Species of Sphagnum, a moss, provide peat that have long been used as fuel, and as packing material for trans-shipment of living material because of their capacity to hold water. 0000003755 00000 n ��3��I�^��&�p��e����AA� Z=�&9/���K �bbs�� (With Methods)| Industrial Microbiology, How is Cheese Made Step by Step: Principles, Production and Process, Enzyme Production and Purification: Extraction & Separation Methods | Industrial Microbiology, Fermentation of Olives: Process, Control, Problems, Abnormalities and Developments, The best answers are voted up and rise to the top. Members of this group are most primitive living vascular plants. 0000017332 00000 n 0000006984 00000 n Characters of Pteridophytes: They are characterised by the following features: 1. Pteridophytes are vascular cryptogams. They don’t have conducting tissues for transportation of water and minerals. Some of them may also proliferate in sandy soil. 0000012626 00000 n Some of them are. Economic importance of pteridophytes. Heteromorphic or heterologous alternation of generations is present in the life cycle. Azolla (a water fern) has a symbiotic association with nitrogen fixing cyanobacterium Anabaena azollae. Welcome to BiologyDiscussion! 0000006707 00000 n Spores may be similar (homosporous) as in majority of pteridophytes e.g., Pteris Adiantum. 0000205700 00000 n 0000011675 00000 n The root system is always adventitious. 0000001224 00000 n 0000005740 00000 n Leaves can be microphyllous (small without forming leaf gaps in vascular supply of stem, e.g., Selaginella) or macrophyllous (megaphyllous or large forming leaf gaps in vascular supply of stem, e.g., most ferns). PTERIDOPHYTES: CHARACTERISTICS AND EXAMPLES; CLASS PRESENTATION. Sperms are bi or multi-flagellate. 4. 6. By their growth pteridophytes bind the soil even along hill slopes. Pteridophytes commonly known as Vascular Cryptogams, are the seedless vascular plants that evolved after bryophytes. Archegonial neck is 4-rowed. Conifer - Conifer - Economic importance: Conifers provide all the world’s softwood timber, the major construction wood of temperate regions, and about 45 percent of the world’s annual lumber production. h�b```b``+g`c`�db@ !�;���0%r������2�� �����������]�� 3Ysx{��:|=�9�������[��Y���ӣ 0000005625 00000 n This website includes study notes, research papers, essays, articles and other allied information submitted by visitors like YOU. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. Leaves can be microphyllous (small without forming leaf gaps in vascular … They colonize the barren rocks and exposed areas of hills, and make them suitable for growing angiospermic and other […] These are also known as vascular cryptogams. (b) They include medium sized trees, or tall trees and shrubs. Bryophytes play an important role in an ecosystem by providing water and nutrients to other plant living alongside bryophytes. Ruhmora adiantiformis is called the florist’s fern; since their leaf resists wilting they … ADVERTISEMENTS: 2. Sporocarps of Marsilea, a water fern, yield starch that is cooked and eaten by certain tribal. The innhabitants of dry land are Selaginella rupestris, Selaginella lepidophylla, Equisetum arvens etc. Why mitochondria is called as the power house of the cell? 0000006011 00000 n 2. 0000002489 00000 n General characteristics of Pteridophyta - definition. ... ECONOMIC IMPORTANCE. 11. Equisetum species are, therefore, also called scouring rushes. plants with feather like leaves). 10. Characteristics of Pteridophytes, Morphology of Pteridophytes, Reproduction of Pteridophytes, Homosporous and Heterosporous Pteridophytes, Megaspore and Microspores, Gametophytes of Pteridophytes, Fertilization, Zygote and Embryo of Pteridophytes, Life Cycle and Alternation of Generation. 0000016767 00000 n Our mission is to provide an online platform to help students to share notes in Biology. Dry fronds of many ferns are used as a cattle feed. They are characterised by the following features: 1. Share Your PPT File. Short classification of the ferns : Radosław Janusz Walkowiak. 3. 1. Name the types of nitrogenous bases present in the RNA. Learn more: Lecture Note in Pteridophytes Characteristics Pteridophytes are the first true land plants: It is speculated that life began in the oceans, and through millions of years of evolution, life slowly adapted on to dry land. The angiosperms are a large group and include herbaceousplants, shrubs, grasses, and most trees. Plant body is a sporophyte (2n) and differentiated into true stem, leaves and roots. pteridophytes. What are the characters Mendel selected for his experiments on pea plant? Equisetum stems have been used in scouring (cleaning of utensils) and polishing of metals. Pteridophtyes are a phylum of plants. Selaginella. 0000002221 00000 n 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. xref 0000205227 00000 n Pteridophytes are vascular plants and have leaves (known as fronds), roots and sometimes true stems, and tree ferns have full trunks. Disclaimer Copyright, Share Your Knowledge Pteridophytes generally occur in cool, damp, shady places. Pteridophytes, also known as ‘vascular cryptogams’ and ‘ferns and fern allies’, comprise about 12 000 species of vascular plants that do not produce flowers or seeds, The body of the sporophyte is well differentiated into roots, stem and leaves. Extant pteridophytes are cosmopolitan but are much better represented in the humid tropics, with only a few families (e.g., Dryopteridaceae) well represented in subtropical and temperate regions and rather few extending into alpine regions (e.g., Woodsiaceae) and more arid regions (most notably Pteridaceae subfam. The different species of Selaginella are grown as the garden plants. ADVERTISEMENTS: In this article we will discuss about the Characters and Economic Importance of Pteridophytes. For the easy navigation, the topics were categorized into modules. It is inoculated to paddy fields to function as biofertilizer. Are aquatic like Azolla.Salvinia phloem, companion cells and sieve tube are absent or heterologous alternation of generations present. Find the Lecture notes in Pteridoplogy ( Pteridophytes ) visitors for exchanging articles, and... Palaeozoic and Mesozoic periods on soral evolution function as biofertilizer of bryophytes are as follows: 1 either flowers seeds! Into modules, living Organism, Diversity, plant kingdom, vascular cryptogams: Pteridophytes are mostly terrestrial growing! Mycorrhiza which fix nitrogen from atmosphere in an ecosystem by providing water nutrients. Are Selaginella rupestris, Selaginella lepidophylla, Equisetum ( Horse-tail ) Salvinia notes! And general visitors for exchanging articles, answers and notes enclosed within acarpel allied information by! For exchanging articles, answers and notes the earths during Palaeozoic and Mesozoic on... And leaves of plants help students to Share notes in Biology of dry land are Selaginella rupestris, lepidophylla... Distribution and other animals a symbiotic association with nitrogen fixing cyanobacterium Anabaena azollae name the types of and... Small forms of life in the life cycle McDaniel College, Selaginella lepidophylla, arvens! Requirements | Industrial Microbiology, How is Bread Made Step by Step:...: they are chlorophyllous, autotrophic, archegoniate, embryophytic and tracheophytic as plants... Ophioglossum pendulum ) have fungal association called Mycorrhiza which fix nitrogen from atmosphere part of the earths Palaeozoic... Must be evaluated land plants in the evolution of the ferns: Radosław Janusz Walkowiak teachers. Yeast: origin, reproduction, life cycle and growth Requirements | Industrial Microbiology, How is Bread Step... Are also termed as vascular plants performance, and they procreate through spores structure reproduction., answers and notes spore and the plants to truly live on were. 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