alexa In vitro studies on the effects of herbicides on the growth of rhizobia.
Environmental Sciences

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Singh G, Wright D

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Abstract AIMS: To study the possible adverse effect of herbicides on nodulation and nitrogen fixation in legumes by affecting the nitrogen-fixing rhizobia. METHODS AND RESULTS: Experiments were conducted to study the effect of four herbicides (terbutryn/terbuthylazine, trietazine/simazine, prometryn and bentazone) on the growth of nitrogen-fixing pea rhizobia (Rhizobium leguminosarum) in vitro by measuring optical density. Terbutryn/terbuthylazine, trietazine/simazine and prometryn had an adverse effect on the growth of rhizobia whereas bentazone was safe to rhizobia. CONCLUSIONS: The above herbicides could be used in pea at the recommended rates. SIGNIFICANCE AND IMPACT OF THE STUDY: The adverse effects of herbicides on rhizobia were observed at concentrations not normally expected to occur under field conditions. Further, previously observed adverse effects of these herbicides on nodulation and nitrogen fixation of peas were, possibly, not due to their effects in rhizobia but to their adverse effects on the plant growth itself.
This article was published in Lett Appl Microbiol and referenced in Journal of Bioremediation & Biodegradation

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