Abstract
Two plant growth-promoting bacteria, Bacillus subtilis and Pseudomonas corrugata, immobilized in a sodium alginate based formulation were evaluated for their survival, viability and plant growth-promoting ability after 3 years of storage at 4 degrees C. Populations of both of the bacterial isolates recovered from the immobilized sodium alginate beads were in the order of 10(8) cfu g(-1). The plant-based bioassay indicated that the plant growth promotion ability of both of the bacterial isolates was equal to those of fresh broth-based formulations. The bacterial isolates retained the root colonization, and antifungal and enzyme activities in the alginate-based formulation during storage.
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