Relevant bibliographies by topics / Photorespiration

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Photorespiration'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Photorespiration"

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Peterhansel, Christoph, Ina Horst, Markus Niessen, Christian Blume, Rashad Kebeish, Sophia Kürkcüoglu, and Fritz Kreuzaler. "Photorespiration." Arabidopsis Book 8 (January 2010): e0130. http://dx.doi.org/10.1199/tab.0130.

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Peterhansel, Christoph, and Veronica G. Maurino. "Photorespiration Redesigned." Plant Physiology 155, no. 1 (October 12, 2010): 49–55. http://dx.doi.org/10.1104/pp.110.165019.

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Eckardt, Nancy A. "Photorespiration Revisited." Plant Cell 17, no. 8 (August 2005): 2139–41. http://dx.doi.org/10.1105/tpc.105.035873.

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Zheng, Kunpeng, Yu Bo, Yanda Bao, Xiaolei Zhu, Jian Wang, and Yu Wang. "A Machine Learning Model for Photorespiration Response to Multi-Factors." Horticulturae 7, no. 8 (July 21, 2021): 207. http://dx.doi.org/10.3390/horticulturae7080207.

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Photorespiration results in a large amount of leaf photosynthesis consumption. However, there are few studies on the response of photorespiration to multi-factors. In this study, a machine learning model for the photorespiration rate of cucumber leaves’ response to multi-factors was established. It provides a theoretical basis for studies related to photorespiration. Machine learning models of different methods were designed and compared. The photorespiration rate was expressed as the difference between the photosynthetic rate at 2% O2 and 21% O2 concentrations. The results show that the XGBoost models had the best fit performance with an explained variance score of 0.970 for both photosynthetic rate datasets measured using air and 2% O2, with mean absolute errors of 0.327 and 0.181, root mean square errors of 1.607 and 1.469, respectively, and coefficients of determination of 0.970 for both. In addition, this study indicates the importance of the features of temperature, humidity and the physiological status of the leaves for predicted results of photorespiration. The model established in this study performed well, with high accuracy and generalization ability. As a preferable exploration of the research on photorespiration rate simulation, it has theoretical significance and application prospects.
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Timm, Stefan, and Martin Hagemann. "Photorespiration—how is it regulated and how does it regulate overall plant metabolism?" Journal of Experimental Botany 71, no. 14 (April 10, 2020): 3955–65. http://dx.doi.org/10.1093/jxb/eraa183.

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Abstract Under the current atmospheric conditions, oxygenic photosynthesis requires photorespiration to operate. In the presence of low CO2/O2 ratios, ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) performs an oxygenase side reaction, leading to the formation of high amounts of 2-phosphoglycolate during illumination. Given that 2-phosphoglycolate is a potent inhibitor of photosynthetic carbon fixation, it must be immediately removed through photorespiration. The core photorespiratory cycle is orchestrated across three interacting subcellular compartments, namely chloroplasts, peroxisomes, and mitochondria, and thus cross-talks with a multitude of other cellular processes. Over the past years, the metabolic interaction of photorespiration and photosynthetic CO2 fixation has attracted major interest because research has demonstrated the enhancement of C3 photosynthesis and growth through the genetic manipulation of photorespiration. However, to optimize future engineering approaches, it is also essential to improve our current understanding of the regulatory mechanisms of photorespiration. Here, we summarize recent progress regarding the steps that control carbon flux in photorespiration, eventually involving regulatory proteins and metabolites. In this regard, both genetic engineering and the identification of various layers of regulation point to glycine decarboxylase as the key enzyme to regulate and adjust the photorespiratory carbon flow. Potential implications of the regulation of photorespiration for acclimation to environmental changes along with open questions are also discussed.
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Roell, Marc-Sven, Lennart Schada von Borzyskowski, Philipp Westhoff, Anastasija Plett, Nicole Paczia, Peter Claus, Urte Schlueter, Tobias J. Erb, and Andreas P. M. Weber. "A synthetic C4 shuttle via the β-hydroxyaspartate cycle in C3 plants." Proceedings of the National Academy of Sciences 118, no. 21 (May 17, 2021): e2022307118. http://dx.doi.org/10.1073/pnas.2022307118.

