Abstract
Rice coleoptile differentiated at ventral side of embryo and covered a shoot apex during 3 days to 5 days after anthesis. Then the epiblast and lateral scale initiated and surrounded the coleoptile. Simultaneously surface area of scutellum expanded, and the axis of plumule and radicle increased in diameter, and finally ventral scale differentiated as a scutellar appendix. During rice seed germination, lateral scale, epiblast, and coleorhiza grew and emerged from a rent of the seed coat. Then they had many hairs in the surface and the coleoptile appeared from the opened lateral scale. Seminal root pierced coleorhiza and emerged geotropically from surface of coleorhiza in touch with agar surface. Furthermore, a technical term of lateral scale is discussed.
