Ability of <Emphasis Type="Italic">Emericella rugulosa</Emphasis> to mobilize unavailable P compounds during Pearl millet [<Emphasis Type="Italic">Pennisetum glaucum</Emphasis> (L.) R. Br.] crop under arid condition |
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Authors: | B K Yadav J C Tarafdar |
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Institution: | (1) Central Arid Zone Research Institute, Jodhpur, 342 003, India |
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Abstract: | Phosphate solubilizing microorganisms are ubiquitous in soils and could play an important role in supplying P to plants where
plant unavailable P content in soil was more. A phosphatase and phytase producing fungus Emericella rugulosa was isolated and tested under field condition (Pearl millet as a test crop) in a loamy sand soil. In the experimental soil
68% organic phosphorous was present as phytin; less than 1% of phosphorous was present in a plant available form. The maximum
effect of inoculation on different enzyme activities (acid phosphatase, alkaline phosphatase, phytase, and dehydrogenase)
was observed between 5 and 8 weeks of plant age. The depletion of organic P was much higher than mineral and phytin P. The
microbial contribution was significantly higher than the plant contribution to the hydrolysis of the different P fractions.
A significant improvement in plant biomass, root length, seed and straw yield and P concentration of root and shoot resulted
from inoculation. The results suggest that Emericella rugulosa produces phosphatases and phytase, which mobilize P and enhance the production of pearl millet. |
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Keywords: | Emericella rugulosa pearl millet acid and alkaline phosphatase phytase P mobilization |
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