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Plants depend on the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) for CO2 fixation. However, especially in C3 plants, photosynthetic yield is reduced by formation of 2-phosphoglycolate, a toxic oxygenation product of Rubisco, which needs to be recycled in a high-flux–demanding metabolic process called photorespiration. Canonical photorespiration dissipates energy and causes carbon and nitrogen losses. Reducing photorespiration through carbon-concentrating mechanisms, such as C4 photosynthesis, or bypassing photorespiration through metabolic engineering is expected to improve plant growth and yield. The β-hydroxyaspartate cycle (BHAC) is a recently described microbial pathway that converts glyoxylate, a metabolite of plant photorespiration, into oxaloacetate in a highly efficient carbon-, nitrogen-, and energy-conserving manner. Here, we engineered a functional BHAC in plant peroxisomes to create a photorespiratory bypass that is independent of 3-phosphoglycerate regeneration or decarboxylation of photorespiratory precursors. While efficient oxaloacetate conversion in Arabidopsis thaliana still masks the full potential of the BHAC, nitrogen conservation and accumulation of signature C4 metabolites demonstrate the proof of principle, opening the door to engineering a photorespiration-dependent synthetic carbon–concentrating mechanism in C3 plants.
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Shi, Xiaoxiao, and Arnold Bloom. "Photorespiration: The Futile Cycle?" Plants 10, no. 5 (May 1, 2021): 908. http://dx.doi.org/10.3390/plants10050908.

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Photorespiration, or C2 photosynthesis, is generally considered a futile cycle that potentially decreases photosynthetic carbon fixation by more than 25%. Nonetheless, many essential processes, such as nitrogen assimilation, C1 metabolism, and sulfur assimilation, depend on photorespiration. Most studies of photosynthetic and photorespiratory reactions are conducted with magnesium as the sole metal cofactor despite many of the enzymes involved in these reactions readily associating with manganese. Indeed, when manganese is present, the energy efficiency of these reactions may improve. This review summarizes some commonly used methods to quantify photorespiration, outlines the influence of metal cofactors on photorespiratory enzymes, and discusses why photorespiration may not be as wasteful as previously believed.
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Wingler, Astrid, Peter J. Lea, W. Paul Quick, and Richard C. Leegood. "Photorespiration: metabolic pathways and their role in stress protection." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 355, no. 1402 (October 29, 2000): 1517–29. http://dx.doi.org/10.1098/rstb.2000.0712.

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Photorespiration results from the oxygenase reaction catalysed by ribulose–1,5–bisphosphate carboxylase/oxygenase. In this reaction glycollate–2–phosphate is produced and subsequently metabolized in the photorespiratory pathway to form the Calvin cycle intermediate glycerate–3–phosphate. During this metabolic process, CO 2 and NH 3 are produced and ATP and reducing equivalents are consumed, thus making photorespiration a wasteful process. However, precisely because of this inefficiency, photorespiration could serve as an energy sink preventing the overreduction of the photosynthetic electron transport chain and photoinhibition, especially under stress conditions that lead to reduced rates of photosynthetic CO 2 assimilation. Furthermore, photorespiration provides metabolites for other metabolic processes, e.g. glycine for the synthesis of glutathione, which is also involved in stress protection. In this review, we describe the use of photorespiratory mutants to study the control and regulation of photorespiratory pathways. In addition, we discuss the possible role of photorespiration under stress conditions, such as drought, high salt concentrations and high light intensities encountered by alpine plants.
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Badger, Murray R., Hossein Fallahi, Sarah Kaines, and Shunichi Takahashi. "Chlorophyll fluorescence screening of Arabidopsis thaliana for CO2 sensitive photorespiration and photoinhibition mutants." Functional Plant Biology 36, no. 11 (2009): 867. http://dx.doi.org/10.1071/fp09199.

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Exposure of Arabidopsis thaliana (L.) photorespiration mutants to air leads to a rapid decline in the Fv/Fm chlorophyll fluorescence parameter, reflecting a decline in PSII function and an onset of photoinhibition. This paper demonstrates that chlorophyll fluorescence imaging of Fv/Fm can be used as an easy and efficient means of detecting Arabidopsis mutants that are impaired in various aspects of photorespiration. This screen was developed to be sensitive and high throughput by the use of exposure to zero CO2 conditions and the use of array grids of 1-week-old Arabidopsis seedlings as the starting material for imaging. Using this procedure, we screened ~25 000 chemically mutagenised M2 Arabidopsis seeds and recovered photorespiration phenotypes (reduction in Fv/Fm at low CO2) at a frequency of ~4 per 1000 seeds. In addition, we also recovered mutants that showed reduced Fv/Fm at high CO2. Of this group, we detected a novel ‘reverse photorespiration’ phenotype that showed a high CO2 dependent reduction in Fv/Fm. This chlorophyll fluorescence screening technique promises to reveal novel mutants associated with photorespiration and photoinhibition.
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Shi, Qi, Hu Sun, Stefan Timm, Shibao Zhang, and Wei Huang. "Photorespiration Alleviates Photoinhibition of Photosystem I under Fluctuating Light in Tomato." Plants 11, no. 2 (January 12, 2022): 195. http://dx.doi.org/10.3390/plants11020195.

