Leaf development of the ostrich fern Matteuccia struthiopteris (L.) Todaro

摘要: The timing of emergence the three different leaf types Matteuccia struthiopteris is described from plants sampled over course a growing season. Vegetative leaves were first to appear, followed five weeks later by sporophylls and cataphylls. Leaf number type, total dry weight per plant assessed in weekly transects. fronds contributed most weight, which increased during four weeks, then remained constant for remainder Cataphylls, although numerous end season, little weight. Sporophylls occurred on widest with vegetative greatest whereas cataphylls except smallest. Experimentally defoliated re-examined late summer. Following initial harvest, often produced second smaller set leaves. These restricted Ability reissue leaves, especially fronds, declined very quickly after few Defoliated draw extensive reservoir developing are found rhizome, thus possibly diminishing ability withstand regular harvesting young food. Individual tagged measured Non-linear regression curves fitted growth data indicate that was best monomolecular curve fertile fronds. Cataphyllar could be equally well either or logistic function.