When lettuce embryos with their endosperm of two cell layers were germinated in a solution containing [3H]‐leucine, very little was taken up and its incorporation into protein occurred mainly in the endosperm. Uptake and incorporation were higher in isolated endosperms and isolated embryos and more label was found in the embryo than in the endosperm. Germination‐inducing irradiation did not affect the amount or the distribution of the label in the endosperm and the embryo. The results show the existence of a permeability barrier on the outside of the endosperms, and indicate that in experiments with intact seeds the distribution of the incorporated leucine cannot be taken as a measure of the specific synthetic activity of the embryo and the endosperm.
|Number of pages||5|
|State||Published - 1 Jan 1971|
ASJC Scopus subject areas
- Plant Science