Asymmetric Distribution in the Biosynthesis of Cotton Cellulose-[U-14C]

Autoradiographs of mature cotton bolls which earlier had radioglucoseintroduced via a thin incision into their peduncles show a markedasymmetry in distribution of the label. Radio-assay shows thespecific activity of the cotton fibres on the treated side tobe as much as 30-fold that on the opposite side.