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Initial petiole angles in a number of Arabidopsis ABA mutants (black bars) compared to the appropriate wild-type background accessions (white bars). Angles were measured immediately prior to ethylene treatment experiments (Figs. 3 and 4). Means of four to eight replicates with ses. Stars indicate P values: n.s, Not significant; *, 0.05 > P > 0.01; **, P < 0.01.
