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Topic: CAM plants

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	Crassulacean acid metabolism - Wikipedia, the free encyclopedia
		CAM is usually found in plants living under arid conditions, including those found in the desert (for example, cactus).
		Plants that are adapted to drier climates are called xerophytes.
		CAM plants uptake CO2 at night and change it into crassulacean acid that can be broken down during the day for sugars.
	en.wikipedia.org /wiki/CAM_plants (277 words)

	CO2 Respiration in C3, C4, and CAM Plants in Light and Dark Conditions
		CAM plants are known for their separation of light dependent reactions which occur during the day, and light independent reactions which occur at night, because of their existence in desert climates.
		Inversely, since we predicted that the light-independent reactions for CAM plants occur in the dark, we subtracted the average rate in the light from the rate in the dark.
		CAM plants are designed for environments in which extreme heat during the day and cooler temperature at night, and due to the need to conserve water in such an environment, the cells may react differently.
	www.colorado.edu /eeb/courses/1230jbasey/abstracts/1.htm (680 words)

	Photosynthesis (Site not responding. Last check: 2007-11-06)
		CAM is defined as a carbon concentrating mechanism (CCM) since decarboxylation of nocturnally accumulated organic acid generates high intracellular CO concentrations (1-2%).
		Indeed, the dogma that "CAM plants only open their stomata at night" is misleading, since well-watered plants engage in prolonged periods of Rubisco-mediated atmospheric CO fixation following decarboxylation (phase IV).
		CAM plants are typically leaf or stem succulents, which may be a pre-requisite of the pathway in order to buffer high vacuolar proton concentrations.
	www.plantsci.cam.ac.uk /Maxwell/researchb.html (764 words)

	Botany online: Photosynthesis - C3, C4 and CAM. Regulation of The Activity
		CAM is the abbreviation of Crassulacean acid metabolism.
		plants comes in useful under high light intensities, is the degree of the CAM influence in CAM plants regulated mainly by temperature, atmospheric humidity and salinity.
		CAM plants that store a lot of malate and due to the thus high osmotic value also a lot of water, are usually less frost resistant than C
	www.biologie.uni-hamburg.de /b-online/e24/24b.htm (1281 words)

	Introduction: (Site not responding. Last check: 2007-11-06)
		We placed the C3, C4, and CAM plants in a gas chamber attached to a CO probe.
		CAM plants are use to dry, hot environments.
		Perhaps cooler temperatures signal photosynthesis in CAM plants, not the absence of light.
	spot.colorado.edu /~basey/nwaibel.html (525 words)

	News: âNight-timeâ photosynthesis helps plants survive
		Plants growing in the tops of forest canopies are able to survive thanks to a special type of ânight-timeâ photosynthesis, according to latest research by Oxford plant scientists, recently published in Proceedings of the National Academy of Sciences USA ( PNAS).
		These plants, called epiphytes, have a relatively stressful existence, even in tropical rain forests, as they can be exposed to the severe drying effects of full sunlight, high temperatures and continual air movement.
		This enables plants to conduct most of their gas exchange with the atmosphere at night, when the air is relatively cool and humid, rather than during the day as in most plants.
	www.admin.ox.ac.uk /po/040713.shtml (473 words)

	PlPa 3002 Air Pollution, People&Plants (Site not responding. Last check: 2007-11-06)
		C4 plants : Plants that use PEP (phosphoenol pyruvate) carboxylase during initial carbon fixation to make a four-carbon compound that is subsequently transferred to specialized cells where carbon dioxide is internally released and refixed using rubisco.
		CAM plants : Plants that close their stomata during the day to reduce water loss and open them at night for carbon uptake.
		In plants that have their sulfur requirement satisfied, additional overload due to exposure to sulfur dioxide from the air can lead to injury and growth and yield losses.
	www.plpa.agri.umn.edu /~sagark/exams.html (2744 words)

