Which type of development of Sporagium is found in marsilea?
Table of Contents
Which type of development of Sporagium is found in marsilea?
leptosporangiate type
The sporophore is seen in the form of two masses on either side. The mucilage ring is present only on the dorsal side. Development of Sporangium: Sporangial development is of the leptosporangiate type.
What is sporocarp in marsilea?
THE SPOROCARP of Marsilea is a unique botanical structure. When scarified and placed in water, the sorophore contained within the sporocarp gradually expands’ into a long gelatinous column many times the length of the sporocarp.
In which plant sporocarp is found?
aquatic ferns
A sporocarp is a specialised type of structure in the aquatic ferns of the order Salviniales whose primary function is the production and release of spores.
What is sporocarp give an example?
Sporocarp definition A many-celled body produced from a fertilized archicarp, serving for the development of spores in red algae, lichens, etc. noun. 1. A similar structure in certain ferns, such as the water clovers.
What is Sporophyte in Marsilea?
The Sporophyte of Marsilea: The branches are either axillary or arising below or lateral to each leaf. Adventitious roots develop on the outer side of each node of the rhizome. The leaves are typically peltate and quadrifoliate, each with a considerably long petiole.
What are the characteristics of Marsilea?
Characteristics of marsilea
- Plant body is sporophytic and the sporophyte possesses a rhizome; having man) roots arising towards lower side and leaves towards the upper side.
- Rhizome is long, slender, well-branched and grows on or below the soil surface and may attain a length of several metres in some species.
Which sporocarp is rich source of starch?
Only the megaspores contain starch, and the tapetum is totally devoid of carbohydrate. In the maturing sporocarp, the megaspores have enlarged and possess a thick wall, and a dense deposition of carbohydrate occurs around the archegonial pore of the megaspore (Fig.
Is sporocarp present in Psilotum?
(D) Rhynia Explanation: Sporocarp is the mother cell for spores which stores and releases the spores. It is present only in aquatic ferns.
Which plant is commonly known as water fern?
Blechnum nudum, or fishbone water fern.
What is meant by Indusium?
Definition of indusium : an investing outgrowth or membrane especially : an outgrowth of a fern frond that covers the sori.
What type of leaves are found in marsilea?
The group is commonly known as the “pepperwort family” or as the “water-clover family” because the leaves of the genus Marsilea superficially resemble the leaves of a four-leaf clover (a flowering plant). In all, the family contains 3 genera and 50 to 80 species with most of those belonging to Marsilea.
How does dehiscence of marsilea Sporocarp occur?
It increases in size. Dehiscence of Sporocarp and Liberation of Spores: The decaying of the wall of the sporocarp takes place due to bacterial action and thus the sporangia and spores are liberated. The sporocarp bursts open only in water in valvecular manner along the ventral side and apex.
Where are the spores produced in ferns?
The fern life cycle 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.
What is Synangium in Psilotum?
Synangium is a trilocular or three chambered, spore bearing structure in Psilotum. It is considered as a fusion product of three sporangia. Location: axils of foliar leaves on aerial shoot. Synangium C.S: It consists of 3 chambers or locules.
Why is Azolla called water fern?
Hint: Water fern is a small free-floating water plant that forms dense mats. It was introduced for ornamental use in ponds and aquaria but its introduction into the wild has meant it has spread rapidly throughout. Complete answer: Azolla is the genus of seven species of aquatic ferns belonging to Salviniaceae.
