Heidemarie, Oelze and Hans, Mohr (1982) Phytochrorne Action on Chlorophyll Synthesis-A Study of the Escape from Photo reversibility. Plant Physiol., 70 (3). pp. 863-866.
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Abstract
A brief red light pretreatment (pulse), operating through phytochrome, stimulates the synthesis of chlorophyll a and b in Sorghum vulgare shoots that are placed in continuous saturating white light. The red light effect is fully reversible by a far-red (756 nanometers) light pulse for 45 minutes. Thereafter, escape from reversibility is fast, being completed within 2 hours. It is shown here that physiologically active phytochrome (Pfr) is required continuously during these first 45 minutes if the onset of the loss of photoreversibility is to begin 45 minutes after the red light treatment. Thus, the initial action of Pfr consists of two distinct processes: the first process is to overcome the lag prior to escape from photoreversibility; the second process is the actual stimulation of chlorophyll synthesis by Pfr. The duration of the lag prior to escape from photoreversibility depends on the level of Pfr established by the light pulse. The duration increases with increasing Pfr levels from nondetectable to 45 minutes. Above approximately 15% Pfr (Pfr/Plot ≈ 0.15), the duration of the lag prior to escape from photoreversibility remains constant at 45 minutes
| Item Type: | Article |
|---|---|
| Author Affiliation: | Biological Institute II, University of Freiburg, Schänzlestr. 1, D-78 Freiburg, West-Germany 1Dedicated to the memory of Dr. Sterling Hendricks. 2Supported by the Deutsche Forschungsgemeinschaft (SFB 46). |
| Subjects: | Atmosperic Science > Climatology Statistics and Experimentation > Experimentation Crop Improvement > Seed Technology |
| Divisions: | Sorghum |
| Depositing User: | Library ICRISAT-InfoSAT |
| Date Deposited: | 01 Apr 2012 10:39 |
| Last Modified: | 01 Apr 2012 10:39 |
| Official URL: | http://dx.doi.org/10.1104/pp.70.3.863 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/4386 |
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