What is Lycopodium gametophyte?
Gametophytes of Lycopodium digitatum A. Braun are subterranean, mycorrhizal structures. Ex- ternally, they are conical and divided into three principal regions: tapering base, ring meristem, and gametangial cap. Internally, the endobiont is restricted to specialized tissues in the base.
What type of spores do Lycopodium produce?
Lycopodium is a sporophytic plant and reproduces sexually. The plants are homosporous i.e., produces only one type of spores (without differentiation of mega- and microspores). These spores are produced in sporangia which, in turn, are produced on fertile leaves known as sporophylls.
Where does the gametophyte of Lycopodium grow?
In most cases the sporangia, like in Lycopodium, which produce identical spores, are formed on the sporophylle. This phenomenon is called homospory. These spores grow into the gametophyte on which antheridia and archegonia are formed. Also heterospory occurs in the Lycophyta, for example in Selaginella.
Are the spores in Lycopodium haploid or diploid?
Their haploid spores are produced in a club-like structure known as a strobilus. Species of Lycopodium are found on all continents (except Antarctica ) and many oceanic islands. Some species familiar to North America are the ground pine (Lycopodium obscurum), ground cedar (L. complanatum), and running clubmoss (L.
Is Lycopodium a Sporophyte or gametophyte?
Reproduction by Spores: The plant body is a sporophyte i.e., it bears spores. The spores are developed in the sporangia.
What is the division of Lycopodium?
Tracheophyta
Data Quality Indicators:
| Division | Tracheophyta – vascular plants, tracheophytes |
| Subdivision | Lycopodiophytina |
| Class | Lycopodiopsida |
| Subclass | Lycopodiidae |
| Order | Lycopodiales – clubmosses |
Which is the dominant part of the Lycopodium life cycle the Sporophyte or gametophyte?
Which is the dominant part of the Lycopodium life cycle, the sporophyte or gametophyte? Sporophyte.
Is Lycopodium gametophyte photosynthetic?
those reported for the spores of species of the Lycopodiaceae that form non- photosynthetic, mycorrhizal gametophytes. The adage that Lycopodiella spores germinate rapidly holds true for L.
Is Lycopodium a sporophyte or gametophyte?
Which is the dominant part of the Lycopodium life cycle the sporophyte or gametophyte?
What is gametophyte dominant?
The character and relative extent of the two phases vary greatly among different groups of plants and algae. Thus, the gametophyte stage is dominant in the more primitive (nonvascular) plants (bryophytes), whereas the sporophyte is the dominant phase in the life cycle of higher (i.e., vascular) plants.
Which has largest Gametophyte?
Moss
Moss has the largest gametophyte. Mosses are small, soft plants that are typically 1 -10 cm tall, some species are much larger. They commonly grow close together in clumps or mats in damp or shady locations.
Are there more than one type of gametophyte in Lycopodium?
As a result a subterranean saprophytic Clavatum type of gametophyte is formed. Hence more than one type of prothalli may occur in the same species. The gametophytic prothallus of Lycopodium is monoecious (homothallic) i.e., male (antheridia) and female (archegonia) sex organs are developed on the same prothallus.
How are the spores of a Lycopodium divisible?
Lycopodium is a homosporous pteridophyte i.e., it produces spores of equal size and shapes. The mature spores are yellow in colour. The spore wall is divisible into two layers viz., the inner wall, called the intine, and an outer layer, the exine. The exine displays ornamentation that varies with the species (Fig. 7.29).
How are sporangia and archegonia formed in the Lycopodium?
In most cases the sporangia, like in Lycopodium, which produce identical spores, are formed on the sporophylle. This phenomenon is called homospory. These spores grow into the gametophyte on which antheridia and archegonia are formed. Also heterospory occurs in the Lycophyta, for example in Selaginella.
Are there more than one type of prothalli in Lycopodium?
Hence more than one type of prothalli may occur in the same species. The gametophytic prothallus of Lycopodium is monoecious (homothallic) i.e., male (antheridia) and female (archegonia) sex organs are developed on the same prothallus.