Keywords: Antibacterial activity, Siderophores
, Indole acetic acid, cell wall degrading enzymes.
Microbes such as bacteria and fungi secret natural compounds known as siderophores
to siphon essential nutrients like iron from their hosts.
Pyoverdines: pigments, siderophores
and potential taxonomic markers of fluorescent Pseudomonas species.
Chrome azurol sulfonate assay agar was used for the siderophores
production (Schwyn and Neilands, 1987).
and pseudocapsule of alginate are the factors that help in protecting the bacterium from antibiotics, phagocytosis and dehydration.4 Elastase and type III secretion system contribute to pneumonia caused by P.
present in the secondary metabolites of bacteria are known to play bioactive roles, including the chelation of metals (21).
To promote growth, PGPR use different mechanisms of action such as the production of phytohormones, antibiotics, hydrocyanic acid, lytic enzymes, siderophores
, phosphate solubilisation, and nitrogen fixation (Glick, 2012; Souza et al., 2015).
pneumoniae, such as the capsule that protects bacteria from both phagocytosis and lethal serum factors, plasmid-borne rmpA (regulator of mucoid phenotype A), fimbriae, lipopolysaccharides and siderophores
. (3,6,8) The kind and number of virulence factors influence the type of K.
They hypothesized that some of these genes, including those producing iron-acqusition molecules called siderophores
, might be good biomarkers.
Some examples of these mechanisms are nitrogen fixation, regulation of plant growth, phosphorus solubilisation and the production of siderophores
(Ahemad and Khan 2011; Vejan et al.
The isolates of endophytic bacteria that showed in vitro positive activity for the reduction of nitrogen to ammonium ion, solubilization of phosphates, production of indol acetic acid and siderophores
, were selected and proceeded to it is purification and identified by Gram stain for the use of the protocol for the extraction of genomic DNA from Gram-negative or Gram-positive bacteria.
Thirdly, Rhizobium produces Fe career compound called siderophores
which tends to increase the Fe content in the rhizosphere soil [33, 34].