Plant physiology (Bethesda), 2001-08, Vol.126 (4), p.1370-1380
2001
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- Overexpression of KNAT1 in Lettuce Shifts Leaf Determinate Growth to a Shoot-like Indeterminate Growth Associated with an Accumulation of Isopentenyl-Type Cytokinins
- Ist Teil von
- Plant physiology (Bethesda), 2001-08, Vol.126 (4), p.1370-1380
- Ort / Verlag
- Rockville, MD: American Society of Plant Biologists
- Erscheinungsjahr
- 2001
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Leaves are specialized organs characterized by defined developmental destiny and determinate growth. The overexpression of Knotted1-like homeobox genes in different species has been shown to alter leaf shape and development, but a definite role for this class of genes remains to be established. Transgenics that overexpress Knotted1-like genes present some traits that are characteristic of altered cytokinin physiology. Here we show that lettuce (Lactuca sativa) leaves that overexpress KNAT1, an Arabidopsis kn1-like gene, acquire characteristics of indeterminate growth typical of the shoot and that this cell fate change is associated with the accumulation of specific types of cytokinins. The possibility that the phenotypic effects of KNAT1 overexpression may arise primarily from the modulation of local ratios of different cytokinins is discussed.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0032-0889eISSN: 1532-2548DOI: 10.1104/pp.126.4.1370Titel-ID: cdi_proquest_miscellaneous_71086483
- Format
- –
- Schlagworte
- Agronomy. Soil science and plant productions, Arabidopsis Proteins, Biological and medical sciences, Chemical agents, Cytokinins, Cytokinins - genetics, Cytokinins - isolation & purification, Cytokinins - metabolism, Development and Hormone Action, Economic plant physiology, Fundamental and applied biological sciences. Psychology, Genes, Genes, Homeobox, Growth and development, Growth regulators, Homeobox genes, Homeodomain Proteins - biosynthesis, Homeodomain Proteins - genetics, Homeodomain Proteins - physiology, Immunohistochemistry, isopentenyl, KNAT1 gene, Lactuca - cytology, Lactuca - genetics, Lactuca - growth & development, Lactuca - physiology, Lactuca sativa, Leaves, Lettuce, Morphogenesis, Phenotype, Phenotypes, Plant Leaves - cytology, Plant Leaves - genetics, Plant Leaves - growth & development, Plant physiology and development, Plant Proteins - biosynthesis, Plant Proteins - genetics, Plant Proteins - physiology, Plant Stems - genetics, Plant Stems - growth & development, Plant veins, Plants, Plants, Genetically Modified, Plastocyanin, Transgenic plants, Vascular bundles, Vegetative apparatus, growth and morphogenesis. Senescence