Effect of inoculation on the exudation of amino acids and sugars by berseem (Trifolium alexandrinum) and lucerne (Medicago sativa)

Summary Root exudates of inoculated and uninoculated berseem (Trifolium alexandrinum) and lucerne (Medicago sativa) were examined chromatographically for their amino acid and reducing-sugar contents after 6 and 9 weeks growth in a sand culture experiment.Aspartic acid was the only amino acid detected in the root exudates of both the inoculated and uninoculated legumes, up to 9 weeks growth.Root exudates of inoculated berseem contained more amino acids than those of lucerne. Glutamic acid and fructose are characterised by their consistent presence in the root exudates of inoculated plants and their absence in those of uninoculated ones.The data presented in this paper is taken from the thesis submitted by the senior author to the P.G. School, IARI, New Delhi in 1964 for M. Sc. degree in Microbiology.