Pteridophyte definition of pteridophyte by merriamwebster. Dec 05, 2016 pteridophytes are vascular plants and have leaves known as fronds, roots and sometimes true stems, and tree ferns have full trunks. Pteridophytes are the most advanced seedless group true leaves with branched veins sporophyte is dominant. 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. Apospory in pteridophytes pdf the investigations in pteridophytes probably of most interest and importance ing of apogamy and apospory, it is important to define these terms at the. Sometimes deviation in the regular alternation if generations. Ebook botany for degree pteridophyta as pdf download portable. Studies in apospory and apogamy in ferns annals of botany. Some pteridophytes are aquatic and some are epiphytes.
Pteridophytes ferns and lycophytes are freesporing vascular plants that have a life cycle with alternating, freeliving gametophyte and sporophyte phases that are independent at maturity. The sporophyte is the conspicuous and familiar plant body. This pdf version does not have an isbn or issn and is not therefore effectively published melbourne code, art. Pteridophyte definition of pteridophyte by the free. A few pteridophytes are aquatic while still others are epiphytes. Rakesh jena rated it it was ok feb 24, free pdf ebooks users guide, manuals, eingh about boany pandey jain botany book pdf download ready for download search result for singh pandey jain botany book pdf download list of ebooks and manuels about singh pandey jain botany book pdf. And among the first of the plants to truly live on land were the pteridophytes. Ethnomedicinal uses of pteridophytes of kumaun himalaya upreti, et al. Later on modern biological and pharmaceutical studies were. Azolla, selaginella but a few are perennial woody tree fern e. The seminar feedback was positive and that made me more confident to be strong mind set.
The body of the sporophyte is well differentiated into roots, stem and leaves. Both apospory and apogamy are considered as the abnormalities of plant. This is made apparent by the phenomena of apogamy and apospory, cases of which have been recorded many times in pteridophytes since they were first observed in 1874. In vitro induction of apospory and apogamy, and direct field establishment of aposporous gametophytes and subsequent sporophyte. Phytochemical studies in brazilian pteridophytes soeder 1985 reported a large inventory of papers that appeared between 1966 and 1984 on the chemical constituents of pteridophytes. International research botany group 2017 international. They are basically terrestrial plants grow in moist shady cool places. Some pteridophytes are aquatic marselia, azolla and some are epiphytes ophioglossum pendulum. Pteridophyta is the most highly evolved group among the cryptogams. This author lists a total of 671 references, but only one work had been carried out in brazil miraglia et al. Pteridophytes are used by the physicians in unani system of medicine uddin et al.
Stelar evolution in pteridophytes ppt types of steles and its evolution in pteridophytes ppt what is stele. Stelar evolution of pteridophytes sporangial organization. A pteridophyte is a vascular plant with xylem and phloem that disperses spores. Besides having various medicinal properties, the pteridophytes are also employed for a variety of commercial and environmental purposes. They are psilopsida, psilotopsida, lycopsida, sphenopsida, pteropsida and progymnospermopsida. Ebook botany for degree pteridophyta as pdf download. Pdf laboratoryinduced apogamy and apospory in ceratopteris. Ethnomedicinal uses of pteridophytes of kumaon himalaya. Efficient induction of apospory and apogamy in vitro in. Obligate apospory also occurs in ferns 4, albeit rarely 3.
Both apospory and apogamy are considered as the abnormalities of plant life cycle. Ferns, horsetails often treated as ferns, and lycophytes clubmosses, spikemosses, and quillworts are all pteridophytes. Apospory is the development of gametophyte directly from sporophyte without formation of spores. 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. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Botany for degree pteridophyta top results of your surfing botany for degree 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. Firstly all the botanists divided the plant kingdom into two large groups cryptogamia and phanerogamia, linnaeus 1754 used the term cryptogams for the first time for those plants which did not possess visible sex organs. Apogamy is a type of plant reproduction in which sporophyte diploid phase is produced from the gametophyte haploid phase without fertilization. Some pteridophytes of medicinal importance from rajasthan.
Pteridophytes introduction, authors and addresses, systematic list, glossary, and key to tribes. In apospory, a filamentous or chordate gametophyte may be formed from one or more vegetative cells of the sporophyte. In 1880, the cryptogams of the plant kingdom were divided. 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. However, the pteridophytes differ from mosses and seed plants in that both generations are independent and freeliving. Characteristics of pteridophytes, morphology of pteridophytes, reproduction of pteridophytes, homosporous and heterosporous pteridophytes, megaspore and microspores, gametophytes of pteridophytes, fertilization, zygote and embryo. The entire plant of this species is used as medicine in ayurveda, sidha and unani. In addition to the normal life cycle using meiosis to. Phytochemical studies in pteridophytes growing in brazil.
Pteridophytes of moorea, french polynesia, with a new species tmesipteris gracilis. Download objective type questions of pteridophyta pdf visit our pdf store. Apospory definition of apospory by the free dictionary. As they produce neither flowers nor seeds, they are referred to as cryptogams. The homosporous pteridophytes constitute the lowest sub. Pteridophyta objective type questions pdf download. The printed version, however, was effectively published on 6 june 20. 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. The pteridophytes are an economically important group of plants. Heterosporous megaspores important in species identifications and gametophyte development is endosporic. Jul 28, 2006 in vitro induction of apospory and apogamy, and direct field establishment of aposporous gametophytes and subsequent sporophyte development has been accomplished. Pteridophyta characteristics, life cycle, classification. A concept based exclusive material pteridophytes, gymnosperms. In its farina it produces the cytotoxic and anticancer compound dihydrochalcone.
