Effect of Temperature on the Growth Rates of Rhizobia

Abstract

The optimum temp. for the growth of Rhizobium trifolii, R. phaseoli, R. leguminosarum, and Rhizobium sp. from Dalea was between 29[degree] and 31[degree]C, and no growth occurred at 39[degree]C. The optimum temp. for R. meliloti was about 35[degree] and no growth was observed at 41[degree]. 28[degree]C is recommended where studies are made with several spp. The temp. characteristic, [mu], over the 15[degree] to 25[degree]C range was approx. 16,900 calories.