A Portable Apparatus for Estimating Stomatal Aperture in ConifersPacific Northwest Forest and Range Experiment Station, U.S. Department of Agriculture, Forest Service, 1969 - 7 pagina's |
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A Portable Apparatus for Estimating Stomatal Aperture in Conifers William Lopushinsky Volledige weergave - 1969 |
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48-percent and 67-percent 57-percent alcohol solution 95-percent concentration 95-percent ethanol Alaska alcohol concentration aperture in conifer average infiltration pressure calculated stomatal conifer needles considered fully open current-year needles Douglas-fir needles dyne per centimeter end point estimating stomatal aperture estimating stomatal opening ethanol-water mixture exploded view Froeschel Fry and Walker fully open stomata hour of drying infiltration often occurs Infiltration pressure increased INFILTRATION PRESSURE P.S.I. infiltration values large number lecture bottle measure of stomatal mechanisms of stomatal midrange of closure needle and later needle chamber needle holder NEEDLE VALVE O-ring ON/OFF VALVE NEEDLE opening in conifers Oregon p. s. i. or less partially closed stomata Plexiglas point more difficult polyethylene washer ponderosa pine needles portions of needles Portland pressure-infiltration method QUICK CONNECT range of infiltration RELEASE VALVE sample of needles shoot stomata in older stomata in younger stomatal movement stomatal widths surface tension Swauk transpiration rate Walker described weighed wider degree