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
