Gemmae are multicellular green structures for vegetative propagation. ...
Gemmae Cups and Gemmae in Marchantia Thallus
Gemmae Cups:
- Gemma cups are the structures in which gemmae are produced.
- These are found on the dorsal surface of the thallus of Marchantia, a liverwort plant.
- The cups are small and cup-shaped, about 2-3 mm in diameter.
- They are surrounded by a few specialized leaves called perianth, which protect the gemmae from desiccation and other environmental stresses.
Gemmae:
- Gemmae are small, multicellular green structures that are produced asexually for vegetative propagation.
- They are about 0.3-0.5 mm in diameter and contain a small number of cells.
- Each gemma is capable of producing a new plant when it lands on a suitable substrate and germinates.
Vegetative Propagation:
- Vegetative propagation is the process of producing new plants from vegetative parts of a parent plant, such as roots, stems, and leaves.
- Gemmae are one of the methods of vegetative propagation used by liverworts and some other plants.
Marchantia Thallus:
- Marchantia is a genus of liverwort plants that are commonly found in damp, shady habitats worldwide.
- The thallus of Marchantia is the plant body that lacks true roots, stems, and leaves.
- It is a flat, lobed structure that grows on the ground or on other substrates such as rocks, soil, or tree trunks.
- The thallus is capable of photosynthesis and reproduction, and contains specialized structures such as gemma cups, antheridia, and archegonia.
Gemmae are multicellular green structures for vegetative propagation. ...
In Marchantia, the plant body consists of a dorsrventrally flattened, prostrate and dichotomously branched thallus. The thalli are conspicuous, apex of each thallus is notched. Along the midriba represent characteristic, prominent goblet or cup-shaped structures, the gemma cups, with smooth, dentate or frilled margins. These cups enclose asexual reproductive bodies called gemma.
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