抄録
1. Plastid characters in Hosta japonica ASHERS. et GRAEBN. f. albomarginata MAKINO and 9 different kinds of progenies were investigated. The parent albomarginata plant had three different kinds of plastids, namely colorless, yellow and green plastids. Some of the progenies received only one kind of plastid, while others more than one.
2. The plastid characters show non-Mendelian inheritance in the seedlings from selfed plants.
3. By the crossing experiments the maternal inheritance of the character in question was determined.
4. Unlike the case of Funkia ovato (an allied species) studied by STRASBURGER, embryo formation is normal, no apogamy being found. From these facts and the results of crossing experiments with regard to purple spots at the leaf base, the writer concluded that the maternal inneritance of plastid character is gametic.
5. Especially in the border line between two differently pigmented tissues of mature leaves, two or more different kinds of plastids in one and the same cell were observed in all variegated plants.
6. The plastids of male parent may or may not be transmitted into the egg cell. If the former be the actual case, the development of such plastids derived from male side must be considered as being prevented from further development in the egg cytoplasm, and the present case of maternal inheritance is due to the inhibitory action of egg cytoplasm, but the various deficient chloroplast characters developed in the progenies are due to the individual characters of plastids themselves and to their irregular distributions into the daughter cells which may happen during the process of the cell division.
7. The writer considers that the variegated plants here concerned originate from a fertilized egg cell which had two or more different kinds of plastids transmitted from the embryosac mother cell.
8. There were observed between the neighbouring cells no influence of one kind of plastid upon another, concerning the formation of chlorophyll pigments characteristic to each kind of plastid.
In concluding the writer wishes to express her sincere thanks to Prof. K. Fujii for his kindly reading through the manuscript.
