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Effects of Latrunculin B on Root Tropistic Responses.
Latrunculin B (Lat B; 1 μM) was applied during root gravitropic responses (as described for Figure 4A) to the seedlings of wild-type, PIN2-EGFP, and 35S-ROP2 plants. The curvatures were calculated at 2, 4, 6, and 8 h after the horizontal reorientation. n > 20. Error bars indicate sd. Double asterisks indicate significant differences (P < 0.01) determined by the one-tailed Student's t test.
