Wind and transpiration

Grant R. Cramer cramer at MED.UNR.EDU
Mon Feb 22 18:10:56 EST 1999

On the contrary wind has strong effects on transpiration. It affects the 
boundary layer around a leaf (dead air space so to speak) and therefore
affects water diffusion from the surface of the leaf. One adaptation is to
have very long hairs on the leaf to increase this boundary area (in order to
reduce water loss).
Grant R. Cramer
Associate Professor
Department of Biochemistry
University of Nevada
Reno, NV 89557
phone: (775) 784-4204
fax: (775) 784-1650
email: cramer at
web page: http://BIOCHEM.MED.UNR.EDU/faculty/grant_c/

>From: dhaas at (Dave Haas)
>To: plant-ed at
>Subject: Wind and transpiration
>Date: Mon, Feb 22, 1999, 1:45 PM

> I had a question today that I'm not quite sure I know the answer.  In
> connection with an assignment on the effects of various factors on
> transpiration a student suggested that at high wind velocities leaves would
> loose water rapidly due to the effect of low pressure above the stoma
> caused by the Venturi effect.  I have a feeling that such factors would not
> be too significant due to the small size of stoma and the movement of the
> leaves in wind.  Has anyone any thoughts on this.
> D. Haas

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