禾殻類のColeorhizaに関する研究 : IV. 発芽期に於けるその性状

抄録

Experiments were performed to investigate the nature of coleorhiza of seeds and following results were obtained. 1) The part of embryo that appears first out of seed at the germination differs with the kind of plants. However, in husked grain coleorhiza breaks seed coat first in all cases at the germination. 2) The coleorhiza tissue was consisted of parenchyma cells and contained no vascular bandle. The boundary between coleorhiza and scutellum, or epiblast became distinct at the germination. 3) The growth of the 1st., the 2nd and the 3rd seminal roots of seedlings with coleorhiza removed was inferior to that of untreated ones. 4) The depression of freezing point of coleorhiza tissue of white dent corn was similar with that of seminal root tissue. The pretty high osmotic pressure in the coleorhiza seems to serve the active suction of water by the tissue. 5) P³² painted on the coleorhiza was translocated into various parts of wheat seedling in 24 hours after treatment. Results were shown in Table 3 and autoradiography was shown in Fig 4. By these results, P³² painted on coleorhiza was shown to be translocated to plimule and radicle.