Pseudomonas fluorescens

Soil Probiotic for Induced Systemic Resistance, Root Health & Nutrient Uptake

Pseudomonas fluorescens is a metabolically active, non-spore-forming biofertilizer that enhances plant immunity, nutrient efficiency, and microbial diversity in the rhizosphere. Through siderophore production, auxin synthesis, biosurfactant activity, and systemic resistance induction, this microbial inoculant supports robust crop establishment, improved soil health, and resilience under stress. Ideal for organic, regenerative, and integrated crop systems.

Activates induced systemic resistance (ISR) pathways that support natural plant resilience under environmental and biological stress, without acting as a biopesticide
Promotes microbial balance and diversity in the rhizosphere through rapid colonization and biosurfactant production
Enhances root development and early plant vigor via auxin and metabolite activity
Mobilizes phosphorus, iron, and micronutrients through organic acids and siderophores
Improves tolerance to drought, salinity, and low fertility through enhanced root metabolism

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Induces Systemic Resistance (ISR) in Plants

Activates plant defense signaling pathways that help crops better tolerate environmental and biological stress without functioning as a direct biocontrol agent.

Activates plant defense signaling to support adaptive responses
Supports natural resilience in plants exposed to biological and environmental challenges
Activates defensive enzymes and secondary metabolites within plant tissues

Enhances Rhizosphere Microbial Balance

Acts as a beneficial soil bacteria that rapidly colonizes the rhizosphere and promotes beneficial microbial communities that improve soil microbial diversity and resilience.

Rapid colonizer of root surfaces and rhizosphere, promoting beneficial microbial communities
Produces biosurfactants and metabolites that promote a favorable microbial environment in the root zone
Contributes to microbial diversity and stability in the root zone

Enhances Plant Growth and Root Development

Functions as a biostimulant and plant growth-promoting rhizobacterium (PGPR) that enhances root elongation, nutrient uptake, and early vigor through microbial metabolite production.

Produces phytohormones such as auxins (e.g., indole-3-acetic acid) that stimulate root elongation and branching
Enhances seed germination, early seedling vigor, and biomass accumulation
Facilitates improved nutrient and water uptake through enhanced root architecture

Improves Nutrient Availability and Uptake

Works as a soil fertility microbe by enhancing the solubilization and uptake of key nutrients through organic acid production, siderophore activity, and microbial synergy.

Functions as a phosphate-solubilizing and potassium-solubilizing bacteria through organic acid secretion
Enhances nitrogen availability through synergistic interactions with other soil microbes
Mobilizes iron and zinc, especially in calcareous or micronutrient-deficient soils

Supports Soil Health and Structure

Operates as a soil health microbe by improving soil function through microbial-driven organic matter decomposition, moisture retention, and soil aggregation.

Participates in organic matter decomposition and nutrient cycling
Produces extracellular polysaccharides that help with soil aggregation and moisture retention
Enhances microbial-driven soil respiration and activity

Degrades Organic Pollutants and Pesticide Residues

Contributes to soil detoxification by breaking down certain pesticide residues and organic pollutants, improving soil and crop health in chemically impacted soils.

Capable of breaking down certain xenobiotics, including aromatic hydrocarbons and pesticide residues
Supports soil detoxification and contributes to the resilience of cropping systems after chemical applications
Helps maintain microbial and enzymatic balance in contaminated soils

Siderophore-Mediated Iron Scavenging

Improves plant iron uptake and rhizosphere dynamics through fluorescent siderophore production.

Produces fluorescent siderophores (e.g., pyoverdine) that bind and mobilize iron from soil particles
Helps alleviate iron chlorosis in crops grown in alkaline or calcareous soils

Increases Abiotic Stress Tolerance

Improves crop tolerance to salinity, drought, and nutrient stress by supporting metabolic function and antioxidant activity.

Improves plant resilience under salinity, drought, and low fertility conditions
Helps maintain root metabolic activity under environmental stress
Supports antioxidant enzyme activity to reduce oxidative damage

Why Choose Our Pseudomonas fluorescens?

