1
|
Doireau R, Jaślan J, Cubero-Font P, Demes-Causse E, Bertaux K, Cassan C, Pétriarcq P, De Angeli A. AtALMT5 mediates vacuolar fumarate import and regulates the malate/fumarate balance in Arabidopsis. THE NEW PHYTOLOGIST 2024. [PMID: 39238122 DOI: 10.1111/nph.20077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Accepted: 08/09/2024] [Indexed: 09/07/2024]
Abstract
Malate and fumarate constitute a significant fraction of the carbon fixed by photosynthesis, and they are at the crossroad of central metabolic pathways. In Arabidopsis thaliana, they are transiently stored in the vacuole to keep cytosolic homeostasis. The malate and fumarate transport systems of the vacuolar membrane are key players in the control of cell metabolism. Notably, the molecular identity of these transport systems remains mostly unresolved. We used a combination of imaging, electrophysiology and molecular physiology to identify an important molecular actor of dicarboxylic acid transport across the tonoplast. Here, we report the function of the A. thaliana Aluminium-Activated Malate Transporter 5 (AtALMT5). We characterised its ionic transport properties, expression pattern, localisation and function in vivo. We show that AtALMT5 is expressed in photosynthetically active tissues and localised in the tonoplast. Patch-clamp and in planta analyses demonstrated that AtALMT5 is an ion channel-mediating fumarate loading of the vacuole. We found in almt5 plants a reduced accumulation of fumarate in the leaves, in parallel with increased malate concentrations. These results identified AtALMT5 as an ion channel-mediating fumarate transport in the vacuoles of mesophyll cells and regulating the malate/fumarate balance in Arabidopsis.
Collapse
Affiliation(s)
- Roxane Doireau
- IPSiM, Univ Montpellier, CNRS, INRAE, Institut Agro, 34060, Montpellier, France
| | - Justyna Jaślan
- IPSiM, Univ Montpellier, CNRS, INRAE, Institut Agro, 34060, Montpellier, France
| | - Paloma Cubero-Font
- IPSiM, Univ Montpellier, CNRS, INRAE, Institut Agro, 34060, Montpellier, France
| | - Elsa Demes-Causse
- IPSiM, Univ Montpellier, CNRS, INRAE, Institut Agro, 34060, Montpellier, France
| | - Karen Bertaux
- IPSiM, Univ Montpellier, CNRS, INRAE, Institut Agro, 34060, Montpellier, France
| | - Cédric Cassan
- UMR BFP, University Bordeaux, INRAE, 33882, Villenave d'Ornon, France
- Bordeaux Metabolome, MetaboHUB, PHENOME-EMPHASIS, 33140, Villenave d'Ornon, France
| | - Pierre Pétriarcq
- UMR BFP, University Bordeaux, INRAE, 33882, Villenave d'Ornon, France
- Bordeaux Metabolome, MetaboHUB, PHENOME-EMPHASIS, 33140, Villenave d'Ornon, France
| | - Alexis De Angeli
- IPSiM, Univ Montpellier, CNRS, INRAE, Institut Agro, 34060, Montpellier, France
| |
Collapse
|
2
|
Haq ME, Mira MM, Duncan RW, Hill RD, Stasolla C. Seed-specific expression of the class 2 Phytoglobin (Pgb2) increases seed oil in Brassica napus. JOURNAL OF PLANT PHYSIOLOGY 2023; 287:154032. [PMID: 37392526 DOI: 10.1016/j.jplph.2023.154032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 07/03/2023]
Abstract
To examine the function of phytoglobin 2 (Pgb2) on seed oil level in the oil-producing crop Brassica napus L., we generated transgenic plants in which BnPgb2 was over-expressed in the seeds using the cruciferin1 promoter. Over-expression of BnPgb2 elevated the amount of oil, which showed a positive relationship with the level of BnPgb2, without altering the oil nutritional value, as evidenced by the lack of major changes in composition of fatty acids (FA), and key agronomic traits. Two key transcription factors, LEAFY COTYLEDON1 (LEC1) and WRINKLED1 (WRI1), known to promote the synthesis of fatty acids (FA) and potentiate oil accumulation, were induced in BnPgb2 over-expressing seeds. The concomitant induction of several enzymes of sucrose metabolism, SUCROSE SYNTHASE1 (SUS) 1 and 3, FRUCTOSE BISPHOSPHATE ALDOLASE (FPA), and PHOSPHOGLYCERATE KINASE (PGK), and starch synthesis, ADP-GLUCOSE PHOSPHORYLASE (AGPase) suggests that BnPgb2 favors sugar mobilization for FA production. The two plastid FA biosynthetic enzymes SUBUNIT A OF ACETYL-CoA CARBOXYLASE (ACCA2), and MALONYL-CoA:ACP TRANSACYLASE (MCAT) were also up-regulated by the over-expression of BnPgb2. The requirement of BnPgb2 for oil deposition was further evidenced in natural germplasm by the higher levels of BnPgb2 in seeds of high-oil genotypes relative to their low-oil counterparts.
