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TeachMeFinance.com - explain water stress effect water stress effect The term 'water stress effect' as it applies to the area of carbon dioxide can be defined as ' The closing of the stomata by a plant in response to excessive water loss through transpiration or in response to drought conditions. The stomatal closing reduces CO2 uptake as well as water loss, thus decreasing the photosynthetic rate. However, under conditions of elevated CO2 concentration, the CO2 gradient between the atmosphere and the leaf is higher than under ambient conditions, and CO2 can pass through partially closed stomates at a rate similar to that under conditions of lower CO2 and open stomates. The humidity gradient remains the same at higher CO2, and transpiration is impeded. The net result is improved water-use efficiency by some plants'. Previous 5 Terms: Water quality standards Water reservoir Water saturation Water service contract Water source heat pump Next 5 Terms: Water supplier Water Supply Outlook Water surface elevation (stage) water table Water transfers About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.