Relationship between growth rate and net photosynthesis of Azolla in ambient and elevated CO2 concentrations |
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| Institution: | 1. USDA-ARS, US Salinity Lab, Riverside, CA 92507, USA;2. Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA;3. Department of Agronomy, Iowa State University, Ames, IA 50011-1010, USA;4. Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab, India;5. Natural Resources Research Institute, University of Minnesota, Duluth, MN, 55811, USA;1. Fundación Instituto Leloir, IIBBA-CONICET, Av. Patricias Argentinas 435, C1405BWE Buenos Aires, Argentina;2. Plataforma Argentina de Biología Estructural y Metabolómica PLABEM, Av. Patricias Argentinas 435, C1405BWE Buenos Aires, Argentina;1. Institute for Nuclear Theory and Department of Physics, Box 351560, University of Washington, Seattle, WA 98915, USA;2. Departamento de Física Teórica, Módulo 15, Universidad Aut Madrid, E-28049 Madrid, Spain |
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| Abstract: | Azolla pinnata was grown out-of-doors at Phoenix, AZ, U.S.A. in open-topped plastic-walled chambers supplied with either 340 or 640 μl CO2l−1 air. Net photosynthesis and growth rate were measured weekly between September 1985 and May 1986 and a significant (P < 0.01) positive correlation was established between these two parameters in both CO2 environments. Regression coefficients for the linear regression of growth rate onto net photosynthesis were not significantly different in the two CO2 environments, indicating that the rate of growth per unit of CO2 uptake is not influenced by an atmospheric CO2 concentration - environment interaction. |
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