Abstract
In this study, the author shows frequency and mode of emergence of extra strand, and relation between extra strand and stomata in coleoptile of rye crop plant as follows. 1. Frequency of occurrence of individuals having extra strand in coleoptile is 5.1%. 2. In rye, the order of emrgence of extra strand may be at random, but in rice it may be regular. 3. Row-number and shape of stomata belonging to extra strand are different in several respects from those belonging to common strand.
