Rapid Suppression of Growth by Blue Light 1: BIOPHYSICAL MECHANISM OF ACTION
AUTOR(ES)
Cosgrove, Daniel J.
RESUMO
The mechanism of the rapid inhibition of hypocotyl elongation by blue light was investigated in cucumber (Cucumis sativus L.) and sunflower (Helianthus annuus L.) seedlings by measuring the changes in turgor during the response. A special device, based on the resonance frequency principle, was built which permitted simultaneous and continuous measurements of both tissue rigidity (turgor) and growth rate on a single intact hypocotyl. The large decrease in growth rate following blue irradiation was consistently accompanied by a small increase in resonance frequency. This result indicates that blue light inhibits growth by decreasing the yielding properties of the cell walls, resulting in a slight rise in turgor because of the coupling between growth rate and turgor.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=426119Documentos Relacionados
- Rapid Suppression of Growth by Blue Light: OCCURRENCE, TIME COURSE, AND GENERAL CHARACTERISTICS 1
- Regulation of Pea Epicotyl Elongation by Blue Light 1: Fluence-Response Relationships and Growth Distribution
- Control of the Photosynthetic Apparatus of Acetabularia mediterranea by Blue Light 1: Analysis by Light-Saturation Curves
- Two Genetically Separable Phases of Growth Inhibition Induced by Blue Light in Arabidopsis Seedlings1
- Photosynthetic Apparatus of Pea Thylakoid Membranes 1: Response to Growth Light Intensity