
	Where results make sense

Topic: Cryptomonads

Related Topics

Haptophyte

Heterokont

Algae

Cryptomonas

Golden alga

Dinoflagellate

Synurid

Vacuole

Euglenozoa

Leucoplast

Opisthokont

Choanoflagellate

Flagellate

Eukaryote

Xenophyophorea

	Cryptomonad - Wikipedia, the free encyclopedia
		Cryptomonads distinguished by the presence of characteristic extrusomes called ejectisomes, which consist of two connected spiral ribbons held under tension.
		Cryptomonad flagella are inserted parallel to one another, and are covered by bipartite hairs called mastigonemes, formed within the endoplasmic reticulum and transported to the cell surface.
		There is considerable evidence that cryptomonad chloroplasts are closely related to those of the heterokonts and haptophytes, and the three groups are sometimes united as the Chromista.
	en.wikipedia.org /wiki/Cryptomonads (381 words)

	B332refs Cryptomonads
		DNA is present in the nucleomorph of cryptomonads: Further evidence that the chloroplast evolved from a eukaryotic endosymbiont.
		Gillot, M.A. and Gibbs, S.P. The cryptomonad nucleomorph: Its ultrastructure and the evolutionary significance.
		Ludwig, M. and Gibbs, S.P. DNA is present in the nucleomorph of cryptomonads: Further evidence that the chloroplast evolved from a eukaryotic symbiont.
	www.zoology.ubc.ca /courses/bio332/B443refsCryptos.htm (338 words)

	cryptomonad (Site not responding. Last check: 2007-11-07)
		Most cryptomonads contain a chloroplast, although a few are colorless, either containing a leukoplast (e.g.
		The nucleomorph formerly was the nucleus of the red alga; the periplastidial space between the middle two surrounding membranes, which is filled with eukaryotic ribosomes and starch grains, corresponds to the former cytoplasm of the red alga.
		Since the plastid of the cryptomonads is derived from a red alga, it is also termed a rhodoplast to differentiate it from the chloroplasts of the green lineage.
	www.yourencyclopedia.net /Cryptomonad.html (295 words)

	DOUGLAS.ABS
		Superimposed upon this scenario are the eukaryotes that are in the process of acquiring plastids by tertiary endosymbiosis from the green algal, cryptomonad, chromophyte and haptophyte lineages (Schnepf, 1993), and those that have apparently lost the capacity to photosynthesize yet retain vestigial plastids (apicomplexans, parasitic plants, colorless cryptomonads and euglenoids).
		Additional evidence for a close relationship between the cryptomonad plastid and red algae is the paucity of introns in the genomes of both organisms.
		Cryptomonad algae are evolutionary chimaera of two phylogenetically distinct unicellular eukaryotes.
	www.mbl.edu /CASSLS/DOUGLAS.ABS.html (1018 words)

	Cryptomonads
		Cryptomonads, the Phylum Cryptophyta, consist of about 200 species that are considered both algae (Order Cryptomonadida) and protozoans (Class Cryptophyceae).
		All Cryptomonads have biflagellated cells and are phagotrophic.
		Cryptomonads, at one stage of the life cycle, encyst in protective cellulosic spheres; they can reproduce asexually in either this phase or the active state.
	www.sidwell.edu /us/science/vlb6/labs/Classification_Lab/Eukarya/Protista/Cryptomonads (291 words)

	Guardian Unlimited \| Special reports \| A life lived in threes
		There are some single-celled algae, the romantic and mysteriously named cryptomonads, in which the secondary symbiont retains a tiny nucleus in addition to the chloroplast.
		The cryptomonad cell wears this shrivelled second nucleus, or "nucleomorph" the same way a headhunter would wear the shrunken heads of its enemies slung on its belt.
		Cryptomonads are not the only organisms whose chloroplasts retain a sliver of a remnant nucleus.
	www.guardian.co.uk /genes/article/0,2763,478442,00.html (968 words)

	iqexpand.com (Site not responding. Last check: 2007-11-07)
		Teleaulax Template:Taxobox end The cryptomonads are a small group of flagellates, most of which have chloroplasts.
		Cryptomonad Cyanobacteriaceae Agmenellum quadruplicatum Agmenellum thermale Anabaena wisconsinense Anabaena flos-aquae Aphanocapsa sp.
		The nucleus in question is the so-called nucleomorph of a cryptomonad alga, Guillardia theta, and its genome weighs in at a mere 0.55 million base pairs.
	cryptomonad.iqexpand.com (613 words)