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Fluctuating light (FL) is a typical natural light stress that can cause photodamage to photosystem I (PSI). However, the effect of growth light on FL-induced PSI photoinhibition remains controversial. Plants grown under high light enhance photorespiration to sustain photosynthesis, but the contribution of photorespiration to PSI photoprotection under FL is largely unknown. In this study, we examined the photosynthetic performance under FL in tomato (Lycopersicon esculentum) plants grown under high light (HL-plants) and moderate light (ML-plants). After an abrupt increase in illumination, the over-reduction of PSI was lowered in HL-plants, resulting in a lower FL-induced PSI photoinhibition. HL-plants displayed higher capacities for CO2 fixation and photorespiration than ML-plants. Within the first 60 s after transition from low to high light, PSII electron transport was much higher in HL-plants, but the gross CO2 assimilation rate showed no significant difference between them. Therefore, upon a sudden increase in illumination, the difference in PSII electron transport between HL- and ML-plants was not attributed to the Calvin–Benson cycle but was caused by the change in photorespiration. These results indicated that the higher photorespiration in HL-plants enhanced the PSI electron sink downstream under FL, which mitigated the over-reduction of PSI and thus alleviated PSI photoinhibition under FL. Taking together, we here for the first time propose that photorespiration acts as a safety valve for PSI photoprotection under FL.
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Dissertations / Theses on the topic "Photorespiration"

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CASIRAGHI, FABIO MARCO. "THE INTERPLAY BETWEEN PHOTORESPIRATION AND IRON DEFICIENCY." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/347430.

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ABSTRACT Iron (Fe) is an essential micronutrient for plants as it takes part in major metabolic pathways such as photosynthesis and respiration and is linked to many enzymes that accomplish many other cellular functions (DNA synthesis, nitrogen fixation, hormone production). Fe deficiency reduces crop yields worldwide but particularly in plants grown on calcareous soils, which represent almost the 30% of the earth land surface. In the near future to cope with the increasing demand of food caused by a strong increase in world’s population (FAO estimates in 9 billion people by 2050), agriculture must be extended to marginal areas, many of which include calcareous soils. The most evident effect of Fe deficiency in plant leaves is a marked chlorosis caused by a decrease in chlorophyll biosynthesis, which may result in a reduction in CO2 assimilation rate. In these conditions leaves have low photo-synthetic activity but they absorb more light energy per chlorophyll mol¬ecule than required for photosynthesis, especially under high radiation. This results in a high risk for photoinhibitory and photooxidative dam¬ages in Fe-deficient leaves. The photorespiratory cycle can be considered in these circumstances as an energy dissipating cycle, operating between chloroplasts, peroxisomes, mitochondria and cytosol, which helps to protect chloroplasts from photoinhibition and plants from excessive accumulation of reactive oxygen species. We suggest that Fe deficiency leads to a strong impairment of the photosynthetic apparatus at different levels: an increase in the rate of CO2 assimilation in many biological repetition (+29%) was observed, suggesting a possible induction of photorespiratory metabolism. However, the variation was not significative and so further analysis must be required in order to reduce the variability among the repetition to get more reliable results. In addition, the reduction of CO2 assimilation can be also attributable to a reduced stomatal conductance or to a mesophyll-reduced utilization of CO2. Iron deficiency affects also amminoacid (aa) metabolism since the concentration of Ser and Gly, two aa involved in the photorespiratory metabolism, increased in leaves (+94% and +160%, respectively). Resupply of iron to Fe-deficient plants led to an increase in the concentration of some divalent cations other than Fe like Ca and Mn, whilst Na, Mg, Cu, Zn decrease as Fe sufficient condition are restored. On the other hand, as Fe deficiency proceeds during time, we observed a significant increase in Na, Mg, Zn, Mn content. This alterations suggest that Fe deficiency induces a metabolic imbalance in which other divalent cations are absorbed by unspecific transporter, due to their similar characteristics to Fe. Under our experimental conditions, ROS accumulation detected in cucumber plants grown in the absence of Fe could be attributable to an increase in the activity of enzymes involved in their formation or to a reduced detoxification. We observed a slight induction in the activity of Cu/Zn-SOD isoform whereas a reduction in Fe- and also in Mn-SOD isoforms activity was also recorded. At the same time, the concentration of H2O2 in the leaves of Fe-deficient plants was significantly higher (+40%). This overproduction could lead to an onset of oxidative stress which can lead to further cell damage at different levels also with the involvement of the photosynthetic apparatus. Fe deficiency also induces alterations in peroxisomes at different levels indicating modifications in the photorespiratory metabolism. The complete lack of Fe results in a strong inhibition of catalase activity (-35%). Nevertheless, we detect higher levels of catalase in Fe-deficient plants compared to the control condition. In Fesufficient condition the total activity of hydroxypyruvate reductase was fully attributable to the peroxisomal isoform (HPR1), while we recorded an equal distribution of the activity between the two isoforms, peroxisomal and cytosolic (HPR2) in plants grown under conditions of Fe deficiency. Moreover, the characterization of rice mutant plants defective in mitochondrial Fe importer allow us to investigate the involvement of this organelle in the photorespiratory metabolism during Fe deficiency. The partial loss of function of MIT (mit-2) affects the mitochondrial functionality by decreasing the respiratory chain activity. Furthermore, the transcriptome and the metabolome strongly change in rice mutant plants, in a different way in roots and shoot. Biochemical characterization of purified mitochondria from rice roots showed alteration in the respiratory chain of mit-2 compared to wild type plants. In particular, proteins belonging to the type II alternative NAD(P)H dehydrogenases strongly accumulated in mit-2 plants, indicating that mit-2 mitochondria activate alternative pathways to keep the respiratory chain working. The data obtained and exposed in this doctorate thesis, in agreement with what widely previously reported in literature, allow us to state that the absence or the low Fe bioavailability during the growth of the plants results in several alterations more or less reversible at different levels of the overall metabolic plant system.
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Holbrook, G. P. "Limitations to photosynthesis associated with photorespiration in wheat leaves." Thesis, University of York, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356165.

