Summary
Plants collected from different habitats in the deserts of India, Saudi Arabia, Egypt, and Iraq were screened for their photosynthetic CO2-fixation pathways using δ13C and δD values. The analyses comprised 128 species belonging to 108 genera and 46 families. Neither the C4 nor the CAM pathway was prevalent in the plant families analyzed except in Poaceae, where C4 metabolism absolutely dominated. Of 93 dicotyledonous plants, only 10 exhibited a C4 pathway and only 2 were CAM plants. The study shows that some species reported by other workers as C4 plants are clearly C3 ones.
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Dedicated to Prof. Dr. Hermann Merxmüller on the occasion of his 60th birthday
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Ziegler, H., Batanouny, K.H., Sankhla, N. et al. The photosynthetic pathway types of some desert plants from India, Saudi Arabia, Egypt, and Iraq. Oecologia 48, 93–99 (1981). https://doi.org/10.1007/BF00346993
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DOI: https://doi.org/10.1007/BF00346993