What is the habitat of pteridophytes?
Most of the living pteridophytes are terrestrial, growing in moist and shady places. Some members are aquatic (Azolla, Marsilea, Salvinia) usually occurring in permanent ponds.
On which basis pteridophytes are classified?
On the basis of nature and the relation of leaf and the stem vascular anatomy and position of sporangia, they are classified into four main classes – Psilopsida, Lycopsida, Sphenopsida and Pteropsida.
How is pteridophytes characterized and classified?
Pteridophytes (ferns and lycophytes) are free-sporing vascular plants that have a life cycle with alternating, free-living gametophyte and sporophyte phases that are independent at maturity. The body of the sporophyte is well differentiated into roots, stem and leaves. The leaves may be microphylls or megaphylls.
What are the economic and environmental importance of pteridophytes?
Besides being a lower plant, pteridophytes are economically very important. Dry fronds of many ferns are used as a cattle feed. Pteridophytes are also used as a medicine. Aquatic pteridophyte Azolla is used as a biofertilizer.
What do you understand by the term seed habitat used in the pteridophytes explain?
The adoption of heterospory and the retention and germination of a single megaspore within megasporangium to form a female gametophyte, led to the phenomenon of “seed habit”, a characteristic feature of the spermatophytes.
How are Pteridophytes classified write in brief?
Pteridophytes are the “spore bearing vascular plants” and also called as seedless vascular plants belong to the cryptogams. Tracheophyta are further divided into four main groups : Psilopsida, Lycopsida, Sphenopsida and Pteropsida. But it is not certain whether these are divisions or classes.
What is the characteristics of Pteridophytes?
Primary characteristics of Pteridophytes are as follows: They are seedless, vascular plants that show true alternation of generations. Furthermore, the sporophyte has true roots, stems and leaves. They reproduce by spores, which are developed in sporangia. They may be homosporous or heterosporous.
Which of the following Pteridophytes belong to class Pteropsida?
-Pteris and Adiantum- Pteris belongs to the Pteropsida class and Adiantum is a member of a class called Pteropsida.
What is the ecological importance of pteridophytes?
Like other plants, pteridophytes constitute a good source of food to animals. Sporocarps of Marsilea, a water fern, yield starch that is cooked and eaten by certain tribal. (2) Soil Binding: By their growth pteridophytes bind the soil even along hill slopes.
What is the importance of pteridophytes?
Pteridophytes commonly known as Vascular Cryptogams, are the seedless vascular plants that evolved after bryophytes. Besides being a lower plant, pteridophytes are economically very important. Dry fronds of many ferns are used as a cattle feed. Pteridophytes are also used as a medicine.
What kind of habitat does a pteridophyte live in?
1 Most of the living pteridophytes are terrestrial, growing in moist and shady places. 2 Some members are aquatic ( Azolla, Marsilea, Salvinia) usually occurring in permanent ponds. 3 A few forms are xerophytic like Equisetum.
How are Bryophyta and Pteridophyta classified in botany?
Bryophyta and Pteridophyta. Engler (1909) included the Bryophyta and Pteridophyta under Embryophyta. Due to discovery of the fossil plants, the classification of Pteridophytes has undergone vast changes in the recent past.
How are pteridophytes different from other vascular plants?
Due to discovery of the fossil plants, the classification of Pteridophytes has undergone vast changes in the recent past. Older taxonomists divided the vascular plants in two divisions—Pteridophyta (primitive vascular plants with absence of seeds) and spermatophyta (presence of seeds).
What was Engler’s classification of pteridophytes in 1909?
Engler (1909) included the Bryophyta and Pteridophyta under Embryophyta. Due to discovery of the fossil plants, the classification of Pteridophytes has undergone vast changes in the recent past.