To evaluate chronological trend in damage of salinity on coastal forest species, we monitored transition of damages in Machilus thunbergii, Pinus densiflora and P. thunbergii saplings for three months after see water immersion for 24 hours. The damage was evaluated from discolored-leaves rate by visual observation, and physiological observation using sap flow and chlorophyll fluorescence. Salinity damage appeared dramatically in M. thunbergii, saplings were discolored 1 days later and died 18 days later. P. densiflira saplings were partly discolored within 18 days and most leaves were discolored 38 days later. P. thunbergii, on the other hand, more than 60% of leaves were undamaged at the end of experiments. Physiological parameters indicated damages prior to visual observation in all species. P. thunbergii showed trend of recovery in sap flow and chlorophyll Fluorescence, however, it was not observed visually.
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