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Transpiration

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Transpiration - Water Movement through Plants

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Transpiration - Introduction

Welcome to a lesson that will examine how water moves through plants. Plants lose gallons of water every day through the process of transpiration, the evaporation of water from plants primarily through pores in their leaves. Up to 99% of the water absorbed by roots is lost via transpiration through plant leaves. How and why do they do it? How do the plants avoid losing too much water? What environmental conditions control water loss? An animation with the following text provides a visual tool for you to understand these processes as well.

Click to see an animation of transpiration in plants.

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This project was supported in part by the National Research Initiative Competitive Grants CAP project 2011-68002-30029 from the USDA National Institute of Food and Agriculture, adminstered by the University of California-Davis and by the National Science Foundation (NSF), Division of Undergraduate Education, National SMETE Digital Library Program, Award #0938034, administered by the University of Nebraska. Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the USDA or NSF.