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Knockdown of PSP via dsPSP injection treatments (A) reduced PSP enzyme activity (B) and the expression level between dsGFP-treated controls and dsPSP. The histogram bars show mean values (n = 3), and the error bars indicate means ± SEM. Histogram bars annotated with different lowercase letters are significantly different at p < 0.05 (Student’s t-test); DAE is days after emergence.
