抄録
1) The fine and coarse structures found in the living nuclei in the staminate hair and leaf hair cells of Tradescantia are mutually transformed by the aid of water or hypertonic solutions.
2) The transformation of the fine structure to the coarse one is also made by exposing the cells at high temperatures which cause the dehydration of the nucleus.
3) It is observed that in Tradescantia, the guard cell nuclei of stomata show the coarse structure when the stomata are in an open state and accordingly when the nuclei are in a dehydrated state, and the fine structure when the stomata are in a closed state and the nuclei are in a hydrated state.
4) Roughly speaking, the chromonemata in the nucleus of the fine structure assume the spiral and those in the nucleus of the coarse structure the twisted configuration.
5) The extremely thick nuclear threads in the erythrocyte nuclei in Triturus are observed both in the living and in the fixed state, and they are demonstrated by an artificial dissolution method to contain chromonemata within.
