Dear Editor, The ultraviolet (UV)-B wavelength (280-315 nm) is an indispensable component of the sunlight that reaches the earth's surface.Longwavelength and Iow-fluence UV-B specifically induces plant photomorphogenesis,which is characterized by inhibition of hypocotyl elongation,promotion of anthocyanin accumulation,and eventually tolerance against UV-B stress (Jenkins,2009).
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