In-vivo phytochrome control of in vitro transcription rates in isolated nuclei from oat seedlings
1Biologisches Institut der Universität II, Schänzlestrasse 1, D-7800, Freiburg, Federal Republic of Germany.
Abstract:
The transcription rate of isolated nuclei from oat seedlings was analysed by measuring the incorporation of radioactive label in trichloroacetic-acid-pelletable material. It was observed that this transcription rate depends on the light pretreatment of the plants: 7.5 h after a 5-min red or far-red light pulse maximum rates were found, but at this time far-red light induced only about half of the stimulation observed after a red light pulse. The far-red reversibility of the effect of the red light pulse indicates that phytochrome controls the capacity for transcription by isolated nuclei. Besides this slow reaction, phytochrome regulated the transcription rates in a very fast response when homogenates were irradiated.
More Related Videos
07:58Author Spotlight: Non-Invasive High-Resolution Measurement of Chlorophyll Synthesis During De-Etiolation
Published on: January 12, 2024
06:28Preparation of Intact Tissue for Microscopic Analysis of the Endosperm Cell Layer in Developing and Mature Arabidopsis Seeds
Published on: May 16, 2025
Related Concept Videos
Biological Clocks and Seasonal Responses
Transgenic Plants
The first-ever transgenic plant was a tobacco plant developed in 1983 that showed resistance against the tobacco mosaic virus. Since then, many transgenic plants have been developed and commercialized for improving the agricultural, ornamental, and horticultural value of a crop plant. Transgenic...
Cell Signaling in Plants
Gene Regulation During Sporulation
Photoreceptors and Plant Responses to Light