	CAM plants (Site not responding. Last check: 2007-11-06)
		CAM is an acronym for the name of the plants that have this type of photosynthesis and generically describes the type of metabolism.
		CAM plants open their stoma at night when it is cooler and less evaporation occurs and close them during during the day.
		The CAM plants solve this problem by using CO to make acid molecules that are stored in the vacuole.
	homepage.smc.edu /hodson_kent/Energetics/CAM.htm (326 words)

	Encyclopedia: CAM plants
		The carbon stored during CAM eventually enters the Calvin cycle.
		Glycolate isn't as useful to plants as PGAL is, since they create food and structures out of PGAL, while glycolate just gets sent off to peroxisomes.
		are both ways that plants help supplement their carbon levels to prevent this from happening.
	www.nationmaster.com /encyclopedia/CAM-plants (308 words)

	Learn more about Carbon in the online encyclopedia. (Site not responding. Last check: 2007-11-06)
		During photosynthesis, the carbon that becomes fixed in plant tissue is significantly depleted in C-13 relative to the atmosphere.
		There is two mode distribution in the dC-13 values of terrestrial plants resulting from differences in the photosynthetic reaction used by the plant.
		A second category of plants (C4 pathway plants), composed of aquatic plants, desert plants, salt marsh plants, and tropical grasses, have dC-13 values that range from -6 to -19.
	www.onlineencyclopedia.org /c/ca/carbon.html (1709 words)

	The Element Carbon -- Carbon Atom
		plant tissue is significantly depleted in C-13 relative to the atmosphere.
		C4 pathway plants), composed of aquatic plants, desert plants, salt marsh plants, and tropical grasses, have dC-13 values that range from -6 to -19.
		CAM plants) composed of algae and lichens has dC-13 values range from -12 to -23?.
	www.worldofmolecules.com /elements/carbon.htm (1318 words)

	Bio 120
		To a Plant, Carbon Fixation is by far the preferred reaction, but as the CO concentration of the atomosphere (0.03%) is very much lower than the oxygen concentration (20%), photorespiration does occur at significant levels.
		Plants that utilize CAM use an identical biochemical process to the C4 plants, including use of the enzyme PEP Carboxylase to intially fix CO to Phosphoenol Pyvuvate ( PEP) for later release.
		CAM plants close their stomata during the day and usually only open them at night.
	bioweb.wku.edu /courses/Biol120/images/C4.htm (633 words)

	Abstract (Site not responding. Last check: 2007-11-06)
		In this experiment, photosynthesis of CAM plants was tested at different temperatures with a carbon dioxide sensor to determine temperature’s effects on photosynthetic rates.
		In CAM plants, carbon fixation and the Calvin cycle are separated for a short amount of time allowing the Calvin cycle to occur during the day and the carbon dioxide uptake to occur at night, when the conditions in the environment are cooler.
		Results indicated that rate of photosynthesis or negative change in CO concentrations was the lowest at 2 degrees Celsius (the lowest temperature) with a value of.463 ppm and that the photosynthetic rate was the greatest at 80 degrees Celsius (The greatest temperature) with a value of -25.
	spot.colorado.edu /~basey/ca.htm (441 words)

	Photosynthesis and C3 vs. C4 plants (Site not responding. Last check: 2007-11-06)
		Plants bring water up from their roots, and take up CO2 from the air through stomata in their leaf surfaces.
		The H2O molecule is smaller than the CO2 molecule, and the plant’s leaf tissue is generally warmer than the surrounding air, so whenever the stomata are open for CO2 uptake, the plant loses water through evapotranspiration.
		C4 plants fix CO2 into 4-carbon carboxylic acid, which reduces the effective concentration of CO2 within the leaf, creating a steeper gradient for CO2 into the leaf compared to the gradient for H2O out from the leaf.
	www.umt.edu /geograph/edlund/g346/C3C4.html (553 words)

