抄録
The osmotic pressure and the chloride content in Metasequoia and some conifers were studied on the expressed cell saps. Cryoscopy and micro-titration were effectively employed for the quantitative determination using only small amount of the material.
The chloride content was remarkably higher in Metasequoia than in other conifers notwithstanding that the differences in total osmotic pressure and water content according to the species were only little. In the cell saps altogether so far tested, sodium was hardly detectable while potassium was found in abundance.
The chloride content seemed, as found in its diurnal variation, to play no important part for the shift of total osmotic pressure in the morning as the chloride content in cell saps almost remained at invariable level, somewhat tending to a decrease therein. Those common trends were most distinct in the cases of Metasequoia among the species investigated here.
