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Topic: Pistia

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	Pistia - Wikipedia, the free encyclopedia
		Pistia is a genus of aquatic plant in the family Araceae, comprising a single species, Pistia stratiotes, often called water lettuce.
		Mats of Pistia block gas exchange at the air-water interface, this reduces the oxygen in the water, killing fish, they also block light killing native submerged plants, and alter emersed plant communities by crushing them.
		Adults and larvae of the South American weevil, Neohydronomous affinis feed on Pistia leaves, and the larvae of moth Spodoptera pectinicornis from Thailand, both are proving to be useful tools in the management of Pistia.
	en.wikipedia.org /wiki/Pistia (368 words)

	International Aroid Society (Site not responding. Last check: 2007-11-04)
		The first descriptions of Pistia, the water lettuce, are by the ancient Egyptians and by the Greek philosphers Dioscorides and Theophrastus (Stoddard 1989).
		Pistia seems to depend on high quantities of light and to be sensitive to cool temperatures (optimally 25 degree Celsius, Pieterse 1978, Pieterse et al.
		Arber, A. The vegetative morphology of Pistia and the Lemnaceae.
	www.aroid.org /genera/pistia/pistia.html (2118 words)

	Abstracts 53(3)
		Of the 14 genera closest to Pistia, only Alocasia, Arisaema, and Typhonium are species-rich, and the latter two were studied previously, facilitating the choice of representatives that span the roots of these genera.
		Results indicate that Pistia and the Seychelles endemic Protarum sechellarum are the basalmost branches in a grade comprising the tribes Colocasieae (Ariopsis, Steudnera, Remusatia, Alocasia, Colocasia), Arisaemateae (Arisaema, Pinellia), and Areae (Arum, Biarum, Dracunculus, Eminium, Helicodiceros, Theriophonum, Typhonium).
		The oldest fossils of the Pistia clade, though not Pistia itself, are 45-my-old leaves from Germany; the closest outgroup, Peltandreae (comprising a few species in Florida, the Mediterranean, and Madagascar), is known from 60-my-old leaves from Europe, Kazakhstan, North Dakota, and Tennessee.
	hydrodictyon.eeb.uconn.edu /systbiol/issues/53_3/abstracts53_3.html (2463 words)

	Pistia stratiotes, description (Site not responding. Last check: 2007-11-04)
		Pistia stratiotes is an excellent plant for the aquarium, where its floating rosettes make a perfect shelter for young fish and fry.
		The plant can however become rather large, more than 30 cm (12 inch) in diameter, but the plant will multiply very fast, so by frequently removing of the biggest plants, you can keep a population of plants in exactly the size you prefer, down to about 5 cm (2 inch) in diameter..
		In the summer, Pistia stratiotes can very well be kept in a garden-pond, however, it is not winterhardy.
	home10.inet.tele.dk /sveri/plant-e/besk/pist-str.html (153 words)

	C.I.: Archive of Manifesti
		lémna pistia is documenting a gyrovague experiment operating upon the chromosomes of beauty and perception: muses and daemons of beauty and information: chaotic information: chaotic evolution, mutation: rebirth through destruction.
		lémna pistia is a salamander, omniplasm, protean chaos diffluens, striving to live in the streaming flux of continual creation and destruction, in the fiery rther of irrationalism, in the sphere of lucid inspiration.
		lémna pistia is a procession of muses constantly altering their glistering robes, veiled, veiledm shifting through burning chambers of fevered logic: dancing, dancing, matrix-step and hallucin.
	www.thing.net /~grist/cyano/doc/cimania.htm (1395 words)

	Pistia stratiotes - Invasive Aquatic Plants of the United States
		Pistia stratiotes: water lettuce is very easy to identify: it resembles a floating open head of lettuce and may be found singly or in abundance; its light green leaves are thick, hairy and ridged; its flowers are not seen except by close examination
		Experts disagree as to whether or not Pistia stratiotes is native to the U.S. After all, it was observed, described and drawn by William Bartram in 1765 during his explorations of Florida.
		Pistia stratiotes, water lettuce, is believed by some to be a native plant and by others to be a non-native plant that arrived in the ballast of explorer's sailing ships.
	plants.ifas.ufl.edu /seagrant/pisstr2.html (1264 words)

