STEP 4: Identifying Yeast - Agar Plates

Here are the pictures of your samples after they have been allowed to grow on agar plates. Agar plates contain nutrients that allow the organisms to quickly grow into colonies that are large enough to see with the naked eye. Yeasts typically grow into round, creamy white colonies that are somewhat raised.

Click the link to learn more about the science behind this step of the Yeasty Beasties process.

Fresh
And 
Clean

#559

There was no growth! Looks like your sample didn't have yeast! Please submit more to assist in the hunt for Palouse yeasts! 

#560

Consistent white circles that aren't shiny? Those look like yeast! This will be moving on to the microscope! 

#561

This was a clear mound looking growth! It wouldn't be yeast!

Please submit more to assist in the hunt for Palouse yeasts! 

#562

Those are small shiny colonies, that means that those are likely bacteria! Not yeast this time! Please submit more to assist in the hunt for Palouse yeasts! 

#563

Look at that! Those look like yeast! They aren't shiny and they're white circular spots!

This will be moving on to the microscope! 

#564

There was no growth on the agar. So you didn't find yeast this time!

Please submit more to assist in the hunt for Palouse yeasts! 

#565

This doesn't look like yeast growth! Yeasts form small spots called colonies that are white in color. Please submit more to assist in the hunt for Palouse yeasts! 

#566

There was a small bacterial colony on the plate but we didn't get any yeast! Please submit more to assist in the hunt for Palouse yeasts! 

#567

This plate was overtaken by a filamentous fungi! They could have overtaken any yeasts that may have been on your fruit or maybe there were no yeast! Please submit more to assist in the hunt for Palouse yeasts. 

#568

There is a growth but it doesn't look like yeasts. Yeasts form small round colonies. Please submit more to assist in the hunt for Palouse yeasts! 

#569

There were no yeast from this sample. Please submit more to assist in the hunt for Palouse yeasts! 

#570

Nothing grew! Please submit more to assist in the hunt for Palouse yeasts! 

#571

There is some growth! This growth looks like it is bacteria and not yeast. The colonies are shiny which yeast generally aren't but we will see how it looks under the microscope! 

#572

There are two types of growth on this plate! The more yellow colored colonies are bacteria but the white colonies look like yeast! We will see how they look under the microscope! 

#573

The smaller white spots look like yeast colonies! We will take a look at these under the microscope to see if they are 

#574

This growth looks like yeast! We have colonies that aren't shiny and are white! This is likely yeast! We will look at it under a microscope to check! 

#575

The growth here looks like yeast! The colonies are white and not shiny! We will look at them through a microscope to identify them! 

#576

You can see some different looking colonies on the plate. There is a white shiny colony and a not shiny white colony. The not shiny white colony might be yeast! We will look at it through a microscope to tell! 

#577

This growth looks like yeast! There are a couple types of colonies on the plate but a couple look like yeast! We will look at them under the microscope! 

#578

This plate is clean and clear! There was no yeast growth! Please submit more to assist in the hunt for Palouse yeasts! 

#579

This growth might be yeast! It is really hard to tell because it is pretty shiny but it looks a lot like yeast! We will look at it through a microscope to see! 

#580

The plate was taken over by a filamentous fungi, like mold! We couldn't find yeasts on your plate! Please submit more to assist in the hunt for Palouse yeasts! 

#581

It looks like you found yeast! We will need to look at it through a microscope to confirm this but this looks like yeast! Let's move onto the next step! 

#582

This looks like a yeast growth! The colonies are white and they're not shiny! This looks good for yeast growth! We will look at it under a microscope! 

#583

This may be yeast growth but it could also be bacteria growth. To tell we will look at it under the microscope! 

#584

See the different looking spots in the thick growth on the right side of the plate? That means there are two organisms growing here! One of them does look like yeast! We will look at it under the microscope and see! 

#585

It is hard to tell but there are two different types of growth on this plate! One of them looks a lot like yeast! We will look at it under the microscope to tell for sure! 

#586

There was no growth on this plate! Please submit more to assist in the hunt for Palouse yeasts! 

#587

Nothing grew on the plate! Please submit more to assist in the hunt for Palouse yeasts! 

#588

This is hard to tell. This could either be yeast growth or bacteria growth! We need to look at it under the microscope to tell! 

#589

You can see colonies of two different sizes! These are two different organisms! The bigger white ones look like yeast colonies! We will look at them under the microscope! 

#590

These colonies look like either yeast or bacteria. We need to look at it under the microscope to tell! 

#591

The plate has a filamentous fungus on it, the large fuzzy looking part of the plate and the other growths are bacterial. Please submit more to assist in the hunt for Palouse yeasts! 

#592

Look at all the different organisms on this plate! All of those different looking colonies are different organisms! None of them look like yeast though. Please submit more to assist with the hunt for Palouse yeasts! 

#593

None of this growth looks like yeast growth but you have some funky bacterial growth on the plate! Please submit more to assist in the hunt for Palouse yeasts! 

#594

There are some really cool looking bacterial growths on this plate but none of them look like yeast! Please submit more to assist in the hunt for Palouse yeasts! 

#595

Nothing grew from this sample! Please submit more to assist with the hunt for Palouse yeasts! 

The University of Idaho, Moscow.

Department of Biological Sciences

  • Twitter Clean Grey
  • LinkedIn Clean Grey