	Cryptomonad (Site not responding. Last check: 2007-11-07)
		In total, then, the chloroplast is bound by four membranes with a tiny nucleus (nucleomorph[?]) contained between the middle two.
		It typically has chlorophylls a and c, much like the dinoflagellates (with which the cryptomonads were formerly grouped) and stramenopiles.
		A few cryptomonads have reached a palmelloid stage of organization, but the vast majority are free-living flagellates, and are common in nutrient rich water.
	www.termsdefined.net /cr/cryptomonad.html (406 words)

	Eutrophication -- 19.6 Spatial variability of phytoplankton
		Less eutrophic conditions in the central and northern parts of the Gulf favoured the growth of cryptomonads and diatoms.
		The early autumn phase in 1993 (after an intense bloom of cyanobacteria which covered the entire Gulf; [259]) was characterized by high heterotrophic activity and the phytoplankton community was dominated by cryptomonads (on the average 50 % of total biomass).
		Cryptomonads, as main constituents of the phytoplankton community, were most abundant on the western side of the Gulf or generally in areas with less total N or P. Basin-wide the distribution of phytoplankton variables correlated clearly, except during the early autumn stage, with environmental factors such as salinity, stratification and nutrients.
	lepo.it.da.ut.ee /~olli/eutr/html/htmlBook_142.html (750 words)

	The highly reduced genome of an enslaved algal nucleus : Nature
		Cryptomonad cells depend on four genomes, each encoding distinct protein synthesis machineries in discrete compartments, between which proteins are translocated.
		In cryptomonads, the chloroplast and nucleomorph (former red algal nucleus) are topologically in the periplastid space (starch- and ribosome-containing residual cytoplasm of the former red algal cell, yellow) in the periplastid membrane (former red algal plasma membrane), which is located in the lumen of the host's rough endoplasmic reticulum (RER).
		Cryptomonad and chlorarachnean nucleomorphs are natural experiments in genome miniaturization and cell simplification that can test basic ideas about genome and cell functions.
	www.nature.com /nature/journal/v410/n6832/full/4101091a0.html (3980 words)

	Nucleomorph - Wikipedia, the free encyclopedia
		So far, only two groups of organisms are known to contain a nucleomorph: the cryptomonads and the chlorarachniophytes.
		Studies of the genomic organization and of the molecular phylogeny have shown that the nucleomorph of the cryptomonads formerly was the nucleus of a red alga, whereas the nucleomorph of the chlorarchniophytes formerly was the nucleus of a green alga.
		In both groups of organisms the plastids originate from engulfed photoautotrophic eukaryotes.
	en.wikipedia.org /wiki/Nucleomorph (195 words)

	MavicaNET - Cryptophyta (cryptomonads) (Site not responding. Last check: 2007-11-07)
		Catalogo / Natura / Vita / Protoctists (Protoctistae) / Eucarioti inferiori / Cryptophyta (cryptomonads)
		Catalogo / Natura / Vita / Protoctists (Protoctistae) / Le alghe dorate (Chrysophyta) / Cryptophyta (cryptomonads)
		Catalogo / Natura / Vita / Protoctists (Protoctistae) / Cryptophyta (cryptomonads)
	www.mavicanet.com /lite/ita/7103.html (176 words)

	Honours: Completed - Abstracts (Site not responding. Last check: 2007-11-07)
		It is suspected that grazing was occurring on classes of algae identified in the natural plankton assemblage.
		cryptomonads~ chlorophytes, diatoms and prasinophytes were reduced in concentration, cyanobacteria, and coccolithophorids were not.
		The chlorophytes and diatoms both decreased in abundance, as did the cryptomonads initially, followed by a recovery.
	www.iasos.utas.edu.au /97Hons.Abstracts.html (4410 words)

	Nuclear-Encoded, Plastid-Targeted Genes Suggest a Single Common Origin for Apicomplexan and Dinoflagellate Plastids -- ...
		cryptomonad genes, we focused on the eukaryotic cytosolic (GapC)
		Cryptomonads are shown with a dashed line to indicate their uncertain role due to the position of the cryptomonad cytosolic GAPDH in the phylogeny.
		A, The plastid arose from the endosymbiotic uptake of a red alga in the ancestor of alveolates, heterokonts, and perhaps cryptomonads.
	mbe.oxfordjournals.org /cgi/content/full/18/3/418 (5377 words)

