Abstract
All life depends on light. This implies that organisms are capable of sensing light throughout the whole spectrum of the sunlight. For molecular reasons photoreception over the whole visible spectrum cannot be accomplished by a single photoreceptor molecule. On a spectral basis most responses can be confined solely or in concert to the red, blue or UV region. The UV region of the spectrum is subdivided into UV-C (below 280 nm), UV-B (280–320 nm) and UV-A (320–400 nm) (Fig. 2). The term ‘near UV commonly describes the UV above 300 nm. The present chapter outlines the diversity of blue light (B) effects. Since photoreception of some physiological reactions of plants and fungi extends into the UV-region, occasionally the term ‘B/UV receptors’ is used.
Keywords
Nitrate Reductase Action Spectrum Anthocyanin Biosynthesis Neurospora Crassa Fluence RatePreview
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