
	Where results make sense

Topic: Purple bacteria

Related Topics

Heliobacteria

Green sulfur bacteria

Primary nutritional groups

Bacterium

Bacteriochlorophyll

Metabolism

NCBI

In the News (Sun 29 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Micrographia: Specimens: Bacteria (Monera). (Site not responding. Last check: 2007-10-05)
		Bacteria are dealt with in these pages under two headings: the classical bacteria as understood by earlier biologists, and the cyanobacteria, formerly known as the blue-green algae or cyanophyta, which are now classified amongst the Bacteria.
		The ability of the bacteria to process nitrogen is at least as important to the present state of life on Earth as the ability of plants to produce oxygen.
		The Bacteria cannot be identified using the microscope alone, but they have been traditionally divided into three groups on the basis of their microscopical appearance -- the cocci (spherical), the bacilli (rod-shaped), and the spiral forms.
	www.micrographia.com /specbiol/bacteri/bacter/bact0100.htm (1069 words)

	Phototrophic Prokaryotes Sequencing Project
		The aerobic phototrophic bacteria have puzzled microbiologists since their discovery in the late 1970s because, in contrast to related purple phototrophic bacteria, the aerobic phototrophic bacteria depend on the respiration of organic compounds for growth (Shiba et al.
		This is in contrast to purple bacterial signal transduction pathways that control photosystem synthesis during the transition from aerobic respiratory to anaerobic photosynthetic growth, and the transition from dark to light anaerobic growth (Masuda and Bauer 2002; Oh and Kaplan 2001).
		Thus, although the photosynthetic apparatus of the aerobic phototrophic bacteria is similar to those of the better-studied anoxygenic purple phototrophic bacteria (Yurkov and Beatty 1998), the regulation and ecophysiological function of the photosynthetic apparatus are very different and genomic analysis should reveal the reasons for these differences.
	genomes.tgen.org /rhodobacter.html (1232 words)

	Purple bacteria - Wikipedia, the free encyclopedia
		Like most other photosynthetic bacteria, purple bacteria do not produce oxygen, because the reducing agent involved in photosynthesis is not water.
		In some, called purple sulfur bacteria, it is either sulfide or elemental sulfur.
		Purple sulfur bacteria are included among the gamma subgroup, and make up the order Chromatiales.
	en.wikipedia.org /wiki/Purple_bacteria (231 words)

	[No title] (Site not responding. Last check: 2007-10-05)
		Proteobacteria is a nitrogen-fixing bacteria that converts inorganic nitrogen, which can be turned into the amino acids and nucleic acids of plants, after being absorbed through their roots.
		This is the broadest group of bacteria, and there are three main subgroups: purple bacteria, chemoautotrophic proteobacteria, and chemoheterotrophic proteobacteria.
		Purple bacteria use energy from the sun but extract electrons from substances other than water, and therefore release no oxygen.
	www.angelfire.com /ks3/kmeador/Bacteria.html (233 words)

	The Proteobacteria
		In contrast to this group is the Purple Non-sulphur bacteria, though these were originally named because it was thought that they could not use sulphide in their metabolism it is now known that they can if necessary.
		Bioluminescent bacteria are mostly associated with fish, either with live fish where they live in the light organs of these fish or with dead fish when they give them an eerie glow.
		In live fish the bacteria often live in spherical cells and as the light emitting reaction only occurs in the presence of oxygen the fish can control the light flashes or glows by controlling the oxygen flow to the cells containing the bacteria.
	www.earthlife.net /prokaryotes/proteo.html (2825 words)

	Purple Bacteria
		Purple bacteria are distinguished into the Chromataceae (formerly named Thiorhodaceae) and the Rhodospirillaceae (formerly called Athiorhodaceae).
		Purple bacteria perform an anoxygenic type II- photosynthesis which was until recently considered to be switched on exclusively under anaerobic conditions.
		The electron transport chain of purple bacteria minimally consists of an RCII, a cytochrome bc1-complex, the quinone pool and a small electron carrier mediating between the bc1-complex and the RCII.
	bip.cnrs-mrs.fr /bip09/purples.html (586 words)

