RE: Radial water transport

From: Peter Kitin <kitin@ffpri.affrc.go.jp>
Subject: RE: Radial water transport
Date: Mon, 07 Oct 2002 20:44:15 +0900

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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 . This is a resin cast of a fixed =
fresh sample of mature wood of Kalopanax pictus.=20

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


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<DIV><FONT face=3DArial size=3D2>Hello forum members,</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Some adds to the comments of Dr.=20
Donaldson,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>There are&nbsp;abundand intercellular =
spaces=20
in&nbsp;living rays, not only in&nbsp;dried wood, in the case of the =
hardwood=20
Kalopanax pictus. It should be similar in conifer wood as well. If water =
in a=20
living tree is transported through rays (don't know if there is evidence =
showing=20
this),&nbsp; I think the intercellular spaces should be more efficient=20
for&nbsp;the movement of water than diffusion through cell walls, even =
if=20
unlignified.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Here is an image showing intercellular =
spaces in=20
rays <A=20
href=3D"http://www.fagus.net/raycast1.jpg">http://www.fagus.net/raycast1.=
jpg</A> .=20
This&nbsp;is a resin cast of a fixed fresh sample of mature wood of =
Kalopanax=20
pictus. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>With kind&nbsp;regards</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV>Peter Kitin, Ph.D.</DIV>
<DIV>JSPS Fellow<BR>Laboratory of Wood Anatomy and Quality<BR>Forestry =
and=20
Forest Products Research Institute<BR>P.O. Box 16, Tsukuba Norin Kenkyu=20
Danchi-nai<BR>Tsukuba Science City, Ibaraki<BR>305-8687, Japan<BR>Tel. =
(work):=20
+81-(0)298-73-3211 ex.574=20
Fax.+81-(0)298-74-3720<BR></DIV></FONT></DIV></FONT></DIV></BODY></HTML>

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