	C4 and CAM Cycles (Site not responding. Last check: 2007-11-06)
		But in hot, dry, environments that are heavily-populated with plants, where the local carbon-dioxide content of the atmosphere is greatly reduced, selection should have resulted in a few adaptations to overcome photorespiration.
		plants are enlarged and their chloroplasts have much higher chlorophyll levels (looking darker!) to drive the Calvin cycle...compared to their mesophyll cells that are using limited light reactions to drive mostly the PEP carboxylase and regeneration cycles.
		In a very clear way, CAM plants are "spinning their wheels" using a lot of energy to go almost nowhere.
	koning.ecsu.ctstateu.edu /Plant_Physiology/c4cam.html (1425 words)

	TOPS Photosynthesis Lab, Part I, Student Handout
		These plants attach CO to the 5 carbon sugar RUBP (ribulose bisphosphate) with the assistance of the enzyme RUBP carboxylase which will then be converted into sugar.
		2 CAM plants- succulents (1 in sun for 24 hours and 1 in dark for 24 hours), scissors, mortar and pestle, sand, distilled H20, 10 mL pipette, pipette pump, wash bottle (distilled water), beaker to wash pH meter electrode, 30 mL beakers, stirring rod, grease pencil.
		In this lab we will determine which of the CAM plants tested was left in the dark for 24 hours or left in the sunlight for 24 hours.
	departments.oxy.edu /tops/Photosynthesis/photosynstudent1.htm (307 words)

	c4cam (Site not responding. Last check: 2007-11-06)
		In C4 plants, however, the vascular tissue is surrounded by an additional ring of bundle sheath cells that are closely connected with the spongy mesophyll (Taiz, Figs 8.9 and 8.10).
		CAM idling --this is a cool phenomenon that happens with plants that shut their stomates for a long period of time.
		This is a slow process, and plants require around 10 days to produce leaves and gain C. Something similar to CAM idling occurs in some desert C3 species that keep their stomates shut for extended periods of time, such as the ocotillo bush with its small leaves.
	www.acad.carleton.edu /curricular/BIOL/classes/bio359/study%20guides/c4%20cam/8c4cam.html (2504 words)

	CaM Genes in Plants (Site not responding. Last check: 2007-11-06)
		We are examining the organization, the patterns of expression, and regulation of the genes encoding calmodulin ( Cam) in Arabidopsis thaliana.
		Recently, a seventh Cam sequence was identified by searching the Arabidopsis thaliana EST database.
		We are currently trying to determine whether the Arabidopsis Cam sequences are differentially expressed at the level of cell-type by using the promoters of the genes to drive the expression of an E.
	www.life.uiuc.edu /zielinski/camgenes.htm (330 words)

	CAM plants (Site not responding. Last check: 2007-11-06)
		Cam Plants are the plants which are found in the desert for example cactus.
		The speciality about these plants is that their Stomata are closed during the day time in order to conserve water and in such a way they can't carryout out the photosynthesis since carbondioxide wouldn't be available as their stomata is closed.
		Therefore their stomata are open during the night time and they inhale carbondioxide.
	www.enlightenweb.net /c/ca/cam_plants.html (68 words)

	AP Biology - James Madison Memorial High
		Discuss the evolution of primitive vascular plants by giving the characteristics of the Lycophyta, Sphenophyta, and Pterophyta and noting what major advancements they have over the Bryophytes.
		State what is meant by primary and secondary growth in vascular plants and describe the sequence of events in primary growth of a stem vs. secondary growth.
		Know the major differences (chemical and structural) in C3, C4, and CAM plants and the conditions under which each takes place.
	www.madison.k12.wi.us /jmm/plants.htm (766 words)

	Biology 152: Molecules and Cells: Exam IV key, Spring 2002
		C3 plants use the Calvin cycle to produce carbohydrates; C4 and CAM plants do not.
		C4 and CAM plants are somewhat disadvantaged under relatively cool, moist conditions, because even C3 plants don’t waste a lot of energy on photorespiration under these circumstances.
		If ATP is not wasted on photorespiration, then C4 and CAM plants use more ATP to make a molecule of glucose than C3 plants do, because C4 and CAM plants use ATP to shuttle CO2.
	people.hws.edu /bkbaxter/bio152web_fall02/exams/ExamIV.htm (1360 words)

