Mineral composition of field grown winter wheat inoculated with phosphorus solubilizing bacteria at different plant growth stages

Abstract

A two year field experiment was conducted in field conditions using wheat (Triticum aestivum ssp. Vulgare L. cv Bezostaja) as the test plant for the evaluation of phosphate solubilizing (+PS) microorganisms. Bacterial strains significantly (P<0.05) increased plant biomass (by 13 to 36 %) without plant P enrichment. Only Bacillus sp. #189 significantly (P<0.05) raised plant P-content, biomass and rhizosphere soil Olsen P at Zadoks Scale 62 simultaneously. Inoculations variably increased plant potassium (K-), magnesium (Mg-), zinc (Zn-), and managenese (Mn-) contents at harvest (Zadoks 92) but not earlier (Zadoks 31 and 61). The enrichment of the inoculated plants with nutrients other than P indicates the presence of alternative plant growth promoting mechanisms. This study showed that promising phosphate solubilizing microorganisms could increase not only the P content of the plants, but also the soil available P in rhizosphere transiently.

Isolation and characterization of N2‐fixing bacteria from giant reed and switchgrass for plant growth promotion and nutrient uptake

“…In contrast to total nutrient uptake, nutrient concentration was increased by inoculation with the selected strains. In agreement with others [75], we observed a higher increase for micro-nutrients as compared to macronutrients in inoculated plants. Moreover, S. trueperi NNA-14, significantly promoted growth of maize, measured by root morphology; and S. trueperi NNA-14 and S. trueperi NNA-19 significantly promoted growth of wheat, measured both by biomass accumulation, and root morphology.…”

Phosphorus Availability in Wheat, in Volcanic Soils Inoculated with Phosphate-Solubilizing Bacillus thuringiensis

“…This may be a strategy to increase the availability of P or other nutrients in the soil and provide a greater uptake for plants through changes in the pH rhizosphere induced by roots or microorganisms. The increase in available P, by 11%, with inoculation (Z46 Ultisol) has also been reported in previous studies [34,35]. In turn, Ogut and Er [35] also observed an increase in the available P in the rhizosphere of wheat inoculated with Bacillus sp.…”

“…The increase in available P, by 11%, with inoculation (Z46 Ultisol) has also been reported in previous studies [34,35]. In turn, Ogut and Er [35] also observed an increase in the available P in the rhizosphere of wheat inoculated with Bacillus sp. after 31 days of the Zadoks scale.…”

“…Wani et al [41] observed that inoculation with Bacillus or Pseudomonas alone did not significantly affect the biomass of chickpea plants 45 and 90 days after sowing. Ogut and Er ( [35], observed increases in those parameters in wheat plants inoculated with Bacillus sp. and other strains.…”

Effect of Plant Growth Promoting Bacteria on the Growth of Wheat Seedlings Subjected to Phosphate Starvation

“…There are reports of promotion of plant growth after inoculation with commercial PGPB, which solubilize inorganic Pi and mineralize organic P in soils. In addition, such inoculants have been shown to influence root growth and the expression of Pi transporter genes [24][25][26]. Some recent studies have focused on the isolation, characterization and evaluation of PSB and PMB with potential to promote plant growth under sub-optimal conditions [27][28][29][30][31].…”