Abstract
The three psbA genes encoding the photosystem II D1 protein in Synechococcus sp. strain PCC 7942 respond differentially to an increase in intensity of white light through transcriptional induction of psbAII and psbAIII and accelerated degradation of psbAI and psbAIII messages. We report that the genes exhibit a novel photoreversible response involving blue and red light that is almost indistinguishable from the high-white light response. Transfer of cells from white to low-fluence blue light caused a decrease in the level of the psbAI message and increased levels of psbAII and psbAIII messages, whereas transfer to red or far-red light had little effect. Five min of blue light was sufficient to trigger psbAII and psbAIII induction; five min of subsequent red irradiation attenuated this response, whereas subsequent green or far-red light (or darkness) had no effect. Response to both high and blue light was insensitive to inhibitors of photosynthetic electron transport. We propose that Synechococcus modulates photosystem II biosynthesis in a variable light environment through a photoreception signal pathway, which is independent of photosystem II activity and which is distinct from red/green-reversible control of chromatically adapting cyanobacteria and the red/far-red-reversible phytochrome of plants.
| Original language | English |
|---|---|
| Pages (from-to) | 16143-16147 |
| Number of pages | 5 |
| Journal | Journal of Biological Chemistry |
| Volume | 269 |
| Issue number | 23 |
| State | Published - Jun 10 1994 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Biochemistry
Cite this
Blue and red light reversibly control psbA expression in the cyanobacterium Synechococcus sp. strain PCC 7942. / Tsinoremas, Nicholas; Schaefer, Michael R.; Golden, Susan S.
In: Journal of Biological Chemistry, Vol. 269, No. 23, 10.06.1994, p. 16143-16147.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Blue and red light reversibly control psbA expression in the cyanobacterium Synechococcus sp. strain PCC 7942
AU - Tsinoremas, Nicholas
AU - Schaefer, Michael R.
AU - Golden, Susan S.
PY - 1994/6/10
Y1 - 1994/6/10
N2 - The three psbA genes encoding the photosystem II D1 protein in Synechococcus sp. strain PCC 7942 respond differentially to an increase in intensity of white light through transcriptional induction of psbAII and psbAIII and accelerated degradation of psbAI and psbAIII messages. We report that the genes exhibit a novel photoreversible response involving blue and red light that is almost indistinguishable from the high-white light response. Transfer of cells from white to low-fluence blue light caused a decrease in the level of the psbAI message and increased levels of psbAII and psbAIII messages, whereas transfer to red or far-red light had little effect. Five min of blue light was sufficient to trigger psbAII and psbAIII induction; five min of subsequent red irradiation attenuated this response, whereas subsequent green or far-red light (or darkness) had no effect. Response to both high and blue light was insensitive to inhibitors of photosynthetic electron transport. We propose that Synechococcus modulates photosystem II biosynthesis in a variable light environment through a photoreception signal pathway, which is independent of photosystem II activity and which is distinct from red/green-reversible control of chromatically adapting cyanobacteria and the red/far-red-reversible phytochrome of plants.
AB - The three psbA genes encoding the photosystem II D1 protein in Synechococcus sp. strain PCC 7942 respond differentially to an increase in intensity of white light through transcriptional induction of psbAII and psbAIII and accelerated degradation of psbAI and psbAIII messages. We report that the genes exhibit a novel photoreversible response involving blue and red light that is almost indistinguishable from the high-white light response. Transfer of cells from white to low-fluence blue light caused a decrease in the level of the psbAI message and increased levels of psbAII and psbAIII messages, whereas transfer to red or far-red light had little effect. Five min of blue light was sufficient to trigger psbAII and psbAIII induction; five min of subsequent red irradiation attenuated this response, whereas subsequent green or far-red light (or darkness) had no effect. Response to both high and blue light was insensitive to inhibitors of photosynthetic electron transport. We propose that Synechococcus modulates photosystem II biosynthesis in a variable light environment through a photoreception signal pathway, which is independent of photosystem II activity and which is distinct from red/green-reversible control of chromatically adapting cyanobacteria and the red/far-red-reversible phytochrome of plants.
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UR - http://www.scopus.com/inward/citedby.url?scp=0028306473&partnerID=8YFLogxK
M3 - Article
C2 - 8206914
AN - SCOPUS:0028306473
VL - 269
SP - 16143
EP - 16147
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
SN - 0021-9258
IS - 23
ER -