Regulation of plastid photosynthetic psbK-I-D-C gene expression by light in rice plants

Chen, Shu-Chen Grace; Wu, San‐Pin; Lo, Pang-Kuo; Mon, Dir-Pu; Chen, Long-Fang Oliver

doi:10.1034/j.1399-3054.1995.930406.x

Cited by 7 publications

(7 citation statements)

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“…The transcript level derived from the psbDBLRP is also under control of a circadian clock in several higher plants including rice (Chen et al, 1995), wheat (Nakahira et al, 1998), barley (Thum et al, 2001), and tobacco (Thum et al, 2001). These lines of evidence together with the fact that nucleotide sequences of the psbDBLRP are highly conserved in monocots and dicots and black pine (Christopher et al, 1992;Hoffer and Christopher, 1997) strongly suggest that the transcription activity of the psbDBLRP is commonly regulated by a circadian clock in chloroplasts in higher plants.…”

Section: Circadian-regulated Transcriptionmentioning

confidence: 97%

Plastid Transcription in Higher Plants

Toyoshima

Onda

Shiina

et al. 2005

Critical Reviews in Plant Sciences

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The plastid genome is transcribed by nucleus-encoded (NEP) and plastid encoded (PEP) RNA polymerases. NEP transcribes housekeeping genes as well as genes coding for PEP core subunits and its activity is replaced by PEP in chloroplasts resulting in differential expression of genes in a developmental context. PEP is a prokaryotic-type enzyme in which nuclear-encoded σ factors function as promoter recognition subunit. A phylogenetic analysis for σ factors identified so far in plants shows that plant σ factors are members of bacterial σ 70 family and divided into six groups, Sig1 through Sig6, which are integrated into four clusters consisting of Sig1 and Sig4, Sig2 and Sig3, Sig5 and Sig6. All plastid σ factors recognize bacterial σ 70 -type promoters, but they differ in promoter preference and the tissue-, developmental stageand environmental-dependent expression. Sig5 is distinct from the other σ factors in its structure, function, and expression in response to light and stress. A promoter of the psbD operon, psbD blue light responsive promoter (psbDBLRP) is a typical example that is under the control of a combination of various signals arising in the nucleus and plastids in response to the tissue specific and developmental stage-and environment-dependent cues. psbDBLRP is recognized only by Sig5, which is expressed by a cryptochrome-mediated blue light signal and signals responding to stress conditions. The activity of psbDBLRP is also under the control of circadian clock. Furthermore, it may be regulated by redox signals generated by photosynthetic electron transport in the chloroplast presumably through the change of the binding affinity of a nuclear encoded transcription factor for the enhancer element located upstream of the core promoter region of the psbD operon.

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Section: Circadian-regulated Transcriptionmentioning

confidence: 97%

Plastid Transcription in Higher Plants

Toyoshima

Onda

Shiina

et al. 2005

Critical Reviews in Plant Sciences

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“…For northern blotting, 10 mg of total RNA from each sample was electrophoresed on a 1% (w/v) agarose gel after denaturation with glyoxal and transferred to a nitrocellulose filter (Hybond-C extra; Amersham, Buckinghamshire, UK) as described by Chen et al (1995). The filter was then hybridized sequentially with 32 P-labeled cDNA fragments and specific gene probe for 25S rRNA.…”

Section: Rna Isolation and Northern Analysismentioning

confidence: 99%

Cloning and characterization of leaf senescence up‐regulated genes in sweet potato

Huang¹,

Yap

et al. 2001

Physiologia Plantarum

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Genes that are expressed during leaf senescence in sweet potato (Ipomoea batatas, cv. Tainong 57) were identified by the isolation of cDNA fragments with the mRNA differential display method. Eight senescence-associated cDNA clones for mRNAs differentially expressed during leaf senescence were obtained and characterized. Northern blot analysis indicated that all these clones represented genes that are up-regulated during natural leaf senescence. Among them, five cDNA clones have been obtained in full length by screening a senescing leaf cDNA library or by performing rapid amplification of cDNA ends. DNA and protein database searches revealed that clones SPA15 and SPC9 encode proteins of unknown function. The other six clones SPG31, SPC20, SPG27, SPC25, SPC15 and SPC1 showed significant sequence homology to known genes encoding a cysteine proteinase, isocitrate lyase, S-adenosylmethionine decarboxylase, cysteine proteinase inhibitor and metallothionein-like type I protein. The gene expression patterns represented by SPG31, SPG27 and SPA15 were found to be highly specific in senescing leaves. The corresponding transcripts for SPG31, SPG27 and SPA15 were below detectable levels in other organs such as flowers, stems, roots and tubers. The possible physiological roles of these gene products in the leaf senescence process are discussed.

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“…In rice seedlings some of the mRNA levels transcribed within the psbD/C operon have been reported to exhibit diurnal oscillations under a 12-h dark/12-h light cycle (Chen et al, 1995). When etiolated wheat seedlings were transferred to continuous light, the levels of some transcripts, which appeared to be derived from the psbD LRP, showed a fluctuation with an approximately 24-h periodicity for one cycle (Kawaguchi et al, 1992).…”

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Circadian-Regulated Transcription of thepsbD Light-Responsive Promoter in Wheat Chloroplasts

et al. 1998

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The level of mRNAs derived from the plastid-encoded psbD light-responsive promoter (LRP) is controlled by a circadian clock(s) in wheat (Triticum aestivum). The circadian oscillations in the psbD LRP mRNA level persisted for at least three cycles in continuous light and for one cycle in continuous dark, with maxima in subjective morning and minima in subjective early night. In vitro transcription in chloroplast extracts revealed that the circadian cycles in the psbD LRP mRNA level were dominantly attributed to the circadian-regulated transcription of the psbD LRP. The effects of various mutations introduced into the promoter region on the psbD LRP activity in vitro suggest the existence of two positive elements located between ؊54 and ؊36, which generally enhance the transcription activity, and an anomalous core promoter structure lacking the functional "؊35" element, which plays a crucial role in the circadian fluctuation and light dependency of psbD LRP transcription activity.

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Regulation of plastid photosynthetic psbK-I-D-C gene expression by light in rice plants

Cited by 7 publications

References 0 publications

Plastid Transcription in Higher Plants

Plastid Transcription in Higher Plants

Cloning and characterization of leaf senescence up‐regulated genes in sweet potato

Circadian-Regulated Transcription of thepsbD Light-Responsive Promoter in Wheat Chloroplasts

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