	Winter Lab
		Würth MKR, Winter K, Körner C (1998) In situ responses to elevated CO in tropical forest understory plants.
		In: Mulkey SS, Chazdon RL, Smith AP (eds) Tropical forest plant ecophysiology.
		Winter K, Troughton JH (1978) Photosynthetic pathways in plants of coastal and inland habitats of Israel and the Sinai.
	striweb.si.edu /winterlab/publications.html (5280 words)

	CAM plants
		To prevent water loss, the stomata of these plants are closed by day, to open only at night when temperature decreases and humidity rises.
		This mechanism was discovered first in Crassulacean plants, such as Crassula and therefore is called Crassulacean Acid (acid: malate) or CAM Metabolisme.
		This type of metabolism appeared to occur not only dicot plants, but also in a number of monocots, among others the crop pineapple and the pot plant Sanseveria.
	www-vcbio.sci.kun.nl /eng/virtuallessons/leaf/cam-plants (201 words)

	Photosynthesis III - C3, C4, and CAM photosynthesis
		In addition to the material below, you should also be familiar with the material from the previous two study guides because the final is cumulative.
		How is CAM photosynthesis similar to and different from both C3 and C4?
		What steps are important in plant assimilation of nitrogen and how does this differ among the different available forms?
	fire.biol.wwu.edu /hooper/203sg3.html (651 words)

	C4 Plants
		They all use a supplementary method of CO uptake which forms a 4-carbon molecule instead of the two 3-carbon molecules of the Calvin cycle.
		(CAM stands for c rassulacean a cid m etabolism because it was first studied in members of the plant family Crassulaceae.)
		CAM plants take in CO through their open stomata (they tend to have reduced numbers of them).
	users.rcn.com /jkimball.ma.ultranet/BiologyPages/C/C4plants.html (807 words)

	C3, C4 Photosynthesis, and CAM
		Brown, R. A difference in N efficiency in C3 and C4 plants and its implications in adaptation and evolution.
		Hydrogen-isotope composition of leaf water in C3 and C4 plants: its relationship to the hydrogen-isotope composition.
		Isotopic composition of cellulose from C3, C4, and CAM plants growing near one another.
	www.cnr.uidaho.edu /ecophysiology/c3c4.htm (1332 words)

	BIOL 111 Lecture 10
		Provides the basis of all life on earth because the world's food chains are based on plant food.
		Most plants possess PEP carboxylase in at least small quantities; it adds CO to PEP to form oxaloacetate.
		Plants that possess large quantities of this enzyme usually have structurally different leaves than C
	www.puc.edu /Faculty/Bryan_Ness/b111l10.htm (1905 words)

	CAM plants and the C4 pathway (Site not responding. Last check: 2007-11-06)
		What you need to know is that plants living in hot, dry environments have worked out a way to minimize water loss during the day; but that this process also prevents carbon dioxide from entering the plant.
		Instead, they allow carbon dioxide to enter at night and fix it into a 4 carbon compound using the C4 pathway (crabgrass, sugarcane and corn for example); or in desert plants in the form of crassulacean acid (CAM plants which is short for Crassulacean Acid Metabolism).
		During the day, both types of plants use the carbon processed the night before for photosynthesis.
	trc.ucdavis.edu /biosci10v/bis10v/week3/camc4plants.html (198 words)

	Welcome to the Department of Plant & Soil Science
		We have a distinguished faculty who are not only nationally and internationally known in their research areas, but who are also excellent teachers who take special pride in advising and mentoring students.
		At the undergraduate level, we offer majors in landscape horticulture, plant science, plant biology, and environmental soil science.
		The department is fortunate to have outstanding facilities, including well-equipped teaching, research, and computer laboratories, high tech classrooms, state-of-the-art greenhouses and plant growth chambers, a ten acre botanic garden, an agricultural sciences library, pleasant areas for students to study and socialize, and a 350 acre farm.
	ag.udel.edu /departments/plsc/staff/frett/PLSC%20101/Finals/99%20Final.htm (410 words)

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