Plant and Soil

, Volume 148, Issue 1, pp 21–27 | Cite as

Effects of short-term salinity on leaf gas exchange of the fig (Ficus carica L.)

  • S. D. Golombek
  • P. Lüdders
Research Article

Abstract

The influence of short-term salinity (day 1–day 2: 50 mol m−3 NaCl, day 3–day 7: 100 mol m−3 NaCl in the nutrient solution) on leaf gas exchange characteristics were studied in two fig clones (Ficus carica L.), whose root mass had been varied in relation to the leaf area. The stomatal conductance was diminished by NaCl in the first week of treatment. NaCl slightly reduced the calculated intercellular partial pressure of CO2. The net photosynthetic rate of plants with many roots was stimulated by NaCl on some days of the first week of treatment, whereas the net assimilation rate of the plants with few roots remained unaltered or decreased by NaCl. Only the assimilation of the salt-treated plants of one clone for some days during the first week of treatment seemed to be influenced by stomatal conductance. Nonstomatal factors were primarily responsible for the changes in CO2 uptake in response to salt and/or root treatment. The water use efficiency increased during several days of the first week of NaCl treatment. Decreased stomatal conductance, increased water use efficiency and stimualtion of the net CO2 assimilation rate appear to enhance salt tolerance during the first few days of salinity. ei]H Lambers

Key words

Ficus carica L. nonstomatal conductance to CO2 photosynthesis short-term salinity stomatal conductance to CO2 water use efficiency 

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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • S. D. Golombek
    • 1
  • P. Lüdders
    • 1
  1. 1.Institute of Crop ScienceTechnical University of BerlinBerlin 33Germany

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