Plants both respond to and affect their atmospheric environment. Our laboratory is using integrated measurements obtained at the single leaf, single plant, and canopy scales to determine physiological and yield responses of plants to light, humidity and oxidant air pollutants. We are currently focusing on effects of ozone on carbon allocation and distribution of hydraulic conductance between above and below ground organs, on photosynthetic inhibition by ozone , on effects of canopy uptake of oxidants on regional pollutant concentrations, and on the impact of agricultural land uses on emissions and deposition of particulate matter smaller than 10 microns (PM-10). Experimental systems are drawn from San Joaquin Valley crop species, and from native vegetation of surrounding arid and semi-arid areas.
Grantz, D. A. and J. F. Farrar. 2000. Ozone inhibits phloem loading from a transport pool: compartmental efflux analysis in Pima cotton. Australian J. Plant Physiol. 27: 859-868.
Grantz, D. A. and S. Yang. 2000. Ozone impacts on allometry and root hydraulic conductance are not mediated by source limitation nor developmental age. J. of Experiment. Botany 51(346): 919-927.
Grantz, D. A. and J. F. Farrar. 1999. Acute exposure to ozone inhibits rapid carbon translocation from source leaves of Pima cotton. J. of Experiment. Botany 50 (336): 1253-1262.
Grantz, D. A., X. Zhang, and T. Carlson. 1999. Observations and model simulations link stomatal inhibition to impaired hydraulic conductance following ozone exposure in cotton. Plant, Cell and Environment 22: 1201-1210.
Grantz, D. A. and D. L. Vaughn. 1999. Vertical profiles of boundary layer conductance and wind speed in a cotton canopy measured with heated brass surrogate leaves. Agricultural and Forest Meteorology 97: 187-197.
Grantz, D. A., X. J. Zhang, W. J. Massman, G. den Hartog, H. H. Neumann, and J. R. Pederson. 1995. Effects of stomatal conductance and surface wetness on ozone deposition in field-grown grape. Atmospheric Environment-Urban. 29:3189-3198.
Massman, W. J. and D. A. Grantz. 1995. Estimating canopy conductance to ozone uptake from observations of evapotranspiration at the canopy scale and at the leaf scale. Global Change Biology. 1:183-198.
MacPherson, W. J. Massman, and J. Pederson. 1994. Aircraft measurements demonstrate ozone uptake by San Joaquin Valley crops. Calif. Agric. 48:9-12.
Gutierrez, M. V., F. C. Meinzer, and D. A. Grantz. 1994. Regulation of transpiration in coffee hedgerows: Covariation of environmental variables and apparent responses of stomata to wind and humidity. Plant Cell Environ. 17:1305-1313.