Firstly, pteridophytes are the vascular plants plants having xylem and phloem that reproduces via spores. Pteridophytes pteridophytes is a general term for the vascular, free. They have leaves, roots, stem and sometimes trunks also. Pteridophyta do not produce seeds but they produce spores. According to one school of thought, the pteridophytes like bryophytes have been evolved from algae.
International research botany group 2017 international. Looks like your computer is running a operating system we no longer support, but you can still download and play your games using an older version of origin. Pteridophytes provide clues to evolution of roots and leaves 1. Some pteridophytes are aquatic and some are epiphytes.
Pteridophytes general characters and life cycle of ferns email. View and download powerpoint presentations on pteridophytes ppt. The plant body can be divided into a true root, stem, and leaves. Pteridophytes constitute a significant and important group in the plant. Observe and identify plants in the extracurricular practice. Most pteridophytes are terrestrial plants and thrive well in abundant moisture and shade while some flourish well in open, dry situations especially in xeric conditions. Because they produce neither flowers nor seeds, they are referred to as cryptogams. The printed version, however, was effectively published on 6 june 20. Some of the characters of pteridophytes are as follows. Pteridophytes are a group of primitive land plants belongs to the cryptogams. The modern classification of pteridophytes have been suggested by many scientist according to the sporne1975 pteridophytes have been classified into six classes. Some of the species belonging to this division have small leaves called as the microphylls. Botanically, say a thousand years ago, these were wild and many of them were weeds. Pteridophytes general characters ppt general characteristics, life cycle and reproduction of pteridophytes ppt what are pteridophytes.
Find powerpoint presentations and slides using the power of, find free presentations research about pteridophytes ppt. A few pteridophytes are aquatic while still others are epiphytes. They are psilopsida, psilotopsida, lycopsida, sphenopsida, pteropsida and progymnospermopsida. Life forms of pteridophyta, their origin and evolution. The innhabitants of dry land are selaginella rupestris, selaginella lepidophylla, equisetum arvens etc pteridophytes shows large variation in the form, size and habit. Pteridophytes may represent the closest living relatives sister group to the seed plants. The gymnosperms is a wellillustrated comprehensive account of living and fossil plants of this group. Most pteridophytes are terrestrial and grows in moist and shady places while some flourish well in open dry places. A free platform packed with great pc games and features built to make your gaming. Gann, institute for regional conservation, 1997 personal communication or possibly native lucansky, university of florida, 1997 personal communica.
Pteridophytes general characteristics general characters of pteridophytes the vascular cryptogams pteridophytes are plants with feather like leaves. The pteridophytes are nonflowering, vascular and sporebearing plants including ferns and fernallies. Morphology of gymnosperms download ebook pdf, epub. Each of these can be divided into life forms according to a series of morphological and other characters. 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. Common pteridophytic life forms include rhizomatous herbs, rhizomatous clonal forms, epiphytic herbs, vines, shrubs, and a variety of canopy trees that achieved arborescence by gigantism, modular repetitive growth, and rhizomorphic. General characteristics of pteridophytes key points easy. Pteridophytes or pteridophyta, in the broad interpretation of the term or sensu lato, are vascular plants. Ebook an introduction to pteridophyta as pdf download.
They are the first evolved plant group with vascular tissue system for the conduction of water and food materials. Pteridophyta characteristics, life cycle, classification. Author of the morphology of pteridophytes, the morphology of gymnosperms, the morphology of angiosperms, the mysterious origin of flowering plants, the morphology of pteridophyles, morphology of gymnosperms the structure, the morphology. An introduction to pteridophyta top results of your surfing an introduction to pteridophyta start download portable document format pdf and ebooks electronic books free online rating news 20162017 is books that can provide inspiration, insight, knowledge to the reader. A pteridophyte is a vascular plant with xylem and phloem that disperses spores. Pteridophytes introduction, authors and addresses, systematic list, glossary, and key to tribes. Pteridophytes constitute a significant and important group in the plant kingdom. They form a conspicuous element of the earths vegetation and are important from evolutionary point of view as they show the evolution of vascular system and reflect the emergence of seed habitat in the plants. Pteridophyta is designed to fulfill the needs of undergraduate and postgraduate students of botany. Pteridophyta living in water are known as hydrophyte, sticking in other plants are called epiphyte and living in residue or waste of other plants are known as saprophyte. In any case, the monophyletic origin of embryophytes, and that charophyceae charophyta, especially coleochaetales andor charales, are the closest living algal relatives of land plants is agreed. These pteridophytes are indispensably integral parts of forests world over. Medicinal plants are under cultivation and cultured world over.
The biodiversity heritage library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity community. Publication date 1962 topics pteridophyta, botany morphology publisher. As in seed plants, the greatest diversity of pteridophytes is found in the tropics, with only about six hundred species adapted for life in temperate climates. The origin of the sexual organs of the pteridophyta. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as cryptogams, meaning that their means of reproduction is hidden. Seed plants include the angiosperms, the conifers, and a smaller assortment of other plants.
In some pteridophytes the sporangia develop on stems i. A few of the aquatic ferns azolla, salvinia serve as excellent biofertilizers and bioremediation agents. Ferns, horsetails often treated as ferns, and lycophytes clubmosses, spikemosses, and quillworts are all pteridophytes. There is evidence that roots evolved from subterranean portions of stems. Sporophylls the leaves that bear sporangia are known as sporophylls. Pteridophyta in the broad interpretation of the term are. Scott 1900, eames 1936, however do not trace their origin from any particular group of algae. Many pteridophytes supplement their sexual cycles with various forms of vegetative reproduction. The origin and early diversification of land plants marks an interval. Pteridophytes are mostly terrestrial sometimes growing in the moist and shady regions. Pteridophyte definition of pteridophyte by merriamwebster. The current trends in the subject are explained in a simple, lucid and understandablewriting style. Pteridophytes continued to dominate most terrestrial floras long after the origin of seed plants tables 3 and 4.
The sporophyte is the conspicuous and familiar plant body. Church 1919 is believer of polyphyletic origin of pteridophytes and proposed the theory in his essay thallasiophyta and the subaerial transmigration. Pteridophyte definition is any of a division pteridophyta of vascular plants such as a fern that have roots, stems, and leaves but lack flowers or seeds. Pteridophyta in the broad interpretation of the term are vascular plants that reproduce via spores. According to this view both the groups are parallel to each other in their origin and they are not connected phylogenetically. Most pteridophytes are terrestrial and grow in moist and shady places while some flourish well in open, dry places especially in xeric conditions.
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. This pdf version does not have an isbn or issn and is not therefore effectively published melbourne code, art. Reproduction the sporophytes reproduce by spores which are produced within sporangia. The group includes ferns, horsetails, clubmosses and whisk ferns. It is speculated that life began in the oceans, and through millions of years of evolution, life slowly adapted on to dry land. According to church, a hypothetical group of advanced marine seaweeds called thallasiophyta formed the ancestral stock for land plants both bryophytes and pteridophytes. Chapters 1 and 2 give a general account, and describe similarities and dissimilarities with pteridophytes and angiosperms.
Pteridophyta download ebook pdf, epub, tuebl, mobi. The origin of the sexual organs of the pteridophyta is an article from botanical gazette, volume 20. The following separation of the main growth forms of pteridophyta is proposed. And among the first of the plants to truly live on land were the pteridophytes. Ebook botany for degree pteridophyta as pdf download. Pteridophyte definition and meaning collins english. Many pteridophytes supplement their sexual cycles with various forms of vegetative reproduction yatskievych 2003. Open library is an open, editable library catalog, building towards a web page for every book ever published.