Abstract
The resistance to water-stress of plants which were pre-treated with five different fungicides was investigated in two experiments. In both experiments net photosynthetic CO2-uptake and total leaf water potential were monitored during a period of developing water stress. The second experiment also included measurements of leaf osmotic and turgor potential, relative leaf water content, and leaf surface area.
The plants pre-treated with Fenarimol maintained the highest photosynthetic activity in both experiments demonstrating the possibility to change the resistance to water stress by fungicide pre-treatment. An analysis of the leaf water relations showed that only in the case of Fenarimol the higher photosynthetic activity could be ascribed to a more favourable plant water status which was the result of a lower evaporating leaf area. Osomotic adjustment as a mechanism to maintain turgor at low leaf water potentials was not enhanced in any of the treatments.
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© 1983 Martinus Nijhoff/Dr W. Junk Publishers, The Hague
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Simon, P., Marcelle, R. (1983). Net Photosynthesis and Water Status of Apple Seedlings Under Developing Drought Conditions: Effects of Fungicide Pre-Treatment. In: Marcelle, R., Clijsters, H., van Poucke, M. (eds) Effects of Stress on Photosynthesis. Advances in Agricultural Biotechnology, vol 3. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-6813-4_12
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DOI: https://doi.org/10.1007/978-94-009-6813-4_12
Publisher Name: Springer, Dordrecht
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