	[No title] (Site not responding. Last check: 2007-11-07)
		The chloroplast in the red alga is the remnant of a primary endosymbiont.
		The red alga is a secondary endosymbiont in the heterotroph cell, the cryptomonad.
		Photosynthetic species contain in their chloroplast chlorophyll a and c, ±-carotene, a phycobilin (either phycoerythrin or phycocyanin). Unlike other algae, cryptomonads lack ²-carotene. The cells have two anterior slightly unequal flagella of about the same length as the cell. Cryptomonads are important components of the phytoplankton and are readily ingested by zooplankton.
	www.cbu.edu /~esalgado/BIOL216/chapter16.doc (1504 words)

	Inter Research » MEPS » v145 » p161-177
		For each experiment, we set up 4 orthogonal treatments in enclosures in each of 3 or 4 pools: (1) micrograzers removed and nutrients enriched, (2) micrograzers removed and nutrients at natural levels, (3) micrograzers at natural densities and nutrients enriched, and (4) both micrograzers and nutrients at natural levels.
		In 1 pool in June, reduction in grazer density had a negative effect on pennate diatoms, cryptomonads and chlorophytes in the first week of the experiment, but a positive effect on pennate diatoms in the second week.
		In 1 pool in August, nutrient enrichment had a positive effect on prasinophytes in the first week of the experiment, and grazer reduction had a negative effect on cryptomonads and chlorophytes in the second week.
	www.int-res.com /abstracts/meps/v145/p161-177 (443 words)

	midterm exam 1 1999
		Discuss the ecological role of phagotrophy in euglenoids, cryptomonads, haptophytes, dinoflagellates, and ochrophytes.
		B4 You are called to serve as an expert in determining the cause of a monospecific red or red-brown colored freshwater phytoplankton bloom, and asked to assess the relative danger of the bloom to livestock, waterfowl, invertebrates, and people.
		List the algal genera/species that could be responsible (your list should include at least one cyanobacterium, euglenoid, cryptomonad, haptophyte, dinoflagellate, and chrysophyte), along with the relative degree of danger associated with that form.
	www.botany.wisc.edu /courses/botany_330/midterm.html (693 words)

	CHROMALVEOLATA
		The cryptomonads are among the most ubiquitous of aquatic organisms.
		This system is a modification of Margulis and Schwartz (1988 and 1998) in which the cryptomonad phylum is designated Pr-7 and Pr-11, respectively.
		Baldauf (2003) presents a consensus view of recent molecular-ultrastructural data in which the cryptomonads occur in a clade with the haptophytes and are associated with the heterokont clade.
	comenius.susqu.edu /bi/202/CHROMALVEOLATA/EUKARYOMONADAE/CRYPTOMONADA.htm (380 words)

	Marine biology - Open Encyclopedia (Site not responding. Last check: 2007-11-07)
		The role of phytoplankton is better understood due to their critical position as the most numerous primary producers on Earth.
		Phytoplankton fit into these categories: cyanobacteria (also called blue-green algae/bacteria), various types of algae: red, green, brown, and yellow-green, diatoms, dinoflagellates, euglenoids, coccolithophorids, cryptomonads, crysomonads, chloromonads, prasinomonads, and silicoflagellates.
		Zooplankton tend to be somewhat larger, and not all in this list are microscopic.
	open-encyclopedia.com /Marine_biology (1560 words)

	Microscope - information about microbes (Site not responding. Last check: 2007-11-07)
		Description of Chilomonas: Colourless cryptomonads with a rostrate anterior, not phagocytic; furrow/gullet complex consisting of a vestibulum, a short furrow and long tubular gullet; both flagella with a unilateral row of tubular hairs; periplast has an inner single sheet with numerous ejectisome pores and a surface periplast component consisting primarily of fibrils.
		The body shape of most cryptomonads is similar, rounded or pointed posteriorly, perhaps with a very slight twist, widest just subapically.
		The pocket is lined with explosive extrusomes (the type in cryptomonads is called ejectisome), and small extrusomes also lie under the body surface.
	microscope.mbl.edu /scripts/microscope.php?func=imgDetail&imageID=9839 (204 words)

	Learn more about Alga in the online encyclopedia. (Site not responding. Last check: 2007-11-07)
		The latter chlorophyll type is not known from any prokaryotes or primary chloroplasts, but genetic similarities with the red algae suggest a relationship there.
		In the first three of these groups the chloroplast has four membranes, retaining a nucleomorph in cryptomonads.
		It has been suggested that these groups, sometimes referred to as the Chromista, also share a common origin but this is far from certain.
	www.onlineencyclopedia.org /a/al/alga.html (834 words)

