Aleksandrow Agar – HX-MEDIA

Product Overview

Aleksandrow Agar is a specialized selective medium formulated for the isolation, enumeration, and screening of phosphate-solubilizing microorganisms (PSM) from soil and environmental samples. It is particularly useful in identifying microbes that can convert insoluble inorganic phosphates into soluble forms through the production of organic acids and enzymatic activity.

The medium contains insoluble phosphate compounds (such as tricalcium phosphate), which serve as the key indicator component. Microorganisms capable of solubilizing phosphate produce clear halo zones (zones of clearance) around their colonies due to the dissolution of these compounds. Aleksandrow agar this visual differentiation allows for easy detection and selection of efficient phosphate-solubilizing strains.

Aleksandrow Agar supports the growth of beneficial soil bacteria such as Bacillus, Pseudomonas, and other rhizosphere microorganisms that play a vital role in enhancing soil fertility and plant growth. These microbes are extensively studied for their application in biofertilizers and sustainable agriculture.

Aleksandrow Agar is widely used in agricultural microbiology, soil analysis laboratories, environmental research, and biotechnology sectors. It aids in the screening of microbial strains for nutrient cycling, soil health improvement, and eco-friendly farming practices.

Aleksandrow Agar is valued for its clear visual results, reliable performance, and effectiveness in isolating functional microbial populations, making it an essential tool in advanced microbiological and agricultural research.

• Detect microbes capable of releasing plant-available potassium (K⁺) from insoluble potassium-bearing minerals such as feldspar or mica.

• Used widely in agricultural microbiology, soil fertility studies, and biofertilizer research.

🎯 Applications

• Screening soil microbes with potassium-solubilizing ability

• Developing biofertilizers

• Studying nutrient cycling and plant–microbe interactions

• Evaluating isolates for agricultural use (e.g., improving soil K availability)

🔬 Key Features

• Selective medium for isolating potassium-solubilizing microorganisms (KSM).

• Differential — organisms that solubilize potassium form a clear halo zone around colonies.

• Contains insoluble potassium minerals (e.g., mica/feldspar) as the only K source.

• Suitable for both bacteria and fungi that mobilize mineral-bound potassium.

• Supports screening for agricultural and environmental microbiology applications.

• Helps identify strains useful for biofertilizer and soil nutrient enhancement research.

🧪 Composition (Typical)

• Glucose – carbon/energy source

• Magnesium sulfate (MgSO₄·7H₂O) – magnesium for metabolic activity

• Calcium carbonate (CaCO₃) – pH buffering

• Potassium aluminosilicate mineral (mica or feldspar) – insoluble potassium source

• Ferric chloride (FeCl₃) – trace iron

• Agar – solidifying agent

🛠️ How to Use

1. Prepare medium, autoclave at 121°C for 15 min, pour into sterile plates.

2. Inoculate soil samples or isolates onto the agar surface.

3. Incubate at 28–30°C for 3–7 days.

4. Interpret results: colonies with clear halos indicate potassium solubilization.

👍 Ideal For

✔ Soil microbiology labs

✔ Agricultural and plant science research

✔ Screening K-solubilizing microbes for biofertilizer development

✔ Studies on nutrient cycling and plant–microbe interactions