20. シロイヌナズナのカルスに含まれる内生ブラシノステロイド

概要

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We analyzed the endogenous brassinosteroids (BRs) in the callus derived from root of Arabidopsis thaliana to examine whether BRs are involved in the cell division of plant callus. From the callus, 6-deoxocastasterone, 6-deoxotyphasterol, and 6-deoxo-3-dehydroteasterone, 6-deoxoteasterone, and 6-deoxocathasterone were identified by GC-SIM. These BRs are biosynthetic intermediates deemed biologically inactive. The fact that the callus did not produce castasterone (CS), which is contained in Arabidopsis seedling and thought to be biologically active, indicates that BRs are not required for callus growth. Conversely, it seems that differentiation requires the synthesis of CS. The absence of CS in the callus also suggests that C-6 oxidase is not working in callus.
植物化学調節学会の論文
2003-10-10