Wheat response to acc-deaminase Fluorescent pseudomonads with varying phosphate solubilizing activity on a phosphorus deficient soil.

Rhizobacterial phosphate solubilization supports plant nutrition under phosphorus (P) deficiency stress. In this filed study we evaluated wheat response to ACC-deaminase-containing rhizobacterial strains, with or without phosphatesolubilizing activity, under varying levels of soil applied phosphatic fertilizer. The experiment was conducted on a Pdeficient soilby using randomized complete block split plot design involving two factors. Factor Ainvolved three P doses (in main plots), i.e. 0(Control), 42.5 and 85 kg P2O5g ha -1 . Factor B included three rhizobacterial treatments (in sub plots), i.e. No rhizobacterial seed inoculation ( control) and wheat seed inoculation with ACC-deaminase Pseudomonas fluorescens with or without P-solubilizing activit y. P nutrition of wheat plants at half and full recommended dose increased various plant growth and yield parameters of wheat in a range of 7.4 to128% and 9.6 to 144%, respectively, against control. ACC-deaminase Pseudomonas fluorescens without or with P-solubilizing activity increased various traits of wheat plants in a range of 1.4 to38% and 2.9 to86%, respectively, against control. The study concluded that Pseudomonas fluorescenswith dual activities of ACC-demainase and phosphate solubilization play significant role in enhancing wheat growth and yield under both low- and high-P sustainable agriculture.