Collapse
Affiliation(s)
- Md Ehsanul Haq
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2Z2, MB, Canada
| | - Mohammed M Mira
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2Z2, MB, Canada
| | - Robert W Duncan
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2Z2, MB, Canada
| | - Robert D Hill
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2Z2, MB, Canada
| | - Claudio Stasolla
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2Z2, MB, Canada.
| |
Collapse
|
3
|
Avidan O, Moraes TA, Mengin V, Feil R, Rolland F, Stitt M, Lunn JE. In vivo protein kinase activity of SnRK1 fluctuates in Arabidopsis rosettes during light-dark cycles. PLANT PHYSIOLOGY 2023; 192:387-408. [PMID: 36725081 PMCID: PMC10152665 DOI: 10.1093/plphys/kiad066] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/12/2022] [Accepted: 01/09/2023] [Indexed: 05/03/2023]
Abstract
Sucrose-nonfermenting 1 (SNF1)-related kinase 1 (SnRK1) is a central hub in carbon and energy signaling in plants, and is orthologous with SNF1 in yeast and the AMP-activated protein kinase (AMPK) in animals. Previous studies of SnRK1 relied on in vitro activity assays or monitoring of putative marker gene expression. Neither approach gives unambiguous information about in vivo SnRK1 activity. We have monitored in vivo SnRK1 activity using Arabidopsis (Arabidopsis thaliana) reporter lines that express a chimeric polypeptide with an SNF1/SnRK1/AMPK-specific phosphorylation site. We investigated responses during an equinoctial diel cycle and after perturbing this cycle. As expected, in vivo SnRK1 activity rose toward the end of the night and rose even further when the night was extended. Unexpectedly, although sugars rose after dawn, SnRK1 activity did not decline until about 12 h into the light period. The sucrose signal metabolite, trehalose 6-phosphate (Tre6P), has been shown to inhibit SnRK1 in vitro. We introduced the SnRK1 reporter into lines that harbored an inducible trehalose-6-phosphate synthase construct. Elevated Tre6P decreased in vivo SnRK1 activity in the light period, but not at the end of the night. Reporter polypeptide phosphorylation was sometimes negatively correlated with Tre6P, but a stronger and more widespread negative correlation was observed with glucose-6-phosphate. We propose that SnRK1 operates within a network that controls carbon utilization and maintains diel sugar homeostasis, that SnRK1 activity is regulated in a context-dependent manner by Tre6P, probably interacting with further inputs including hexose phosphates and the circadian clock, and that SnRK1 signaling is modulated by factors that act downstream of SnRK1.
