Abstract
1. Plasticity and genetic differentiation of growth, biomass allocation, and photosynthesis in response to temperature were investigated for populations of the introduced grass Pennisetum setaceum collected from different altitudes on the island of Hawaii. 2. The temperature optimum for photosynthesis was similar (35°C) for plants collected from different altitudes and grown in growth chambers with low (25/13°C) and high (33/25°C) temperature environments, indicating that P. setaceum has limited potential for photosynthetic temperature acclimation. Plants grown in the low-temperature environment, however, had 16% greater maximum photosynthetic rates on a leaf area basis than plants grown at the high temperature (25.4 and 21.4 μmol CO 2 m −2 s −1 , respectively)
Published Version
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