Abstract
Net photosynthesis, stomatal conductance and water potential of leaves of three Hevea brasiliensis clones subjected to water stress, were measured with a portable gas exchange unit under tropical conditions in West-Malaysia. Both net photosynthesis and stomatal conductance showed a sigmoid shaped, declining curve as a function of increasing water stress situations. Although net photosynthesis reached zero after 9 days of drought stress (at leaf water potentials of around 1.3 MPa), almost complete recovery was observed one day after rewatering. It was concluded from slower photosynthetic decrease, higher stomatal conductances at the end of the drying cycle and higher net photosynthesis after rewatering, that rubber clone FX 25 possessed a better water stress resistance than clones PR 107 and RRIM 701. The in teresting potentialities of a mobile gas exchange unit for studying plant resistance to water stress are also discussed.
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© 1983 Martinus Nijhoff/Dr W. Junk Publishers, The Hague
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Ceulemans, R., Impens, I., Ng, A.P. (1983). Photosynthesis, Stomatal Conductance and Leaf Water Potential during Water Stress Situations in Young Rubbertrees (Hevea brasiliensis) Under Tropical Conditions. 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_10
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DOI: https://doi.org/10.1007/978-94-009-6813-4_10
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