Tag » Swiss needle cast

High Beams
January 24, 2014

High Beams

Electron microscopes light up the world of the small

For a place that takes pictures with what amounts to controlled bursts of lightning, the lab is quiet, almost hushed. Standing in the entrance to Oregon State University’s Electron Microscopy Facility (EMF), you might hear researchers’ soft voices as they discuss the best way to see pollen on a bee’s tongue or to look at […]


Through the Needle
January 23, 2014

Through the Needle

Disease reduces Douglas-fir growth, costs more than $200 million annually

On the surface of a Douglas-fir needle, the spore of a fungal pathogen, Phaeocryptopus gaeumannii, germinates and sends forth threads (hyphae). It matures into an organism that will grow inside the needle and reproduce. By interfering with the tree’s ability to exchange air and water, it shuts down photosynthesis. Thus starts a disease known as […]