	Interactions between fish and aquatic macrophytes in inland waters
		Pistia stratiotes is a free floating common aquatic plant in tropical Africa, where it occasionally forms dense and large mats.
		Throughout the observation period, in Lake Volta the Pistia roots macroinvertebrate fauna was dominated by the predatory dragonfly nymphs, which although low in numbers exceeded browsers and filter feeders in biomass.
		In 1965, the first year of the reservoir filling, Pistia of Lake Volta also harboured the snail Bulinus forskalii, which was very numerous at the peak of the dry season, when the water level was slowly declining and the surface water temperatures were at their highest.
	www.fao.org /DOCREP/006/X7580E/X7580E07.htm (5742 words)

	23(1) AQUAPHYTE
		Previous hypotheses about the plant relationships of Pistia had to be based on morphology alone, which in its case is difficult because of the plant's much-condensed flower and other reproductive structures.
		Pistia stratiotes appears in the lower right, and it is the sister group to the entire circle of genera ‘above it' in the tree.
		Phylogeny and evolution of the pantropical aquatic weed Pistia stratiotes (Araceae).
	plants.ifas.ufl.edu /aq-s03-30.html (551 words)

	ARS \| Publication request: The Role of Druse and Raphide Calcium Oxalate Crystals in Tissue Calcium Regulation in ... (Site not responding. Last check: 2007-11-04)
		Technical Abstract: Ca oxalate crystal formation was examined in Pistia stratiotes L. leaves during excess Ca and Ca deficient conditions.
		Pistia produces druse crystal idioblasts in the adaxial mesophyll and raphide idioblasts in the abaxial aerenchyma.
		Raphide crystals were previously found to grow bidirectionally, and here we show that Ca is incorporated along the entire surfaces of developing druse crystals, which are coated with membrane boun microprojections.
	www.ars.usda.gov /research/publications/publications.htm?seq_no_115=120864 (519 words)

	pistia (Site not responding. Last check: 2007-11-04)
		The origin of Pistia is speculative, with suggestions that it originated in Africa or North America based on historical records and fossils.
		Based on the preponderance of insect herbivores that feed on this plant originating from South America, it is more plausible that this is the real origin.
		Pistia is widely traded as a pond plant and under high nutrient conditions can quickly dominate a water body as a dense, floating monoculture.
	www.lucidcentral.com /keys/APPW/html/pistia.html (195 words)

	issg Database: Ecology of Pistia stratiotes
		Pistia stratiotes is an invasive weed that is found throughout the tropics and subtropics.
		Preventative measures: A risk assessment of Pistia stratiotes for the Pacific region was prepared by Pacific Island Ecosystems at Risk (PIER) using the Australian risk assessment system (Pheloung, 1995).
		The result is a score of 18 and a recommendation of: reject the plant for import (Australia) or species likely to be a pest (Pacific).
	www.issg.org /database/species/ecology.asp?si=285&fr=1&sts= (937 words)

	PistiaPds
		: Pistia stratiotes LINNAEUS, 1753 is a member of the monocot Family Araceae, the arums; a group of much importance to aquarists.
		Pistia bear a floating rosette of light green, longitudinally grooved leaves that appear overly large, thick and spongy.
		For use indoors, this plant needs to have the water lowered in its tank to provide living space, but a top provided to maintain high humidity.
	www.wetwebmedia.com /PondSubWebIndex/pistiapds.htm (714 words)

	Chapter 5 Waterlettuce - Biological Control of Invasive Plants in the Eastern United States
		Pistia is a monotypic genus in the subfamily Aroideae (Grayum, 1990).
		Pistia’s next closest affinities are with Arisaema (three species), which, like waterlettuce, belongs to the subfamily Aroideae (Grayum, 1990).
		Stoddard (1989) argues that Florida served as a refugium for Pistia during this period, and that the genus is therefore native to the United States.
	www.invasiveplants.net /biologicalcontrol/5Waterlettuce.html (5579 words)