	Purple sulfur bacteria - Wikipedia, the free encyclopedia
		The purple sulfur bacteria are a group of Proteobacteria capable of photosynthesis, collectively referred to as purple bacteria.
		The purple sulfur bacteria are divided into two families, the Chromatiaceae and Ectothiorhodospiraceae, which respectively produce internal and external sulfur granules, and show differences in the structure of their internal membranes.
		Purple sulfur bacteria are generally found in illuminated anoxic zones of lakes and other aquatic habitats where hydrogen sulfide accumulates and also in "sulfur springs" where geochemically or biologically produced hydrogen sulfide can trigger the formation of blooms of purple sulfur bacteria.
	en.wikipedia.org /wiki/Purple_sulfur_bacteria (299 words)

	Life History and Ecology of Bacteria
		Bacteria are so widespread that it is possible only to make the most general statements about their life history and ecology.
		Most bacteria may be placed into one of three groups based on their response to gaseous oxygen.
		Bacteria may also be classified both by the mode by which they obtain their energy.
	www.ucmp.berkeley.edu /bacteria/bacterialh.html (676 words)

	bacteria
		One example "strep throat" is caused by streptococcus bacteria, a long chain (strep) of round (coccus) bacteria.
		That is they kill the bacteria in the mouth and thus prevent plaque and tooth decay from occurring.
		Then you will use your understanding of types of bacteria and apply commonly used mouthwashes, toothpastes, soaps, etc. to observe their effectiveness on bacterial growth.
	www.und.nodak.edu /dept/jcarmich/102lab/labshtml/bacteria.html (1025 words)

	Antarctica Research
		Molecular probes specific to purple phototrophic bacteria, green sulfur bacteria, green non-sulfur bacteria and heliobacteria were designed in the course of the project and have been successfully used to screen a variety of environmental samples for these types of photosynthetic bacteria (see Available Resources below).
		A purple photosynthetic bacterium was isolated by the PIs from an Antarctic microbial mat (Madigan et al., 2000).
		Madigan, M.T. Isolation and characterization of psychrophilic purple bacteria from Antarctica, pg.
	www.science.siu.edu /microbiology/Antarctica/Research.html (1643 words)

	Bacteria
		Bacteria occur in almost every environment on Earth, from the bottom of the ocean floor, deep inside solid rock, to the cooling jackets of nuclear reactors.
		The bacteria that cause disease are heterotrophic parasites.
		Transformation- This method is when the bacteria collect parts of DNA that have been released into water of soil by the decomposing dead bacteria.
	bionerds.freeservers.com /about.html (1549 words)

	Proteobacteria
		The purple sulfur bacteria are generally beta or gamma proteobacteria, utilize sulfide as an electron donor and can tolerate high concentrations of sulfide.
		The purple nonsulfur bacteria are primarily alpha proteobacteria
		Purple nonsulfur bacteria are able to utilize sulfide as an electron donor, but cannot tolerate it at high concentration
	www.life.umd.edu /labs/delwiche/PSlife/lectures/Proteo.html (302 words)

	Bacteria (Eubacteria, or Typical Bacteria) (Site not responding. Last check: 2007-10-05)
		Although chlorophyll-based photosynthesis is widely distributed among the Bacteria, those that perform oxygenic photosynthesis form a phylogenetically monolithic group: all members of the cyanobacterial group share this physiology, and no organisms outside of the cyanobacteria have it.
		A muramic-acid-containing cell wall indicates that the organism is a member of the Bacteria, since this structure is not found among Archaea or Eucarya.
		Although chlorophyll-based photosynthesis is widely distributed among Bacteria, only the cyanobacteria and chloroplasts (which are phylogenetically part of the cyanobacterial group) are able to extract the required electrons from water (thereby releasing oxygen).
	lecturer.ukdw.ac.id /dhira/ClassAndPhylo/bacteria.html (1235 words)

