Plant growth promotion of wheat inoculated with Penicillium radicum sp. nov.

Abstract

A phosphate-solubilising isolate of Penicillium radicum (sp. nov.) was used to inoculate wheat (Triticum aestivum cv. Dollarbird) in a glasshouse experiment and a field trial, using low pH soils at 5 levels of phosphate application. When data for all phosphate application levels were combined, inoculation by P. radicum resulted in 14% increases in wheat yield in the field trial and increases in both phosphate uptake (10%) and yield (9%) in the glasshouse. In the glasshouse, the response to inoculation was higher at the nil phosphate application level (17%) than for the combined phosphate application levels (9%). This negative interaction indicates that growth promotion could be partially due to soil phosphate solubilisation by the fungus, with a greater response for soils with lower available P. However, other plant-growth promotion mechanisms may also be involved.

Response of Cold-Tolerant Aspergillus spp. to Solubilization of Fe and Al Phosphate in Presence of Different Nutritional Sources

“…Use of P-solubilizing fungi in plant nutrition is well reported [28,29]. In the present study, the three fungal cultures exhibited their ability to enhance the growth of two crops.…”

Evaluation of yield and quality parameters of phosphorous-solubilizing and N-fixing bacteria inoculated in wheat (Triticum aestivum L.)

“…Combined nitrogen and phosphorus may be reflected in yield increase better than single treatments because these elements may affect the intake of each other. Whitelaw et al (1997) reported that combined treatment of phosphate-solubilizing and nitrogen-fixing bacteria increased P intake and promoted plant growth. Çakmakçı (2007) reported higher bacteria efficiency for combined inoculations.…”

“…Belimov et al (1995) also reported improved plant nutrient balance with combined treatments of phosphate-solubilizing and nitrogen-fixing bacteria. Phosphate-solubilizing Bacillus species promote growth through P nutrition (Banik and Ninawe, 1988;Whitelaw et al, 1997) and increase intake of other elements (Biswas et al, 2000). Çakmakçı et al (1999) reported that B. polymyxa and B. megaterium treatments increased kernel yield of barley respectively by 12.4% and 9.2% in sandy soils and by 17.1% and 7.8% in loamy soils, and combined inoculation increased yield by 17.0% in sandy and 19.4% in loamy soils.…”

Interactions between arbuscular mycorrhizal fungi and phosphate-solubilizing fungus (Mortierella sp.) and their effects on Kostelelzkya virginica growth and enzyme activities of rhizosphere and bulk soils at different salinities

“…Phosphorous-solubilizing microorganisms (PSM) are able to replenish soil solution P by solubilizing insoluble native and applied rock phosphate (Rao 1992;Gyaneshwar et al 2002b;Khan et al 2007). Although P-solubilizing bacteria (PSB) have received greater attention than P-solubilizing fungi (PSF), the latter are more effective in solubilizing P compounds (Kucey 1983;Whitelaw et al 1997). Moreover, PSF do not lose the P dissolving activities upon repeated subculturing under laboratory conditions as the PSB do (Kucey 1983;Rashid et al 2004).…”