Epidermis of xerophytes

Adrian Bell a.d.bell at bangor.ac.uk
Thu Oct 26 10:08:43 EST 1995




On 25 Oct 1995 19:01:12 -0700 Jon Monroe wrote:

> From: Jon Monroe <MONROEJD at VAX1.ACS.JMU.EDU>
> Date: 25 Oct 1995 19:01:12 -0700
> Subject: Epidermis of xerophytes
> To: plant-ed at net.bio.net
> 
> Plant-eders:
> 
> In a recent botany lab on leaves our students looked at a prepared slide of
> cross sections of mesophyte, hydrophyte and xerophyte leaves.  Most of the
> adaptations make sense to me except for the multiple layers of epidermal cells
> in the xerophyte.  We thought about the types of stresses these plants might be
> under, including high UV light, and came up with the hypothesis that perhaps
> these extra epidermal cells provide for more UV absorbing potential since
> epidermal cell vacuoles do accumulate phenolic compounds that seem to serve
> such a function.  Does anyone know if this has been examined?  Do you know of
> other potential functions?  Raven, Evert and Curtis (3rd edition, p.461) show
> them in Oleander but don't mention them in the text.
> 
> Thanks!  Jon
> 
> -----------------------------------------------------------------
>   Jonathan Monroe	 	 voice:  540-568-6649 (office)
>   Department of Biology                  540-568-6045 (lab)
>   James Madison University       fax:    540-568-3333
>   Harrisonburg, VA 22807-0001	 e-mail: monroejd at jmu.edu
>     www: www.jmu.edu/biology/biofac/jmonroe/jmonroe.html
> -----------------------------------------------------------------


  Water storage?  Try p81 in Plant Structure:function and development  Romberger et al 1993

   ( or  p114 in Physiological plant anatomy  Haberlandt  1884 / 1914 !!!)

                               Adrian Bell     Bangor  U.K.





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