Summary
Using carboxyl-14C-labelled IAA as a substrate, it could be demonstrated, that there is a linear relationship between cut surface and IAA destruction inHelianthus hypocotyl tissue. Unhurt tissue, however, destroys auxin also at an appreciable rate. Compared on a fresh weight basis, the epidermis of the hypocotyls oxydizes IAA about 18 times more than the tissue freed of the epidermis.
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Zenk, M.H., Müller, G. Über den Einfluss der Wundflächen auf die enzymatische Oxydation der Indol-3-essigsäure in vivo. Planta 61, 346–351 (1964). https://doi.org/10.1007/BF01895000
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DOI: https://doi.org/10.1007/BF01895000