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Hartwell, James. "The regulation of phosphoenolpyruvate carboxylase in higher plants." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241716.

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Gillon, Jim. "Carbon isotope discrimination : interactions between respiration, leaf conductance and photosynthetic capacity." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363893.

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Bagard, Matthieu Jolivet Yves Dizengremel Pierre. "Impact de l'ozone sur les processus photosynthétiques et photorespiratoires du peuplier (Populus x canescens [Aiton] Sm.) au cours du développement foliaire Aspects écophysiologiques et cellulaires /." S. l. : Nancy 1, 2008. http://www.scd.uhp-nancy.fr/docnum/SCD_T_2008_0017_BAGARD.pdf.

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Liu, Yanpei. "Phosphoregulation of photorespiratory enzymes in Arabidopsis thaliana." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS052/document.

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La photorespiration est un processus essential chez tous les organismes photosynthétiques. Elle est déclenchée par l’activité oxygénase de la Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase (RuBisCO) menant à la production d’une molécule de 3-phosphoglycerate and une molécule de 2-phosphoglycolate (2PG). Le 2PG est toxique et sera recyclé par la photorespiration qui implique huit principales enzymes et prend place dans les chloroplastes, les peroxysomes, les mitochondries et le cytosol. Bien que la photorespiration aboutisse à une efficacité réduite de l’assimilation du CO₂ photosynthétique et soit considérée comme un processus inutile, le phénotype de croissance des mutants d’enzymes photorespiratoires (croissance réduite, chlorose) reflète l’importance de ce processus dans la croissance et le développement normal car il interagit avec plusieurs voies métaboliques primaires. Les données actuelles montrent que sept des huit principales enzymes photorespiratoires pourraient être phosphorylées et qu’ainsi la phosphorylation pourrait être un élément régulateur essentiel du cycle photorespiratoire. Afin de mieux comprendre la régulation du cycle photorespiratoire, nous avons étudié l’effet d’une phosphorylation/ absence de phosphorylation sur la sérine hydroxyméthyltransférase 1 mitochondriale (SHMT1) et de l’hydroxypyruvate réductase peroxisomale en utilisant des versions de ces enzymes mimant une phosphorylation (sérine ou la thréonine mutée en acide aspartique) ou une absence de phosphoryaltion (sérine ou thréonine mutée en alanine).Deux sites sont phosphorylés chez HPR1: S229 et T335. La mutation de ces sites montre que seule la version mimant une phosphorylation sur le site T335 (HPR1 T335D) entraîne une activité réduite de la protéine recombinante HPR1. Ce résultat a été confirmé in vivo puisque le mutant Arabidopsis hpr1 exprimant HPR1 T33D était incapable de totalement complémenter le phénotype photorespiratoire du mutant hpr1.Par complémentation du mutant d’Arabidopsis shm1-1 par une forme sauvage de SHMT1, d’une version mimant (S31D) ou non (S31A) une phosphorylation, les résultats ont montré que toutes les formes de SHMT1 pouvaient presque totalement complémenter le phénotype de croissance de shm1-1. Cependant, chaque ligne transgénique n'avait que 50% de l'activité de SHMT normale. En réponse à un stress dû au sel ou à la sécheresse, les lignées Compl-S31D ont montré un déficit de croissance plus accentué que les autres lignées transgéniques. Cette sensibilité au sel semble refléter les quantités réduites de protéines SHMT1-S31D ainsi qu’une activité plus faible ayant un impact sur le métabolisme des feuilles, entraînant une sous-accumulation de proline et une suraccumulation de polyamines. La mutation S31D de la protéine SHMT1 a également entraîné une réduction de la fermeture stomatique induite par le sel et l'ABA. Ainsi, nos résultats soulignent l’importance du maintien de l’activité du SHMT1 photorespiratoire dans des conditions de stress dû au sel et à la sécheresse et indiquent que la phosphorylation de SHMT1 S31 pourrait être impliquée dans la modulation de la stabilité de la protéine SHMT1
Photorespiration is an essential process in oxygenic photosynthetic organisms, and it is triggered by the oxygenase activity of Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase (RuBisCO) to produce one molecular 3-phosphoglycerate and one molecular 2-phosphoglycolate. The toxic 2-PG is recycled by the photorespiratory pathway which includes eight core enzymes and takes place in chloroplasts, peroxisomes and metochondria and cytosol. Although the photorespiration leads to a reduced efficiency of the photosynthetic CO₂ assimilation and thereby is considered as a wasteful process, the growth phenotype of the photorespiratory enzymes can reflect the importance of this process in normal growth and development of air-grown plants. Normally, for most photorespiratory enzyme mutants, they exhibit small, chlorotic plants sometimes non-viable in air which are not observed when the mutants are grown under high CO₂ condition that limit the photorespiration by reducing the RuBisCO oxygenase activity. Photorespiratory cycle interacts with several major primary metabolic pathways, thus is a highly regulated and extensive works. Current data show that seven of eight core photorespiratory enzymes could be phosphorylated and the protein phosphorylation seems to be a critical regulatory component of the photorespiratory cycle. In order to better understand the regulation of the photorespiratory cycle, we explored the effect of SHMT1 and HPR1 phosphorylation/non-phosphorylation events on plant physiology and metabolism by several methods: Site-directed mutagenesis assay, complementation assay, activity assay, stomatal aperture assays, plant salt/drought resistance assays, metabolites measurement, gas exchange measurement. The results show the phosphorylation mimicking version of HPR1 at T335 results to a less HPR1 activity and retarded growth at the ambient air condition. For the phosphorylation mimicking version of SHMT1 at S31 resulted in a less stability leading to a reduced resistance to drought and salt stress. The decline of resistance against abiotic stress was mainly due to impairment in the closure of stomata which were unable to respond properly to ABA probably because of a default in the PLC pathway. So there results indicate that the phosphorylation of SHTM1 leads to a negative effect for the plant growth especially under stress condition. Thus, we propose that the SHMT1 can be phosphorylated at a basic level under normal growth conditions, once the photorespiratory flux is increased such under salt stress condition, the SHMT1 should be dephosphorylated to stabilize SHMT1 and sustain a high photorespiration flux to cope with reduced CO₂ availability
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Carvalho, Josirley De Fátima Corrêa. "Manipulating carbon metabolism to enhance stress tolerance : (short circuiting photorespiration in tobacco)." Thesis, Lancaster University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435874.

