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Schematic Representation of TAA1-Regulated Local Auxin Biosynthesis in the TZ Mediating Root Growth Inhibition in Response to Al Stress.
Al stress induces TAA1 local upregulation (shown by TAA1:GFP) in the TZ through an ethylene-dependent pathway, thus inducing local auxin accumulation and an auxin signaling maximum in the TZ (shown by DR5rev:GFP) and inhibition of root growth.