High CFU Powder Active Root Colonization – Our Pseudomonas fluorescens is produced as a high-viability powdered inoculant designed for rapid colonization of root surfaces and consistent performance across soil types and crop systems.
Induces Systemic Resistance for Plant Resilience – Triggers induced systemic resistance (ISR), priming plant defenses against environmental challenges without functioning as a pesticide, supporting healthy plant growth under variable conditions.
Enhances Rhizosphere Balance and Microbial Diversity – Promotes beneficial microbial populations in the root zone through biosurfactant production and competitive colonization.
Mobilizes Nutrients via Siderophores and Organic Acids – Solubilizes phosphorus and chelates iron and micronutrients through secretion of organic acids and fluorescent siderophores like pyoverdine, especially valuable in alkaline or low-fertility soils.
Improves Root Development and Nutrient Uptake – Functions as a PGPR by producing auxins and metabolites that stimulate root elongation, boost seedling vigor, and improve nutrient absorption efficiency from early growth stages.
Contributes to Soil Detoxification and Residue Breakdown – Capable of degrading certain pesticide residues and aromatic hydrocarbons, supporting soil recovery and microbial balance in chemically impacted fields.
Compatible with Organic and Regenerative Cropping Systems – Blends well with mycorrhizae, compost extracts, and other microbial biofertilizers. Ideal for fertigation, soil drench, seed treatment, organic farming systems and sustainable nutrient management practices.
Premium Microbial Inoculants from a U.S.-Based Manufacturer – We produce advanced Pseudomonas fluorescens formulations for agriculture, available in bulk, commercial, and private-label formats to meet the evolving needs of organic, regenerative, and conventional growers.

Looking to buy the best agricultural bacteria? Our Pseudomonas fluorescens is trusted by growers seeking sustainable productivity and soil health. Widely used in microbial inoculants, biostimulants, and biofertilizers, it supports nutrient cycling, nitrogen availability, and rhizosphere resilience. As a phosphate-solubilizing and siderophore-producing biofertilizer, it enhances soil fertility and plant health across organic and regenerative systems.

Whether you are looking to buy agricultural microbes and biofertilizers or if you’re selecting the best microbes for soil health to create a custom formulation, Applied Biotech Industries is a trusted U.S. microbial producer offering bulk, wholesale, and private-label solutions.

Concentration (CFU/g):

10 billion (1 × 10¹¹) CFU/g dry powder
Custom concentrations available upon request

Particle Size (Mesh):

Passes through 100 mesh sieve

Packaging Options:

22 lb (10 kg) pails
44 lb (20 kg) pails
340 lb (155 kg) drums
Smaller custom packaging available on request

Shelf-life:

1 month at room temperature
1 year refrigerated
2 years in freezer

Storage Recommendations:

Store in a cool, dry location, ideally refrigerated, away from direct sunlight.
Reseal container tightly after each use.

Soil Application (Drip, Drench, or Fertigation)

Dosage:

40–100 grams per acre (100–250 grams per hectare)

Frequency:

Apply during early root establishment or transplanting
Reapply every 2–4 weeks during active growth stages as needed

Application Method:

Dissolve thoroughly in water (use enough water to reach the root zone)
Use an agitation tank or manual stirring to maintain microbial suspension
Apply through drip irrigation lines, micro-sprayers, or fertigation systems, positioning flow as close to the root zone as possible
Flush the system after application to prevent clogging or residue buildup

Do not tank mix with herbicides, fungicides, bactericides, or chemical pesticides.

In-Furrow

Dosage:

2–4 grams per acre (5–10 grams per hectare)

Frequency:

Apply once at planting to target root initiation and early growth stages.

Application Method:

Dissolve microbial powder thoroughly in water.
Apply directly into the seed furrow or planting trench at seeding time.
If using irrigation systems for delivery, ensure solution contacts the root zone.
Maintain agitation to prevent settling.

