Pre-Poured Agar Plates for Cultures & Spore Germination (10 pack)
Each 90 mm x 15 mm dish contains pre-sterilized potato dextrose agar (PDA) or malt extract agar (MEA). These pre-poured agar petri dishes are ideal for growing out fungal cultures, cloning wild mushroom specimens, and germinating fungal spores.
The product is sold in packs of 10 petri dishes.
Storage and Usage
Store your unused dishes upside down in the refrigerator. It’s best to keep them in their original container to prevent contamination. In the absence of a refrigerator, store them in a cold room.
Check for condensation from time to time. Condensation in the plates means there is a heat source driving out water from the agar, which will dry it out quickly. Let your plates equilibrate to room temperature before use.
Frequently Asked Questions
What Is Agar in a Petri Dish?
Nutrient agar is a jellylike substance used for the cultivation of microbes, like bacteria and fungi. It has two principal components: agarose and agaropectin. This jellylike substance provides a place and nutrients to grow different types of bacteria and fungi.
Here at North Spore, we use PDA or MEA in our agar plates. PDA is made from potato infusion, water, and dextrose and is the most widely used nutrient medium to grow bacteria and fungi. On the other hand, MEA is made using malt extract as the main ingredient. It contains a high amount of peptone water and is acidic.
How Much Agar Is Needed for a Petri Dish?
According to the University of Utah Genetic Science Learning Center, you will need to pour about 25 milliliters of the substance into a 100-millimeter dish to make an agar plate. Other sources say agar plating requires you to pour around 20 to 30 milliliters per plate or an amount enough to cover the bottom.
Why Is Agar Used for Growing Bacteria?
Agar plates are used to grow bacteria for many reasons. The gelatinous substance is also widely used because it can grow different types of fungi. It can also be found in many places. Finally, this jellylike substance provides a semisolid place where microbes can grow, but they cannot consume it as food.
Agarose, which is a component of agar, is also used to make agarose plates. However, agarose is often used in molecular biology to separate large molecules, like DNA, via electrophoresis.