Commercialization of PGPRs

Rhizosphere and the Phyllosphere
Rhizosphere Introduction
Rhizospher Effect
Nitrogen Fixation in the Rhizosphere
Alteration of Rhizosphere Microflora
Associative and Antagonistic Activities in the Rhizosphere
Root Exudates
Organic Compounds Detected in Plant Root Exudates
Fungistasis
Techniques of Rhizosphere
The Soil Dilution and Plate Count Method
The Soil Plate
The Soil Box
The Contact Slide Technique
Artificial Rhizosphere
Model System

Commercialization of PGPRs

Commercialization of PGPRs

A product by name QUANTUM 4000 is being marketed by Gustafson Inc. Dallas, Texas as a growth promoter on peanut (groundnut) and cotton. The product contains Bacillus subtilis strain GBO3, which is a derivative of strain A13. Other products may follow once procedures are standardized for mass multiplication together with strategies for carriers and quality control.

Prior to this, the repeatability of success under field conditions have to be established with regard to fluorescent pseudomonads; quite often, strains that succeed under green house conditions fail to do so in the field. The use of multiple strains of fluorescent pseudomonads has shown success in the control of diseases such as take-all of wheat and Fusarium wilt of radish.

In northwest China, encouraging results in the control of take-all disease of wheat have come from field trials covering 4000 ha during 1991-94 by using P. fluorescens CN12 and Tn5 derivatives, in diverse sites exhibiting varying environmental conditions; the yield increases of wheat due to rhizobacterial inoculation varied from 16 to 64 per cent

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