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Duminil, Pauline. "Characterization of two primary metabolism enzymes in Arabidopsis thaliana : phosphoglycerate mutase and phosphoglycolate phosphatase." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS591.

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Les plantes sont des organismes sessiles. Elles doivent réagir rapidement et efficacement aux stress biotiques et abiotiques qu’elles subissent. Pour cela, elles utilisent plusieurs niveaux de régulation. L’un d’eux, rapide et réversible, consiste a effectuer des modifications post-traductionnelles (PTMs) sur ses enzymes. La PTM la plus répandue est la phosphorylation protéique, qui intervient dans diverses voies du métabolisme primaire. La glycolyse permet la production d’énergie (ATP) et de pouvoir réducteur à partir de glucose. La régulation de la phosphoglycérate mutase d’Arabidopsis thaliana (AtiPGAM) a été étudiée grâce à une analyse d’un site de phosphorylation dans le but d’élucider le mécanisme réactionnel. La photorespiration est un processus essentiel pour les organismes photosynthétiques. Ce cycle, initié par l’activité oxygénase de la ribulose-1,5-biphosphate carboxylase / oxygénase (RuBisCO), produit notamment une molécule de 2-phosphoglycolate (2-PG), toxique pour la plante. Le recyclage, couteux, du 2-PG par le cycle photorespiratoire se déroule dans quatre compartiments (chloroplaste, peroxysome, mitochondrie et cytosol). Sept des huit enzymes du cycle photorespiratoire sont phosphorylables. La phosphoglycolate phosphatase (AtPGLP1), première enzyme du cycle, est associée à quatre phosphosites. Des approches in vitro et in planta développées chez A. thaliana ont permis d’acquérir de nouvelles données sur la régulation post-traductionnelle de cette protéine, à la fois par phosphorylation et par oxydo-réduction
As sessile organisms, plants need to rapidly and effectively react to environmental abiotic and biotic stresses. To do so, various regulatory mechanisms exist that include post-translational modifications (PTMs) of proteins. One of the most prevalent PTM is protein phosphorylation that has been shown to occur in many metabolic pathways. Glycolysis allows the production of energy (as ATP) and reducing power from glucose. In this context, the regulation of Arabidopsis thaliana phosphoglycerate mutase (AtiPGAM) was studied by analysing a phosphorylation site potentially involved in the reaction mechanism of this glycolytic enzyme. The photorespiratory cycle is a major metabolic pathway occurring in all photosynthetic organisms. It is initiated by the oxygenase activity of the ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) and leads to the production of toxic 2-phosphoglycolate (2-PG) molecules. The costly recycling of 2-PG by the photorespiratory cycle takes place in four different compartments (chloroplast, peroxisome, mitochondrion and cytosol). Seven of the eight core photorespiratory enzymes appear to be phosphorylated. Phosphoglycolate phosphatase (AtPGLP1), the first enzyme of the cycle that metabolizes 2-PG to glycolate, is associated with four phosphosites. In vivo and in vitro approaches using Arabidopsis thaliana have allowed us to obtain further insights into the post-translational regulation of this protein by protein phosphorylation and by oxidation-reduction
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Blackwell, Raymond David. "Isolation and characterisation of mutants of higher plants unable to carry out photorespiration." Thesis, Lancaster University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328522.

