spore leaf

Article

July 6, 2022

Sporophylls are leaves that are differentiated to attach spores. Found in some fern plants. It is common in fern plants other than fern phylum, but not so much in fern phylum.

Features

A sporophyll is a leaf in a fern plant whose morphology has been specially changed to attach spores. In reality, spores are formed by entering the spore sac, so it is more correct to say that it is a leaf that attaches the spore spore. Each group of ferns attach spores to their own location. In Psilotaceae and Clubmoss, the spore spore is attached to the upper surface of the root of the leaf or the upper surface of the leaf, and in other cases, it is attached to the lower surface of the leaf. When fully grown, some have spore spores on all leaves, while others have spores on only some leaves. Furthermore, if there is a clear difference between the leaves with sporophylls and the leaves without sporophylls, the leaves with sporophylls are called sporophylls. In ferns where sporophylls are distinguished, leaves that do not produce spores are the center of photosynthesis, so they are called vegetative leaves. Alternatively, sporophylls are sometimes called real leaves and vegetative leaves are sometimes called bare leaves. When there is a distinction between macrospores and microspores in spores, and there is a distinction between leaves that bear macrospores and leaves that bear microspores, the former is called macrospore leaves and the latter is called microspore leaves. However, there is no such thing as modern ferns.

In the case of clubmoss

The leaves of this class are scaly and small, and the spore spores ride on the base of the leaves. In clubmoss, the leaves that bear spores concentrate on the tips of the stems, forming something like spikes. Selaginella tamariscens are divided into large spores and microspores, and have various arrangements in the sporulation site. Isoetes have spore sac on the inside and top of the root of elongated leaves. Spores are divided into macrospores and microspores, but there is no apparent difference in spore spores.

For horsetails

Horsetail spores are formed on the pine cone at the tip of the stem. The best known is horsetail. This part is made up of sporophylls arranged in a spiral around the stem. The individual sporophylls are shield-shaped and produce sporophylls on the underside. The shield-shaped leaves come into contact with each other to form the outer surface, which dries to create opacity, from which spores are sprayed. This shape resembles a coniferous flower.

For ferns

Heterogeneous in this group are salvinia natans and marsilea quadrifolia, which produce large spores and microspores. However, there is no apparent difference between them, and there is no morphological difference in the leaves from which they are made. Another honeybee family, such as Adder's-tona, Adder's-tona, and Cobra, has different morphologies, but the relationship between sporophylls and vegetative leaves is the same. The branches that arose in the leaves are sporophylls. The sporophyll is a state in which sporophylls are lined up on the axis and has no leaf blade. Other than that, most ferns have no difference between sporophylls and vegetative leaves, and if they grow well, sporophylls are formed on the underside of all leaves in the form of sporophylls. This is called vegetative sporophyll. Among them, those with sporophyll differentiation are gradually found in various taxa. Some sporophylls differentiate in most of one family or genus (Plagiogyria, Sensitive fern, etc.), while others within the same genus may or may not differentiate sporophylls (Plagiogyria, etc.). In many cases, the vegetative leaves are wide.