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(A) Effect of JA-Trp and JA-tryptamine on Arabidopsis root gravitropic response. Root deviation from the gravity vector was measured as described previously.13 Values are the means with SE (n = 24 to 30 seedlings). (B) Suppression of auxin-inhibited root growth by JA-Trp and dihydroJA-Trp (DHJA-Trp). Seedling root length was measure after 7 d growth on MS agar plates with 2 µM IAA plus the indicated amount of each conjugate. Values are the means (n = 21 roots) with SEs.
