Does Marchantia have Archegonium?
Marchantia polymorpha is a dioecious species having male and female organs on different thalli. Female and male gametangia, known as the ‘archegonium’ (plural: archegonia) and ‘antheridium’ (plural: antheridia), are produced on the umbrella-like sexual branches of the female and male thalli, respectively.
How can you tell riccia and Marchantia?
Both Riccia and Marchantia belong to the same order, Marchantiales….Genus Marchantia.
| Riccia | Marchantia |
|---|---|
| Characteristic feature | |
| The characteristic feature of the Riccia plant is a rosette-like thallus. | The characteristic feature of the Marchantia plant is the presence of gemmae cups and barrel-shaped pores. |
| Sporophyte |
Where are archegonia located on Archegoniophore?
Archegoniophores and egg cell, antheridiophores and sperms female side: the archegonia are located at the lower side of the archegoniophore bevinden zich de archegonia. Each archegonium produces a single egg cell.
How do the positions of the archegonium and antheridium relate?
How do the positions of the archegonium and antheridium relate to their reproductive function? Antheridia need to disperse sperm and are upright with pores on top of the antheridial disk; archegonia are protected under the surface of the archegonial disk.
Which type of scales are present in Marchantia?
The scales are membranous, one-layered thick, usually violet in colour due to the presence of anthocyanin pigments. MorphologicaUy, the scales are of two types — appendiculate and ligulate (Fig. 6.10D & E).
What is difference between Funaria and Marchantia?
The main plant body of Marchantia is haploid but that of Funaria is diploid. In Marchantia the sporophyte is not distinguished into foot, seta and capsule unlike Funaria. In Marchantia spores develop into adult gametophyte but in Funaria they develop into a juvenile filamentous gametophyte.
What are the characteristics of Riccia?
It is the only aquatic species of Riccia….
- Gametophytic plant body is thalloid, prostrate, linear or ribbon-shaped and flattened structure.
- It is dichotomously branched (Fig.
- Thallus is thick in the middle and becomes thin towards the margins.
- An apical notch is present on the terminal portion of thallus.
What are the classification of Marchantia?
MarchantialesMarchantia / Order
How many types of scales are present in Marchantia?
two types
6.9B). The scales are membranous, one-layered thick, usually violet in colour due to the presence of anthocyanin pigments. MorphologicaUy, the scales are of two types — appendiculate and ligulate (Fig. 6.10D & E).
Where are the archegonia situated in Marchantia?
Archegonia (A) are located on the lower surface of the archegoniophore. These archegonia contain zygotes. The sporophyte is located on the ventral surface of the archegoniophore. The sporangium is not lowered a great deal because it is already pointing down toward to thallus.
What is the function of the archegonium and antheridium in Marchantia?
Therefore, both antheridium and archegonium are haploid. Their main function is to produce gametes. Ultimately, the fertilization of haploid gametes gives rise to the diploid zygote, which in turn develops into the sporophyte.
Why should the archegonia and antheridia be next to each other?
Getting sperm to egg Once an antheridium has matured and contains viable sperm, the sperm need to get to the eggs in archegonia. The first step for the sperm to get out of the antheridia and the second is to then travel to the archegonia and fertilize the eggs within. Water is essential for both steps.
Is Funaria dioecious or Monoecious?
Funaria is monoecious and autoecious i.e., male and female reproductive structures develop on different branches of the same plant. Monoecious means both male and female sex organs are borne on the same plant body.
Is Riccia a Marchantia?
Marchantia and Riccia are two genera of liverworts. Both belong to the order Marchantiales under the division Marchantiophyta.
Which type of scales is present in Riccia?
Scales in Riccia are ligulate.