	Encyclopedia: Kingdom (biology) (Site not responding. Last check: 2007-11-07)
		The discovery that bacteria have a radically different cell structure from other organisms (prokaryotic rather than eukaryotic) led Herbert Copeland to give them a separate kingdom, originally called Mychota but later referred to as Monera or Bacteria.
		Typical phyla Rhodophyta (red algae) Chromista Heterokontophyta (heterokonts) Haptophyta Cryptophyta (cryptomonads) Alveolates Pyrrhophyta (dinoflagellates) Apicomplexa Ciliophora (ciliates) Excavates Euglenozoa Percolozoa Metamonada Rhizaria Radiolaria Foraminifera Cercozoa Amoebozoa Choanozoa Many others; classification varies Protists are a heterogeneous group of living things, comprising those eukaryotes which are neither animals, plants, or fungi.
		Typical phyla Rhodophyta (red algae) Chromista Heterokontophyta (heterokonts) Haptophyta Cryptophyta (cryptomonads) Alveolates Pyrrhophyta (dinoflagellates) Apicomplexa Ciliophora (ciliates) Excavates Euglenozoa Percolozoa Metamonada Rhizaria Radiolaria Foraminifera Cercozoa Amoebozoa Choanozoa Many others; classification varies The Kingdom Protista or Protoctista is one of the commonly recognized biological kingdoms, including all the eukaryotes except for...
	www.nationmaster.com /encyclopedia/Kingdom-(biology) (2051 words)

	Cryptophyta - the cryptomonads (Site not responding. Last check: 2007-11-07)
		Note, however, that this does not imply ancestor/descendant relationships among the extant groups, but rather retention of ancestral character states from common ancestors.
		Douglas,S.E. and Penny,S.L. The plastid genome from the cryptomonad alga, Guillardia theta: complete sequence and conserved synteny groups confirm its common ancestry with red algae J.
		Krugens, P. Ultrastructrure of fertilization in a cryptomonad.
	www.life.umd.edu /labs/delwiche/Pslife/lectures/Cryptophyta.html (514 words)

	Chromalveolates (Site not responding. Last check: 2007-11-07)
		The "chromalveolate hypothesis" posits the monophyly of alveolates (apicomplexans, dinoflagellates and ciliates), heterokonts, haptophytes and cryptomonads.
		One implication of the monophyly of chromalveolates is that the plastids in this group could share a common ancestor – derived from a single endosymbiosis.
		Growing support for the "chromalveolate hypothesis" has relied on a relatively small number of molecular studies to date, and a more thorough examination of this alliance has been undermined by a paucity of broad molecular data from several of its members, despite complete genome sequences from apicomplexans and ciliates.
	www.uga.edu /~protozoa/secabs/abstr/int/a7/a780.html (237 words)

	MEPS 130:179-199 (1996) (Site not responding. Last check: 2007-11-07)
		We detected significant relationships between the density of benthic micrograzers and small mussels, and the concentration of nutrients in individual pools with the abundance of pennate diatoms, cryptomonads and chlorophytes.
		Among the abiotic characteristics of the tidepools, there was a significant relationship between flushing rate and temperature of individual pools, with the abundance of cryptomonads and chlorophytes.
		We suggest that the factors that regulate phytoplankton assemblages in tidepools probably operate more at the scale of the individual pool rather than the intertidal zone.
	www.dec.ctu.edu.vn /cdrom/cd6/projects/marine_ecology_prog_ser/m130p179.abs.html (266 words)

	PID- Cryptomonas Introduction (Site not responding. Last check: 2007-11-07)
		Species are common in marine and freshwater plankton, but the cells often are not found in plankton samples because the usual fixatives do not preserve them - hence the common name cryptomonads ("hidden flagellates").
		The genus and its relatives have become notorious, because the cryptomonad plastid is the vestige of a eukaryotic endosymbiont, and because the confusing assemblage of structural features that cryptomonads possess has made it difficult to establish the phylogenetic relationships of the group.
		Postulated global eukaryote phylogeny based on presence or (ancestral) absence of mitochondria, and shape of mitochondrial cristae.
	www.bch.umontreal.ca /protists/crypt/introduction.html (103 words)

Try your search on: Qwika (all wikis)