Tissues and spores of rust fungus Coleosporium steviae(?) from Eupatorium serotinum collected in Lick Creek ParkLick Creek: Background Notes. College Station, Texas

🎞️ #3153-25

The image depicts a microscopic view of tissues and spores from the rust fungus Coleosporium steviae(?) on Eupatorium serotinum. The specimen was collected in Lick Creek Park, College Station, Texas, on May 15, 2022.

**Subject Matter**

* **Rust Fungus**: The image shows a rust fungus, specifically Coleosporium steviae(?), which is an unknown species of the genus Coleosporium. Rust fungi are plant pathogens that belong to the family Pucciniaceae and order Uredinales.
* **Eupatorium serotinum**: Eupatorium serotinum, also known as late Eupatorium or late boneset, is a perennial herb in the family Asteraceae. It is native to North America and is commonly found in fields, meadows, and along roadsides.

**Composition**

* **Tissues**: The image shows various types of tissues, including leaf tissue, stem tissue, and possibly fruiting structures such as spore-producing organs or sporangiophores.
* **Spores**: Several spores are visible throughout the image. They appear to be uredospores, which are a type of spore produced by rust fungi during the summer months.

**Coloration**

* The tissues and spores have different shades of brown coloration due to their varying ages and maturity levels.
* Younger tissues tend to be lighter in color, while older tissues appear darker brown or almost black.

**Background**

* The background of the image is a uniform light gray color, which helps to highlight the details of the tissues and spores. This suggests that the image was captured using a microscope with a phase contrast objective lens, which provides high-contrast images by adjusting the wave front of light entering the sample.

**Overall Conclusion**

The image provides a detailed view of the microscopic structure of Coleosporium steviae(?) infecting Eupatorium serotinum. The presence of various tissues and spores indicates that the fungus is actively colonizing the plant, causing disease symptoms such as yellowing or browning of leaves. Further study of this specimen could provide valuable insights into the ecology and evolution of rust fungi in North America. – AI vision

🇪🇸 Descripción en español / Spanish Description

Tejidos y esporas del hongo royo Coleosporium steviae(?) de Eupatorium serotinum recogido en Lick Creek Park, College Station, Texas, Mayo 15, 2022. La imagen muestra una vista microscópica de tejidos y esporas del hongo royo Coleosporium steviae(?) en Eupatorium serotinum. El espécimen se recogió en Lick Creek Park, College Station, Texas, el 15 de mayo de 2022. **Materia** * **Hongo Ryo**: La imagen muestra un hongo ryo, específicamente Coleosporium steviae(?), que es una especie desconocida del género Coleosporium. Los hongos ryo son patógenos de las plantas que pertenecen a la familia Pucciniaceae y el orden Uredinales. * **Eupatorium serotinum**: Eupatorium serotinum, también conocido como Eupatorio tardío o hierba de los huesos tardía, es una planta herbácea perenne en la familia Asteraceae. Es nativo de América del Norte y se encuentra comúnmente en campos, praderas y a lo largo de las orillas de caminos. **Composición** * **Tejidos**: La imagen muestra varios tipos de tejidos, incluyendo tejido foliar, tejido caulinar y posiblemente estructuras fructíferas como órganos productores de esporas o esporangióforos. * **Esporas**: Son visibles varias esporas en toda la imagen. Parecen ser uredosporas, que son un tipo de espora producida por hongos ryo durante los meses de verano. **Coloración** * Los tejidos y las esporas tienen diferentes tonalidades de color pardo debido a sus variaciones en edad y madurez. * Los tejidos más jóvenes tienden a ser de color más claro, mientras que los tejidos más viejos aparecen marrón oscuro o casi negro. **Fondo** * El fondo de la imagen es un uniforme color gris claro, lo cual ayuda a resaltar los detalles de los tejidos y las esporas. Esto sugiere que la imagen se capturó utilizando un microscopio con una lente objetivo en contraste de fase, que proporciona imágenes de alto contraste ajustando el frente de onda de la luz que entra en la muestra. **Conclusión general** La imagen proporciona una vista detallada de la estructura microscópica de Coleosporium steviae(?) infectando Eupatorium serotinum. La presencia de varios tejidos y esporas indica que el hongo está colonizando activamente la planta, causando síntomas de enfermedad como amarilleo o oscurecimiento de las hojas. El estudio adicional de este espécimen podría proporcionar insights valiosos sobre la ecología y evolución de los hongos ryo en América del Norte. – Spanish translation

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