Were is the sorus located on a plant?

sorus, plural sori, in botany, brownish or yellowish cluster of spore-producing structures (sporangia) usually located on the lower surface of fern leaves.

1. Where are sori usually located?
2. Are sorus located on the gametophyte or sporophyte stage of the plant?
3. What is sorus tissue?
4. What is the function of the sorus?
5. What is sori plant?
6. Where are spores located on a fern?
7. Where is the gametophyte in ferns?
8. Is gametophyte of Psilotum is photosynthetic?
9. How spores are released from a sorus in a Homosporous fern?
10. Where do fern plants grow?
11. How do ferns reproduce?
12. Which Pteridophytes are mixed sorus found?
13. Why gametophyte is called so?
14. What is Indusium botany?
15. How does offspring dispersal occur in ferns?

Where are sori usually located?

Sori (singular: sorus) are groups of sporangia (singular: sporangium), which contain spores. Sori are usually found on the underside of the blade. Young sori are commonly covered by flaps of protective tissue called indusia (singular: indusium).

Are sorus located on the gametophyte or sporophyte stage of the plant?

Sori occur on the sporophyte generation, the sporangia within producing haploid meiospores. As the sporangia mature, the indusium shrivels so that spore release is unimpeded. The sporangia then burst and release the spores.

What is sorus tissue?

Sorus tissue is the “pregnant” area at the center of the kelp blade containing the sporangia, which are cells that generate and contain the spores.

What is the function of the sorus?

Sori are clusters of sporangia found only in ferns (singular: sorus). These are a product of sexual reproduction. The sporangia within the clusters each house several haploid spores. After release from the sporangium, these spores will generate and grow into the gametophytic generation under proper conditions.

What is sori plant?

sorus, plural sori, in botany, brownish or yellowish cluster of spore-producing structures (sporangia) usually located on the lower surface of fern leaves. ... In rust and smut fungi, a sorus is a spore mass produced on the leaf of an infected plant.

Where are spores located on a fern?

In ferns, spores are contained within cases called sporangia that are located on the underside of leaves. Examples of sori and arrangements of sporangia in various species of ferns.

Where is the gametophyte in ferns?

The prothallus is the fern gametophyte. It is a green, photosynthetic structure that is one cell thick, usually heart or kidney shaped, 3–10 mm long and 2–8 mm broad. It is very difficult to find in the bush as it is so tiny.

Is gametophyte of Psilotum is photosynthetic?

The gametophyte lives underground as a saprophyte, sometimes in a mycorrhizal association. ... The gametophyte of Psilotum is unusual in that it branches dichotomously, lives underground and possesses vascular tissue. The nutrition of the gametophyte appears to be myco-heterotrophic, assisted by endophytic fungi.

How spores are released from a sorus in a Homosporous fern?

Therefore ferns are known as homosporous plants. The sporangia are usually in clusters known as sori, found on the underside of the fern leaves. ... When the spores are mature, they are released from the sporangia. If a spore lands on a suitable site, it will germinate and grow via mitosis into a mature gametophyte plant.

Where do fern plants grow?

Ecologically, the ferns are most commonly plants of shaded damp forests of both temperate and tropical zones. Some fern species grow equally well on soil and upon rocks; others are confined strictly to rocky habitats, where they occur in fissures and crevices of cliff faces, boulders, and taluses.

How do ferns reproduce?

Ferns do not flower but reproduce sexually from spores. ... Mature plants produce spores on the underside of the leaves. When these germinate they grow into small heart-shaped plants known as prothalli. Male and female cells are produced on these plants and after fertilisation occurs the adult fern begins to develop.

Which Pteridophytes are mixed sorus found?

-In Nephrolepis, mixed sorus is present because without any order of development sporangia arise.

Why gametophyte is called so?

The gametophyte is the sexual phase in the life cycle of plants and algae. It develops sex organs that produce gametes, haploid sex cells that participate in fertilization to form a diploid zygote which has a double set of chromosomes.

What is Indusium botany?

A flap of tissue that partially or completely covers each sorus in certain ferns. It is an outgrowth of the placenta. Indusia are seen on the undersur-face of the fronds of Dryopteris as lines of brown kidney-shaped outgrowths.

How does offspring dispersal occur in ferns?

The dispersal of spores in ferns (Tracheophyta) takes place through the wind. ... The wind can carry the spores a great distance to find regions not yet populated. Animals can also be responsible for the dispersal of fern spores, but this is not as common as the wind bringing spores from place to place.