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Laureau, Constance. "Le rôle de la PTOX dans l’acclimatation des plantes alpines aux conditions extrêmes." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112125/document.

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Le climat alpin à plus de 2400 mètres d’altitude montre des fortes variations de température, des intensités lumineuses très élevées (3000 µmol photons m-2 s-1) qui sont connues pour générer un état de réduction importante de la chaine de transport des électrons photosynthétique. Le bon fonctionnement du processus photosynthétique est primordial pour les quelques espèces de plantes vasculaires qui sont présentes à l’étage alpin et qui doivent terminer leur cycle de vie lors d’une très courte période de végétation.Soldanella alpina et Ranunculus glacialis sont deux espèces inféodées aux étages alpin et nival. Dans leur site naturel de croissance nous avons mesuré des températures faibles (0.7°C) et fortes (37°C) sous des lumières supérieures à 2500 µmol photons m-2 s-1. Chez les espèces non-alpines ces conditions induisent la photoinhibition du PSII, ce qui est évité chez S. alpina et R. glacialis, par des mécanismes très différents. Les systèmes antioxydants et le quenching non photochimique sont particulièrement importants chez S. alpina. Chez Ranunculus glacialis, la photorespiration reste très importante et un contenu élevé en PTOX est décrit. Le rôle des antioxydants et de la PTOX dans la photoprotection des deux espèces ont été étudiés. Dans une partie de thèse, nous avons montré qu’une diminution de la capacité antioxydante par une diminution de la concentration en glutathion n’affecte pas la tolérance vis-à-vis de la photoinhibition à basse température. Dans une deuxième partie les résultats supposent qu’une surexpression de la PTOX chez le tabac augmente la photoinhibition à lumière forte par production des espèces réactives d’oxygène. En utilisant différentes conditions environnementales de croissance pour Ranunculus glacialis, nous avons pu montrer que l’expression de la PTOX est induite par des fortes lumières et non par des basses températures. Grâce à une approche associant mesures d’échanges gazeux et mesures de la fluorescence de la chlorophylle, nous avons montré qu’un flux d’électrons conséquent vers l’oxygène, indépendant de la photorespiration, corrélait avec la présence de la PTOX mais que l’activité de la PTOX sous des conditions qui permettent l’assimilation du CO2 et la photorespiration n’est pas maximale. Grâce à des mesures de fluorescence chlorophyllienne en présence de différents inhibiteurs photosynthétiques, nous avons pu montrer que l’importance de ce flux d’électrons vers l’oxygène corrèle avec la quantité de PTOX présente dans les feuilles, dans des conditions réductrices. Ces résultats nous ont amenés à conclure que chez Ranunculus glacialis, la PTOX peut prendre en charge un flux significatif d’électrons, éviter ainsi l’apparition d’un état réduit de la chaine de transfert photosynthétique, et protéger la plante vis-à-vis de la photoinhibition en agissant comme une valve de sécurité. Ces travaux permettent d’apporter des précisions sur un modèle original de photoprotection, qui a été l’objet de nombreuses controverses
The alpine climate above 2400 meters altitude shows large variations in temperature and very important light intensity (3000 µmol photons m-2 s-1), which are known to generate a state of significant reduction in the photosynthetic electron transport chain. The proper functioning of the photosynthetic process is essential for vascular plants species that are present in this alpine environment and must complete their life cycle within a very short growing season.Soldanella alpina and Ranunculus glacialis are two species restricted to alpine and snow floors. In their natural growth environment we measured very low (0.7 ° C) and high temperature (37 ° C) under lights above 2500 µmol photons m-2 s-1. Among non-alpine species such conditions induce photoinhibition of PSII, which is avoided in S. alpina and R. glacialis, by very different mechanisms. Antioxidant systems and non-photochemical quenching are particularly important in S. alpina. In Ranunculus glacialis, photorespiration remains very important and a high content of PTOX is described. The roles of antioxidants and PTOX in photoprotection of both species were studied.In one part of the thesis, we showed that a decrease in antioxidant capacity by reducing the concentration of glutathione does not affect tolerance to low-temperature photoinhibition. In the second part the results imply that overexpression of PTOX in tobacco enhances photoinhibition by strong light to produce reactive oxygen species.Using different environmental conditions for Ranunculus glacialis growth, we showed that expression of the PTOX is induced by strong light, but not by low temperatures. With an approach combining gas exchange measurements and chlorophyll fluorescence measurements, we showed that an electron flow to oxygen, independent of photorespiration, correlated with the presence of PTOX. Through measures of chlorophyll fluorescence in the presence of various inhibitors photosynthetic, we could show that the importance of this electron flow to oxygen correlates with the amount of PTOX in the leaves, under reducing conditions. These results led us to conclude that in Ranunculus glacialis, the PTOX may support a significant flow of electrons, thus avoiding the appearance of a reduced state of the photosynthetic chain transfer, and protect the plant from photoinhibition, acting as a safety valve. These studies are discussed to help clarify a new pathway of photoprotection, which was the subject of much controversy
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Books on the topic "Photorespiration"

