Plant growth promoting potentials ofPseudomonasspp. strain OG isolated from marine water

Abstract

Bacterium Pseudomonas spp. olive green (OG) was isolated from marine water, yet, it was characterized as plant growth promoting bacterium (PGPB). Multiple plant growth promoting traits of OG isolate were determined in vitro. It was tested positive for Indole-3-acetic acid (IAA) production with 29 mg ml (1 of IAA yield, phosphate solubilization with 34 mg ml (1 solubilization of Tri-calcium-phosphate and it showed maximum of 32 mg ml (1 of ammonia production. OG isolate was affirming siderophore production, hydrocyanic acid (HCN) production and catalase production. 16S rRNA gene sequence comparison was used to identify the isolate which showed its closest neighbor to be Pseudomonas fluoroscens strain BCPBMS-1. Efficacy of this PGPB was tested on the seedling growth of two test plants chickpea and green gram. Both the test plants treated with OG-based talc bioformulation showed significant growth promotion. Chickpea showed enhanced overall fresh biomass by 24%, overall dry biomass by 27% was observed after 15 days of seeded in pots. Green gram showed enhanced overall dry biomass by 28% was observed after 10 days of seeded in pots.

Describing Paenibacillus mucilaginosus strain N3 as an efficient plant growth promoting rhizobacteria (PGPR)

“…To portray any rhizobacterial strain as PGPR, it should be recognized to IAA production, phosphate solubilization, ammonia production, nitrogen fixation, and siderophore production, further, it is inevitable for strain to show plant growth promotion in vivo under pot trials (George, Gupta, Gopal, Thomas, & Thomas, 2013;Goswami et al, 2013). Our previous reports suggest that Pseudomonas spp.…”

“…The talc-based formulations of N3 isolate was prepared by the method described by Goswami, Vaghela, Parmar, Dhandhukia, and Thakker (2013). Briefly, talc powder was taken in a sterilized metal tray and its pH was adjusted to neutral by addition of 15 g of CaCO 3 per kg of talc.…”

Chemical diversity of microbial volatiles and their potential for plant growth and productivity

“…These bacteria are collectively defined rhizobacteria and many of them promote plant growth (Bhattacharyya and Jha, 2012), whereas the root environment they colonize is called the rhizosphere (Mendes et al, 2013). Among rhizobacteria, Pseudomonads have been considered to be important rhizosphere organisms (Goswami et al, 2013). VOCs produced by rhizobacteria are involved in their interaction with plant-pathogenic microorganisms and host plants and show antimicrobial and plant-growth modulating activities (Vespermann et al, 2007).…”

Gibberellins synthesized by the entomopathogenic bacterium, Photorhabdus temperata M1021 as one of the factors of rice plant growth promotion

“…SE188 , Burkholderia cepacia SE4 (Kang et al 2010), Pseudomonas spp. (Goswami et al 2013) have been successfully analyzed for the GAs production. Entomopathogenic bacteria have been recently reported to produce plant growth regulators (Raddadi et al 2008), that not only improve plant growth and development but also enhance the fitness of the host against a diverse array of environmental stresses Kang et al 2012).…”