Fig. 6.

PCA22 expression in Arabidopsis plants grown under abiotic stress conditions. (A–D) qPCR analyses showing the expression of PCA22, RAB18, and RD29A in response to abiotic stress conditions. All quantifications were made in three independent RNA samples obtained from plants treated with 400 mM mannitol (A), 10% PEG (B), drought (C), and 100 μM ABA (D) for the indicated times. Error bars indicate the SD of three independent biological samples. Differences among the expression of PCA22, RAB18, or RD29A in Arabidopsis seedlings with and without treatment with various abiotic stresses are significant at 0.05>P>0.01 (*) or P<0.01 (**).