What is the specialized structure of Marsilea?
What is the specialized structure of Marsilea?
Marsilea is a heterosporous fern. It produces two types of spores i.e., the microspores and the megaspores. The microspores and megaspores are produced in microsporangia and megasporangia, respectively, and the sporangia are enclosed in special bean-shaped structures called sporocarps.
What are the characteristics of Marsilea?
Features of Marsilea (With Diagram)
- Plant body (Fig.
- 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.
- Rhizome is divisible into nodes and internodes.
Which type of stele is present in stem of Marsilea?
amphiphloic solenostelic
aegyptiaca). The stele is amphiphloic solenostelic which occupies the centre of the rhizome. Xylem occurs in the form of a ring and is surrounded on either side by phloem. The central part of the stele is occupied by pith which is parenchymatous in aquatic species and sclerenchymatous in xerophytic species (e.g., M.
What is sporocarp of 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.
Is Marsilea a Pteridophyte?
Marsilea is a genus of approximately 65 species of aquatic ferns of the family Marsileaceae. The name honours Italian naturalist Luigi Ferdinando Marsili (1656–1730). These small plants are of unusual appearance and do not resemble common ferns….
| Marsilea | |
|---|---|
| Genus: | Marsilea L. |
| Species | |
| show List | |
| Synonyms |
What comes out of Marsilea Sporocarp after dehiscence?
Spore producing organs: Marsilea is heterosporous i. e., it produce two types of spores—microspores and megaspores. These spores are produced in microsporangia and megasporangia, respectively. These sporangia are borne in special type of spore producing organ called sporocarp.
What is the use of Marsilea?
Uses. In some places it has been used as food for more than 3000 years. The plant is said to be anti-inflammatory, diuretic, depurative, febrifuge and refrigerant. It is also used to treat snakebite and applied to abscesses.
Is marsilea Crenata edible?
As food. Sporocarps of some Australian species such as Marsilea drummondii are edible and have been eaten by Aborigines and early white settlers, who knew it under the name ngardu or nardoo. The leaves of Marsilea crenata are part of the East Javanese cuisine of Indonesia, especially in the city of Surabaya.
What are the types of stele?
There are usually three basic types of protostele:
- haplostele – consisting of a cylindrical core of xylem surrounded by a ring of phloem.
- actinostele – a variation of the protostele in which the core is lobed or fluted.
Is the example of Heterospory?
Heterospory is the phenomenon of formation of two types of spores, i.e., smaller microspore and larger megaspore. Examples of heterospory are Selaginella, Salvinia and Marsilea, etc.
Is present at the Centre of Marsilea rhizome?
The stele is amphipholic siphonostele, i.e., xylem is surrounded on both the sides by the phloem, and in the centre there is present the pith (Figs.
What kind of plant body does Marsilea have?
The sporophytic plant body of Marsilea shows differentiation of stem, leaves and roots (Fig. 7.116). 1. Stem: The stem is long, slender and freely-branched rhizome of indefinite growth that grows on or just below the soil surface. It is differentiated into nodes and internodes.
What is the shape of the petiole of a Begonia?
The petiole in cross section is circular in shape (Fig. 2). The epidermis has a single layer of cells covered by a thick cuticle.
What are the male and female parts of a Begonia?
Parts of a Begonia Flower. A begonia flower is monoecious, meaning it contains both male (staminate) and female (pistillate) parts.
Can a Begonia be grown from stem cuttings?
The cane type begonia are also easily propagated from stem cuttings (terminal stem cuttings, single node cuttings, and multiple node cuttings). As with many other foliage plant crops, a few firms have emerged as propagation specialists, rooting the leaf cuttings and selling established plugs to plant finishers.