I realize this is not a biology forum. Check out the attachment. As expected, plants can use some low wavelength ultraviolet light for photosynthesis. However, the photosynthetic process seems to go nuts when x-rays are used. This is the first time I've ever heard of this. Even gamma rays seem to produce good results. Is this some sort of survival mechanism for a post-apocalyptic nuclear wasteland? :p Or more likely, a throwback to a time when the earth had a thinner atmosphere? (might be way off here). Would the lower wavelengths cause mutagenic effects? Seeing as how wavelengths around 650nm seem to contribute to a rate of photosynthesis comparable to 350nm-450nm range, producing these high frequency waves would obviously be impractical and wasteful when there's plenty of good radio and microwave spectrum radiation lying around. :p Has anyone read any studies about this?