Table 5.
Changes in sporophyte dry weights from stomatal opening until spore maturation. Data from 10 (Atrichum, Brachythecium, Mnium, Polytrichum), 25 (Amblystegium, Bryum, Funaria, Dicranella,Rhynchostegium) or 50 (Ceratodon, Grimmia, Tortula) sporophytes. Approx. duration of stage in weeks in brackets.
| order | species | no. stomata | % weight increase during opening | % increase after open for two weeks/full size | % increase from open stomata to spores mature | % increase from stomata initiated to spores mature |
|---|---|---|---|---|---|---|
| content of intercellular spaces | liquid | gas | gas | liquid to gas | ||
| Polytrichales | Atrichum undulatum | 0 | n.a. | 17 | 25 (4–8) | n.a. |
| Polytrichum juniperinum | 80–120 | 19 (4–6) | 12 | 39 (8–16) | 65 | |
| Funariales | Funaria hygrometrica | 160–180–220 | 117 (2–4) | 28 | 46 (4–6) | 217 |
| Grimmiales | Grimmia pulvinata | 6–10 | 22 (4–6) | 25 | 27 (6–12) | 55 |
| Dicranales | Dicranella heteromalla | 0 | n.a. | 23 | 33 (4–8) | n.a. |
| Ceratodon purpureus | 8–10 | 29 (4–6) | 19 | 39 (4–8) | 79 | |
| Pottiales | Tortula muralis | 6–8 | 32 (4–6) | 17 | 34 (4–8) | 77 |
| Bryales | Bryum capillare | 70–90–120 | 23 (2–4) | 28 | 34 (6–16) | 65 |
| Mnium hornum | 20–30–40 | 31 (2–4) | 33 | 38 (4–8) | 81 | |
| Hypnales | Rhynchostegium confertum | 10–15 | 26 (2–4) | 16 | 29 (4–6) | 54 |
| Amblystegium serpens | 28–44–52 | 24 (2–4) | 16 | 28 (4–8) | 59 | |
| Brachythecium rutabulum | 20–30 | 14 (2–4) | 21 | 32 (4–8) | 51 |