	lagoon.html
		Purple-colored wastewater lagoons have less odor than conventional grayish lagoons because naturally occurring purple sulfur bacteria feed on ammonia and hydrogen sulfide, organic compounds that cause odor.
		This would entail hauling a load of wastewater from a purple lagoon to a non-purple lagoon.
		Livestock waste lagoons that contain purple sulfur bacteria, such as this dairy lagoon near Wahoo, produce less odor and have a purplish cast.
	ard.unl.edu /rn/0300/lagoon.html (556 words)

	Eubacteria
		Photoautotrophic bacteria synthesize their own organic compounds using sunlight as the energy source and carbon dioxide as the carbon source.
		Bacteria are prokaryotesno nucleus or other membrane-bound organelles.
		Green and purple bacteria use hydrogen sulfide and hydrogen gas as a source of electrons for photosynthesis.
	www.mercy.edu /faculty/knizeski/eubacteria.html (815 words)

	Bacteriology 102 - Purple Non-Sulfur Photosynthetic Bacteria
		Originally it was thought that these bacteria could not use hydrogen sulfide as an electron donor for the reduction of carbon dioxide when growing photoautotrophically, hence the use of "non-sulfur" in their group name.
		Chemotrophic growth for the purple non-sulfur bacteria is achieved by respiration, although there are some exceptional strains and species which can obtain energy by fermentation or anaerobic respiration.
		Enrichment and Isolation of Purple Non-Sulfur Photosynthetic Bacteria.
	www.splammo.net /bact102/102pnsb.html (1765 words)

	Genus Rhodospirillum - Purple photobacterium does not require sulfur.
		Purple sulfure bacteria - Chromatiaceae - anaerobe and phototropes; one sp.
		Families I and II need purple chlorophyll because they grow in stagnant bottom muds where only purple is needed to trap the light that got thru the dense top algae.
		The purple bacteria are mostly red to purple (orange and red, brown); but one species is green.
	www.disknet.com /indiana_biolab/b410a.htm (826 words)

	Rhodospirillum rubrum
		Rhodospirillum is a genus of photosynthetic bacteria of the family Rhodospirillaceae.
		This bacteria falls under the Alpha subdivision of the kingdom Proteobacteria (Brock pg.456).
		Phototrophic purple nonsulfur bacteria are used in sewage treatment processes, for biomass production as a source of animal food or agricultural fertilizer, and production of molecular hydrogen by evolution from nitrogenase.
	web.umr.edu /~microbio/BIO221_2000/Rhodospirillum_rubrum.html (601 words)

	Palaeos Bacteria: Glossary M-Z
		There are three major groups of photosynthetic bacteria: cyanobacteria, purple bacteria, and green bacteria.
		In green bacteria, the photosynthetic system is located in ellipoidal vesicles called chlorosomes that are independent of the cytoplasmic membrane.
		In purple bacteria, the photosynthetic system is located in spherical or lamellar membrane systems that are continuous with the cytoplasmic membrane.
	www.palaeos.com /Bacteria/Lists/Glossary/GlossM.html (1341 words)

	Bio 230 - Minitest 17
		Are killed by concentrations of sulfide that are used by green and purple sulfur bacteria.
		Color is a good criterion for the identification of isolates as either green bacteria or purple bacteria.
		In anoxygenic phototrophs, light is used primarily in the generation of ATP, and is not involved in the generation of reducing power as it is in organisms exhibiting oxygenic photosynthesis.
	www.geneseo.edu /~simon/bio230/mintst17.htm (706 words)

