prothallus meaning in Hindi

Examples

1. The prothallus development is of the " Adiantum " type.
2. It has a black or bluish or greenish prothallus.
3. The prothallus is usually absent when growing on rock.
4. A rim of dark tissue ( prothallus ) may surround the edges of the lichen.
5. The prothallus is red to whitish in the inner part, red the in outer part.
6. The cordate prothallus are usually smaller with thinner midribs than that of other members of Polypodiaceae.
7. The prothallus is either absent or vestigial, with areoles sometimes being contiguous and sometimes scattered.
8. Young fern sporelings can often be found with the prothallus gametophyte still attached at the base of their fronds.
9. A thin strip of prothallus sometimes is at the outer edge, forming a narrow dark zone ( fimbriate ).
10. In ferns the gametophyte is a small flattened autotrophic prothallus on which the young sporophyte is briefly dependent for its nutrition.