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Topic: Potometer

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	Potometer
		A potometer is a device used for measurung the rate of water uptake of a leafy plant shoot.
		Potometers are notoriously difficult to set up, because air bubbles in the xylem of the plant or in the apparatus itself will prevent the device from working porperly.
		Potometers come in a variety of designs, but all follow the same basic principle.
	www.ebroadcast.com.au /lookup/encyclopedia/po/Potometer.html (0 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		A potometer is a device used for measuring the rate of water uptake of a leafy shoot.
		Potometers are often difficult to set up, as measurement-altering air bubbles in the xylem of the plant or in the apparatus must be eliminated.
		The mass potometer consists of a plant with its root submerged in a beaker.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=potometer (0 words)

	Comparison of transpiration rates
		A potometer is a piece of apparatus used to measure the rate of water loss from a plant (transpiration).
		This is because the volume of water involved in metabolic processes is insignificant compared to the large volume constantly flowing through the plant in the transpiration stream.
		When potometer and atmometer results are different this indicates that stomata in the leaves are reacting to their surroundings and controlling water loss while the non-living surface of the atmometer simply reflects the evaporating power of the atmosphere.
	www-saps.plantsci.cam.ac.uk /worksheets/scotland/poto.htm (0 words)

	Bubble Potometer,Laboratory Potometer,Bubble Potometer Equipment,Laboratory Potometer Suppliers (Site not responding. Last check: )
		A Potometer is a device, similar to a phytometer, and is used for measuring transpiration.
		Mass Potometer: This type of equipment has a plant with its root immersed in a beaker, the beaker is then placed on to a digital balance, for reading the amount of water lost by the plant.
		Potometers are available in different designs but all of them are based on the same principle.
	www.laboratoryequipmentworld.com /potometer.html (304 words)

	DEVELOPMENT OF AN ELECTRONIC POTOMETER FOR STUDYING PLANT WATER USE IN REAL TIME
		This potometer enables the immediate, real-time evaluation of continuous changes in plant water use in response to modifications in the environments of the roots or shoots.
		The potometer embodies an old method whereby whole plant roots or detached leaf petioles are immersed in water and the reduction in water level is taken to represent the water used (Pfeffer, 1881; Kaldenhoff et al., 1998).
		Some of the original potometers had very low resolution (So et al., 1976) and were able to use detached plant organs only, and had a short range of linearity or had to be used over an extended period of time (Lervine et al., 1996; Zwieniecki and Boersma, 1997).
	www.plantstress.com /methods/Potometer/Potometer.htm (3226 words)

	Potometer - Definition, explanation
		A potometer is a device used for measuring the rate of water uptake of a leafy plant shoot.
		By changing the surrounding atmospheric conditions, the effect on transpiration of wind, heat, and humidity can be measured.
		Potometers are notoriously difficult to set up, because air bubbles in the xylem of the plant or in the apparatus itself will prevent the device from working properly.
	www.calsky.com /lexikon/en/txt/p/po/potometer.php (0 words)

	Lab 9 Transpiration by Merissa Ludwig
		Remove the root from the rest of the plant and insert the plant into the parafilm hole so that the end of the stem is below the water level in the graduated cylinder.
		Weigh the potometer with the plant and record the initial mass.
		When using potometers, sealing the potometers was difficult affecting the rate of water loss.
	sps.k12.ar.us /massengale/lab_9_transpiration.htm (0 words)

	Public Domain Content: Potometer (Site not responding. Last check: )
		The Basic Design of a Potometer Potometers come in a variety of designs, but all follow the same basic principle.
		Using a Potometer Allow the bubble time to round the corner and start at the beginning of the mm scale.
		The usual conditions to try is placing the plant in a bright light, placing it by a fan,and placing it in a humid atmosphere.
	www.publicdock.com /How-to/Potometer.shtml (425 words)

	tw
		MATERIALS (per group): Potometer (ring stand, 2 clamps, 0.01 ml pipette, 1 ml pipette, 2 rubber stoppers, clear plastic tubing, two-way connectors), conifer twigs, marking pen, clock with a second hand, metric ruler, 200 watt lamp, fan.
		The effect of each of these factors on transpiration rates can be demonstrated on summer-active plants with the use of a potometer.
		The water column from the pipette through the rubber stopper to the twig must be unbroken with no air bubbles.
	www.oswego.edu /wscp/tw.htm (0 words)

	Qubit Systems: POTOMETER
		The Potometer may be used by itself or in conjunction with Qubit's S161 Humidity and Temperature Sensor to measure changes in plant transpiration rate as environmental and physiological conditions change.
		One end of a sealed vinyl tube is attached to the instrument, the other end to the cut stem of a plant.
		The tube contains an air bubble in contact with the Potometer and an unbroken column of water in contact with the cut end of the plant stem.
	www.qubitsystems.com /Merchant2/merchant.mvc?Screen=PROD&Store_Code=QS&Product_Code=S191 (176 words)

	LabBench
		A potometer is a device that measures the rate at which a plant draws up water.
		Since the plant draws up water as it loses it by transpiration, you are able to measure the rate of transpiration.
		Your instructor will show you how to assemble your potometer.
	www.phschool.com /science/biology_place/labbench/lab9/design.html (0 words)

	[No title]
		An instrument used to measure transpiration is called a potometer; a simple potometer will be used in this exercise.
		Put the potometer in a well-lighted area near a fan or open window.
		Photosynthesis and Starch Synthesis in Variegated Coleus Leaves Variegated Coleus leaves are particularly well adapted for demonstrating the necessity of chloroplasts for photosynthesis since the center of the leaf lacks chloroplasts.
	www.oglethorpe.edu /faculty/~c_baube/documents/PlantPhys07.doc (1144 words)

