Tryptophan-dependent indoleacetic-acid biosynthesis from indole, demonstrated by double-labelling experiments
- 1 January 1971
- journal article
- Published by Springer Nature in Planta
- Vol. 97 (2) , 135-141
- https://doi.org/10.1007/bf00386761
Abstract
3H-serine+14C-indole were administered to tips of sterily-grown pea seedlings and of non-sterile oat coleoptiles. The Try and IAA produced were extracted and purified by paper chromatography, and their 3H/14C ratios were determined. The 3H/14C ratio of IAA was lower than the 3H/14C ratio of Try. However, the same decrease of the IAA 3H/14C ratio was found when 3H, 14C-Try was supplied instead of 3H-serine+14C-indole. This result supports the view that Try is the native IAA precursor and that no significant bypass from indole to IAA exists in the plant material used.Keywords
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