Table 1.
A selected list of speeds of slow waves.
| no. | system | indicator | speed (μm s−1) |
|---|---|---|---|
| eggs | |||
| 1 | Beröe (Ctenophore; Houliston et al. 1993) | ‘peristaltic’ indentation | ∼0.2 |
| 2 | leech (Fernandez et al. 1990) | indentation | 1.0 |
| 3 | barnacle (Lewis et al. 1973; fig. 4B) | indentation | 0.4 |
| 4 | cricket (Vollmar 1972) | ‘peristaltic’ indentation | 0.4 |
| 5 | gall midge (Wolf 1985) | particle saltation | 0.3 |
| 6 | ascidian (Sardet et al. 1989) | indentation | 1.4 |
| 7 | medaka fish (Fluck et al. 1991) | calcium and indentation | 1.5 |
| 8 | zebrafish (Créton et al. 1998) | calcium via aequorin | 0.5 |
| 9 | Xenopus (Savage & Danilchik 1993) | ‘peristaltic’ indentation | 0.5 |
| 10 | toad (Dan 1960) | indentation | 0.6 |
| 11 | newt (Selman & Waddington 1955) | indentation | 1.4 |
| 12 | Xenopus (Muto et al. 1996) | calcium and indentation | 1.8 |
| 13 | maize (Antoine et al. 2000, fig. 3) | calcium influx | 1.1 |
| later in development | |||
| 14 | weevil (Miyamoto & van der Meer 1982) | yolk contraction | 0.2 |
| 15 | blowfly (Agrell 1962) | mitosis | 0.8 |
| 16 | Drosophila (Foe & Alberts 1983) | mitosis | 0.4 |
| 17 | Drosophila (Kam et al. 1991) | ingression | 0.2 |
| 18 | medaka's stellate layer (Simon & Cooper 1995) | calcium | 0.3 |
| 19 | chick embryo (Stern & Goodwin 1977) | cell movement | 0.7 |
| 20 | chick embryo (Robertson 1979) | cell movement | |
| parallel to somites | refractive index | 0.7 | |
| perpendicular to somites | refractive index | 0.3 | |
| other | |||
| 21 | Dictyostelium's mound formation (Rietdorf et al. 1996) | optical densitya | 1.1 |
| 22 | Dictyostelium's slug (Dormann & Weijer 2001) | optical densitya | 0.7 |
| 23 | isolated Dictyostelium cells (Bretschneider et al. 2004) | actin polymerization | 0.7 |
| 24 | two-dimensional Dictyostelium slugsb (Rieu et al. 2004) | autofluorescence | 1.0 |
| 25 | hydroid polyps (Beloussov et al. 1989) | cell reorientation | 1.0 |
| 27 | moss filaments (Tucker et al. 2005) | calcium | 2.0 |
| 28 | lily pollen (Malhó & Trewavas 1996) | calcium | 0.6 |
a
It was argued by Jaffe (1997) that these waves of optical density are the ones of surface cell contraction which would stretch surface cells (and hence their membranes) in nearby zones along the direction of wave movement.
b
These two-dimensional slugs are one cell thick, yet behave like natural slugs that are many cells thick (Bonner 1998).