References of "Physiologia Plantarum"
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See detailMetal response of transgenic tomato plants expressing P1B-ATPase
Barabasz, Anna; Wilkowska, Anna; Ruszczyńska, Anna et al

in Physiologia Plantarum (2012), 145

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See detailCatalase Inhibition Alters Suberization And Wound Healing In Potato (Solanum Tuberosum) Tubers
Bajji, M.; M'Hamdi, M.; Gastiny, F. et al

in Physiologia Plantarum (2007), 129(3), 472-483

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See detailAcclimation of Arabidopsis thaliana to long-term CO2 enrichment and nitrogen supply is basically a matter of growth rate adjustment
Tocquin, Pierre ULg; Ormenese, Sandra ULg; Pieltain, Alexandra ULg et al

in Physiologia Plantarum (2006), 128(4), 677-688

The long-term response of Arabidopsis thaliana to increasing CO2 was evaluated in plants grown in 800 mu l 1(-1) CO2 from sowing and maintained, in hydroponics, on three nitrogen supplies: "low," "medium ... [more ▼]

The long-term response of Arabidopsis thaliana to increasing CO2 was evaluated in plants grown in 800 mu l 1(-1) CO2 from sowing and maintained, in hydroponics, on three nitrogen supplies: "low," "medium" and "high." The global response to high CO2 and N-supply was evaluated by measuring growth parameters in parallel with photosynthetic activity, leaf carbohydrates, ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) messenger RNA and protein, stomatal conductance (g(s)) and density. CO2 enrichment was found to stimulate biomass production, whatever the N-supply. This stimulation was transient on low N-supply and persisted throughout the whole vegetative growth only in high N-supply. Acclimation on low N-high CO2 was not associated with carbohydrate accumulation or with a strong reduction in Rubisco amount or activity. At high N-supply, growth stimulation by high CO2 was mainly because of the acceleration of leaf production and expansion while other parameters such as specific leaf area, root/shoot ratio and g, appeared to be correlated with total leaf area. Our results thus suggest that, in strictly controlled and stable growing conditions, acclimation of A. thaliana to longterm CO2 enrichment is mostly controlled by growth rate adjustment. [less ▲]

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See detailDelayed chlorophyll accumulation and pigment photodestruction in the epicotyls of dark-grown pea (Pisum sativum)
Boddi, B.; Loudeche, R.; Franck, Fabrice ULg

in Physiologia Plantarum (2005), 125(3), 365-372

A comparison was performed of the tetrapyrrole transformations that occur upon irradiation of epicotyl or leaves of dark-grown Pisum sativum L. (var. Zsuzsi, Hungary). High performance liquid ... [more ▼]

A comparison was performed of the tetrapyrrole transformations that occur upon irradiation of epicotyl or leaves of dark-grown Pisum sativum L. (var. Zsuzsi, Hungary). High performance liquid chromatography analysis after continuous or flash-irradiation showed that the biosynthetic pathway from protochlorophyllide (Pchlide) to chlorophyll (Chl) a was markedly slowed down at the step of the reduction of geranylgeranyl(gg)-Chl to dihydrogeranylgeranyl (dhgg)-Chl in epicotyls, whereas phytyl-Chl was synthesized in leaves subjected to the same light treatments. Quantitative pigment analysis during continuous irradiations of different intensities also showed that significant Pchlide photodestruction occurred in epicotyls even under weak light. When both Pchlide and chlorophyllide and/or chlorophylls were present in epicotyls, Pchlide photodestruction was faster under 630-nm light than under 670-nm light, which indicates that this process is most efficiently promoted by Pchlide excitation. Pre-incubation of epicotyl segments with 10 mM ascorbate partly alleviated pigment photodestruction in white light. It is concluded that formation of photoactive Pchlide-Pchlide oxidoreductase complexes is important to prevent fast pigment photooxidation after Pchlide accumulation in the dark. [less ▲]

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See detailGibberellins and the floral transition in Sinapis alba
Corbesier, Laurent; Kustermans, Gaëlle ULg; Périlleux, Claire ULg et al

in Physiologia Plantarum (2004), 122(1), 152-158

The putative role of gibberellins in the transition to flowering was investigated in Sinapis alba, a caulescent long-day (LD) plant. It was observed that: (1) physiological doses of exogenous gibberellins ... [more ▼]

The putative role of gibberellins in the transition to flowering was investigated in Sinapis alba, a caulescent long-day (LD) plant. It was observed that: (1) physiological doses of exogenous gibberellins (GA(1), GA(3), GA(9)) do not cause the floral shift of the meristem when applied to plants grown in short days but have some positive effect on the flowering response to a suboptimal LD; no inhibition was observed in any case; (2) GA-biosynthesis inhibitors (prohexadione-Ca and paclobutrazol) considerably inhibit stem growth but have some negative effect on flowering only when a suboptimal LD is given; and (3) the floral transition induced by one 22-h LD does not correlate with any detectable change in GA content of the apical bud, of the leaves, and of the phloem exudate reaching the apex. Taken together, these results suggest that GAs do not act as a major signal for photoperiodic flower induction in Sinapis. [less ▲]

