Ribulose bisphosphate carboxylase capacity and chlorophyll content in developing seedlings of Chenopodium rubrum L. growing under light of different qualities and fluence rates

Frosch, S.; Bergfeld, R.; Mehnert, Carola S.; Wagner, Edgar; Greppin, Hubert

doi:10.1007/bf00032921

Cited by 8 publications

(5 citation statements)

References 44 publications

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“…The effect of the fluence rate of white light observed here is consistent with previous results for the abundance and activity of ribulose 1,5bisphosphate carboxylase (Boardman 1977;Bj6rkman 1981 ;Anderson 1986) and for rbcS transcript levels (Jenkins 1986;Prioul and Reyss 1988). These results are also in agreement with previous studies which indicate that phytochrome photoequilibrium has little effect on ribulose 1,5-bisphosphate carboxylase activity in light-grown plants (Chow et al 1990), whereas at low fluences, blue fluence rate controls the amount of carboxy[ase activity (Frosch et al 1985;Drumm-Herrel and Mohr 1988). 1 and Table 1 indicate that phytochrome does not function as the fluence-rate detector for rbcS expression in light-grown primary leaves.…”

Section: Discussionsupporting

confidence: 93%

A blue-light photoreceptor mediates the fluence-rate-dependent expression of genes encoding the small subunit of ribulose 1,5-bisphosphate carboxylase/oxygenase in light-grown Phaseolus vulgaris primary leaves

Sawbridge

López‐Juez

Knight

et al. 1993

Planta

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The level of transcripts of genes encoding the small subunit of ribulose 1,5-bisphosphate carboxylase/ oxygenase (rbcS genes) in the primary leaves of Phaseolus vulgaris L. increases substantially when plants grown in a low fluence rate of white light (15 ~tmol m 2 s-~; 400-700 nm) are transferred to a tenfold higher fluence rate of identical spectral quality. To investigate which photoreceptor acts as the fluence-rate detector, plants grown for 16 d in low white light were transferred to blue-enriched or red light environments of various fluence rates. The results indicate that the fluence-rate-dependent increase in rbcS expression is mediated specifically by blue light. Red light of the same fluence rate, which was found to be equally effective in driving photosynthesis, had much less effect on expression, indicating that light absorbed by the photosynthetic pigments does not mediate the response. Moreover, there is no correlation of the transcript levels with either the cycling rate or photoequilibrium of the phytochrome system. Run-on assays with isolated nuclei indicate that blue light substantially increases the rate of rbcS transcription. Experiments with gene-specific probes show that individual members of the P. vulgaris rbcS gene family exhibit the fluence-rate-dependent, bluelight-mediated increase in expression. Abbreviations: rbcS = genes encoding the small subunit of ribulose 1,5-bisphosphate carboxylase/oxygenase; cab=genes encoding the major light-harvesting chlorophyll-protein of the LHCII complex; Pr, Pfr = the forms of phytochrome absorbing maximally red and far-red light, respectively; ~c=the calculated proportion of phytochrome in the Pfr form Correspondence to: G.I. Jenkins; FAX: 44(41)3304620

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Section: Discussionsupporting

confidence: 93%

A blue-light photoreceptor mediates the fluence-rate-dependent expression of genes encoding the small subunit of ribulose 1,5-bisphosphate carboxylase/oxygenase in light-grown Phaseolus vulgaris primary leaves

Sawbridge

López‐Juez

Knight

et al. 1993

Planta

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“…One important aspect of these experiments is that the non-acclimated controls were healthy light-grown plants under light conditions which sustained growth. The experiments reported here should therefore be distinguished from previous investigations which have used darkadapted plants to demonstrate the potential action of different photoreceptors on photosynthetic components in light-grown plants , and those using mono-chromatic light of low (< 20 pmol m-l s-l) irradiance (Frosch et al, 1985).…”

Section: Discussionmentioning

confidence: 90%

Identity of the Photoreceptors for the Perception of Irradiance in Photosynthetic Light Acclimation in Tomato*

Withers¹,

Vince‐Prue²,

Thomas³

1991

Photochem & Photobiology

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The photoreceptors involved in the photosynthetic acclimation of tomato (Lycopersicon esculentum Mill.) to increased irradiance were investigated. Plants were transferred from 100 pmol r r Z s-' cool white fluorescent light to higher irradiances of white light or white light supplemented with blue, red, green or yellow light. In these experiements light of all wavelengths tested was capable of causing acclimation as measured by the rate of light-saturated photosynthesis. It was concluded that the photosynthetic system rather than the blue-absorbing photoreceptor or phytochrome system acts as the photoreceptor for increased irradiance. No acclimation was observed in response to increased CO, levels, but increasing light integral at a constant irradiance was effective in bringing about acclimation. We conclude that acclimation is a response to increased photosynthetic light capture rather than increased photosynthetic carbon fixation, and involves a photon counting mechanism

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“…Too high light intensity reduces the content of chlorophyll in plants, while low light intensity increases the content of this pigment. The spectral composition also plays an important role in this regulation; blue light tends to lower the relative chlorophyll content of cells, while red light has the opposite effect [ 87 ]. In the specimens of F. vulgaris from Molinia meadows, the content of chlorophyll a (also other values of parameters related to dyes) was significantly lower than in xerothermic grasslands ( Figure 3 ).…”

Section: Discussionmentioning

confidence: 99%

Ecophysiological Parameters of Medicinal Plant Filipendula vulgaris in Diverse Habitat Conditions

Barabasz‐Krasny

Możdżeń

Tatoj

et al. 2022

Biology

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This study attempts to determine which of the habitats occupied by Filipendula vulgaris creates better conditions for its growth and development. Selected physiological parameters—PSII activity, chlorophyll content, electrolyte leakage, hydrogen peroxide content as well as biomass, the occurrence of mycorrhiza, and soil characteristics—were investigated. Grassland soils had a higher content of macronutrients and a lower concentration of heavy metals. The degree of colonization of F. vulgaris by AMF (Arum type) oscillated around high values in both types of stands. Plants growing on xerothermic grasslands achieved much better fluorescence parameters than those collected from meadows. Similar results were obtained from the analysis of chlorophyll content. The destabilization degree of cell membranes was significantly higher in plants collected in meadows than in grasslands. Biomass analysis showed higher values of these parameters in grassland plants. In the case of the parameters of fluorescence emission, plants growing on grasslands achieved significantly lower values than plants collected from meadows. The analyses carried out showed that better conditions for growth and physiological activity of F. vulgaris are probably associated with grasslands on a calcareous substrate.

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Ribulose bisphosphate carboxylase capacity and chlorophyll content in developing seedlings of Chenopodium rubrum L. growing under light of different qualities and fluence rates

Cited by 8 publications

References 44 publications

A blue-light photoreceptor mediates the fluence-rate-dependent expression of genes encoding the small subunit of ribulose 1,5-bisphosphate carboxylase/oxygenase in light-grown Phaseolus vulgaris primary leaves

A blue-light photoreceptor mediates the fluence-rate-dependent expression of genes encoding the small subunit of ribulose 1,5-bisphosphate carboxylase/oxygenase in light-grown Phaseolus vulgaris primary leaves

Identity of the Photoreceptors for the Perception of Irradiance in Photosynthetic Light Acclimation in Tomato*

Ecophysiological Parameters of Medicinal Plant Filipendula vulgaris in Diverse Habitat Conditions

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