Magical Mushrooms, Mischievous Molds

Panorama of the whitebark pine seedling at the Dorena Genetic Resource Center (USFS)

Did you know that whitebark pine is the highest elevation tree here in the Pacific Northwest? If you have driven the Rim Road of Crater Lake National Park, you may have noticed a huge gnarly tree lovingly known by few as the “Grandmother” whitebark pine. These trees withstand harsh winds and cold temperatures, giving them a krummholz or “crooked wood” appearance. Some grow nearly horizontal.

Zolton’s favorite whitebark pine at the rim of Crater Lake

As one of the few tree species that grow at high elevations, whitebark pine acts as an ecosystem foundation species, making it possible for other plants, fungi, and animals to utilize higher elevation environments. Growing together, a population of whitebark pines form ecological islands and promote biodiversity in subalpine areas. For example, the Clark’s Nutcracker and whitebark pine have been coevolving for eons. The Clark’s Nutcracker is the only bird that can break open the pine cones of whitebark pine. While the bird eats some of the seeds, it also cashes them and can disperse the seeds many miles away. Other species such as rodents and bears eat the seeds as well.

Much more research is needed to fully understand the ecological importance of whitebark pine in its characteristic ecosystem. However, recently whitebark pine research is focused on another interaction, that of whitebark pine with an invasive plant pathogen, white pine blister rust. Since the 1900s, this pathogen has dramatically reduced populations of whitebark pine and other 5-needle pines of North America. This means that whitebark pine populations and the biodiversity islands it forms at high elevations are in trouble.

Zolton with his experimental seedlings at Dorena.

Fortunately, some populations show natural resistance to the pathogen, and our guest, Zolton Bair from the department of Botany and Plant Pathology, is comparing the transcriptomes, the collection of genes expressed as RNA, of resistant and susceptible trees to understand tree defense against white pine blister rust. Be on the lookout for his dissertation defense this year!

As a teenager, Zolton loved collecting and identifying mushrooms. Through a class called magical mushrooms, mischievous molds he realized that fungi are very important to humans as food, medicine, and can be problematic for farmers. He became interested in plant pathology after conducting undergraduate research in a mycology lab that focused on the spread of fungal spores between agricultural fields.

Experimental plot: Keep off!

You do not want to miss this week’s episode of Inspiration Dissemination with our guest Zolton Bair. Tune into KBVR Corvallis 88.7 FM this Sunday January, 22 at 7 pm to hear about Zolton’s journey from barefoot mushroom hunting in Virginia to studying plant pathology here at Oregon State, and we promise you won’t be disappointed to learn more about the awesome tree story of whitebark pine.

Not a local listener? Follow this link to stream the show live.

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