Chapter 5The Sample and its Role in Laboratory Photography
This photograph of Arabidopsis thaliana shares the blue light sensitivity of two plants (×2.6 approximate magnification). This image, made in 1993, demonstrates the results of an experiment proving the existence of blue light photoreceptors in thale cress seedlings. There is a normal inhibition response to growth when the photoreceptor detects blue light conditions. The control seedling (right) exhibits stunted growth, indicating the presence of the receptor. The experimental genome (left) had the receptor removed, and the plant does not recognize the presence of the specific ...
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