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. 2017 Dec 22;8:2182. doi: 10.3389/fpls.2017.02182

FIGURE 1.

FIGURE 1

The proline-tolerant phenotype of pre1-1 mutants. Growth of wild-type (Col) and pre1-1 seedlings (A,B) and average root length (C,D) on 0.5× MS medium supplemented with 45 mM L-proline (Pro) following 10 (A,C) or 16 (B,D) days of growth. (E) The proline contents of 12-day-old wild-type and pre1-1 seedlings treated with 45 mM proline in 0.5× MS liquid medium for various time periods. Experiments were repeated a minimum of three times with similar results. Data are means ± standard error (n = 6). Different letters above columns indicate significant difference (P < 0.05, Duncan’s multiple range test).