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Topic: Pteridophyte

In the News (Sat 28 Nov 09)

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Hugh Jackman

	BGCI - Botanic Gardens - Preserving southern Indian pteridophytes
		Pteridophytes play a vital role in tropical ecosystems, particularly in the rainforests, where it is estimated that 65% of them occur.
		This is less pronounced amongst the pteridophytes, although recent studies have shown that about 18% of the approximately 270 fern species found in southern India are endemic to the region.
		The shade- and moisture-loving pteridophytes thrive between 700 and 2,000 m altitude, their altitudinal range directly related to the amount of precipitation.
	www.bgci.org.uk /botanic_gardens/Preserving_southern_Indian_pteridophytes.html (1020 words)

	Print page (Site not responding. Last check: 2007-10-05)
		Pteridophytes (ferns and allied plants) are vascular plants reproducing from spores.
		This, in addition to the fact that (most) pteridophyte species have a subsequent necessity for available moisture to facilitate fertilisation, means that nearly all are found growing in forested habitats or other habitats where there is a greater availability of moisture year-round and where there is protection from the drying effects of sun and wind.
		It is either the forest-dwelling pteridophyte species that are naturally very rare in Tasmania, or those that are rare and restricted to forested habitats where the surrounding topography has been historically conducive to modification by man, that are at most risk of becoming extinct in the State.
	www.affa.gov.au /content/print.cfm?objectid=D2C48F86-BA1A-11A1-A2200060B0A02223&showdocs=all (708 words)

	WPC: Conservation Programs: Conservation Papers
		A mature knowledge of the pteridophyte flora and a detailed assessment of the conservation status of the pteridophytes are two essential tools requisite for action to protect at risk taxa.
		The recent publication of the pteridophyte volume of the Flora of North America (1993), a collective work by most of the specialists in the U.S., is likely to generate a broad consensus on the taxonomy of most groups.
		Pteridophytes tend to be more common in the canyons, ravines and spectacular sites commonly protected as state or national parks.
	www.wpconline.org /conservation/papers/paper_01.html (3331 words)

	Plant Diversity - Bryophytes and Pteridophytes (Site not responding. Last check: 2007-10-05)
		The gametophyte form of bryophytes, pteridophytes and gymnosperms all produce their gametes within multicellular organs (gametangia).
		Be able to describe the similarity and difference between bryophytes and pteridophytes.
		View living and preserved specimens from the remaining bryophyte and pteridophyte phyla (Hepatophyta, Lycophyta) and other specimens of the Phylum Pterophyta (whisk fern and horsetail).
	biology.dbs.umt.edu /biol103/labs/Wyrick/10a_plant_diversity_bryophyte_pteridophyte.htm (1127 words)

	Mycorrhizal Citations (Site not responding. Last check: 2007-10-05)
		Forty-five percent of the Hawaiian pteridophyte flora were examined for mycorrhizae.
		Mycorrhizae were present in 83% of terricolous species, in 86% of epilithic species, in 55% of epiphytic species, and absent from aquatic species.
		A phylogram of pteridophyte families is constructed incorporating the intensity of mycorrhizal colonization as one criterion for classification.
	mycorrhiza.ag.utk.edu /latest/1992/92_gemma1.htm (87 words)

	The Pteridophyte Clade (Site not responding. Last check: 2007-10-05)
		In the Pteridophyte clade and its sister group, the Spermatophytes, all sporangia are terminal or positions derived from a terminal position, i.e., marginal on leaves (Fig.
		The major groupings within the Pteridophyte clade are the Horsetails, a group with tremendous fossil diversity, but only one extant genus, the Whisk Ferns, a small group with only two genera that were once thought to be direct descendants of early land plants, and the Ferns, using that term in the broadest sense.
		However, in the case of the Horsetails, the fossil record suggests the Horsetail lineage is as old as the Ferns and is a distinct lineage.
	www.bio.ilstu.edu /Armstrong/syllabi/222book/chapt9.htm (9122 words)

	Mycorrhizal Citations (Site not responding. Last check: 2007-10-05)
		The arbuscular mycorrhizas of pteridophytes in Yunnan, southwest China: evolutionary interpretations.
		The percentage of arbuscular mycorrhizal pteridophytes among 256 pteridophyte species distributed in Yunnan (southwest China) was found to be lower than that in angiosperms.
		In the pteridophytes, the occurrence of arbuscular mycorrhizas was low in sporophytes of fern-allies and leptosporangiates, whereas in the eusporangiates it was relatively high.
	mycorrhiza.ag.utk.edu /latest/latest01/01_1zhao1.htm (94 words)

