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CAU1 regulates proline metabolism via P5CS1. (A, B) Proline levels in shoots. n=6 in (A), 3–6 in (B). (C, D) Transcript levels of P5CS1 in shoots as determined by RT-PCR. SAND (AT2G28390) was used as an internal control. Values are means ±SE, n=3. *P<0.05, **P<0.01, and ***P<0.001. Different letters above each bar indicate significant differences (ANOVA tests).