	Lab 9: Transpiration (Site not responding. Last check: )
		A potometer is a device that measures the rate at which a plant draws up water.
		Since the plant draws up water as it loses it by transpiration, you are able to measure the rate of transpiration.
		Set up four potometers to measure the rate of transpiration of four different scenarios.
	www.ekcsk12.org /science/aplabreview/lab09.htm (294 words)

	transpiration
		A leafy shoot is cut under water and fixed to the potometer.
		When you get the potometer out of the water, you flood the apparatus to sweep out air bubbles by opening the tap of the air funnel.
		A potometer really measures the rate of water intake rather than transpiration.
	library.thinkquest.org /C0118022/transpiration.htm (852 words)

	Re: Create an experiment showing how light & temperature affects transpiration
		Another common technique is the potometer (see websites under references).
		The advantage of a potometer is that it can give rapid results.
		Your treatments of light and dark are reasonable but having cold, warm and hot treatments in the dark probably will not give much difference because stomata close in the dark.
	www.madsci.org /posts/archives/jun2001/991864369.Bt.r.html (528 words)

	Transpiration
		In this lab you will be using a potometer to measure the amount of transpiration taking place from a small branch with leaves attached.
		Develop a way to test the different transpiration rates between different plants or what might cause different rates of transpiration amoung a sigle species of plants.
		Take some clear finger nair polish and paint the lower surface of the leaves you used in your potometer.
	www.accessexcellence.org /MTC/96PT/Share/brown.html (519 words)

	Potometer
		The amount of water taken up by a plant can be investigated using an instrument using a potometer.
		The potometer investigation generates consistent and realistic results, showing the uptake of water by a photosynthesising plant, from which the rate of transpiration is automatically calculated.
		The Potometer simulation has been provided by Actis Ltd, the educational website company.
	www.mikecurtis.org.uk /Potometer/potometer.html (435 words)

	The Potometer
		The stomata may be opened or closed in order to limit the amount of water-loss experienced by a plant.
		The amount of water lost by a plant may be investigated experimentally using a Potometer:
		The shoot must be cut and inserted into the reservoir underwater.
	www.dr-evans.com /advancedbiology/potometer.html (346 words)

	Talk:School science/Potometer - Wikibooks, collection of open-content textbooks
		2004-12-11 06:22:14 User:Walkiped m (→The basic design of a potometer - spelling - reservoir)
		2004-09-24 21:36:15 User:Joseph Philipsson m (→The basic design of a potometer - - Two speeling corrections)
		2003-06-20 10:57:01 User:Theresa knott (Adding a "using a potometer" Section.
	en.wikibooks.org /wiki/Talk:School_science/Potometer (0 words)

	Plant Physiological Apparatus, manufacturers, exporter, suppliers, India
		Potometer for observing the rate of absorption of water by transpiring plants under varying circumstances, complete.
		Potometer, Farmer's Soda Glass bottle, borosilicate glass fitting.
		A capillary tube with funnel at top and scale attached.
	www.jindalmedical.com /laboratory-glasswares/Plant-Physiological-Apparatus.htm (200 words)

	Potometer Demonstration Model (Site not responding. Last check: )
		Transpiration, or water loss through the surface of a leaf, is part of the process by which water moves up a plant from roots to leaves.
		Now you can re-create and observe the process in your own lab, with this easy-to-use potometer.
		Using any terrestrial plant and the apparatus, you can vary the light intensity, humidity, wind, or other environmental factors to determine the effect each has on transpiration.
	www.wardsci.com /product.asp?pn=IG0011724 (139 words)

	Definition of potometer - Merriam-Webster Online Dictionary
		Learn more about "potometer" and related topics at Britannica.com
		Find more about "potometer" instantly with Live Search
		See a map of "potometer" in the Visual Thesaurus
	www.merriam-webster.com /dictionary/potometer (0 words)

	POTOMETER (PLANT TRANSPIRATION) DEMO.
		You are here: > Plant Activities > Plant Activity Books, References, DVDs and Videos > POTOMETER (PLANT TRANSPIRATION) DEMO.
		A standard method for measuring water loss in plants, potometers yield quick, quantitative results.
		Use different plant species to study the rate of transportation under varying conditions of temperature, humidity, light and wind.
	www.acornnaturalists.com /store/POTOMETER-PLANT-TRANSPIRATION-DEMO-P4099C54.aspx?UserID=330637 (0 words)

	de Hortus
		Je kunt de verdampingssnelheid van de bladeren indirect meten met een potometer (zie afbeelding).
		De wateropname-snelheid wordt gemeten door een luchtbel in te laten aan het eind van het capillair en te meten hoe lang de luchtbel erover doet om over een bepaalde afstand te bewegen.
		Let op: Leerlingen moeten zèlf een potometer bouwen en zèlf de materialen bijeen brengen!
	www.dehortus.nl /vo_waterhuishouding.asp (0 words)

	Potometer
		Some students should give reasons why a factor such as light intensity affects the rate of transpiration
		The potometer investigation generates consistent and realistic results, showing the uptake of water by a photosynthesising plant, from which the rate of transpiration is automatically calculated.
		A feature draws and print graphs of the data in order to show how transpiration is affected by various environmental factors.
	www.sycd.co.uk /can_we_should_we/explore/plants/potometer.html (0 words)

	Potometer
		The potometer uses the Pressure (Differential) sensor and an accessory pack to measure the transpiration rate of a plant leaf.
		A large dock leaf, for example, is attached to a water-filled tube, which is then arranged with a small syringe, to damp the pressure changes, and the Pressure (Differential) sensor can then log the steady use of water by a leaf.
		Abington House, 146 London Road West, BATH, BA1 7DD, UK Sales and Technical Support 01225 850020
	www.sciencescope.co.uk /potometer.htm (0 words)

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