	Pistia stratiotes L. tissue culture; long term cultures (Site not responding. Last check: 2007-11-04)
		Pistia stratiotes L. tissue culture; long term cultures
		A student I'm working with is interested in culturing Pistia stratiotes L. in vitro.
		He hasn't found any references yet but has just started his search.
	plant-tc.coafes.umn.edu /listserv/1995/log9505/msg00069.html (116 words)

	Calcium Channels are Involved in Calcium Oxalate Crystal Formation in Specialized Cells of Pistia stratiotes L. -- VOLK ...
		Calcium Channels are Involved in Calcium Oxalate Crystal Formation in Specialized Cells of Pistia stratiotes L. -- VOLK et al.
		Pistia stratiotes L. is a free-floating aquatic angiosperm that
		Pistia protoplasts were isolated as described in Franceschi
	aob.oxfordjournals.org /cgi/content/full/93/6/741 (6772 words)

	Pistia stratiotes (Araceae) - HEAR species info (Site not responding. Last check: 2007-11-04)
		Information on Pistia stratiotes as relevant to Pacific Islands is provided by the Pacific Island Ecosystems at Risk project (PIER).
		Images of Pistia stratiotes (Araceae) are presented online by the Pacific Island Ecosystems at Risk project (PIER) (USDA/Forest Service).
		The Global Compendium of Weeds* cites references to Pistia stratiotes as a weed (*an early draft).
	www.hear.org /species/pistia_stratiotes (249 words)

	ARS \| Publication request: Calcium Channels Are Involved in Calcium Oxalate Crystal Formation in Specialized Cells of ... (Site not responding. Last check: 2007-11-04)
		Calcium Channels Are Involved in Calcium Oxalate Crystal Formation in Specialized Cells of Pistia Stratiotes L. Annals of Botany 93:741-753.
		This project uses localization, microautoradiography, and inhibitors to demonstrate that calcium channels play a role in calcium accumulation within the endoplasmic reticulum of idioblast cells in Pistia.
		Technical Abstract: Pistia stratiotes L. produces calcium (Ca) oxalate crystals in specialized cells called crystal idioblasts.
	www.ars.usda.gov /research/publications/Publications.htm?seq_no_115=161160 (431 words)

	Pistia stratoites (Site not responding. Last check: 2007-11-04)
		Pistia stratiotes is a free floating plant for open aquariums and indoor ponds with a rosette of blue-green leaves.
		When restricted by lack of free water space, the plants will take root in soil.
		I bought my Pistia stratiotes plants at an auction this past fall.
	users.kent.net /~lisab/Pistiastratoites.html (348 words)

	Evolution of Duckweed (Site not responding. Last check: 2007-11-04)
		Pistia, water lettuce, is considered by many researchers to be the closest relative of the duckweeds.
		For this reason, Pistia, while a close relative, may be a cousin rather than an ancestor of duckweeds.
		Hesse Michael, University of Vienna, Austria, detailed botanical discussion of the differences between duckweeds and Pistia.
	www.mobot.org /jwcross/duckweed/duckweed-evolution.htm (1771 words)

	Aruba Facts - Aruba News Desk - Newsletter February 1 - 28, 2001
		The raft which is used to accumulate Pistia for the machinery will keep on working the whole week.
		Nonetheless having Pistia stratiotes under control does by no means imply the solution of unwanted aquatic plants.
		The consequences will be the same as Pistia stratiotes, being a full coverage of the water surface with resulting decline of the fish stock and avian population.
	www.visitaruba.com /facts/newsdesk/backissues/newsletter45.html (5779 words)

	Pistia (Site not responding. Last check: 2007-11-04)
		It will definitely not survive chilling toward freezing temperatures.
		: Stodola states that Pistia may be cultivated with other floating plants like Ceratopteris, Salvinia, Lemna, but I prefer to keep water lettuce with most anything it doesn't have to share the surface with; and that can stand to be shaded from a medium to high extent.
		Sexually, a small greenish spathe develops near the plants middle with a female flower at the lower end and a few male ones near the upper tip.
	www.wetwebmedia.com /PlantedTksSubWebIndex/pistia.htm (711 words)