When tank-mixing with fertilizers:

Dilute fertilizer fully in water first before adding microbial powder
Do not mix with herbicides, fungicides, bactericides, or pesticides

Foliar Spray

Dosage:

40–100 grams per acre (100–250 grams per hectare)

Frequency:

Begin at vegetative or pre-flowering stages
Reapply every 7–14 days, especially during periods of high stress

Application Method:

Apply in the early morning or evening to reduce UV exposure
Use a non-ionic surfactant or wetting agent for improved adhesion
Ensure thorough coverage of foliage, including undersides of leaves
Agitate spray solution continuously during application

Seed Treatment

Dosage:

1–3 grams per kg of seed

Frequency:

Single application before planting

Application Method:

Mix thoroughly with a sticking agent (e.g., sugar solution, gum arabic)
Coat seeds evenly, ensuring full surface coverage
Allow seeds to dry gently in the shade before sowing

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Q: What is Pseudomonas fluorescens and how is it used in agriculture?

A: Pseudomonas fluorescens is a non-spore-forming, plant growth-promoting rhizobacterium (PGPR) applied as a soil probiotic, microbial inoculant, and biofertilizer. It enhances plant resilience, nutrient uptake, and microbial diversity in the rhizosphere, making it an effective component of organic and regenerative farming systems.

Q: How does Pseudomonas fluorescens contribute to plant nutrient uptake?

A: This strain produces organic acids and fluorescent siderophores that help solubilize phosphorus, iron, zinc, and other micronutrients in the soil. These compounds increase nutrient bioavailability, especially in alkaline or compacted soils where nutrients are otherwise locked up.

Q: What makes Pseudomonas fluorescens unique among beneficial soil bacteria?

A: Unlike spore-formers, P. fluorescens colonizes root surfaces rapidly in its vegetative state. It produces biosurfactants, auxins, and siderophores, offering a broad range of plant-beneficial traits including rhizosphere modulation, iron mobilization, and immune system priming (ISR), all without acting as a pesticide.

Q: Can Pseudomonas fluorescens help plants cope with drought and salinity?

A: Yes. This strain improves stress resilience by supporting root metabolism and promoting antioxidant enzyme activity. It enables crops to maintain nutrient absorption and physiological stability under drought, salinity, and low-fertility conditions.

Q: What role does P. fluorescens play in induced systemic resistance (ISR)?

A: Pseudomonas fluorescens activates plant ISR pathways, which help crops respond more effectively to environmental and biological stressors. It primes natural defense mechanisms without functioning as a pesticide or biocontrol agent.

Q: Is Pseudomonas fluorescens compatible with other microbial inputs?

A: Absolutely. It performs well alongside mycorrhizae, Trichoderma, Bacillus species, and other beneficial microbes. It is frequently included in blended biofertilizers and multi-strain microbial consortia used in sustainable soil management.

Q: Is P. fluorescens appropriate for organic farming?

A: Yes. Its natural origin and absence of synthetic inputs make it suitable for use in organic systems. However, growers should confirm formulation-specific compliance with their certifying body.

Q: How can Pseudomonas fluorescens be applied in the field?

A: It is typically applied as a soil drench, through fertigation, in-furrow treatments, or as a seed coating. Its vegetative form is optimized for quick rhizosphere colonization and is compatible with compost, biofertilizers, and organic inputs.

Q: Does P. fluorescens improve soil health beyond plant growth?

A: Yes. It participates in organic matter decomposition, helps stabilize microbial communities, and produces compounds that enhance soil structure and moisture retention. It also contributes to detoxification in soils impacted by agrochemicals.

Q: Where can I buy Pseudomonas fluorescens and other agricultural microbes?

A: Applied Biotech Industries supplies high-quality Pseudomonas fluorescens for professional agricultural use. Available in wholesale, bulk, and private-label formats, our products are ideal for ag retailers, distributors, and large-scale farms.

Q: What packaging formats are offered for P. fluorescens?

A: We offer Pseudomonas fluorescens as a dry powder and it is available in 22 lb pails, 44 lb pails and 340 lb drums (10 kg pails, 20 kg pails, and 155 kg drums).

Q: What is the shelf life of Pseudomonas fluorescens?

A: When stored in a cool, dry place, our formulation maintains viability for 1 month. When stored in refrigerated conditions, shelf-life is 1 year. When frozen (-4^oC), shelf-life increases to 2 years.

Q: Why choose Applied Biotech Industries for Pseudomonas fluorescens?

A: We are a U.S.-based producer specializing in precision fermentation of agricultural microbes. Our high-CFU Pseudomonas fluorescens is manufactured for consistency, compatibility, and performance in organic, regenerative, and conventional systems.

