Study of the Effect of Calcium Ion in dark-induced senescence leaves of peony

The effect of calcium ion on peony aging was studied.Different four calcium ion concentrations (0mmol/L,100mmol/L,250mmol/L, 500mmol/L) was setted.Leaf of the peony Roufurong on same growth period was cultured in vitro, Chlorophyll concentration was measured per four days.The results revealed that calcium ion concentrations at 100mmol/L gave the slowest aging speed among four samples, and when calcium ion concentrations was 500mmol/L, peony was aging fastest.