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Basic Plant Science: Plant Processes Notes Basic Plant Science: Plant Processes Notes Date _______________Topic___________________________________ -----------------------------------------Notes------------------------------------- -- Photosynthesis: - ----------------------------------------- ----------------- Environmental Factors: Main Ideas, Key Points, Formulas Points, Key Ideas, Main ------------------------------------------- ----------------------------------------------------Summary of Main Ideas-------------------------------------------------- ------------ Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes Notes -----------------------------------------Notes------------------------------------- - Xylem: Stomata: ------------------------------------------- Formulas Respiration: ----------------- Main Ideas, Key Points, Points, Key Ideas, Main ------------------------------------------- ----------------------------------------------------Summary of Main Ideas-------------------------------------------------- ------------ Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes Notes -----------------------------------------Notes------------------------------------- - Transpiration: ------------------------------------------- Formulas ----------------- Main Ideas, Key Points, Points, Key Ideas, Main ------------------------------------------- ----------------------------------------------------Summary of Main Ideas-------------------------------------------------- ------------ Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes Notes -----------------------------------------Notes------------------------------------- - Absorption: ------------------------------------------- Formulas ----------------- Main Ideas, Key Points, Points, Key Ideas, Main ------------------------------------------- ----------------------------------------------------Summary of Main Ideas-------------------------------------------------- ------------ Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes BPS2.1 Virtual Plant Transpiration Lab Student Instruction Sheet for Independent Work on Website Question: What factor affects the transpiration rate in plants? Purpose: In this investigation the student will compare the rates of transpiration for several plant species under varying environmental conditions. You will investigate the effect of environmental factors (heat, light, and wind) on the transpiration rate. Objectives: • Describe the process of transpiration in vascular plants. • Investigate the effect of various environmental factors on the transpiration rate in plants. Procedure: • Pick a plant sprig on the “shelf.” There are nine (9) different plant types used in this lab. • Bring the spring to the photometer on the table. The names of the various plants are listed on the corresponding table provided. • Set a clock to “start” the transpiration process. The clock will simulate time passing for one hour. You may use 10 seconds. • At the end of the hour, the amount of water transpired by the plant, in milliliters, will be on the photometer read-out. An instructor answer key provides you with the correct milliliters to give to students if you do not have a computer. • Drag one of the three appliances (heater, fan or lamp) from the lab bench to the table and drop next to the photometer. • Begin clock again. Use 10 seconds to simulate the passing of one hour. Record rate, in milliliters, of transpiration. • Repeats steps above until all data has been collected for each plant under the four experimental conditions. a. Control, no appliances b. Heater c. Fan d. Lamp • Complete journal analysis questions. Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes BPS2.1 Virtual Plant Transpiration Lab Normal With Fan With Heater With Lamp Arrowhead Coleus Devil’s Ivy Dieffenbachia English Ivy Geranium Rubber Plant Weeping Fig Zebra Plant Journal Analysis Questions Complete once all information has been filled in the grid above. 1. Describe the process of transpiration in vascular plants. 2. Describe any experimental controls used in the Investigation. 3. What environmental factors that you tested increased the rate of transpiration? Was the rate of transpiration increased for all plants tested? 4. Did any of the environmental factors (heat, light, or wind) increase the transpiration rate more than the others? Why? 5. Which species of plants that you tested had the highest transpiration rates? Why do you think different species of plants transpire at different rates? Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes BPS2.1 6. Suppose you coated the leaves of a plant with petroleum jelly. How would the plant's rate of transpiration be affected? 7. Of what value to a plant is the ability to lose water through transpiration? Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes BPS2.1 KEY Virtual Plant Transpiration Lab Student Instruction Sheet for Independent Work on Website Question: What factor affects the transpiration rate in plants? Purpose: In this investigation the student will compare the rates of transpiration for several plant species under varying environmental conditions. You will investigate the effect of environmental factors (heat, light, and wind) on the transpiration rate. Objectives: • Describe the process of transpiration in vascular plants. • Investigate the effect of various environmental factors on the transpiration rate in plants. Procedure: • Pick a plant sprig on the “shelf.” There are nine (9) different plant types used in this lab. • Bring the spring to the photometer on the table. The names of the various plants are listed on the corresponding table provided. • Set a clock to “start” the transpiration process. The clock will simulate time passing for one hour. You may use 10 seconds. • At the end of the hour, the amount of water transpired by the plant, in milliliters, will be on the photometer read-out. An instructor answer key provides you with the correct milliliters to give to students if you do not have a computer. • Drag one of the three appliances (heater, fan or lamp) from the lab bench to the table and drop next to the photometer. • Begin clock again. Use 10 seconds to simulate the passing of one hour. Record rate, in milliliters, of transpiration. • Repeats steps above until all data has been collected for each plant under the four experimental conditions. e. Control, no appliances f. Heater g. Fan h. Lamp • Complete journal analysis questions. Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes BPS2.1 KEY Virtual Plant Transpiration Lab *All measured in 21 degrees Celsius Normal With Fan With Heater With Lamp Arrowhead 0 7.5 6.6 4.0 Coleus 0 6.0 3.9 3.0 Devil’s Ivy 0 4.6 4.1 3.0 Dieffenbachia 0 7.7 6.0 3.9 English Ivy 0 5.1 3.2 2.1 Geranium 0 4.7 5.8 2.4 Rubber Plant 0 8.4 6.8 4.3 Weeping Fig 0 6.1 4.9 2.5 Zebra Plant 0 7.6 6.1 3.2 Journal Analysis Questions Students complete once all information has been filled in the grid above. 1. Describe the process of transpiration in vascular plants. Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. Transpiration is essentially evaporation of water from plant leaves. 2. Describe any experimental controls used in the Investigation. Controls used were the temperature (21 degrees Celsius), the same equipment used (fan, heater and lamp). 3. What environmental factors that you tested increased the rate of transpiration? Was the rate of transpiration increased for all plants tested? All three environmental factors tested increased the rate of transpiration. The rate increased for all plants tested. 4. Did any of the environmental factors (heat, light, or wind) increase the transpiration rate more than the others? Why? Basic Plant Science BPS2 Plant Processes Basic Plant Science: Plant Processes BPS2.1 KEY The fan consistently increased the rate the most, second was the heater and last was the lamp. The reason for this is because by using the fan, the air movement created by the fan sped up the rate of transpiration the fastest. The moisture was pulled out of the plant cells faster because of the air movement. 5. Which species of plants that you tested had the highest transpiration rates? Why do you think different species of plants transpire at different rates? The rubber plant, under the fan conditions had the highest transpiration rate. Different species of plants transpire at different rates because each of them are made differently. Some have thick tissue on their leaves, while others have thin tissue. Some have larger surface area on their leaves, while others are smaller. The rubber plant had the largest surface area of all the plants tested in this experiment. 6. Suppose you coated the leaves of a plant with petroleum jelly. How would the plant's rate of transpiration be affected? Petroleum jelly would inhibit the loss of moisture out of the stomata cells. Therefore, the rate of transpiration would be decreased. Essentially, the surface of the leaf wouldn’t be able to “breath” nearly as fast with a jelly coating. 7. Of what value to a plant is the ability to lose water through transpiration? A plant has to lose some of its moisture, or else the leaves and tissues become water- logged. A water-logged plant is an unhealthy plant because, essentially, they are
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