Seth,
You might try looking for an old LI-1600 porometer. Li-Cor doesn't
make them any more, but they work reasonably well for conifer
needles; I use one with eastern redcedar (sorry, I can't part with
mine!). It helps if you can get the right kind of cuvette fitting,
but even the standard one is OK. You do need to sample the needles
you use and measure their area, in order to correct for them not
completely filling the curvette opening, but that is par for the
course with conifer needles.
Commercial system for conifer stomatal conductance?
Can anyone recommend a system for measuring stomatal conductance on
conifer needles? I have corresponded with makers of the Delta-T AP4, and
the Decagon porometer system. Both tell me there's no way to achieve a
seal with small conifer needles across the aperture, so results are
sketchy. One suggested buying a photosynthesis system with conifer chamber
(e.g., LI-6400), but this seems excessive for my limited needs.
Dr. Seth W. Bigelow
Biologist, USDA-FS Pacific Southwest Research Station
1731 Research Park Drive, Davis California
--
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Richard L. Boyce
Department of Biological Sciences
Northern Kentucky University
Nunn Drive
Highland Heights, KY 41099 USA
859-572-1407 (tel.)
859-572-5639 (fax)
[email protected]
http://www.nku.edu/~boycer/
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"One of the advantages of being disorderly is that one is constantly
making exciting discoveries." - A.A. Milne
