Abstract
The unique symbiotic relationship of legume and Rhizobium, together with several aspects of plant metabolism, including changes in nodule number and dry weight, nodule protein and carbohydrate content and N2-ase activity, are known to be hampered by the introduction of metal ions like Hg, Cd and Ni. Nodule dry weight of Cicer arietinum L. was reduced with time in all the treatments. Biochemical parameters of nodules, including protein, free amino acid, total nitrogen and activity of enzymes, were reduced significantly by all the metals. Nodule protein and total nitrogen content increased at flowering time. Significant inhibition of NR activity and nitrogenase activity of nodule bacteroids were in the direction of Hg>Cd>Ni. All the metals induced adverse changes on the morphology of host plants. Yield components, like pods/plant, seeds/pod and harvest index, were also adversely affected by the metal ions tested. Negative results on productivity of the host plants were induced by the metals, in the direction of Hg>Cd>Ni.
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Pal, S.C. (1996). Effect of heavy metals on legume-Rhizobium symbiosis. In: Rahman, M., Podder, A.K., Van Hove, C., Begum, Z.N.T., Heulin, T., Hartmann, A. (eds) Biological Nitrogen Fixation Associated with Rice Production. Developments in Plant and Soil Sciences, vol 70. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8670-2_3
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DOI: https://doi.org/10.1007/978-94-015-8670-2_3
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