The distribution and turnover rate of soluble and insoluble caffeoyl esters in Xanthium

摘要: Abstract Chlorogenic acid labelled in the caffeoyl moiety from trans-(U-14C)cinnamic has a half-life of 9 hr young leaves, 24 mature 19 stem sections and 14 roots Xanthium. As label is lost chlorogenic acid, activity appears largely 3,5-dicaffeoylquinic insoluble residues. The rate gain or loss these fractions differs various tissues, but some generalities can be made. During 2 immediately following tracer application (applied for 1 hr) most In subsequent 20 period there slower though continued incorporation into this fraction leaves roots. during 2–22 after suggests first order reaction utilization. Most time. From consideration results others obtained by feeding quinic to Xanthium it that enzymes lignin synthesis may cell wall. enters primary wall passes through plasmalemma, many moieties arising de-esterification are utilized polymers, presumably lignin. remainder migrates cytoplasm where predominant conversion observed. Insoluble esters which occur Xanthium, especially very slowly appear play no part interrelations discussed.