1

Fernie, Alisdair R., Hermann Bauwe, and Andreas P. M. Weber, eds. Photorespiration. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7225-8.

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Walker, Berkley J., ed. Photorespiration. New York, NY: Springer US, 2024. http://dx.doi.org/10.1007/978-1-0716-3802-6.

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universitet, Uppsala, ed. Glycolate metabolism in cyanobacteria. Uppsala: Uppsala University, 1989.

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1899-, Nichiporovich A. A., Nauchnyĭ t͡sentr biologicheskikh issledovaniĭ (Akademii͡a nauk SSSR), Nauchnyĭ sovet po problemam fotosinteza i fotobiologii rasteniĭ (Akademii͡a nauk SSSR), and Institut fiziologii rasteniĭ im. K.A. Timiri͡azeva., eds. Simpozium Ėlementy gazoobmena lista i t͡selogo rastenii͡a i ikh izmenenii͡a v ontogeneze: 19-22 noi͡abri͡a 1985 g., Moskva : tezisy dokladov. Pushchino: Nauch. t͡sentr biologicheskikh issledovaniĭ AN SSSR v Pushchine, 1985.

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Hopkins, William G. Photosynthesis and respiration. Philadelphia: Chelsea House Publishers, 2006.

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1935-, Ellis R. J., Gray J. C, and Royal Society (Great Britain), eds. Ribulose bisphosphate carboxylase-oxygenase: Proceedings of a Royal Society discussion meeting held on 4 and 5 December 1985. London: The Royal Society of London, 1986.

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Wheeler, R. M. Carbon dioxide and water exchange rates by a wheat crop in NASA's biomass production chamber: Results from an 86-day study (January to April 1989). [Kennedy Space Center, Fla.]: National Aeronautics and Space Administration, John F. Kennedy Space Center, 1990.

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Wheeler, R. M. Carbon dioxide and water exchange rates by a wheat crop in NASA's biomass production chamber: Results from an 86-day study (January to April 1989). [Kennedy Space Center, Fla.]: National Aeronautics and Space Administration, John F. Kennedy Space Center, 1990.

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Bauwe, Hermann, Andreas Weber, and Alisdair Fernie. Photorespiration: Methods and Protocols. Springer New York, 2017.

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Bauwe, Hermann, Andreas P. M. Weber, and Alisdair R. Fernie. Photorespiration: Methods and Protocols. Springer New York, 2018.

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Book chapters on the topic "Photorespiration"

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Dennis, David T. "Photorespiration." In The Biochemistry of Energy Utilization in Plants, 107–13. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3121-3_10.

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Gooch, Jan W. "Photorespiration." In Encyclopedic Dictionary of Polymers, 915. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_14495.

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Douce, Roland, and Hans-Walter Heldt. "Photorespiration." In Photosynthesis, 115–36. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/0-306-48137-5_5.

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Kendall, A. C., S. W. J. Bright, N. P. Hall, A. J. Keys, P. J. Lea, J. C. Turner, and R. M. Wallsgrove. "Barley Photorespiration Mutants." In Progress in Photosynthesis Research, 629–32. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-017-0516-5_133.

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Zou, Dinghui, and Juntian Xu. "Photorespiration and Dark Respiration." In Research Methods of Environmental Physiology in Aquatic Sciences, 149–52. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5354-7_17.

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Čatský, J., and Ingrid Tichá. "Photorespiration during Leaf Ontogeny." In Photosynthesis during leaf development, 250–62. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5530-1_10.

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Engqvist, Martin K. M., and Veronica G. Maurino. "Metabolic Engineering of Photorespiration." In Methods in Molecular Biology, 137–55. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7225-8_10.

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Zhao, Honglong, Yi Xiao, and Xin-Guang Zhu. "Kinetic Modeling of Photorespiration." In Methods in Molecular Biology, 203–16. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7225-8_14.

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Beardall, John, Antonietta Quigg, and John A. Raven. "Oxygen Consumption: Photorespiration and Chlororespiration." In Photosynthesis in Algae, 157–81. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-007-1038-2_8.

