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Effect of chilling stress on chlorophyll fluorescence parameters of rice seedlings. The chlorophyll fluorescence images (A) and chlorophyll fluorescence parameters (Fv/Fm, NPQ, F0, Fm) (B) after 48 h of greening. Six day old etiolated seedlings were treated with 18 °C or 12 °C chilling stress. Values are means ± SD from three independent biological replicates. Different letters indicate significant differences according to Duncan’s multiple range tests (p < 0.05).
