The present study describes the isolation of
some unique bacteria from soil and compost samples on a culture medium prepared
from the leaves of Parthenium hysterophorus (Carrot Grass). On the basis of
colony morphology, 12 morphotypes were selected that were found to exhibit
plant growth promoting activities by production of IAA and solubilizing
phosphate. Out of these, 3 bacterial isolates were found to significantly
stimulate the growth of Chickpea plant grown in a pot under normal
environmental conditions. The major growth parameters that were positively
influenced by bacterial treatment were plant height, root length, root width
and root dry weight. The 16S rRNA gene sequences of these three isolates shared
maximum homology with Methylorubrum rhodesianum with varying percentage of
similarity.
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