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Figure 1. Relationships between shoot water potential and: (a) netphotosynthesis (An, µmol m−2 s−1); (b) mesophyll conductance (gm,mmol m−2 s−1); (c) stomatal conductance to CO2 (gs,CO2 , mmol m−2s−1); and (d) the ratio of intercellular to ambient CO2 conc
Table 2).Field resultsField measurements of Ψ were all at or above
Figure 4. Relationships between shoot water potential and: (a) Ameasurements on n; (b)gm; (c) gs,CO2; and (d) Ci/Ca of black spruce
Figure 6. Relationship between vapor pressure difference and stomatalconductance to Hments of gas exchange on spruce
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