He demonstrated the link between forests and the atmosphere using novel techniques for measuring leaf water potential and stomatal conductance.
2.
The heritability of stomatal conductance is reasonably high, with reported values typically in the range of 0.5 to 0.8.
3.
This instrument can give a relative measure of stomatal conductance in a few seconds, making it possible to identify physiologically superior genotypes from within bulks.
4.
Stomatal conductance in white spruce seedlings declined generally from more sheltered to more exposed environments, correlating best with increased vapor pressure deficit ( VPD ).
5.
Since photosynthesis, transpiration and stomatal conductance are an integral part of basic plant physiology, estimates of these parameters can be used to investigate numerous aspects of plant biology.
6.
This closing can be trigged by the roots sensing dry soil and in response producing the hormone ABA which when transported up the xylem into the leaves will reduce stomatal conductance and wall extensibility of growing cells.
7.
These systems may calculate water use efficiency ( A / E ), stomatal conductance ( gs ), intrinsic water use efficiency ( A / gs ), and sub-stomatal concentration ( Ci ).
8.
The most direct method for measuring atmospheric carbon dioxide concentrations for periods before instrumental sampling is to measure bubbles of air ( fertilization effect raising plant biomass growth and reducing stomatal conductance requirements for intake, consequently reducing transpiration water losses and increasing water usage efficiency.
9.
In outplanted trees, maximum stomatal conductances ( g ) were initially low ( < 0.01 cm / s ), and initial base xylem pressure potentials ( PSIb ) were-2.0 MPa . During the growing season, g increased to about 0.20 cm / s and PSIb to-1.0 MPa . Minimum xylem pressure potential ( PSIm ) was initially-2.5 MPa, increasing to-2.0 MPa on day 40, and about-1.6 MPa by day 110.
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