Über die Bedeutung von 3.5.7.4′-Tetrahydroxyflavanon (Dihydrokaempferol) für die Biosynthese von Isoflavonen

Open Access
Publisher Website
Google Scholar
Abstract
In parallel experiments tritiated 3,5,7,4[image]-tetrahydroxyflavonone [T] (dihydrokaempferol) [T] (I) or 3,5,7,4[image]-tetrahydroxyflavone [T] (kaempferol IT]) (II) with or without simultaneous addition of DL-phenylalanine-[1-Cl4] was fed to chana seedlings (Cicer arietinum) and the C14 and tritium incorporation into the isoflavones biochanin A and formononetin was determined. A competition experiment between I and phenylalanine-[1 -Cl4] was also carried out. The incorporation of I and II into the isoflavones is insignificant and unspecific. Therefore, dihydrokaempferol is not a precursor for the biosynthesis of biochanin A in the chana seedlings. The aryl migration leading to isoflavones occurs at the flavanone stage was postulated from earlier work.