2016. Cankered whitebark pine seedling with pycnial stage of infection. Whitebark pine restoration planting (and combination genetic test for blister rust resistance) at Crater Lake National Park in the Rim Village area, Oregon.

Cankered whitebark pine seedling with pycnial stage of infection. Whitebark pine restoration planting (and combination genetic test for blister rust resistance) at Crater Lake National Park in the Rim Village area, Oregon.

 

Note: The white pine blister rust pathogen is a typical heteroecious, macrocyclic rust that produces five distinct spore stages on two different hosts to complete its life cycle. The pycnial stage consists of pycniospores, or spermatia, which are haploid spores that fertilize compatible receptive hyphae.

For more see: www.apsnet.org/edcenter/intropp/lessons/fungi/basidiomyce...

 

 

Photo by: Richard Sniezko

Date: August 30, 2016

 

Credit: USDA Forest Service, Region 6, Umpqua National Forest, Dorena Genetic Resource Center.

Source: Richard Sniezko collection; Cottage Grove, Oregon.

 

For more about the Dorena Genetic Resource Center see: www.fs.usda.gov/detail/r6/landmanagement/resourcemanageme...

 

Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth

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