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Plant Transpiration

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by

Nuria Alonso

on 30 November 2012

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Transcript of Plant Transpiration

Background Procedure Data Calculations Conclusion Core Celery Lab 15 leaves on both plants
saturated the bulbs with 75mL of water and wrapped in ziploc bags
Plant A is humidity, plant B is humidity + wind
sprayed big ziplocs with water 4x and covered the whole plant Plant Transpiration Percent Change Transipiration Rates:
Plant A- .004732 g/hour/cm
Plant B- .00659 g/hour/cm Kristen, Nuria, and Andrew Celery 1 (w/ leaves): 370.8g
Celery 2 (w/o leaves): 381.5g Celery 1: 368.8g
Celery 2: 378.1g Celery 1: 89.9%
Celery 2: 54% % Change in mass What is transpiration? Enviornmental factors: http://users.rcn.com/jkimball.ma.ultranet/Biologypages/t/transcription.html Hypothesis: If a plant is in a humid environment with wind
it will transpire more than a plant in just a humid environment. Prediction: The plant in the wind environment will transpire more. Controls:
humidity
temperature
light Independent Variable:
wind
Dependent Variable:
transpiration rate Plant A Plant B Day 0-1 Day 1-2 Day 2-3 2 2 5.172% 6.298% 6.170% 7.427% 9.158% 10.797% Class Control Weights Plant A and Plant B weights Stomata average Hypothesis was correct. Plant B in the wind and humidity transpired more than Plant A in just humidity. The transpiration rate of Plant B was .oo1858g/hour/cm more than Plant A. Also the total percent changes of Plant A was 17.60%, Plant B was 27.44%, control 31.84%. 2
Follow Up Experiment Control in only light and one with light and wind. This will allow us to test how much wind effects transpiration without humidity. Errors Sealing the environments
regulating external variables (temp., light, etc.) We are 95% confident that the average rate of change for plant A was statistically significantly lower than the control. However there is insufficient data to support that Plant B had a statically significant difference to the control.
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