Leaf Water Potential, Osmotic Potential, and Solute Accumulation of Several Hardwood Species as Affected by Manipulation of Throughfall Precipitation in an Upland Quercus Forest
Plant growth is more often limited by water stress in the temperate region than by any other environmental variable (Kramer 1983). The response of forests to increased occurrence of drought, associated with increased atmospheric concentrations of CO2 and other greenhouse gases, has emerged as a key issue in the global climate change scenarios (Wigley et al. 1984). The forests of the southeastern United States have been identified as potentially sensitive to climate change because present rainfall levels are barely sufficient to meet current potential evaporation and transpiration demands of vegetation (Nielson et al. 1989). An increase in the frequency and severity of drought associated with the greenhouse effect (Rind et al. 1990) has the potential to greatly alter the distribution and productivity of tree species (Pastor and Post 1988), with an increase in the proportion of the growing season during which soil moisture is below wilting point inevitably increasing (Pastor and Post 1988). Drought tolerance of the individual species will dictate how ecosystems respond to such climate-change scenarios.
KeywordsSucrose Carbohydrate Dehydration Photosynthesis Fructose
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- Abrams MD (1988) Sources of variation in osmotic potentials with special reference to North American tree species. For Sci 34:1030–1046.Google Scholar
- Abrams MD, Knapp AK (1986) Seasonal water relations of three gallery forest hardwood species in northeast Kansas. For Sci 32:687–696.Google Scholar
- Bahari ZA, Pallardy SG, Parker WC (1985) Photosynthesis, water relations, and drought adaptation in six woody species of oak-hickory forests in central Missouri. For Sci 31:557–569.Google Scholar
- Hinckley TM, Teskey RO, Duhme F, Richter H (1981) Temperate hardwood forests. In Kozlowski TT (ed) Water deficits and plant growth. Academic Press, New York, pp 153–208.Google Scholar
- Kramer PJ (1980) Drought stress, and the origin of adaptations. In Turner NC, Kramer PJ (Eds). Adaptation of plants to water and high temperature stress. Wiley, New York, pp 7–22.Google Scholar
- Kramer PJ (1983) Water relations of plants. Academic Press, New York.Google Scholar
- Kochenderfer J, Lee R (1973) Indexes to transpiration by forest trees. Oecol Plant 8:175–184.Google Scholar
- Nielson RP, King GA, DeVelice RL, Lenihan J, Marks D, Dolph J, Campbell B, Glick G (1989) Sensitivity of ecological landscapes and regions to global climate change. US Environmental Protection Agency, Environmental Research Laboratory, Corvallis, Oregon.Google Scholar
- Nobel PS (1991) Physicochemical and environmental plant physiology. Academic Press, San Diego, California.Google Scholar
- Roberts SW, Strain BR, Knoerr KR (1980) Seasonal patterns of leaf water relations in four co-occurring forest tree species: parameters from pressure-volume curves. Oecologia 46:330–337.Google Scholar