The effect of phosphate solubilizing bacteria on Acer velutinum physiology (growth and nutrition).
2007
Teymouri, Maryam | Ali Ahmad Korori, Soudabeh | Khosh Nevis, Mostafa | Matini Zadeh, Mohammad
Soil microorganisms are important components of forest ecosystems, fulfilling critical roles in nutrient cycling, maintenance of soil structure and regulation of plant growth. The term plant growth promoting rhizobacteria (PGPR) is used to describe non-symbiotic soil bacteria which have potential to colonize plant root and stimulate growth. The aim of study was assessment the effects of Acer velutinum seeds inoculation with PSBs. Five isolated bacterial strains (including Pasturella, Acintobacillus r, Pseudomonas, Alcaligense and Enerobacter) were cultured separately in liquid Seperb medium at 25 ؛C. Bacterial cells were isolated by centrifuge and resuspended in phosphate buffer saline (pH= 7.2) to a density of 3*108 cfu per ml. Seeds of Acer velutinum were sowed in plastic pots and inoculated with bacterial suspension. Control seeds received sterile phosphate buffer saline. After seven months, seedlings were harvested. Shoot height, root length and their dry matter, available phosphorous in soil and seedlings were determined by standard methods. Results indicated the positive effect of PSBs on seedling emergence of Acer velutinum. Inoculated seedlings had more developed root system than those of controls. In conclusion, results indicated the stimulatory effect of PSBs on seedling emergence and their growth. According to results, it seemed inoculation of a mixed inoculum will be more effective in stimulating of growth.
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