Abstract
Myelin figures, in general, are easily formed in the cells artificially, when they are treated by solutions of alkaline, heavy metals, tannin, etc. We have, however, observed them naturaly formed in the yellowed leaves of some crop plants. In wheat, they are about the same size and apparrently the similary structure as nucleus. But, in rice plant cells, they have protuberant or ring-like typical myelin form. Myelin formation is an important mark of pathological states of protoplasm. By the occurrence of the figure, therefore, we may be able to guess a definite physico-chemical state of crop plant cells, when they suffered injury by pilz, and other bad environments.
