Table of Contents
What is the characteristics of Riccia?
The scales are multicellular and hyaline (glassy) in appearance, or violet due to the pigment anthocyanin. Rhizoids are nearly lacking in aquatic forms, but there are usually numerous unicellular rhizoids of two types on the ventral surface….
| Riccia | |
|---|---|
| Family: | Ricciaceae |
| Genus: | Riccia L., 1753 |
| Species |
How do Riccia reproduce?
The reproduction in Riccia takes place by means of (1) vegetative and (2) sexual methods. Vegetative Reproduction, By the death and decay of the older parts of the thallus, By adventitious branches, By cell division or gemma formation, By tubers, By thick apices.
Which cells are present in the capsule of Riccia along with spores?
The mature capsule is filled with spores mixed with sterile cells or elaters and opens into valves by splitting. In Bryopsida, elders are absent. Elaters are diploid, spindle-shaped, elongated, hygroscopic structures with 2 spiral bands that help to dispersal spores.
What is Riccia sporophyte?
The sporophyte of Riccia is the simplest because as it contains only capsule, both the foot and seta are absent. It consists a peripheral layer of cells constituting the capsule wall and a central mass of spore mother cell which produces spores.
Is riccia Monoecious or dioecious?
Most of the species of Riccia are Monoecious which few species are Dioecious in nature. In monoecious (or homothallic species, antheridia and archegonia are developed on same thallus eg.
What is the kingdom of riccia?
Plant
Riccia/Kingdom
Where does the sporophyte of Riccia occur?
The Sporophyte: It increases greatly in size and almost completely fills up the venter of the archegonium (Fig. 6.5B). Simultaneously, the walls of the venter divide periclinally and eventually form a two-layered calyptra around the young sporophyte.
Is Riccia Monoecious or dioecious?
What helps in nourishment of spores in Riccia Sporophyte?
In some liverworts not all spore mother cells produce spores. Instead a number of spore mother cells abort to become sterile nutritive or nurse cells which help nourish the developing spores. This happens, for example, in the thallose liverwort genera Riccia and Sphaerocarpos.
Where does the Sporophyte of Riccia occur?
Which Riccia is Monoecious?
Most of the species of Riccia are Monoecious which few species are Dioecious in nature. In monoecious (or homothallic species, antheridia and archegonia are developed on same thallus eg. R. billardiere,R.
What is the difference between Riccia and Marchantia?
Riccia and Marchantia are two plant genera of family Marchantiaceae. The key difference between Riccia and Marchantia is Riccia genus is featured by dichotomously branched rosette-like thallus while Marchantia genus is featured by barrel-shaped air pores and gemmae cups.