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Effect of white light on the elongation of mesocotyl segments incubated for 24 hrs in the presence 10 mM KCl and 1 mM CaCl2. The segments were excised from etiolated 5-d-old seedlings grown in vitro on the BM. Initial length of the segments was 10 mm. Data show increased in length (mean ± SE of 20 segments) from one representative experiment. Similar results were observed two independent experiments.
