Effect of NaCl on root growth in ice plants.

<p>(A-D) Five-day-old ice plant seedlings grown on the MS medium prior to NaCl treatment. (E-H) five-day-old ice plant seedlings after 24 h on MS containing 0 mM NaCl (E), 140 mM NaCl (F), 250 mM NaCl (G), or 500 mM NaCl (H). Bar = 1 cm. (I) Root length in five-day-old ice plant and <i>Arabidopsis thaliana</i> Col-0 ecotype seedlings (white boxes and white boxes with diagonal lines) and that of the same roots after 24 h on plates containing 140 mM NaCl (gray boxes and gray boxes with diagonal lines). Mean ± standard deviation (SD) (n = 15): *<i>p</i><0.001, as determined by a Student’s <i>t</i>-test. (J) Root length in five-day-old ice plants (white boxes) and that of the same roots after 24 h on the indicated concentration of NaCl (gray boxes). Mean ± standard deviation (SD) (n = 15): *<i>p</i><0.001, as determined by a Student’s <i>t</i>-test. (K-N) Morphological changes in root hairs on roots of ice plant seedlings treated with 0 mM (K), 140 mM (L), 250 mM (M) or 500 mM NaCl (N) for 24 h. Bar = 1 mm.