Paenibacillus polymyxa is an endospore-shaping bacterium that is non-pathogenic and found in conditions, for example, plant establishes in soil and marine sediment.

P. polymyxa is a Gram-positive, bar formed bacterium, that is additionally motile. It accomplishes movement by means of peritrichous flagella. The extensive variety of capacities of this bacterium are to settle nitrogen, deliver hormones that advance plant development.

They create hydrolytic chemicals, and to deliver antimicrobials against the destructive plant and human microorganisms. It can also help plants in ingestion of phosphorus and upgrade soil porosity.


This organism has a job in biological system capacity and potential job in modern procedures. In farming biological systems P. polymyxa can advance plant development through three instruments.

The principal component is the creation of hormones like cytokinins, auxins, ethylene and gibberellins. These mixes increment root extension and plant development. The second component is the creation of antimicrobials and advancing insusceptibility of rhizosphere.


NameBacillus Polymyxa
Scientific NamePaenibacillus Polymyxa
SynonymsClostridium polymyxa,
Granulobacter polymyxa,
Aerobacillus polymyxa,
Pseudomonas azotogensis


The history of Paenibacillus Polymyxa is given below:


Paenibacillus was initially arranged under the sort Bacillus until the point when it turned into its own variety in 1993. This refinement was made utilizing a similar examination of the 16S rRNA quality grouping of three distinct bacilli.

This sufficiently demonstrated phylogenetic separation from Bacillus subtilis to warrant another class. Paenibacillus (paene + Bacillus) implies nearly Bacillus in Latin.

Fossil Records

P. polymyxa SC2 and P. polymyxa E681 have had their whole genomes sequenced. The total genome of Paenibacillus Polymyxa SC2 is made out of a 5.7 Mb roundabout chromosome with around 5,400 coding qualities and a 510 kb plasmid with around 649 coding qualities.

The entire genome of P. polymyxa E681 is made out of a 5.3 Mb round chromosome with around 4,800 qualities and no plasmids. P. polymyxa SC2 and E681 have 54.58% and 45.80% G+C content individually.


It was discovered that P. polymyxa has a few qualities engaged with anti-infection biosynthesis encoded in the chromosome

Distinctive Features Of Paenibacillus Polymyxa

Natural acids can influence the warmth opposition of spores. Whenever Paenibacillus Polymyxa isn’t in an endospore frame, it has peritrichous flagella that guide in motility and swarming.


P. polymyxa is a chemoorganoheterotroph that can settle environmental nitrogen and is a facultative anaerobe. As a facultative anaerobe, it can perform vigorous breath within the sight of oxygen or change to maturation when oxygen levels are low.

It can utilize an assortment of natural carbon sources, for example, glucose, sucrose, maltose, and arabinose and can deliver various metabolites, for example, acetoin, lactate, and ethanol. It is also a mesophile that develops ideally around 30°C and the ideal pH is around 4-7.

P. polymyxa additionally can create H2 gas as a side-effect amid a fermentative procedure that is influenced by both pH and temperature. This fermentative procedure, called acetogenesis, yields acetic acid derivation, hydrogen and CO2.


This can be utilized as antecedents by methanogens to deliver methane. P. polymyxa has the remarkable ability to incorporate anti-microbials/antifungal mixes. Three of these mixes incorporate polymxin, paenibacillin, and fusaricidin.


P. polymyxa is an anaerobic nitrogen-settling Gram-positive bacterium that is pole molded, 0.6 by 3.0 μm in size, and delivers pale provinces on agar. For proliferation, it separates into ellipsoidal spores which unmistakably swell the mother cell.

The endospore can develop when conditions are more reasonable. Spore germination of Paenibacillus Polymyxa can be impacted by numerous elements including heat actuation and supplements.


Metabolites, for example, polymyxin E1 and a lantibiotic also diminish the colonization of pathogens in poultry and shrimp hatchlings. The other region of utilization of metabolites delivered by the bacterium is bioflocculation caused by metabolites, for example, 2,3-butanediol (BDL).

The bacterium has also been utilized for the division of hematite, pyrite and chalcopyrite. Waste and faucet water treatment and aging are different regions of the modern use of P. polymyxa.


The ecology of Paenibacillus polymyxa is given below:


Heulin et al. (1994) saw that opposing the action of Paenibacillus Polymyxa diminished the movement of two plant pathogenic fungi. The third component is the bacterium’s nitrogen settling capacity that can deliver a type of nitrogen (alkali NH3) that is usable by plants from air N2.

