Tissues (in Melzer) of sunflower white rust fungus Pustula ...

The image shows a microscopic view of fungal tissue, specifically from the sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis). The sample was collected from squaw-weed leaves in Washington-on-the-Brazos, Texas.

**Key Features:**

* **Fungal Tissue:** The image shows fungal tissue with distinct characteristics.
* **Coloration:** The tissue appears to be stained using Melzer's reagent, which is a common method for highlighting the cell walls of fungi.
* **Cell Walls:** The stained cell walls are visible as dark brown or black lines surrounding individual cells.
* **Cell Structure:** Some cells appear to have multiple nuclei (karyosomes) and a large central vacuole.

**Conclusion:**

The image provides a detailed view of the cellular structure of Pustula tragopogonis, including its fungal tissue, cell walls, and cell structure. The use of Melzer's reagent highlights the unique characteristics of this fungus, which can be useful for identification purposes. – AI vision