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Xylem-Tapping Mistletoes: Water or Nutrient Parasites?
J. R. Ehleringer, E.-D. Schulze, H. Ziegler, O. L. Lange, G. D. Farquhar and I. R. Cowar
New Series, Vol. 227, No. 4693 (Mar. 22, 1985), pp. 1479-1481
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1694970
Page Count: 3
You can always find the topics here!Topics: Parasite hosts, Nitrogen, Carbon isotopes, Water use efficiency, Parasites, Transpiration, Nutrients, Plants, Leaf conductance, Water consumption
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Most mistletoes parasitize higher plants by tapping the xylem (a conduction tissue) of their hosts. Field observations of diurnal gas exchange parameters and carbon isotope ratios in xylem-tapping mistletoes from three continents support the hypotheses that water use efficiency and carbon isotope composition are related and that mistletoes which are parasitic for water are also nutrient parasites, differing in their water use efficiency relative to that of their hosts on the basis of host nitrogen supply in the transpiration stream.
Science © 1985 American Association for the Advancement of Science