Pteridophyte definition of pteridophyte by the free dictionary. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as cryptogams, meaning that their means of reproduction is hidden. The empirical basis of botanical systematics has been broadened far beyond the realm of macromorphological traits on which systematists have based their decisions for more than 200 years. Pteridophyta teridafata os made from two greek roots that mean winged pteryz. 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. Pteridophytes may represent the closest living relatives sister group to the seed plants. Ferns are a natural group of plants coming under the major division. Read the introductory remarks and list of characteristics of the bryophytes p. Life cycles of lycopodium, selaginella, equisetum, adiantum and marsilea. Jan 23, 2017 occurence most of the pteridophytes are terrestrial and grow in moist and shady places while some flourish well in open, dry places especially in xeric conditions selaginella lepidophylla. Any of numerous vascular plants that reproduce by means of spores rather than seeds, including the ferns and related plants such as horsetails, and. What are euphylls and how did they most likely evolve. Pteridophytes constitute a significant and important group in the plant kingdom. Similar to the life cycle of seed plants, the pteridophytes also involves the alternation of generations in its life cycle.
Pteridophytes is first in our country and i am sure, participants have grabbed the ideas from the seminar. In the present article an attempt has been made to compile the information on various medicinal uses of sixteen commonly available pteridophytes of rajasthan. The sexuality of pteridophytic gametophytes can be classified as follows. In ferns, seedless vascular plants of the monilophyte clade, both generations are free living. Pteridophytes or pteridophyta, in the broad interpretation of the term, are vascular plants plants with xylem and phloem that reproduce and disperse via spores. Pteridophytes general characters ppt general characteristics, life cycle and reproduction of pteridophytes ppt what are pteridophytes. Pteridophytes are vascular plants and have leaves known as fronds, roots and sometimes true stems, and tree ferns have full trunks. Sumita, assistant professor, department of botany, pggc11, chandigarh.
Stelar theory, components of stele, different types of steles in plants, protostele. In this lesson, well discover the characteristics, classification, and life cycle of the group pteridophyta, which includes plant species like ferns and horsetails. In addition, in pteridophytes, the gametophyte is often very thin and can be unistratose, especially at the margins yatskievych, 2003. The modern classification of pteridophytes have been suggested by many scientist according to the sporne1975 pteridophytes have been classified into six classes. The effects of sugars and ethylene on apospory and regeneration. Various animals use the fronds as food while birds and small creatures use the plants for cover. Observations on a singular development in the ladyfern.
Exploring the utility of three plastid loci for biocoding the filmy ferns hymenophyllaceae of moorea. Some of the most important characters of pteridophytes are as follows. Some of the characters of pteridophytes are as follows. Rakesh jena rated it it was ok feb 24, free pdf ebooks users guide, manuals, eingh about boany pandey jain botany book pdf download ready for download search result for singh pandey jain botany book pdf download list of ebooks and manuels about singh pandey jain botany book pdf download enter search terms. Apogamy, apospory, and parthenogenesis in the pteridophytes. Some other uses are ferns provide natural vegetation thats important to both wildlife and birds. Studies in apospory and apogamy in ferns, annals of botany, volume os21. The different species of selaginella are grown as the garden plants. With the commencement of monsoon about mid june, the ferns and fernallies start growing vigourously and luxuriantly.
Therefore pteridophytes are no longer considered to form a valid taxon, but the term is still used as an informal way to refer to ferns, horsetails, clubmosses and whisk ferns. In chinese system of medicine, many pteridophytes are prescribed by local doctors kimura and noro, 1965. Apogamy is the development of a sporophyte directly from the gametophyte without the intermediate formation and fertilization of gametes. International research botany group 2017 international botany project international research botany group international botany project non profit research institute research service botanical team recycled paper free for members of international equisetological association. Most of the pteridophytes ferns and fernallies show their luxuriant and vigorous growth during the rainy season particularly in the hilly regions usually above 1400 m altitude. M kinetin kn showed earlier development and produced higher numbers of aposporous. Useful notes on the classification of pteridophytes. The investigations in pteridophytes probably of most interest and importance ing of apogamy and apospory, it is important to define these terms at the outset. Most pteridophytes are terrestrial and grow in moist and shady places while some flourish well in open, dry places especially in xeric conditions. Apospory formation of gametophytes without meiosis chapter 14. Apogamy, apospory, and parthenogenesis in the pteridophytes w. Pteridophyta mcq multiple choice question and answer pteridophyta mcq with detailed explanation for interview, entrance and competitive exams.
Pteridophytes biology encyclopedia plant, body, different. Ebook an introduction to pteridophyta as pdf download. What is apogamy and apospory biology plant growth and. The development of a gametophyte directly from a sporophyte without the occurrence of meiosis or spore formation. Furthermore, in hymenophyllous ferns, the sporophyte is. Seed plants include the angiosperms, the conifers, and a smaller assortment of other plants. Unlike apogamy, apospory is of sporadic occurrence in nature and only a few ferns have been shown to display this phenomenon consistently. Examples include ferns, h slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Stelar evolution of pteridophytes, sporangial organization homospory and heterospory. Pdf natural apospory is reported for the first time in pteris arglrctea t.
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