Re: [IAWA Forum] RE: Radial water transport

From: "P. Baas" <Baas@nhn.leidenuniv.nl>
Subject: Re: [IAWA Forum] RE: Radial water transport
Date: Mon, 07 Oct 2002 15:32:01 +0200

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But what about the functionality of intercellular spaces in gas exchange? 
Is there not good evidence that morphogenetic triggers like ethylene move 
in gaseous state through the intercellular spaces of sapwood xylem rays? I 
forget the reference, but I think the IAWA J once published a paper on this 
(by Aloni or Yamamoto?).
Pieter Baas


   At 08:44 PM 10/7/02 +0900, Peter Kitin wrote:
>Hello forum members,
>
>Some adds to the comments of Dr. Donaldson,
>There are abundand intercellular spaces in living rays, not only in dried 
>wood, in the case of the hardwood Kalopanax pictus. It should be similar 
>in conifer wood as well. If water in a living tree is transported through 
>rays (don't know if there is evidence showing this),  I think the 
>intercellular spaces should be more efficient for the movement of water 
>than diffusion through cell walls, even if unlignified.
>
>Here is an image showing intercellular spaces in rays 
><http://www.fagus.net/raycast1.jpg>http://www.fagus.net/raycast1.jpg . 
>This is a resin cast of a fixed fresh sample of mature wood of Kalopanax 
>pictus.
>
>With kind regards
>
>Peter Kitin, Ph.D.
>JSPS Fellow
>Laboratory of Wood Anatomy and Quality
>Forestry and Forest Products Research Institute
>P.O. Box 16, Tsukuba Norin Kenkyu Danchi-nai
>Tsukuba Science City, Ibaraki
>305-8687, Japan
>Tel. (work): +81-(0)298-73-3211 ex.574 Fax.+81-(0)298-74-3720

P. Baas
Director
Nationaal Herbarium Nederland
Universiteit Leiden branch
P.O. Box  9514,  2300 RA Leiden
The Netherlands
Phone: + 31 71 527 3515
Fax:  + 31 71 527 3522
new e-mail address: baas@nhn.leidenuniv.nl
http://www.nationaalherbarium.nl/

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