Table of Contents
What is found in the sorus?
Sorus, plural sori, in botany, brownish or yellowish cluster of spore-producing structures (sporangia) usually located on the lower surface of fern leaves. A sorus may be protected during development by a scale or flap of tissue called an indusium.
What structures are housed in the sorus?
The reproductive structures are known as spores and are kept within sporangia which are housed within a sorus (plural sori). The sori, which can often be seen as lots of little spots on the underside of fronds, are often protected by thin layer of tissue known as the indusium.
What parts of a fern are diploid?
In the fern and flowering plant, the entire leaf-bearing plant is diploid. The haploid gametophye of a fern is reduced to a small, heart-shaped prothallus.
What is the function of sorus?
Sori are clusters of sporangia found only in ferns (singular: sorus). This is a specialized outgrowth of the leaf that functions in protection of the sporangia. This often has the shape of an upside down umbrella and shrivels before the spores are released.
What are the types of sporophyll?
A sporophyll is a leaf that bears sporangia. Both microphylls and megaphylls can be sporophylls. In heterosporous plants, sporophylls (whether they are microphylls or megaphylls) bear either megasporangia and thus are called megasporophylls, or microsporangia and are called microsporophylls.
What is sporophyll give example?
(v) Sporophyll – It is a leaf that bears sporangia. They may be microsporophyll or megasporophyll. Sporophyll aggregate to form cones or strobili. Example: Sporophyll of fern, Microsporophyll and megasporophyll of Selaginella.
What is Gradate sorus?
gradate sorus A type of sorus (or group of sporangia) in ferns (e.g. in Hymenophyllaceae), in which there is a sequence of development of ripe sporangia from apex to base of the sorus.
Where would you find a sorus?
Sorus, plural sori, in botany, brownish or yellowish cluster of spore-producing structures (sporangia) usually located on the lower surface of fern leaves. A sorus may be protected during development by a scale or flap of tissue called an indusium.
What kind of structure is a sorus plant?
The underside of a fertile frond of Dicksonia antarctica. Each circular brown structure is an individual sorus. A sorus (pl. sori) is a cluster of sporangia (structures producing and containing spores) in ferns and fungi.
What kind of cells are in a sorus?
plant: Class Polypodiopsida. …of the patches (called a sorus) is composed of many sporangia, or spore cases, which are joined by a stalk to the sporophyll. The spore case is flattened, with a layer of sterile, or nonfertile, cells surrounding the spore mother cells.
Where does the word sorus come from in fungi?
A sorus (pl. sori) is a cluster of sporangia (structures producing and containing spores) in ferns and fungi. This New Latin word is from Ancient Greek σωρός (sōrós ‘stack, pile, heap’). In lichens and other fungi, the sorus is surrounded by an external layer. In some red algae it may take the form of a depression into the thallus.