Induction and Regulation of Chloroplast Replication in Mature Tobacco Leaf Tissue 1
AUTOR(ES)
Boasson, Rosalinda
RESUMO
Chloroplast replication was induced in mature tobacco leaf tissue (Nicotiana tabacum L.) by culturing leaf discs on a sterile medium composed of salts and sucrose. Chloroplast replicaton is greatly enhanced by the addition of kinetin to this medium. Kinetin also enhances cell enlargement, but cell division does not occur. Chloroplast replication is nonsynchronous and proceeds most rapidly when the cell enlargement rate decreases. Chloroplast replication is light-dependent, but cell enlargement occurs in both light and dark. Chloroplast replication resumes when discs cultured in the dark are returned to the light. It appears that chloroplast replication is related to cell expansion. The possibility of inducing synchronous replication of chloroplasts in tobacco cells is discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=365907Documentos Relacionados
- Light Induction of Phosphoenolpyruvate Carboxylase in Etiolated Maize Leaf Tissue 1
- Photomorphogenic Regulation of Chloroplast Replication in Euglena: ENHANCED LOSS OF CHLOROPLAST DNA IN RED LIGHT 1
- Dehydration, Water Fluxes, and Permeability of Tobacco Leaf Tissue
- Distribution of Metabolites between Chloroplast and Cytoplasm during the Induction Phase of Photosynthesis in Leaf Protoplasts 1
- Developmental Regulation of Intercellular Protein Trafficking through Plasmodesmata in Tobacco Leaf Epidermis1