Abstract
Lettuce (Lactuca sativa) seeds var. Grand Rapids could be maintained many weeks in the dark without germination. Following illumination with white light, a gradual increase in polyribosome population up to the time of germination was demonstrated by sucrose gradient centrifugation. Polysomes could not be detected in imbibed seeds maintained continuously in the dark. Thus, polysome formation and therefore the capacity for a high rate of protein synthesis required for germination and growth, is not associated with the process of imbibition, but is dependent upon the seeds having received the dormancy-breaking stimulus of illumination.
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- Barker G. R., Rieber M. The development of polysomes in the seed of Pisum arvense. Biochem J. 1967 Dec;105(3):1195–1202. doi: 10.1042/bj1051195. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Efron D., Evenari M., De Groot N. Amino acid incorporation activity of lettuce seed ribosomes during germination. Life Sci II. 1971 Sep 8;10(17):1015–1019. doi: 10.1016/0024-3205(71)90105-6. [DOI] [PubMed] [Google Scholar]
- MARCUS A., FEELEY J. PROTEIN SYNTHESIS IN IMBIBED SEEDS. II. POLYSOME FORMATION DURING IMBIBITION. J Biol Chem. 1965 Apr;240:1675–1680. [PubMed] [Google Scholar]
- Marcus A., Feeley J. ACTIVATION OF PROTEIN SYNTHESIS IN THE IMBIBITION PHASE OF SEED GERMINATION. Proc Natl Acad Sci U S A. 1964 Jun;51(6):1075–1079. doi: 10.1073/pnas.51.6.1075. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Waters L. C., Dure L. S., 3rd Ribonucleic acid synthesis in germinating cotton seeds. J Mol Biol. 1966 Aug;19(1):1–27. doi: 10.1016/s0022-2836(66)80046-3. [DOI] [PubMed] [Google Scholar]