Les lichens, bryophytes, pteridophytes et phanerogames aquatiques a. The pteridophytes occupy the intermediate position in between the bryophytes on one hand and the phanerogams on the other. Les pteridophytes sont les seuls cryptogames vasculaires. Status of pteridophytes india 500 species of ferns and 100 species of fern allies other than the order of fillicales are on record from india pteridophytic flora of india comprises of 67 families, 191 genera and more than species including 47 endemic indian ferns, and 414 species of pteridophytes 219 at risk, of which 160. International research botany group 2017 international. Histoire des plantes terrestres et le succes des plantes a fleurs. Pteridophytes pteridophytes is a general term for the vascular, free. Pdf les lichens, bryophytes, pteridophytes et phanerogames. The plant list includes 46,428 scientific plant names of species rank for the pteridophytes. Ce sont des cryptogames vasculaires a lorigine dune lignee evolutive fig. The modern classification of pteridophytes have been suggested by many scientist according to the sporne1975 pteridophytes have been classified into six classes. Les pteridophytes sont des plantescryptogames vasculaires sans fleurs comprenant des fougeres, des preles, des lycopodes et des selaginelles. Apparition et evolution des vegetaux au cours des temps geologiques.
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. T find, read and cite all the research you need on researchgate. They also constituted an important food source for terrestrial animals. Lellinger, 1997 lycophyta lycopodiaceae terrestrial or epiphytic. Pteridophytes introduction, authors and addresses, systematic list, glossary, and key to tribes. Dec 05, 2016 pteridophytes are vascular plants and have leaves known as fronds, roots and sometimes true stems, and tree ferns have full trunks. Seed plants include the angiosperms, the conifers, and a smaller assortment of other plants. May 05, 2014 projet video youtube sur les pteridophytes marcandre cote et sandra elseikali version corrige. Useful notes on the classification of pteridophytes. Terrestrial pteridophytes as indicators of a forestlike. Most botanists consider bryophytes liverworts, hornworts and mosses and basal pteridophytes to be the oldest living remnants of the eukaryotic plants that colonized the land.
Species of pteridophytes contained within the plant list belong to 35 plant families and 568 plant genera. What is the evolutionary importance of pteridophytes. They are psilopsida, psilotopsida, lycopsida, sphenopsida, pteropsida and progymnospermopsida. Unlike the ferns, which are a highly successful, flourishing group, the fern allies as we call the other pteridophytes are virtually living fossils. The printed version, however, was effectively published on 6 june 20.
Find, read and cite all the research you need on researchgate. Pteridophytes biology encyclopedia plant, body, different. Examples include ferns, h slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Pteridophytes may represent the closest living relatives sister group to the seed plants. Pteridophyte definition of pteridophyte by the free dictionary. Pteridophytes constitute a significant and important group in the plant kingdom. The term pteridophyte refers to vascular plants with independent gametophytes and motile sperm that are usually classified into 4 divisions that comprise nearly 40 families. A pteridophyte is a vascular plant with xylem and phloem that disperses spores. The plant list includes a further 3,533 scientific plant names of infraspecific rank for the pteridophytes. Pteridophytes of moorea, french polynesia, with a new species tmesipteris gracilis. Some pteridophytes are aquatic marselia, azolla and some are epiphytes ophioglossum pendulum. Because they produce neither flowers nor seeds, they are referred to as cryptogams. Fronds in the largest species of ferns can reach some six metres in length. Bryophytes and seedless vascular plants except ferns lab atlas chapters 6 and 7 clade.
It is the simplest and most primitive type of protostele consisting of a central solid and smooth core of xylem sur rounded by a ring of phloem fig. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as cryptogams, meaning that their means of reproduction is hidden. The body of the sporophyte is well differentiated into roots, stem and leaves. The most characteristic feature of the pteridophytes is the presence. We will be looking at several phyla in this clade, starting with the most primitive this group are all seedless. Any of numerous vascular plants that reproduce by means of spores rather than seeds, including the ferns and related plants such as horsetails, and. This pdf version does not have an isbn or issn and is not therefore effectively published melbourne code, art. 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. 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. Mar 08, 2016 the pteridophytes are found in cool, damp, shady places though some may flourish well in sandysoil conditions. Pteridophytes ferns and fern allies the plant list. Biologie vegetale les pteridophytes botanique youtube. Pteridophytes are cryptogamic plants, meaning that they are flowerless and seedless.
Pteridophyta in the broad interpretation of the term are vascular plants that reproduce via spores. Sur les i 300 arbres forestiers, seuls 164 ont ete retenus, auxquels il faut rajouter les 35 especes proposees par le c. Pdf on jun 28, 2017, ainane tarik and others published qualite, securite et environnement. The better known pteridophytes are ferns and maidenhair, from the filicinae filicopsida group, and selaginellas, mosslike plants from the lycopodinae group lycopsida. Terrestrial pteridophytes as indicators of a forestlike environment in rubber production systems in the lowlands of jambi, sumatra h. 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. 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. Pteridophyte definition of pteridophyte by merriamwebster. Exploring the utility of three plastid loci for biocoding the filmy ferns hymenophyllaceae of moorea. Les pteridophytes sont des plantes vasculaires presentant xyleme et phloeme ne produisant ni fleurs ni graines.
However, in pteridophytes, the main plant body is a sporophyte which is differentiated into true root, stem and leaves. During this period several species were recorded for the first time in the country bringing the number of species currently known for the region to 112. As the first tracheophytes, pteridophytes were also the first plants to extensively colonize the terrestrial environment, forming forests. Plant kingdom thallophytes algae bryophytes pteridophytes. Voila je suis actuellement entrain detudier les pteridophytes et dans mon cours il ny a quasi aucune reference a leur plan dorganisation. Les pteridophytes sont des plantes vasculaires presentant xyleme et phloeme ne produisant. The season during which the sur vey was carried out was unfortunately a very dry one and the lowveld and lubombo region still remain poorly known. A good portion of the image references used here tap fine image resources for nonflowering vascular plants.
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. You may recall that in bryophytes the dominant phase in the life cycle is the gametophytic plant body. Wd r p d ulr s v lg d f h d h j 0 d g d j d v f d u wur. This fern life cycle is representative of all pteridophytes. Pdf on jan 1, 2008, jacques haury and others published les lichens, bryophytes, pteridophytes et phanerogames aquatiques. Bryophytes and seedless vascular plants except ferns. Read the introductory remarks and list of characteristics of the bryophytes p.
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