Using a handheld device that looks a little like a ray gun, scientists recorded how plant leaves on different Alaskan mountains reflect light. And, it turns out, different populations of plants of the same species — for instance, plants living on neighboring mountaintops — reflect light differently, in ways that echo their genetic variation from each other.
Click here for original story, ‘Ray guns’ let scientists use light instead of DNA to tell plant populations apart
Source: ScienceDaily