In this article we will discuss about the asexual and sexual modes of reproduction in marchantia with the help of diagrams. Asexual Reproduction in Marchantia: Asexual propagules - gemmae - occur in a gemma-cup (Fig. 2.6A). On the floor of the cup are seen numerous mucilage papillae and many biconvex discoid gemmae (Fig. 2.7E). A gemma (Fig. 2.7F) is borne [...]
In this article we will discuss about the anatomy of marchantia with the help of a suitable diagram. Internally, in a cross-section (Fig. 2.7A, B) the thallus is made up of two zones; upper assimilatory and lower storage zone. The assimilatory zone is narrow, it is made up of a single layer of air chambers which enclose assimilatory filaments. Each [...]
In this article we will discuss about the sexual and asexual modes of reproduction in riccia with the help of diagrams. Sexual Reproduction in Riccia: Most of the species of Riccia are monoecious. Antheridia and archegonia occur on the same thallus. However, some species (R. curtisii and R. discolor) are dioecious. In R. curtisii two spores of a tetrad develop [...]