Showing papers on "Photoinhibition published in 1976"

Similarity in dose responses, action spectra and red light responses between phototropism and photoinhibition of growth.

Abstract: — First positive phototropism and photoinhibition of growth of oat colcoptiles share similar dose response curves and action spectra. Both responses increase with increasing dosage of blue light (440 nm) up to 1013 photons cm-2, then both decrease with increasing dosage. Action spectra for both responses have peaks at 360, 440, and 470 nm. When red light (660 nm) was given beforehand, the sensitivity of each response to blue light was lessened. These data indicate a close correlation between phototropism and photoinhibition of growth. Both phenomena can be explained as a result of photoinhibition of basipetal transport of auxin.