Lec10TranspirationAndWaterStress

Transpiration is losing water from the leafes and

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: • 0.03ml/cm2/hr – If tree has 100m2 of leaf area = 190 gal/day Transpiration a big tree would use about 200 gallon of water a day. transpiration is losing water from the leafes and evaporation is losing water from something else for example soil. Transpiration • Driving force – Evaporation Transpiration Transpiration • Protective mechanisms – – – – – Thickened cuticle Bark Tomentose (hairy) leaves Thick leaves Small leaves http://www.sbs.utexas.edu/mauseth/ http://www.cambridge2000.com/ http://www.sbs.utexas.edu/bio406d/ http://www.botgard.ucla.edu/html/botany Transpiration http://toptropicals.com/pics/ Environmental Factors Affecting the Rate of Transpiration • • • • • Light Temperature Relative humidity Wind Soil water Transpiration Environmental Factors that Affect the Rate of Transpiration • Light – Plants transpire more rapidly in the light than in the dark • Light stimulates the opening of the stomata. • Light also speeds up transpiration by warming the leaf. – Intensity light is important for trasnpiration and it opens the stomata and as well as cool the leafe Transpiration Environmental Factors that Affect the Rate of Transpiratio...
View Full Document

This document was uploaded on 01/17/2014.

Ask a homework question - tutors are online