Abstract
In Australia, diurnal courses of leaf conductance and transpiration of mistletoes and their hosts were measured using steady-state porometers under conditions of partial drought and high evaporative demand. The measurements confirm and enlarge previous observations that mistletoes transpire at higher rates than their hosts and that their daily average leaf conductances were higher too. Also in the parasite, leaf conductance showed large and consistent changes during the course of the day, indicating definite stomatal regulation.
In general, the δ13C values (PDB standard) of the organic substance was more negative in the leaves of the mistletoe compared with the value in the host leaves. This indicates a higher average daytime intercellular concentration of CO2 in the leaves of the parasite. This is in accordance with the results of leaf conductance measurements.
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© 1986 Martinus Nijhoff Publishers, Dordrecht
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Ziegler, H. (1986). Control of Photosynthesis by Variation of Diffusion Resistance in Mistletoes and their Hosts. In: Marcelle, R., Clijsters, H., van Poucke, M. (eds) Biological Control of Photosynthesis. Advances in Agricultural Biotechnology, vol 19. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4384-1_16
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DOI: https://doi.org/10.1007/978-94-009-4384-1_16
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