Antimicrobial activities of rhizobacterial strains of Pseudomonas and Bacillus strains isolated from rhizosphere soil of carnation (Dianthus caryophyllus cv. Sunrise)

Abstract

Under the present study, an attempt was made to characterize rhizobacteria i.e. Pseudomonas and Bacillus species isolated from rhizosphere of carnation to evaluate their growth promoting effect on carnation so as to select and develop more effi cient indigenous plant growth promoting and disease suppressing bioagents of specifi c soil type and specifi c plant type. Maximum strains of Pseudomonas and Bacillus sp. showed signifi cant antimicrobial activities against most of the microorganisms tested. On the basis of in vitro antagonistic activities ,the best strains were selected and used in fi eld trial to study the infl uence of these strains on the growth of carnation. Results have shown marked effect on growth parameters and disease incidence has also been reduced signifi cantly.

Biocontrol Potentials of Antimicrobial Peptide Producing Bacillus Species: Multifaceted Antagonists for the Management of Stem Rot of Carnation Caused by Sclerotinia sclerotiorum

“…Bacillus species in the natural environment can produce novel beneficial metabolites that promote plant growth and yield (Sharma and Kaur, 2010). B. amyloliquefaciens (SQR9) enhanced growth promotion in maize plants (Zhang et al, 2015).…”

Preferential Promotion of Lycopersicon esculentum (Tomato) Growth by Plant Growth Promoting Bacteria Associated with Tomato

“…In the present study, a total of 74 different bacterial isolates from tomato plant were characterized for PGP activity, besides testing the host-specificity, if any, for the selected strains to promote growth. Bacteria were isolated from different parts of plant-rhizoplane, -rhizosphere, -phylloplane and from the bulk soil, to exploit their putative plant growth promotion activities [13,14]. PGP microbes were mainly soil-and rhizosphere-dwelling communities, able to colonize plant roots in significant numbers and influence plant growth in a positive manner.…”

Isolation of previously uncultivable bacteria from a nickel contaminated soil using a diffusion-chamber-based approach

“…In general, the antibacterial activities of the representatives of b-Proteobacteria are less common and so negative results among these bacteria have been broadly anticipated. Some of the g-Proteobacteria representatives, mainly of Pseudomonads, are known for their antibacterial activities (Isnansetyo et al, 2003;Charyulu et al, 2009;Sharma and Kaur, 2010), so their expression of this feature is not surprising.…”