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Freezing phenotypes (a), survival rates (after 23 d on soil), water-soaked area (after 17 d on soil) and ion leakage (after 16 d on soil) (b) of C24, Col and Cvi-0 Arabidopsis seedlings. In (b), data are means of three independent experiments ± SD. Asterisks indicate significant differences compared with the non-inoculated plants (*P < .05, **P < .01, t-test). Black (white) bars: P. indica-(un-)colonized plants.
