Metabolic control of transcriptional-translational control loops (TTCL) by circadian oscillations in the redox- and phosphorylation state of cells

Albrechtová, Jolana T. P.; Vervliet-Scheebaum, Marco; Normann, Johannes; Veit, Justyna; Wagner, Edgar

doi:10.1080/09291010600804692

Cited by 6 publications

(2 citation statements)

References 49 publications

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“…This indicates that the timing of the onset of N 2 fixation is apparently well conserved and obeys a tight connection to the 24-h biological clock. Energy-transducing systems, such as photosynthesis, glycolysis, respiration, and nitrogen fixation, generate cycles of redox and phosphorylation potentials that both modulate metabolic activities and affect gene transcription, via transcriptional/translational control loops (Stock et al, 2000;Albrechtov a et al, 2006). The assembly of the machinery for nitrogen fixation also responds to this control (Chen et al, 1998), and this may be the reason why, in the 8L : 16D culture, N 2 fixation was postponed to the second half of the night.…”

Section: Discussion N 2 Fixation Dynamicsmentioning

confidence: 99%

Nitrogen fixation and respiratory electron transport in the cyanobacteriumCyanotheceunder different light/dark cycles

Rabouille

Waal

Matthijs

et al. 2013

FEMS Microbiol Ecol

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Incompatibility of nitrogen fixation and oxygen production compels unicellular diazotrophic cyanobacteria to perform photosynthesis during daytime and restrict nitrogen fixation to nighttime. The marine diazotroph Cyanothece BG 043511 was grown in continuous culture under three light/dark regimes (16L : 8D, 12L : 12D, and 8L : 16D h); we monitored nitrogen fixation and potential photosynthetic efficiency simultaneously online to reveal how their temporal separation is affected by different LD regimes. An increase in nitrogen fixation rate at night coincided with a rise in pulse-amplitude modulated fluorescence, indicating that the enhanced respiratory electron transport to fuel diazotrophy affects the oxidation state of the plastoquinone pool. This may offer an alternative approach to assess instantaneous nitrogen fixation activity. Regardless of photoperiod, the maximum rate of nitrogen fixation was conserved at about 20 h after the onset of the light. Consequently, nitrogen fixation rates peaked at different moments in the dark: relatively early in the 16L : 8D cycle, at midnight in 12L : 12D, and relatively late in 8L : 16D. Under 16L : 8D, nitrogen fixation extended into the light, demonstrating the functional plasticity of nitrogen fixation in Cyanothece. Highest daily amounts of nitrogen fixed were obtained in 12L : 12D, which is consistent with the natural LD cycle of subtropical latitudes in which Cyanothece thrives.

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Section: Discussion N 2 Fixation Dynamicsmentioning

confidence: 99%

Nitrogen fixation and respiratory electron transport in the cyanobacteriumCyanotheceunder different light/dark cycles

Rabouille

Waal

Matthijs

et al. 2013

FEMS Microbiol Ecol

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“…The plant metabolism is regulated by photosynthesis and redox signals synchronized by the daily light-to-dark and other environmental cycles. Redox control, in addition to specific photoreceptors like phytochromes and cryptochromes, integrates rhythmic gene expression in chloroplasts, mitochondria, and the nucleus (Albrechtová et al, 2006). The interruption of the daily rhythm of the light-to-dark cycle might change or reset circadian rhythms in plants influencing photosynthesis (Dodd et al, 2005), but in this study of the canopy photosynthesis, we were not able to detect any disadvantage, e.g., less A/CLA or growth in the T23-04 with light interrupting the night.…”

Section: Discussionmentioning

confidence: 99%

Canopy Photosynthesis and Time-of-day Application of Supplemental Light

Markvart¹,

Rosenqvist²,

Sørensen³

et al. 2009

horts

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There is increasing use of electricity for supplemental lighting in the northern European greenhouse industry. One reason for this may be to secure a high growth rate during low-light periods by an attempt to increase net photosynthesis. We wanted to clarify which period of the day resulted in the best use of a 5-h supplemental light period for photosynthesis and growth. The periods tested were supplemental light during the night, day, morning, and evening. The experiments were carried out in daylight climate chambers measuring canopy gas exchange. The air temperature was 25 °C and the CO2 level ≈900 ppm. Vegetative chrysanthemum was used, because this species responds quickly to change in light level. The leaf areas of the plant canopies were nondestructively measured each week during the 4-week experimental period. The fact that the quantum yield of photosynthesis is greater at low than at high light intensities favors the use of supplemental light during the dark period, but growth measured as dry weight of the treated plants at the end of the experiments was not significantly different given identical light integrals of the treatments. However, one experiment indicated that increased time with dark hours during day and night (24 h) might decrease net photosynthesis. The assimilation per unit leaf area was approximately the same during times of sunlight through a diffusing screen at 100 μmol·m−2·s−1 of photosynthetic photon flux (PPF) as during times of supplemental (direct) light application at PPF of 200 μmol·m−2·s−1 by high-pressure sodium lamps. We conclude that during the winter and periods of low light intensities, the daily carbon gain does not depend on the time of supplemental light application, but is linked to the total light integral. However, extended time with dark hours during day and night (24 h) might be a disadvantage because of longer periods with dark respiration and subsequent loss of carbon. Our results indicate that during times of low light conditions, it is not necessary to include factors such as the timing of supplemental lighting application to achieve higher net photosynthesis in climate control strategies.

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Rhythmic Stem Extension Growth and Leaf Movements as Markers of Plant Behavior: How Endogenous and Environmental Signals Modulate the Root–Shoot Continuum

et al. 2015

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Metabolic control of transcriptional-translational control loops (TTCL) by circadian oscillations in the redox- and phosphorylation state of cells

Cited by 6 publications

References 49 publications

Nitrogen fixation and respiratory electron transport in the cyanobacteriumCyanotheceunder different light/dark cycles

Nitrogen fixation and respiratory electron transport in the cyanobacteriumCyanotheceunder different light/dark cycles

Canopy Photosynthesis and Time-of-day Application of Supplemental Light

Rhythmic Stem Extension Growth and Leaf Movements as Markers of Plant Behavior: How Endogenous and Environmental Signals Modulate the Root–Shoot Continuum

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