Photosynthetica 1997, 33(13):473-476 | DOI: 10.1023/A:1006880521888

Stomatal limitation of photosynthesis as affected by water stress and CO2 concentration

J. Janáček1
1 Research Institute for Plant Production, Prague 6-Ruzyně, Czech Republic

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.

Additional key words: irradiance; photon fluence density; stomatal conductance; transpiration; water potential

Prepublished online: January 1, 1998; Published: September 1, 1997  Show citation

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Janáček, J. (1997). Stomatal limitation of photosynthesis as affected by water stress and CO2 concentration. Photosynthetica, 34(3), 473-476. doi: 10.1023/A:1006880521888
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