Which one of the following is not a biofertil | vedclass

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Question

(A) : Biofertilizers are organisms that enrich the nutrient quality of the soil. The main sources of biofertilizers are bacteria,fungi,and cyanobacter

Vedclass · Accepted Answer

Agrobacterium

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(A) : Biofertilizers are organisms that enrich the nutrient quality of the soil. The main sources of biofertilizers are bacteria,fungi,and cyanobacteria. $Rhizobium$ bacteria are found in the root nodules of leguminous plants through a symbiotic association. These bacteria fix atmospheric nitrogen into organic forms,which are used by the plants as nutrients. Fungi are also known to form symbiotic associations with plants called mycorrhiza. Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments. Many of these can fix atmospheric nitrogen,$e.g.,$ $Anabaena$,$Nostoc$,$Oscillatoria$,etc. However,$Agrobacterium$ $tumefaciens$ is a pathogen of several dicot plants. It causes crown gall disease in plants,not acting as a biofertilizer.

Which one of the following is not a biofertiliser?

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