	Antidermatophytic activity of Pistia stratiotes Premkumar VG, Shyamsundar D - Indian J Pharmacol
		Antidermatophytic activity of Pistia stratiotes Premkumar VG, Shyamsundar D - Indian J Pharmacol
		Dermatophytes belonging to the three genera, Trichophyton, Epidermophyton and Microsporum affect the keratinous tissue of humans and of other vertebrates, causing superficial fungal infections.
		[1] The present study reports the in vitro antidermatophytic activity of methanolic leaf extract of Pistia stratiotes against a battery of dermatophytes.
	www.ijp-online.com /article.asp?issn=0253-7613;year=2005;volume=37;issue=2;spage=127;epage=128;aulast=Premkumar (977 words)

	Indian Journal of Pharmacology: Antidermatophytic activity of Pistia stratiotes (Site not responding. Last check: 2007-11-04)
		Dermatophytes belonging to the three genera, Trichophyton, Epidermophyton and Microsporum affect the keratinous tissue of humans and of other vertebrates, causing superficial fungal infections.[1] The present study reports the in vitro antidermatophytic activity of methanolic leaf extract of Pistia stratiotes against a battery of dermatophytes.
		Natarajan V, Venugopal PV, Menon T. Effect of Azadirachta Indica (Neem) on the growth pattern of dermatophytes.
		The flavonoid chemistry of Pistia stratiotes L. and the origin of the lemnaceae.
	www.findarticles.com /p/articles/mi_m0RUE/is_2_37/ai_n13603871 (919 words)

	Weeds of Rain Fed Lowland Rice Fields of Laos & Cambodia - Araceae ~ Pistia L. (Site not responding. Last check: 2007-11-04)
		Weeds of Rain Fed Lowland Rice Fields of Laos & Cambodia - Araceae ~ Pistia L. Weeds of Rain Fed Lowland Rice Fields of Laos & Cambodia
		Control methods: The larvae of Proxenus hennia Swinhoe (feeding on Pistia) and Nymphula responsalis Wlk.
		Cite this publication as: ‘Naples, M.L. Weeds of Rain Fed Lowland Rice Fields of Laos & Cambodia.
	www.nationaalherbarium.nl /Riceweedsweb/www/pistia.htm (200 words)

	Pistia stratiotes (PIER species info) (Site not responding. Last check: 2007-11-04)
		Biological: "The curculionid weevil Neohydronomous pulchellus [affinis], which was collected in South America substantially reduced growth of Pistia stratiotes in Australia and Zimbabwe.
		This is the most sustainable method to control this free floating weed" (GPPIS).
		Gerlach, J. Seychelles wetland invader: Pistia stratiotes-water lettuce.
	www.hear.org /pier/species/pistia_stratiotes.htm (557 words)

	Angiosperm Families - Araceae Juss.
		Self supporting, or epiphytic, or climbing (some very large); when climbing stem twiners, or root climbers, or scrambling.
		Hydrophytic, or helophytic, or mesophytic; when hydrophytic rooted, or free floating (Pistia).
		Leaves small to very large; alternate; spiral, or distichous; petiolate (appearing conventionally ‘petiolate’ when the sheath shed), or sessile (Pistia only); sheathing (the sheath membranous, sometimes deciduous).
	delta-intkey.com /angio/www/araceae.htm (884 words)

	Pistia
		[ Pistacia ] [ Pistia ] [ Pistorinia ]
		Vernacular names of plants within the Genus Pistia
		For a description of the methodology followed in establishing this hierarchy see the note Nomenclature used in The Compleat Botanica.
	www.crescentbloom.com /Plants/Genus/P/I/Pistia.htm (67 words)

	Lemnaceae versus Pistia, and Limniobiophyllum (Site not responding. Last check: 2007-11-04)
		usually Lemnaceae are considered to be closely related to Pistia
		Pistia and its Aralean relatives always have inaperturate pollen with an
		at one hand and Pistia (with its related genera of Aroideae) on the other hand.
	www.mobot.org /jwcross/duckweed/michael_hesse_email.html (239 words)

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