Photosynthetica 1998, 35(2):205-212 | DOI: 10.1023/A:1006954605631

Changes in Photosynthesis in Inbred Maize Lines with Different Degrees of Chilling Tolerance Grown at Optimum and Suboptimum Temperatures

T. Janda1, G. Szalai1, J.-M. Ducruet2, E. Páldi1
1 Agricultural Research Institute of the Hungarian Academy of Sciences, Martonvásár, Hungary
2 Section de Bioénergétique, DBCM, INRA/CEA Saclay, Gif-sur-Yvette Cedex, France

The effects of growth temperature on changes in net photosynthetic rate (PN) and the chlorophyll fluorescence induction parameter Fv/Fm were investigated after cold stress in inbred maize lines with different degrees of cold tolerance. There was no significant difference between lines grown at optimum temperatures of 25/23 and 20/18 °C as regards PN and Fv/Fm determined at the growth temperature, but these parameters were lower for plants grown at a suboptimum temperature of 15/13 °C. After cold treatment, the decrease in PN was more pronounced in chilling-sensitive lines. The higher the growth temperature was, the more pronounced decrease occurred in PN and Fv/Fm. Thus at low growth temperature both damaging and adaptive processes occur.

Additional key words: chlorophyll fluorescence; gas exchange; intercellular CO2 concentration; low temperature stress; stomatal conductance; Zea mays

Prepublished online: June 1, 1998; Published: January 1, 1998  Show citation

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Janda, T., Szalai, G., Ducruet, J.-M., & Páldi, E. (1998). Changes in Photosynthesis in Inbred Maize Lines with Different Degrees of Chilling Tolerance Grown at Optimum and Suboptimum Temperatures. Photosynthetica35(2), 205-212. doi: 10.1023/A:1006954605631
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