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Figure 1. Model proposed for the function of YUCCA6 in drought stress. YUCCA6 protein is involved in auxin biosynthesis as a rate-limiting step converting IPA to IAA. It also functions in a drought stress signaling pathway through effects of ROS equilibrium in plants. Trp, tryptophan; TAA, tryptophan aminotransferase of Arabidopsis; IPA, indole-3-phyruvic acid; IAA, indole-3-acetic acid; ROS, reactive oxygen species.
