Effect of Elevated Atmospheric CO(sup 2) and Temperature on Leaf Optical Properties and Chlorophyll Content in Acer saccharum (Marsh.)

摘要

The objective of this paper was to test the hypothesis that leaf reflectance, transmittance and absorptance in sugar maple (Acer saccharum Marsh.) would change significantly in response to a 30 Pa increase above ambient CO(sup 2) pressure and a 3 degrees C elevation in air temperature. Given the reported occurrences of decreased chlorophyll contents under elevated CO(sup 2) and the tendency of increased temperature to induce drought, we hypothesized that wavelength-dependent optical responses to these variables would be similar to those reported earlier for a variety of causes of plant stress.