Question

Name the terrestrial species of oedogonium

Answer 1

The present paper deals with the descriptions of two new terrestrial species of Oedogonium LINK(Oedogonium angensis sp. nova and Oedogonium dasii sp. nova) collected from moist soil of Munger, Bihar, India. The former species is macrandrous and monoecious, whereas the latter species is macrandrous and dioecious.

Answer 2

Species of oedogonium are divided into 2 major group

• Macrandous species : In this species Macrandous Species – In these species, antheridia are borne on filaments of normal size. This group is further subdivided into:    

                  * Macrandous Monoecious – In these species, antheridia and             oogonia are found on the same filament. E.g.: O. nodulosum and O. fragile

                  *  Macrandous Dioecious – In these species, antheridia and oogonia are borne on different filaments. Although filaments bearing antheridia and oogonia are morphologically similar, they differ physiologically. E.g.: O. crassum and O. aquaticum

• Nannandrous Species – In nannandrous species, filaments bearing antheridia and oogonia show morphological distinction. The male filament, which are much smaller than the female filament, is called a dwarf male or nannandrium. Nannandrous species are always dioecious, i.e., antheridia and oogonia are borne on different filaments. The small male filaments are likely to be attached to a female filament, near an oogonium