos | (16-)19–25(−28) | (12-)15–19(−24) | 22.0 | 18.3 | 1.20 | Săvulescu & Rayss (1930) | |
| C. enneaphyllos | – | – | 25.0 | 20.2 | 1.24 | Lindtner (1957) | |
| H. malyi | C. graeca | (16-)20–28(−33) | (14-)18–22(−25) | 26.4 | 21.2 | 1.24 | Lindtner (1957) |
| H. nasturtii-aquatici | N. officinale | ca. 16–27a | ca. 13–21a | 20.3 | 17.1 | 1.19 | Gäumann (1918) |
| N. officinale | 15–25 | 14–21 | – | – | – | Kochman and Majewski (1970) | |
| C. amara | (15.5-)18–22(−25) (n = 86) | (14-)16–19(−22) (n = 86) | 20.5 | 17.5 | 1.12 | Present study (WU 32398) | |
| C. amara | – | – | 19.1 | 15.6 | 1.23 | Gustavsson (1959) | |
| C. flexuosa | (14-)16–19(−20) (n = 39) | (12.5-)14–16 (−17) (n = 39) | 17.6 | 15.0 | 1.17 | Present study (WU 32400) | |
| C. hirsuta | (15-)16.5–19(−21.5) (n = 70) | (13-)14–16(−18) (n = 70) | 17.7 | 15.2 | 1.16 | Present study (WU 32402) | |
| C. hirsuta | – | – | 17.3 | 15.7 | 1.10 | Gustavsson (1959) | |
| C. pratensis | (15.5-)17.5–20(−21) (n = 59) | (14-)15–17(−18) (n = 59) | 18.8 | 16.0 | 1.17 | Present study (WU 32406) |
Hosts in bold denote type hosts. Note the variability of sporangial sizes commonly observed within collections from the same host, within the same Hyaloperonospora species, and the overlap in size range between most Hyaloperonospora species
arange measurements listed in Gäumann (1918: 528) erroneous; approximate range was estimated from spore size line graphs (Gäumann 1918: 466)