Also, soil vacillation and porosity is enhanced because of natural mixes discharged from P. polymyxa into the dirt. The wide scopes of utilization of P. polymyxa in the industry are because of optional metabolites delivered by this bacterium.

Food Habits

The antimicrobial mixes are compelling against an extensive variety of Gram-positive and Gram-negative bacterial species in this manner the microscopic organisms can be utilized in biopreservation of nourishment and medicinal applications.

This bacterium produces auxiliary metabolites that have wide applications in rural biological communities, biopreservation in nourishment and medication industry, bioflocculation in wastewater and mineral preparing.


P. polymyxa is found in an assortment of situations, for example, soils, the rhizosphere of plants, and marine silt. In the rhizosphere, P. polymyxa has pathogenic qualities against malicious microorganisms.

It also has a cooperative association with plants by attacking their underlying foundations and shaping biofilms. Creation of hormones and nitrogen obsession are other useful exercises of the bacterium in soil and rhizosphere.


P. polymyxa additionally has the opposing movement against Vibrio species and numerous other human and creature pathogenic microorganisms. Consequently, it has been utilized underway of business antimicrobials.

Polymyxin B, one of the anti-infection agents created by P. polymyxa, is one of the mixes found in the normal antibacterial topical cream Neosporin. It has a one of a kind ability to shield tomato seedlings from a bacterial shrink.

Bacterial wither is caused by Ralstonia solanacearum, a bacterium found in the dirt that taints plants. R. solanacearum attacks the plant through the roots and colonizes in the vascular packages in the xylem vessels.

As it develops and duplicates, it obstructs the transportation of water and supplements. P. polymyxa can keep this bacterial shrivel by colonizing and shaping a biofilm around the underlying foundations of the tomato seedling, keeping the passage of R. solanacearum.

P. polymyxa additionally has potential uses in bioremediation. It encircles itself with a compound called exopolysaccharide, in other words, biofilm arrangement and sticking to plant roots and soil particles.

This exopolysaccharide can be utilized as a cheap and effectively cultivable compound to expel cadmium (Cd2+) from watery arrangements. This is accomplished by the ingestion of cadmium in the fluid arrangement into the exopolysaccharide of Paenibacillus Polymyxa.

Furthermore, P. polymyxa can be utilized in the bioremediation expulsion of receptive blue 4 (RB4), a color utilized on textures that aren’t promptly expelled from water by wastewater treatment forms.

Watanapokasin et al. (2008) watched decolorization with color evacuation by P. polymyxa alongside a hydrogen side-effect that could be utilized as a potential vitality source. This decolorization happened through a procedure called acidogenesis.


Known Hazards

A few sorts of Bacillus microscopic organisms are destructive to people, plants, or different life forms. For instance, Paenibacillus Polymyxa causes deterioration in canned foods and food harming of the brief term.

B. polymyxa is a typical contaminant of lab societies and is frequently found on human skin. Most strains of Bacillus are not pathogenic for people but rather may, as soil life forms, taint people by chance.

An eminent exemption is B. anthracis, which causes Bacillus anthracis in people and local creatures. B. thuringiensis produces a poison (Bt poison) that causes illness in creepy crawlies.

Health Benefits

P. polymyxa is utilized as a dirt inoculant in agribusiness and cultivation. Biofilms of P. polymyxa developing on plant attaches have been appeared to deliver exopolysaccharides which shield the plants from pathogens.

The associations between this bacterial species and plant roots additionally prompt the root hairs to experience physical changes.

Medicinal Uses

A few strains of Paenibacillus Polymyxa create polymyxin anti-toxin mixes. Surfactant buildings confined from P. polymyxa have been appeared to be successful in disturbing biofilms of Bacillus subtilis, Micrococcus luteus, Pseudomonas aeruginosa, Staphylococcus aureus and Streptococcus bovis.

Similar Species

Paenibacillus alvei

Paenibacillus koreensis

Paenibacillus dendritiformis

Paenibacillus foulbrood

Fun Facts

Some fun facts of Paenibacillus polymyxa are:

fun facts

Apart from being fun, they are hazardous as well.



Amna Shaheen

I have done Bachelors in Computer Software Engineering from Foundation University in 2017. Now, I am doing MS in Project Management and I am a blogger at TapeDaily. I am very passionate about plants and animals. I like to study about them, so I write blogs that are related to plants and animals.

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