Red-Far Red Reversible Effect on Polysome Formation in the Embryos of Pinus thunbergii Seeds
AUTOR(ES)
Yamamoto, Naoki
RESUMO
Polysome formation in the embryos of Pinus thunbergii seeds was studied. Free ribosomes were dissociated to smaller subunits in a high salt buffer, but the complex ribosomes were not. The free ribosomes could be distinguished from monomer ribosomes derived from polysomes after RNase treatment. The monomer ribosomes present in the embryos of the dark-imbibed seeds were predominantly free ribosomes; very small quantities of polysomes could be detected in the embryos from dark-imbibed seeds. Such polysomes remained at a very low level during dark imbibition at least for a month. The level of polysomes increased 4 hours after a brief exposure to red light. The effect of red light on polysome formation was partially reversed when followed by far red light irradiation.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=541913Documentos Relacionados
- A Red-Far Red Reversible Effect on Uptake of Exogenous Indoleacetic Acid in Etiolated Rice Coleoptiles 1
- Phytochrome Action in Oryza sativa L: IV. Red and Far Red Reversible Effect on the Production of Ethylene in Excised Coleoptiles 1
- Polysome Formation in Light-sensitive Common Purslane Seeds
- The Effect of Red and Far Red Light on the Desaturation of Fatty Acids in Barley Leaves 1
- Two Effects of Prolonged Far Red Light on the Response of Lettuce Seeds to Exogenous Gibberellin 1