	Bacteriology 102 - Sample Lab Report
		In the first classification, there is further subdivision into the green sulfur bacteria, purple sulfur bacteria, and purple non-sulfur bacteria, all of which have a unifying characteristic in their ability to grow phototrophically (i.e., utilizing sunlight as a mode of energy generation) under anaerobic conditions.
		Purple non-sulfur bacteria exist mainly in anaerobic conditions that receive light, such as at the bottom of water sources.
		It is the purpose of this experiment to cultivate and isolate purple non-sulfur bacteria by selectively enriching the media used to provide good growth conditions and create additional selective pressure from various parameters, in order to narrow the range of strains seen.
	www.splammo.net /bact102/102labreport.html (1619 words)

	Analysis of Subfossil Molecular Remains of Purple Sulfur Bacteria in a Lake Sediment -- Coolen and Overmann 64 (11): ...
		Purple sulfur bacteria control the growth of aerobic heterotrophic bacterioplankton in a meromictic salt lake.
		Characterization of a dense, purple sulfur bacterial layer in a meromictic salt lake.
		A new purple sulfur bacterium from saline littoral sediments, Thiorhodovibrio winogradskyi gen. nov.
	aem.asm.org /cgi/content/full/64/11/4513 (6034 words)

	Absorption and CD spectroscopy and modeling of various LH2 complexes from purple bacteria Biophysical Journal - Find ...
		The photosynthetic purple bacteria are a widely studied group of photosynthetic bacteria.
		Although a high diversity is found among the species with respect to growth conditions, habitats, and cellular shape, the photosynthetic apparatuses of all species are quite similar.
		Isolation and characterisation of an unusual antenna complex from the marine purple sulphur photosynthetic bacterium Chromatium purpuraturn BW5500.
	www.findarticles.com /p/articles/mi_qa3938/is_200204/ai_n9039849 (499 words)

	Hydrogen production by means of an Artificial Bacterial Algal Symbiosis (Project ArBAS) (Site not responding. Last check: 2007-10-05)
		Purple bacteria: Of Ardley (a small island in the antarctica) up to Zagora (a desert at the edge of the sahara) they will be found.
		O to NH This is usually done in nature by a division of labor: Nodule bacteria obtain carbohydrates from the Leguminosa and they return the favour with synthetized nitrogen products.
		Purple bacteria and green algae are growing in a photo-bioreactor and produce solar hydrogen.
	www.bionik.tu-berlin.de /institut/xs2solar (363 words)

	Chloroflexus - MicrobeWiki (Site not responding. Last check: 2007-10-05)
		Chloroflexus aurantiacus, which is a facultative aerobic species of Chloroflexus, can do anoxygenic photosynthesis that has characteristics of both green sulfur bacteria and purple bacteria (both of which are not closely related to Chloroflexus) as well as cellular respiration in aerobic environments.
		The chlorosomes, like those in green sulfur bacteria, contain bacteriochlorophyll c; in addition, light-harvesting complexes containing bacteriochlorophyll a (like in purple bacteria) can be found within the cell membrane.
		Chloroflexus bacteria are phylogenetically and phenotypically distant from both green sulfur bacteria and purple bacteria.
	microbewiki.kenyon.edu /index.php/Chloroflexus (645 words)

	[No title] (Site not responding. Last check: 2007-10-05)
		It is used in areas of the world where bacteria and fungus is a problem.
		DNA sequence data from several non-nitrogen fixing bacteria, including E.coli (53), Haemophilus influenzae (54), Buchnera aphidicola (55), Neisseria gonnorhoeae,3 and Pseudomonas aeruginosa,4 reveal a region containing both chaperone genes and genes homologous to the Fe/S cluster maturation genes (nif genes) of nitrogen fixing bacteria.
		On Earth, such changes are often produced by terrestrial bacteria that derive their energy solely from the conversion of sulfur compounds from one form to another.
	www.lycoszone.com /info/sulfur--bacteria.html (452 words)

Try your search on: Qwika (all wikis)