Phytochrome A overexpression in transgenic tobacco. Correlation of dwarf phenotype with high concentrations of phytochrome in vascular tissue and attenuated gibberellin levels.

Abstract excerpt

Phytochromes are a family of related chromoproteins that regulate photomorphogenesis in plants. Ectopic overexpression of the phytochrome A in several plant species has pleiotropic effects, including substantial dwarfing, increased pigmentation, and delayed leaf senescence. We show here that the dwarf response is related to a reduction in active gibberellins (GAs) in tobacco (Nicotiana tabacum) overexpressing oat...

Topics

• Arabidopsis Proteins
• Base Sequence
• Caulimovirus
• Gibberellins
• Molecular Sequence Data
• Phenotype
• Phytochrome
• Phytochrome A
• Plants, Genetically Modified
• Plants, Toxic