Plant growth promoting rhizobacteria in the production of English ryegrass

Abstract

The effect of inoculation with Pseudomonas fluorescens and Bacillus subtilis on the yield of fresh and dry mass of English ryegrass (Lolium perenne L.) as well as on the number of rhizospheric microorganisms was studied. The microorganisms were introduced into the soil before sowing. The control plots were not inoculated. The number of microorganisms was determined after the third mowing. The yield was determined after the first, second and third mowing. In comparison with the control, after the first and second mowing, there was a statistically significant increase in the fresh and dry mass in both inoculated variants whereas after the third mowing, a statistically significant increase in the yield of fresh mass was recorded only in the variant with B. subtilis. The use of B. subtilis had a better effect on the total yield of the fresh and dry mass of English ryegrass. The number of the investigated groups of microorganisms, apart from actinomycetes, increased in the inoculated variants. Inoculation of P. fluorescens affected the increase of total number of bacteria and aminoheterotrophs whereas inoculation of B. subtilis affected the increase of the number of azotobacter and fungi.

Enhancement of Cellulose Rich Organic Matter Degradation by Inoculation with Streptomyces sp. Strains

“…Our research showed that the tested strains were neither particularly good users of sugars (lactose by CA1 and sucrose by PA7) nor did they grow in medium with added NaCl (only CA1 grew at 3% NaCl). Those results are in contrast to those of Stamenov et al (2016), who concluded that the Streptomyces isolates used glucose, galactose, fructose, sucrose, lactose and xylose as C source and grew in media with elevated salinity (added 3-7% NaCl). On the other hand, Dhanasekaran et al (2009) found that Streptomyces DPTD-5 and S. bikiniensis used sucrose, lactose and fructose as carbon source.…”

Influence of Pseudomonas and Bacillus Strains Isolated from Lolium perenne Rhizospheric Soil in Vojvodina (Serbia) on Planth Growth and Soil Microbial Communities

“…P12 isolate. Similarly to this study, Stamenov et al (2012a) identified the positive effect of Pseudomonas fluorescens and Bacillus subtilis strains on the height and dry weight of English ryegrass. Garcia et al (2004) noticed a positive effect of inoculation with Bacillus lichenoformis on plant yield.…”

“…Microorganisms were isolated from the roots and root-adhering soil of 30 days old plants (L. perenne L. Calibra) grown in carbonate chernozem type of soil (Stamenov et al, 2016). The 10 g samples of roots with tightly adhered soil were suspended in 90 ml of 0.1 M MgSO 4 • 7H 2 O buffer and shaken for 10 min at 180 rpm on a rotary shaker.…”

Plant Growth Promotion Rhizobacteria in Onion Production

“…Similar results were shown by Jarak et al (2006) who reported a better germ development and early growth of alfalfa and red clover with the use of azotobacter, rhizobia and actinomycetes. Similarly, Stamenov et al (2012b) reported that PGPR enhance the growth of English ryegrass. Joo et al (2005) inoculated the pepper seed with Penibacillus polymyxa and Bacillus subtilis.…”