Abstract
The expression of the plastid photosynthetic psbK‐I‐D‐C gene cluster is closely regulated by light. The time courses of expression of the gene cluster in rice seedlings ( Oryza sativa L. cv. Tainong 67) grown under various irradiation regimes were examined by northern and western blot analyses. The data indicated that the gene cluster is photoregulated at the transcriptional and post transcriptional levels. Blue light not only enhanced the accumulation of the overlapping transcripts present in the 7 to 8‐day dark‐grown seedlings, but also induced the accumulation of new class d transcripts encoding D2 protein and CP43. This observation confirms the conservation of blue‐light regulation of psbD‐psbC transcription in plants. In etiolated seedlings, the accumulation of class e transcript encoding CP43 increased most remarkably during development: irradiation further enhanced the transcript level. Although the transcripts encoding D2 protein and CP43 are present in etiolated plants, only D2 protein is accumulated, and CP43 was not detected unless the seedlings were exposed to light. The transcript levels of RNAs d1 and f2 in green seedlings grown under a 12‐h photoperiod exhibited fluctuating patterns over the 24‐h period. The levels o1 RNAs dl and f2 also exhibited significant fluctuation during the 36‐h exposure of the etiolated seedlings to light. These data imply that the circadian regulation of pshD‐psbC expression takes place at the transcriptional and post‐transcriptional levels.
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Claims 10
Claim · model-written summary
The gene cluster was regulated by light at transcriptional and post transcriptional levels.
- Taxon
- rice
Oryza sativat0 - Gene
- psbK‐I‐D‐Ct0
- Outcome
- photoregulated at the transcriptional and post transcriptional levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the gene cluster is photoregulated at the transcriptional and post transcriptional levels”
t0“Regulation of plastid photosynthetic psbK‐I‐D‐C gene expression by light in rice plants”
Claim · model-written summary
Blue light enhanced accumulation of overlapping transcripts in dark-grown seedlings.
- Taxon
- riceOryza sativat0
- Treatment
- Blue lighte0
- Outcome
- accumulation of the overlapping transcriptse0
- Direction
- enhancede0
- Comparator
- dark‐grown seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Blue light not only enhanced the accumulation of the overlapping transcripts present in the 7 to 8‐day dark‐grown seedlings”
t0“rice plants”
Claim · model-written summary
Blue light induced new class d transcripts encoding D2 and CP43.
- Taxon
- riceOryza sativat0
- Treatment
- Blue lighte0
- Gene
- D2 protein and CP43e0
- Outcome
- accumulation of new class d transcriptse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Blue light not only enhanced the accumulation of the overlapping transcripts present in the 7 to 8‐day dark‐grown seedlings, but also induced the accumulation of new class d transcripts encoding D2 protein and CP43”
t0“rice plants”
Claim · model-written summary
Class e transcript encoding CP43 accumulated most strongly during etiolation development.
- Taxon
- riceOryza sativat0
- Gene
- CP43e0
- Outcome
- accumulation of class e transcripte0
- Direction
- increased most remarkablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In etiolated seedlings, the accumulation of class e transcript encoding CP43 increased most remarkably during development”
t0“rice plants”
Claim · model-written summary
Irradiation further enhanced class e transcript abundance.
- Taxon
- riceOryza sativat0
- Treatment
- irradiatione0
- Outcome
- transcript levele0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irradiation further enhanced the transcript level”
t0“rice plants”
Claim · model-written summary
D2 protein accumulated in etiolated plants.
- Taxon
- riceOryza sativat0
- Gene
- D2 proteine0
- Outcome
- D2 protein is accumulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only D2 protein is accumulated, and CP43 was not detected unless the seedlings were exposed to light”
t0“rice plants”
Claim · model-written summary
CP43 was undetected without light exposure.
- Taxon
- riceOryza sativat0
- Gene
- CP43e0
- Outcome
- CP43 was not detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CP43 was not detected unless the seedlings were exposed to light”
t0“rice plants”
Claim · model-written summary
RNA d1 and f2 transcript levels fluctuated across 24 hours in green seedlings.
- Taxon
- riceOryza sativat0
- Gene
- RNAs d1 and f2e0
- Outcome
- transcript levelse0
- Direction
- fluctuating patternse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transcript levels of RNAs d1 and f2 in green seedlings grown under a 12‐h photoperiod exhibited fluctuating patterns over the 24‐h period”
t0“rice plants”
Claim · model-written summary
RNA d1 and f2 levels fluctuated significantly during 36 hours of light exposure in etiolated seedlings.
- Taxon
- riceOryza sativat0
- Gene
- RNAs dl and f2e0
- Outcome
- levels o1 RNAs dl and f2e0
- Direction
- fluctuatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The levels o1 RNAs dl and f2 also exhibited significant fluctuation during the 36‐h exposure of the etiolated seedlings to light”
t0“rice plants”
Claim · model-written summary
The data imply circadian regulation of psbD-psbC at transcriptional and post-transcriptional levels.
- Taxon
- riceOryza sativat0
- Gene
- pshD‐psbCe0
- Outcome
- circadian regulatione0
- Qualifier
- transcriptional and post‐transcriptional levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These data imply that the circadian regulation of pshD‐psbC expression takes place at the transcriptional and post‐transcriptional levels”
t0“rice plants”
The same questions in other papers
light · molecular: expression · Oryza sativa (rice)Positive and negative results
19 papers in the same direction as this paper · 12 in the opposite direction
- positive
- no effect
- negative
28 papers more in this group
See all 32 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.