Collapse
Affiliation(s)
- Omri Avidan
- Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Thiago A Moraes
- Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Virginie Mengin
- Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Regina Feil
- Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Filip Rolland
- Laboratory of Molecular Plant Biology, KU Leuven, B-3001 Leuven, Belgium
- KU Leuven Plant Institute (LPI), B-3001 Leuven, Belgium
| | - Mark Stitt
- Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - John E Lunn
- Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| |
Collapse
|
4
|
Lourkisti R, Antoine S, Pailly O, Luro F, Gibon Y, Oustric J, Santini J, Berti L. GABA shunt pathway is stimulated in response to early defoliation-induced carbohydrate limitation in Mandarin fruits. Heliyon 2023; 9:e15573. [PMID: 37128327 PMCID: PMC10148037 DOI: 10.1016/j.heliyon.2023.e15573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 04/05/2023] [Accepted: 04/14/2023] [Indexed: 05/03/2023] Open
Abstract
The regulation of sugar and organic acid metabolism during fruit development has a major effect on high-quality fruit production. The reduction of leaf area is a common feature in plant growth, induced by abiotic and biotic stresses and disturbing source/sink ratio, thus impacting fruit quality. Here, we induced carbohydrate limitation by partial leaf defoliation at the beginning of the second stage of mandarin development (before the citrate peak). Resulting changes were monitored in the short-term (48 h and 1 week) and long-term (7 weeks) after the defoliation. Short-term response to early defoliation implied metabolic settings to re-feed TCA for sustaining respiration rate. These features involved (i) vacuolar sucrose degradation (high acid invertase activity and mRNA expression level) and enhanced glycolytic flux (high ATP-phosphofructokinase activity), (ii) malic and citric acid utilization (increased phosphoenolpyruvate kinase and NADP-Isocitrate dehydrogenase) associated with vacuolar citric acid release (high mRNA expression of the transporter CsCit1) and (iii) stimulation of GABA shunt pathway (low GABA content and increased mRNA expression of succinate semialdehyde dehydrogenase). A steady-state proline level was found in ED fruits although an increase in P5CS mRNA expression level. These results contribute to a better knowledge of the molecular basis of the relationship between defoliation and sugar and organic acid metabolism in mandarin fruit.
Collapse
Affiliation(s)
- Radia Lourkisti
- Unité mixte de recherche (UMR) 6134 Laboratoire Sciences pour l’Environnement (SPE) Centre national de la recherche scientifique (CNRS), Université de Corse, 20250, France
- Corresponding author.
| | - Sandrine Antoine
- Unité mixte de recherche (UMR) 6134 Laboratoire Sciences pour l’Environnement (SPE) Centre national de la recherche scientifique (CNRS), Université de Corse, 20250, France
- UMR AGAP Institut, CIRAD, INRAE, Institut Agro, Université Montpellier, 20230 San Giuliano, France
| | | | - François Luro
- UMR AGAP Institut, CIRAD, INRAE, Institut Agro, Université Montpellier, 20230 San Giuliano, France
| | - Yves Gibon
- UMR 1332 BFP, INRAE, Université de Bordeaux, 33883 Villenave d’Ornon, France
- MetaboHUB, Bordeaux Metabolome, INRAE, Université de Bordeaux, 33140 Villenave d’Ornon, France
| | - Julie Oustric
- Unité mixte de recherche (UMR) 6134 Laboratoire Sciences pour l’Environnement (SPE) Centre national de la recherche scientifique (CNRS), Université de Corse, 20250, France
| | - Jérémie Santini
- Unité mixte de recherche (UMR) 6134 Laboratoire Sciences pour l’Environnement (SPE) Centre national de la recherche scientifique (CNRS), Université de Corse, 20250, France
| | - Liliane Berti
- Unité mixte de recherche (UMR) 6134 Laboratoire Sciences pour l’Environnement (SPE) Centre national de la recherche scientifique (CNRS), Université de Corse, 20250, France
| |
Collapse
|
5
|
Martínez-Peña R, Vergara-Díaz O, Schlereth A, Höhne M, Morcuende R, Nieto-Taladriz MT, Araus JL, Aparicio N, Vicente R. Analysis of durum wheat photosynthetic organs during grain filling reveals the ear as a water stress-tolerant organ and the peduncle as the largest pool of primary metabolites. PLANTA 2023; 257:81. [PMID: 36917306 PMCID: PMC10014764 DOI: 10.1007/s00425-023-04115-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 03/04/2023] [Indexed: 06/18/2023]
Abstract
MAIN CONCLUSION The pool of carbon- and nitrogen-rich metabolites is quantitatively relevant in non-foliar photosynthetic organs during grain filling, which have a better response to water limitation than flag leaves. The response of durum wheat to contrasting water regimes has been extensively studied at leaf and agronomic level in previous studies, but the water stress effects on source-sink dynamics, particularly non-foliar photosynthetic organs, is more limited. Our study aims to investigate the response of different photosynthetic organs to water stress and to quantify the pool of carbon and nitrogen metabolites available for grain filling. Five durum wheat varieties were grown in field trials in the Spanish region of Castile and León under irrigated and rainfed conditions. Water stress led to a significant decrease in yield, biomass, and carbon and nitrogen assimilation, improved water use efficiency, and modified grain quality traits in the five varieties. The pool of carbon (glucose, glucose-6-phosphate, fructose, sucrose, starch, and malate) and nitrogen (glutamate, amino acids, proteins and chlorophylls) metabolites in leaf blades and sheaths, peduncles, awns, glumes and lemmas were also analysed. The results showed that the metabolism of the blades and peduncles was the most susceptible to water stress, while ear metabolism showed higher stability, particularly at mid-grain filling. Interestingly, the total metabolite content per organ highlighted that a large source of nutrients, which may be directly involved in grain filling, are found outside the blades, with the peduncles being quantitatively the most relevant. We conclude that yield improvements in our Mediterranean agro-ecosystem are highly linked to the success of shoots in producing ears and a higher number of grains, while grain filling is highly dependent on the capacity of non-foliar organs to fix CO2 and N. The ear organs show higher stress resilience than other organs, which deserves our attention in future breeding programmes.
