Spores an conidia (in KOH) of sunflower white ...

The image presents a microscopic view of spores and conidia from the sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopognis). The specimen was collected from the underside of squaw-weed leaves in Washington-on-the-Brazos, Texas on March 7, 2023.

**Key Features:**

* **Spores and Conidia:** The image primarily features spores and conidia. Spores are asexual reproductive structures that can be single-celled or multicellular, depending on the fungus species. They often have distinct shapes and sizes, which help in their identification.
* **KOH Mounting:** The specimen is mounted in potassium hydroxide (KOH), a common mounting medium used for microscopic examination of fungal spores and other biological specimens. KOH treatment helps to clear the sample by dissolving cell walls and other materials, providing better visualization under the microscope.
* **Coloration:** The spores appear yellowish-brown to brown in color, which is typical for many fungal species. This coloration may be due to the presence of pigments or the way the KOH treatment affects the sample's appearance.
* **Shape and Size:** While specific details about the shape and size of these spores are not provided, they likely vary in size and have distinct shapes that could aid in their identification based on microscopic characteristics.

**Conclusion:**

The image shows a collection of fungal spores and conidia from the sunflower white rust fungus Pustula tragopogonis. The specimen was collected during a field study and mounted in KOH for examination under the microscope. – AI vision