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1999•Microbes and EnvironmentsOpen access

Effect of 2,4-D on NR, NiR and Leghaemoglobin Synthesis in Root Nodules Formed by Bradyrhizobium japonicum in Glycine max.

Meenu Saraf, Naveen Kumar Arora, Vineet Kumar, Dinesh Kumar Maheshwari

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Abstract

The present study revealed that although very low concentrations (<5ug/ml) of 2,4-Dichlorophenoxyacetic acid (2,4-D), a common herbicide, stimulated nitrate reductase (NR), nitrite reductase (NiR) and leghaemoglobin, in root nodules of Glycine max, higher cocentrations (>5ug/ml) were inhibitory.The results have also shown that treatment of rhizobia with different concentrations of 2,4-D also affected NR and NiR of cytosol fraction of root nodules.This shows that there is a relationship between plant NR, NiR and the bacteroids in the root nodules.

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The present study revealed that although very low concentrations (<5ug/ml) of 2,4-Dichlorophenoxyacetic acid (2,4-D), a common herbicide, stimulated nitrate reductase (NR), nitrite reductase (NiR) and leghaemoglobin, in root nodules of Glycine max, higher cocentrations (>5ug/ml) were inhibitory.The results have also shown that treatment of rhizobia with different concentrations of 2,4-D also affected NR and NiR of cytosol fraction of root nodules.This shows that there is a relationship between plant NR, NiR and the bacteroids in the root nodules.

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Available abstract

The present study revealed that although very low concentrations (<5ug/ml) of 2,4-Dichlorophenoxyacetic acid (2,4-D), a common herbicide, stimulated nitrate reductase (NR), nitrite reductase (NiR) and leghaemoglobin, in root nodules of Glycine max, higher cocentrations (>5ug/ml) were inhibitory.The results have also shown that treatment of rhizobia with different concentrations of 2,4-D also affected NR and NiR of cytosol fraction of root nodules.This shows that there is a relationship between plant NR, NiR and the bacteroids in the root nodules.

Key concepts: Leghemoglobin, Rhizobia, Bradyrhizobium japonicum, Glycine, Root nodule, Nitrate reductase, Nitrogenase, Chemistry

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Effect of 2,4-D on NR, NiR and Leghaemoglobin Synthesis in Root Nodules Formed by Bradyrhizobium japonicum in Glycine max. — Research Paper | ScholarLens