0 votes 0 votes The plant hormone indole-$3$-acetic acid is derived from histidine tyrosine tryptophan proline Others gate2017 + – Milicevic3306 asked Mar 26, 2018 • edited Dec 6, 2020 by go_editor Milicevic3306 7.9k points answer comment Share Follow See all 0 reply Please log in or register to add a comment.