	Untitled Document (Site not responding. Last check: 2007-10-05)
		Local variation in individual density, species composition, species richness and species diversity of terrestrial pteridophytes were studied at four sites in the tropical lowland rain forest of western Amazonia.
		15 568 pteridophyte individuals representing 40 species were recorded in four plots.
		The variability among subplots within the same plot was considerable in all the characteristics measured (number of individuals, number of species, species diversity); the square 1-ha plot was more homogeneous in these respects than any of the three 5 m by 1300m transects.
	www.sci.utu.fi /amazon/The_team/Publications/individual_publications/Tuomisto_&_Poulsen_2000_JVS.htm (227 words)

	Yatskievych, George* and Elisabeth A. Hooper. (Site not responding. Last check: 2007-10-05)
		A surprisingly large number of pteridophytes are able to meet the challenges of life in arid and seasonally dry habitats.
		This symposium will explore some of the structural, physiological, ecological, genetic, and other life-history adaptations of ferns and fern allies growing in regions where moisture deficit and high solar irradiation are part of a syndrome of factors providing strong selection pressures on evolution of the local flora.
		Studies on pteridophyte responses to aridity are still an emerging field of study, so the symposium will reflect future research needs as much as summarizing present knowledge of selected topics.
	www.botany2001.org /sympos10/abstracts/5.shtml (148 words)

	pteridophyte -- Encyclopædia Britannica (Site not responding. Last check: 2007-10-05)
		The name pteridophyte, no longer used in systematic taxonomy, is derived from Greek words meaning feather plant.
		A homosporous life history occurs in nearly all bryophytes and in most pteridophytes.
		It is characterized by morphologically identical spores that germinate to produce bisexual (both male and female) gametophytes in pteridophytes, but either bisexual or more usually unisexual (either male or female) gametophytes in bryophytes.
	www.britannica.com /eb/article-9061749 (379 words)

	Nuclear DNA C-values in 30 Species Double the Familial Representation in Pteridophytes -- OBERMAYER et al. 90 (2): 209 ...
		Flow histograms of fluorescence intensity in nuclei isolated from pteridophytes and the relevant calibration standard after propidium iodide staining.
		Pteridophyte phylogeny (left, based on Pryer et al., 2001) and C-value data (right) showing the mean and range of C-values in each of the major branches of the phylogeny.
		Studies on the cytology and phylogeny of the pteridophytes VII.
	aob.oxfordjournals.org /cgi/content/full/90/2/209 (3275 words)

	Cox, Patricia B. (Site not responding. Last check: 2007-10-05)
		As a component of the All Taxa Biodiversity Inventory in the Great Smoky Mountain National Park, a re-evaluation of the pteridophyte flora is being undertaken.
		In addition to the inventory of species, we are also mapping the distribution of ferns in the park.
		Currently there are 64 species of pteridophytes reported from the GSMP.
	www.botany2001.org /section11/abstracts/12.shtml (190 words)

	Pteridophytes - Introduction (Site not responding. Last check: 2007-10-05)
		The sporophyte was the dominant phase of the life cycle of these early Pteridophytes.
		Unlike the Bryophytes, these plants are in the mainstream of land plant evolution and eventually gave rise to the seed plants.
		In all Pteridophytes the dominant plant is the sporophyte (brown below) with the gametophyte (blue below) short-lived.
	scitec.uwichill.edu.bb /bcs/bl14apl/pter1.htm (723 words)

	FERNS - CURRENT BIODIVERSITY (Site not responding. Last check: 2007-10-05)
		This is more diverse than the pteridophyte flora of such floristically complex areas as Essex County in the Carolinian Zone of southwestern Ontario (30 species - Botham 1981) or the Ottawa District of southeastern Ontario/ southwestern Quebec (45 species - adapted from Cody 1978).
		Pteridophytes in the Mixedwood Plains Ecozone are typically small to moderate-sized plants which do not play a major role in the ecological processes governing major habitats.
		The populations of various pteridophyte species in the Mixedwood Plains Ecozone has been dramatically reduced by direct and indirect human impact since the mid 18th century.
	www.naturewatch.ca /MixedWood/ferns/ferns3.htm (658 words)

	Atlas of the pteridophytes of Luxembourg (Site not responding. Last check: 2007-10-05)
		Over the last few years, the study of the pteridophytes of Luxembourg was relaunched, and the existing information deficiencies are progressively reduced.
		Despite the small territory of the Grand-Duchy of Luxembourg, the diversity of pteridophytes is remarkable.
		Not less than 62 pteridophytes (species, subspecies, nothosubspecies and hybrids) are known for Luxembourg.
	www.mnhnl.lu /cgi-bin/baseportal.pl?htx=/atlas/pterido/intro (229 words)

