Abstract
Determination of phenolphthalein diphosphate splitting bacteria: (phosphatase producers) in soils and rhizosphere of both wheat and broad bean at different stages of growth was studied. It was found that the ability to hydrolyze phenolphthalein diphosphate: (phosphatase production) possess many organisms isolated from all samples examined in different stages of growth in soil and rhizosphere of both wheat and broad bean. The rhizosphere effect on this group was positive and high, especially at seedling, seed formation, and maturity stages. The densities of phosphatase producers were considerably higher in the rhizosphere of broad bean at later stages of growth than in the rhizosphere of wheat. These high densities of phosphatase producers may play a part in supplying plants with available phosphorus.
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