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Safety Data Sheet (SDS)

**1. Multifaceted Impacts of Plant-Beneficial Pseudomonas spp. in Agriculture**

🔗 Read the study

Key Findings:

Pseudomonas species enhance plant growth by producing phytohormones, solubilizing phosphorus and potassium, and fixing atmospheric nitrogen.
These bacteria also produce lytic enzymes, volatile organic compounds, and secondary metabolites that stimulate plant growth.
They help plants withstand various stress conditions, including heavy metal pollution and oxidative stress.

2. Pseudomonas-Mediated Nutritional and Growth Promotional Activities in Plants

🔗 Read the study

Key Findings:

Pseudomonas species promote plant growth through siderophore production, phosphate solubilization, and nitrogen fixation.
They produce antagonistic compounds that help maintain a mutualistic relationship with plants.
Fluorescent Pseudomonas strains are effective as seed inoculants, enhancing crop yields.

3. Use of Plant Growth-Promoting Bacteria to Enhance Salinity Stress in Plants

🔗 Read the study

Key Findings:

Salt-tolerant rhizobacteria, including Pseudomonas species, can alleviate salinity stress in plants.
These bacteria improve plant growth under salt stress by enhancing nutrient uptake and producing growth-promoting substances.

**4. Inoculation With Pseudomonas fluorescens LBUM677 Impacts the Rhizosphere Microbiome**

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Key Findings:

Inoculating oilseed crops with Pseudomonas fluorescens LBUM677 influences the composition of the rhizosphere microbiome.
The bacterium promotes seed oil accumulation and may enhance plant growth through microbial community modulation.

**5. The Cytokinin-Producing Plant Beneficial Bacterium Pseudomonas fluorescens G20-18**

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Key Findings:

Pseudomonas fluorescens G20-18 produces cytokinins that enhance tomato growth and boost tolerance to drought stress.
Root inoculation with this strain leads to improved plant growth under water-deficit conditions.

6. Pseudomonas fluorescens Transportome Is Linked to Strain-Specific Plant Growth Promotion

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Key Findings:

The transportome (set of transport proteins) of Pseudomonas fluorescens is associated with its ability to promote plant growth under nutrient stress.
Specific transport systems enable efficient nutrient uptake, benefiting plant development.

**7. Mechanisms of Phosphate Solubilization by Pseudomonas fluorescens RAF15**
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Key Findings:

P. fluorescens RAF15 solubilizes insoluble phosphate primarily through the production of organic acids like gluconic and tartaric acids.
The solubilization process is associated with a decrease in pH, correlating with increased soluble phosphorus concentrations.
The strain also exhibits plant growth-promoting traits, including the production of pectinase, protease, lipase, siderophores, hydrogen cyanide, and indoleacetic acid.

**8. Impact of Pseudomonas fluorescens on Nutrient Dynamics in Melon Cultivation**
🔗 Read the study

Key Findings:

Application of P. fluorescens in melon fields significantly enhanced the availability of phosphorus, copper, and microbial biomass carbon in the soil.
The bacterium promoted the absorption of manganese, nitrogen, zinc, and phosphorus in melon plants.
Treated plants exhibited increased fruit size and weight, indicating improved yield and quality.

**9. Characterization of Siderophore Production by Pseudomonas fluorescens LNPF1**
🔗 Read the study

Key Findings:

The LNPF1 strain produces desferrioxamine B, a hydroxamate-type siderophore, facilitating iron uptake in plants.
Inoculation with LNPF1 improved growth parameters and nutrient content in peanut plants, including increased iron and oil content.
The strain also enhanced soil nutrient levels, contributing to better plant health and productivity.

**10. Solubilization of Zinc Phosphate by Pseudomonas fluorescens 3a**
🔗 Read the study

Key Findings:

P. fluorescens 3a effectively solubilizes zinc phosphate through the production of gluconic acid and acidification of the medium.
The process increases zinc availability in the soil, which is essential for various plant physiological functions.
This mechanism demonstrates the bacterium's potential in improving micronutrient accessibility for plants.

Pseudomonas fluorescens