	Museum of New Zealand Te Papa Tongarewa, Wellington, NZ - Documenting New Zealand’s Pteridophyte Flora - Patrick ... (Site not responding. Last check: 2007-10-05)
		For every species of pteridophyte occurring naturally in New Zealand, this book provides a list of Latin, Māori, and English names, a full description, notes on distribution, habitat preference, field-recognition characters, and hints for cultivation.
		A comprehensive list of all basionyms and synonyms used for New Zealand pteridophytes has been prepared and can be accessed through the New Zealand Plant Names Database http://nzflora.landcareresearch.co.nz/default.aspx.
		The great benefit of an interactive key is that it allows users to take advantage of characters that are actually associated with the specimen in hand, and doesn’t rely on characters proscribed by a printed key.
	www.tepapa.govt.nz /TePapa/English/CollectionsAndResearch/Collections/Plants/PteridophyteFlora.htm (440 words)

	Pteridophyte Flora of Nilgiris, South India Online Indian Book store - Bagchee’s Best sellers Books (Site not responding. Last check: 2007-10-05)
		The present work is based on the intense field work personally carried out on the Nilgiris by the authors during 1991-1992 by spending 55 days in the field.
		This book includes 144 species of Pteridophytes with short description along with identification keys for genera and species and ecological notes.
		This is the modern account on the Pteridophyte Flora for this phytogeographically important region.
	www.bagchee.com /BookDisplay.aspx?Bkid=B23550 (418 words)

	Electronic Pteridophyte Flora of Australia (Site not responding. Last check: 2007-10-05)
		Pteridophytes are in the second rank priority for the Austrlaia's Virtual Herbarium project and the timing of both efforts are quite compatible.
		Although the database and server for the Electronic Pteridophyte Flora of Australia will be maintained at the Australian National Herbarium (CANB) in Canberra, the collaborative nature of this project aims to derive support from a wide national and international user base from the outset.
		Pteridophyte images from the National Plant Photograph Index are available for this project and additional Pteridophyte photographs will be sought for this collection.
	www.anbg.gov.au /projects/fern/epfoa/project_plan.html (2325 words)

	vPlants \| What Plants Are Included?
		Based on characters of anatomy and morphology, pteridophytes, gymnosperms and angiosperms all belong to the vascular plant group.
		The pteridophyte group includes ferns, horsetails, club mosses, and their relatives.
		Angiosperms are by far more dominant on Earth today than are the gymnosperms and pteridophytes; it is the most diverse plant group alive and includes organisms from lawn grasses to oak trees.
	www.vplants.org /plantsincluded.html (208 words)

	British Pteridological Society: Pteridophyte Photographs by K & H Rasbach
		British Pteridological Society: Pteridophyte Photographs by K and H Rasbach
		A gallery of 21 fine photographs of Pteridophytes by K and H Rasbach.
		These have been converted via Photo CD and can be viewed as large high-resolution images by selecting the small images or their captions on this page.
	www.nhm.ac.uk /hosted_sites/bps/rasbach/rasbach.htm (63 words)

	Plant DNA C-Value Database Updates (Site not responding. Last check: 2007-10-05)
		The total number of pteridophyte species listed with C-values is now 87.
		Below is a summary of the C-value data released in the different sections of the database together with appropriate citation information.
		Pteridophyte DNA C-values database (release 1.0, Dec. 2000).
	www.kew.org /cval/updates.html (850 words)

	Studies on inhibitors of mammalian DNA polymerase alpha and beta: sulfolipids from a pteridophyte, Athyrium niponicum.
		Studies on inhibitors of mammalian DNA polymerase alpha and beta: sulfolipids from a pteridophyte, Athyrium niponicum.
		Three sulfolipid compounds, 1, 2, and 3, have been isolated from a higher plant, a pteridophyte, Athyrium niponicum, as potent inhibitors of the activities of calf DNA polymerase alpha and rat DNA polymerase beta.
		The inhibition by the sulfolipids was concentration dependent, and almost complete inhibition of DNA polymerase alpha and DNA polymerase beta was achieved at 6 and 8 microg/mL, respectively.
	www.aegis.com /aidsline/1998/jun/M9861451.html (454 words)

	British Pteridological Society: Fern Flora Worldwide: Threats and Responses - An International Symposium 23-26 July ...
		Whilst the Society's involvement with pteridophyte conservation had hitherto been limited to UK and the wider Europe, we realised from the outset that involving an international partner in planning the actual programme would 'widen the net'.
		The Symposium is a milestone in pteridophyte conservation, in providing the first opportunity for the PSG to meet as a group.
		One major aim of the PSG is a Conservation Review of world pteridophytes and the conservation status of rare species and fern-rich habitats.
	www.nhm.ac.uk /hosted_sites/bps/symposium/symposiumprologue.htm (606 words)

