THE ROLE OF THE ENDOSPERM IN UPTAKE AND DISTRIBUTION OF EXOGENOUS LEUCINE IN GERMINATING LETTUCE SEEDS

S. KLEIN, M. NEGBI, A. WITZTUM, LIORA ROTHBERG

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)143-147
Number of pages5
JournalNew Phytologist
Volume70
Issue number1
DOIs
StatePublished - 1 Jan 1971
Externally publishedYes

ASJC Scopus subject areas

  • Physiology
  • Plant Science

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