Stomatal limitation of photosynthesis as affected by water stress and CO2 concentration
Tóm tắt
A water stress effect on photosynthesis and transpiration of wheat seedlings at 50-500 µmol(CO2) mol-1 was measured in an open gas exchange system. The limitation of photosynthesis by stomatal conductance was quantified by a stomatal control coefficient of the net photosynthetic rate. The stomatal control coefficient increased linearly as the water potential of root media decreased to -1 MPa, and it decreased with increasing CO2 concentration.
Tài liệu tham khảo
Brooks, A., Farquhar, G.D.: Effect of temperature on the CO2/O2 specificity of ribulose-1,5-bisphosphate carboxylase/oxygenase and the rate of respiration in the light. Estimates from gas-exchange measurements on spinach.-Planta 165: 397–406, 1985.
Farquhar, G.D., Caemmerer, S. von, Berry, J.A.: A biochemical model of photosynthetic CO2 assimilation in leaves of C3 species.-Planta 149: 78–90, 1980.
Farquhar, G.D., Sharkey, T.D.: Stomatal conductance and photosynthesis.-Annu. Rev. Plant Physiol. 33: 317–345, 1982.
Giersch, C., Lämmel, D., Farquhar, G.: Control analysis of photosynthetic CO2 fixation.-Photosynth. Res. 24: 151–165, 1990.
Jones, H.G.: Partitioning stomatal and non-stomatal limitations to photosynthesis-Plant Cell Environ. 8: 95–104, 1985.
Jones, H.G., Massacci, A., Corlett, J., Masojidek, J., Hall, D.: Use of combined fluorescence and gas-exchange measurements to assess processes limiting photosynthesis under stress.-Bull. Soc. Bot. France, Actual. bot. 137: 67–72, 1990.
Sage, R.F.: A model describing the regulation of ribulose-1,5-bisphosphate carboxylase, electron transport, and triose phosphate use in response to light intensity and CO2 in C3 plants.-Plant Physiol. 94: 1728–1734, 1990.
Woodrow, I.E., Ball, J.T., Berry, J.A.: Control of photosynthetic carbon dioxide fixation by the boundary layer, stomata and ribulose 1,5-biphosphate carboxylase/oxygenase.-Plant Cell Environ. 13: 339–347, 1990.