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See detailChanges in endothermic transitions associated with light-induced chlorophyllide formation, as investigated by differential scanning calorimetry
Mysliwa-Kurdziel, B.; Franck, Fabrice ULg; Chahdi, M. A. O. et al

in Physiologia Plantarum (1999), 107(2), 230-239

The changes in thermal transitions associated with protochlorophyllide (Pchlide) into chlorophyllide (Chlide) phototransformation were investigated using sensitive differential scanning calorimetry (DSC ... [more ▼]

The changes in thermal transitions associated with protochlorophyllide (Pchlide) into chlorophyllide (Chlide) phototransformation were investigated using sensitive differential scanning calorimetry (DSC), Two groups of endothermic transitions, each composed of several components, were observed between 25 and 90 degrees C for prolamellar body (PLB) membranes isolated from etiolated wheat (Triticum aestivum) leaves. The first group, located in the 20-45 degrees C region, was strongly affected by a short light pulse given prior to measurement, A decrease of this group of transitions was observed shortly after illumination and it was hardly detected in PLBs measured after the Chlide Shibata shift. Calorimetric results were supported by 77-K fluorescence emission spectra measured for continuously heated samples at different temperatures. We interpreted the DSC band observed between 20 and 45 degrees C as due to the disaggregation of Pchlide- (or Chlide-)-reductase-NADPH complexes, More detailed analysis using Gaussian deconvolution showed that this band was composed of three transitions at 32, 39 and 41 degrees C. The second group of transitions was detected in the 45-80 degrees C region, the same as for mature thylakoids. Its main component at 60 degrees C was not affected significantly by a short light pulse. By comparison of thermograms obtained for PLBs with those for mature thylakoid membranes, this transition was identified as the ATPase denaturation band. [less ▲]

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See detailDifferential growth dependency of normal and habituated sugarbeet cell lines upon endogenous ethylene production and exogenous ethylene application
Bisbis, Badia; Kevers, Claire ULg; Creche, Joel et al

in Physiologia Plantarum (1998), 103(2), 201-208

A fully habituated (auxin- and cytokinin-independent) nonorganogenic (HNO) sugarbeet (Beta vulgaris) callus produces very little ethylene as compared with a normal (N) hormone-requiring callus of the same ... [more ▼]

A fully habituated (auxin- and cytokinin-independent) nonorganogenic (HNO) sugarbeet (Beta vulgaris) callus produces very little ethylene as compared with a normal (N) hormone-requiring callus of the same strain. Both callus types react by growth changes to application of inhibitors of ethylene biosynthesis and ethylene action, of 1-aminocyclopropane-1-carboxylic acid (ACC) as the immediate precursor of ethylene, to transfer from light to darkness, and also to application of exogenous ethylene or an ethylene trapper. This indicates their growth dependency upon their endogenously biosynthesized ethylene and also their sensitivity to exogenous gas. However, the sensitivity was generally higher for the HNO callus producing naturally less ethylene. The weaker reaction of the HNO callus to the exogenous ethylene was attributed to its hyperhydric status (a water layer surrounding the cells). Because low ethylene production appears as a general characteristic of habituated cell lines, the causal and/or consequential relationships of this low ethylene production with other characteristics of habituated tissues (absence of exogenous hormones in the culture media, deficiency of cell differentiation, accumulation of polyamines in neoplastic tissues) are discussed. [less ▲]

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See detailChanges in nitrogen source modify distribution of excitation energy in the cyanobacterium Phormidium laminosum
deAlda, JAGO; Tapia, M. I.; Franck, Fabrice ULg et al

in Physiologia Plantarum (1996), 97(1), 69-78

In an attempt to clarify the interactions between the available nitrogen source and the photosystems in cyanobacteria, O-2 exchange and fluorescence emission were monitored in spheroplasts and intact ... [more ▼]

In an attempt to clarify the interactions between the available nitrogen source and the photosystems in cyanobacteria, O-2 exchange and fluorescence emission were monitored in spheroplasts and intact cells of the non N-2-fixing cyanobacterium Phormidium laminosum (strain OH-1-p.Cl-1) growing on different nitrogen sources or in the absence of nitrogen. Short-term (time scale of seconds to minutes), NH4+ addition to NO3--growing or N-starved cells and, to a minor extent, NO3- addition to N-starved cells, induced state 2 transitions both in light and dark. Long term (time scale of days), the fluorescence yield of PSI relative to that of PSII at 77 K was higher in NO3-- than in NH4-+ growing cells, and even higher in N-starved cells. In the dark, the plastoquinone pool was more reduced in NH4-+ than in NO3--growing cells. Both PSII and PSI activities and the degree of linking between both photosystems were affected in the long term, so that non-cyclic electron transport decreased in parallel to the ferredoxin requirement to assimilate each nitrogen source. Results indicate that nitrogen metabolism exerts short- and long-term control over the photosynthetic apparatus, which acclimates to the energy requirement of the available nitrogen source. [less ▲]

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See detailCircadian rhythms and the induction of flowering in the long-day plant Lolium temulentum L.
Périlleux, Claire ULg; Bernier, Georges; Kinet, Jean-Marie

in Physiologia Plantarum (1991), 85

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