トウモロコシの種子の発芽過程におけるチアミンりん酸塩の消長

概要

論文の詳細を見る
In order to clarify the correlation between the free B_1 and its ester, changes of content in embryonal axis, scutellum, and endosperm of maize seed were investigated. In an endosperm, the amount of total B_1 continues to increase in the course of germination ; especially, the rate of increase being remarkable at an early stage, at which the esterification of B_1 also occurs to a remarkable extent. Such an increase of total B_1 may be due to an influx of B_1 from the scutellum. It is surmised that quantitative and qualitative changes of B_1 in endosperm are favorable for the digestion of reserve materials in this organ. In embryonal axis, the content of total B_1 increases in parallel with the growth of axis. The reversion of relative amounts of free B_1 and its ester occurs at an later stage than in the case of the endosperm. In scutellum, the esterification of B_1 gradually proceeds, and the relative amounts of free B_1 and its ester is upset at the stage of 2〜3 cm radicle length. The total B_1 continues to decrease remarkably during germination. This is probably due to the outflow of B_1 onto the endosperm and embryonal axis. From these facts, it is inferred that the scutellum behaves as a reservoir of B_1. TTP begins to occur at the stage of imbibition, whereas TDP at a later stage. It may be that TTP takes an essential part in some metabolic system at an earlier stage of germination.
日本ビタミン学会の論文
1973-07-25