	Robbin C. Moran
		I was the main writer, editor, and organizer for the pteridophyte volume of Flora Mesoamericana, a book that covers the pteridophytes from southern Mexico to Panama.
		I am also collaborating with John Mickel on a guide to 300 common fern species in the American tropics and a manual to the pteridophyte genera of the Americas.
		Moran, R.C. “The importance of mountains to pteridophytes, with emphasis on neotropical montane forests.” In: S.P. Churchill et al., eds., Biodiveristy and Conservation of Neotropical Montane Forests, p.
	www.nybg.org /bsci/staf/moran.html (561 words)

	Ranker, Tom A. (Site not responding. Last check: 2007-10-05)
		Studies of pteridophytes that represent a microcosm of the entire field of conservation biology are being conducted around the world.
		The presentations in this symposium run the gamut from studies of particular rare species of pteridophytes to studies of entire floras, both temperate and tropical.
		Studies of entire pteridophyte floras will 1) relate patterns of distribution of rare/endemic taxa to the pteridophyte life cycle, 2) describe efforts of propagating and reintroducing endangered species, 3) explain the construction and use of pteridophyte biodiversity databases, and 4) document efforts to incorporate local communities in regional conservation efforts.
	www.ou.edu /cas/botany-micro/bsa-abst/sympos7/abstracts/13.shtml (196 words)

	Search Results for pteridophyte - Encyclopædia Britannica
		All pteridophyte roots are referred to as adventitious, in the sense that they arise at points along the stem.
		The life cycle of pteridophytes exhibits an alternation of generations between gametophytes and sporophytes.
		The gametophytes are sexual plants producing eggs or sperm or both, and the sporophytes...
	www.britannica.com /search?query=pteridophyte&submit=Find&source=MWTEXT (345 words)

	Untitled Document (Site not responding. Last check: 2007-10-05)
		We used an indicator species approach to classify primary rainforest vegetation for purposes of comparative wildlife habitat studies.
		We documented species composition of pteridophytes (ferns and fern allies) in 635 plots (2_/100 m) along 8 transects within a continuous rainforest landscape in northeastern Peruvian Amazonia.
		The obtained forest classification was interpreted with the help of indicator value analysis and known soil preferences of the pteridophyte species.
	www.sci.utu.fi /amazon/The_team/Publications/individual_publications/Salovaara_et_al_2004_Ecogr.htm (165 words)

	New Phytologist Abstract (Site not responding. Last check: 2007-10-05)
		• Hydraulic characteristics of pteridophyte (fern and Selaginella) foliage were investigated to determine whether the processes of water conduction and water loss are coordinated in these early vascular plants similarly to angiosperms.
		• Eight species of pteridophytes and associated woody angiosperms were examined from the sun and shade in a seasonally dry tropical forest.
		) in the four pteridophytes was within the range of the sampled shade angiosperms but much lower than that of the sun-dwelling angiosperms.
	www.blackwellpublishing.com /abstract.asp?ref=0028-646X&vid=162&iid=3&aid=9&s=&site=1 (332 words)

	AZOLLA PINNATA R.Br. PTERIDOPHYTE; SALVINIALES (AZOLLA CEAE) IN THE MANAGEMENT OF LAKE AGRO ECOSYSTEM - G.V. Gopal
		The management and usage of this plant in a lake agro-ecosystem for better production of fertiliser, increase in efficiency and productivity, aquaculture, nitrogen fixation, food for poultry, use as antifungal agent and water purifier, has been highlighted here.
		Azolla pinnata, A. microphylla and A. filiculoides are the common pteridophyte species found in Kukkarahalli lake, of which the latter two are common in the lake, while A. pinnata R.Br.
		Watanabe, I. olla and its use in lowland rice culture, Soil Microb, 20: 1-10.
	ces.iisc.ernet.in /energy/water/proceed/proceedings_text/section2/paper3/section2paper3.htm (1253 words)

	Fern references used in these pages; taxonomic notes and other notes. (Site not responding. Last check: 2007-10-05)
		Pteridophyte Flora of Oaxaca, Mexico, in Memoirs of the New York Botanical Garden.
		Smith, A. Pteridophytes, in Flora of Chiapas, Vol.
		The Pteridophytes of São Tomé and Príncipe (Gulf of Guinea).
	www.caverock.net /~bj/fernrefs.htm (1498 words)

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