PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoEconomic importance of pteridophytes:
1. As food:
Similar to other plants, pteridophytes also constitute a good source of food for animals. The sporocarp of Marsilea, a water fern, is used as food by some people.
2. As medicines:
The rhizome and petioles of Dryopteris yield is used as a vermifuge drug.
3. In nitrogen fixation:
Azolla (a water fern) forms a symbiotic association with cyanobacterium and helps in the fixation of bacteria.
4. As ornamentals:
The ferns are used as ornamental plants (mainly their leaves).
5. In soil binding:
Through their growth, pteridophytes bind soil even along hill slopes, thereby preventing soil erosion.
Difference between bryophytes and pteridophytes:
Bryophytes | Pteridophytes |
| The plant body is a thalloid as it cannot be differentiated into root, stem and leaf. | The plant body can be differentiated into root, stem and leaf. |
| These plants live in both plant and water. hence, they are known as amphibians of the plant kingdom. | The pteridophytes are true land plants. |
| The vascular tissues such as xylem and phloem are absent in these plants. | The vascular tissues such as xylem and phloem are present in these plants. |
| The gametophytic phase is dominant in these plants. | The sporophytic phase is dominant in these plants. |
| The sporophytic phase of these plants is completely dependent on the gametophytic generations. | In these plants, the gametophytic generation is independent. |
| Example: Riccia, Funaria and anthoceros. | Example: Selaginella, Psilotum and Lycopodium |
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