Yukiyoshi Ogawa

Isolation of water-soluble gibberellins from immature seeds of Pharbitis nil

SummaryThe presence of three water-soluble gibberellins was confirmed in immature seeds of morning-glory (Pharbitis nil). The structure of the main component has been elucidated as 2-O-β-glucosyl-gibberellin A3. It shows marked growth-promoting activity on rice seedlings but is far less active on dwarf maize mutants d1, d2 and d5.

Synthesis and anticytokinin activity of 4-substituted-7-(β-d-ribofuranosyl)-pyrrolo[2,3-d]pyrimidines

Abstract A series of 4-substituted-7-(β- d -ribofuranosyl)-pyrrolo[2,3- d ]pyrimidines in which the 4-substituents were systematically varied has been syn

Anticytokinin activity of 4-furfurylamino-7-(β-D-ribofuranosyl) pyrrolo[2,3-d]pyrimidine

Abstract 4-Furfurylamino-7-(β-D-ribofuranosyl)pyrrolo[2,3-d]-pyrimidine, the 7-deaza analog of kinetin riboside, has been synthesized and found to be a potent anticytokinin in the tabacco callus bioassay.