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Four Mediterranean herbaceous species, the two grasses Bromus madritensis (annual) and B. erectus (perennial), and the two legumes Medicago minima (annual) and M. glomerata (perennial) were grown in glasshouses at two levels of atmospheric CO 2 (350 and 700 μmol mol -1 ), under non-limiting nutrient conditions. After 6 months of growth, short and long-term responses of whole plant...