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Oliver, David J., and Per Gardeström. "Photorespiration: Photosynthesis in the Mitochondria." In Plant Mitochondria: From Genome to Function, 293–306. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2400-9_13.

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Conference papers on the topic "Photorespiration"

1

Wilkes, Elise, Alex Sessions, and John Eiler. "Development of a Position-Specific Isotopic Proxy for Photorespiration." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2865.

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Basu, Debarati. "Tackling photorespiration: Improving photosynthetic efficiency without compromising existing auxiliary functions." In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1053047.

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Lloyd, Max, Rebekah Stein, Daniel Stolper, Korbinian Thalhammer, Richard Barclay, Scott Wing, David Stahle, and Todd Dawson. "Plant photorespiration reconstructed with isotopic clumping in wood methoxyl groups." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.12334.

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Bao, Han. "Enhancing the efficiency of photorespiration through optimization of catalase temperature response." In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1052966.

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Walker, Berkley. "CO2 release from photorespiration can increase following alternative n-enzymatic decarboxylations in a catalase mutant." In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1350596.

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Fu, Xinyu. "Expanding n-stationary Metabolic Flux Analysis to Unravel the Impact of Photorespiration on Central Metabolism." In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1007223.

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Stein, Rebekah, Max K. Lloyd, Barbara E. Wortham, Todd E. Dawson, and Daniel A. Stolper. "METHOXY CLUMPED ISOTOPES IN WOOD AS A RECORD OF PHOTORESPIRATION: CASE STUDIES FROM GLACIAL-INTERGLACIAL PERIODS IN THE QUATERNARY." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-382196.

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Reports on the topic "Photorespiration"

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Kirchhoff, Helmut, and Ziv Reich. Protection of the photosynthetic apparatus during desiccation in resurrection plants. United States Department of Agriculture, February 2014. http://dx.doi.org/10.32747/2014.7699861.bard.

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In this project, we studied the photosynthetic apparatus during dehydration and rehydration of the homoiochlorophyllous resurrection plant Craterostigmapumilum (retains most of the photosynthetic components during desiccation). Resurrection plants have the remarkable capability to withstand desiccation, being able to revive after prolonged severe water deficit in a few days upon rehydration. Homoiochlorophyllous resurrection plants are very efficient in protecting the photosynthetic machinery against damage by reactive oxygen production under drought. The main purpose of this BARD project was to unravel these largely unknown protection strategies for C. pumilum. In detail, the specific objectives were: (1) To determine the distribution and local organization of photosynthetic protein complexes and formation of inverted hexagonal phases within the thylakoid membranes at different dehydration/rehydration states. (2) To determine the 3D structure and characterize the geometry, topology, and mechanics of the thylakoid network at the different states. (3) Generation of molecular models for thylakoids at the different states and study the implications for diffusion within the thylakoid lumen. (4) Characterization of inter-system electron transport, quantum efficiencies, photosystem antenna sizes and distribution, NPQ, and photoinhibition at different hydration states. (5) Measuring the partition of photosynthetic reducing equivalents between the Calvin cycle, photorespiration, and the water-water cycle. At the beginning of the project, we decided to use C. pumilum instead of C. wilmsii because the former species was available from our collaborator Dr. Farrant. In addition to the original two dehydration states (40 relative water content=RWC and 5% RWC), we characterized a third state (15-20%) because some interesting changes occurs at this RWC. Furthermore, it was not possible to detect D1 protein levels by Western blot analysis because antibodies against other higher plants failed to detect D1 in C. pumilum. We developed growth conditions that allow reproducible generation of different dehydration and rehydration states for C. pumilum. Furthermore, advanced spectroscopy and microscopy for C. pumilum were established to obtain a detailed picture of structural and functional changes of the photosynthetic apparatus in different hydrated states. Main findings of our study are: 1. Anthocyan accumulation during desiccation alleviates the light pressure within the leaves (Fig. 1). 2. During desiccation, stomatal closure leads to drastic reductions in CO2 fixation and photorespiration. We could not identify alternative electron sinks as a solution to reduce ROS production. 3. On the supramolecular level, semicrystalline protein arrays were identified in thylakoid membranes in the desiccated state (see Fig. 3). On the electron transport level, a specific series of shut downs occur (summarized in Fig. 2). The main events include: Early shutdown of the ATPase activity, cessation of electron transport between cyt. bf complex and PSI (can reduce ROS formation at PSI); at higher dehydration levels uncoupling of LHCII from PSII and cessation of electron flow from PSII accompanied by crystal formation. The later could severe as a swift PSII reservoir during rehydration. The specific order of events in the course of dehydration and rehydration discovered in this project is indicative for regulated structural transitions specifically realized in resurrection plants. This detailed knowledge can serve as an interesting starting point for rationale genetic engineering of drought-tolerant crops.
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