Effect of Pseudomonas putida on Yield and Phosphorus Uptake of Three Forage Sorghum Cultivars
2014
Ehteshami, S. M. R. | Abbasi, M. R. | Khavazi, K.
To investigate the effect of Pseudomonas putida bacteria application on quantitative and qualitative characteristics of three forage sorghum cultivars, an experiment was carried out at the Agricultural and Natural Resource Research Center of Tehran Province (Varamin) during 2009-2010. The experiment comprised of a factorial arrangement of treatments based on a complete randomized block design with three replications. The treatments consisted of different bacterial strains and sorghum cultivars. The bacterial strain factor was 1) no seed inoculation (control), 2) seed inoculation with Pseudomonas putida strain 168, 3) seed inoculation with Pseudomonas putida strain 41 and 4) seed co-inoculation with both bacterial strains. The investigated sorghum cultivars were 1) Speedfeed, 2) Jumbo and 3) KFS1. The measured traits were plant height, number of tillers, stem diameter , leaf number , , plant tissue P content, soil available P and the dry and fresh weights of stem, leaf, and forage yield. Seed inoculation with Pseudomonas putida strain 168 achieved the highest level in most of the measured characteristics. However, seed co-inoculation with the two bacterial strains had the lowest performance for the most traits. The findings of this research showed that integrated bacteria application created an antagonistic effect. However, seed inoculation with Pseudomonas putida strain 168 enhanced nutrient uptake (especially P) and consequently promoted plant growth. It seems that stimulation of the secondary metabolites production would lead to better forage yield in sorghum.
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