Collapse
Affiliation(s)
- Raquel Martínez-Peña
- Cereals Group, Section of Herbaceous, Agro-Technological Institute of Castile and León, Junta de Castile and León, Valladolid, Spain
| | - Omar Vergara-Díaz
- Plant Ecophysiology and Metabolism Group, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Oeiras, Portugal
| | - Armin Schlereth
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Melanie Höhne
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Rosa Morcuende
- Institute of Natural Resources and Agrobiology of Salamanca (IRNASA), Consejo Superior de Investigaciones Científicas (CSIC), Salamanca, Spain
| | - María Teresa Nieto-Taladriz
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - José Luis Araus
- Integrative Crop Ecophysiology Group, Section of Plant Physiology, Faculty of Biology, University of Barcelona, Barcelona, and AGROTECNIO-CERCA Center, Lleida, Spain
| | - Nieves Aparicio
- Cereals Group, Section of Herbaceous, Agro-Technological Institute of Castile and León, Junta de Castile and León, Valladolid, Spain
| | - Rubén Vicente
- Plant Ecophysiology and Metabolism Group, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Oeiras, Portugal.
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany.
| |
Collapse
|
6
|
Kitashova A, Adler SO, Richter AS, Eberlein S, Dziubek D, Klipp E, Nägele T. Limitation of sucrose biosynthesis shapes carbon partitioning during plant cold acclimation. PLANT, CELL & ENVIRONMENT 2023; 46:464-478. [PMID: 36329607 DOI: 10.1111/pce.14483] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/27/2022] [Accepted: 10/31/2022] [Indexed: 06/16/2023]
Abstract
Cold acclimation is a multigenic process by which many plant species increase their freezing tolerance. Stabilization of photosynthesis and carbohydrate metabolism plays a crucial role in cold acclimation. To study regulation of primary and secondary metabolism during cold acclimation of Arabidopsis thaliana, metabolic mutants with deficiencies in either starch or flavonoid metabolism were exposed to 4°C. Photosynthesis was determined together with amounts of carbohydrates, anthocyanins, organic acids and enzyme activities of the central carbohydrate metabolism. Starch deficiency was found to significantly delay soluble sugar accumulation during cold acclimation, while starch overaccumulation did not affect accumulation dynamics but resulted in lower total amounts of \sucrose and glucose. Anthocyanin amounts were lowered in both starch deficient and overaccumulating mutants. Vice versa, flavonoid deficiency did not result in a changed starch amount, which suggested a unidirectional signalling link between starch and flavonoid metabolism. Mathematical modelling of carbon metabolism indicated kinetics of sucrose biosynthesis to be limiting for carbon partitioning in leaf tissue during cold exposure. Together with cold-induced dynamics of citrate, fumarate and malate amounts, this provided evidence for a central role of sucrose phosphate synthase activity in carbon partitioning between biosynthetic and dissimilatory pathways which stabilizes photosynthesis and metabolism at low temperature.
Collapse
Affiliation(s)
- Anastasia Kitashova
- Plant Evolutionary Cell Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Stephan O Adler
- Theoretical Biophysics, Institute of Biology, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Andreas S Richter
- Institute for Biosciences, Physiology of Plant Metabolism, University of Rostock, Rostock, Germany
| | - Svenja Eberlein
- Plant Evolutionary Cell Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Dejan Dziubek
- Plant Evolutionary Cell Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Edda Klipp
- Theoretical Biophysics, Institute of Biology, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Thomas Nägele
- Plant Evolutionary Cell Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| |
Collapse
|
7
|
Huo L, Wang H, Wang Q, Gao Y, Xu K, Sun X. Exogenous treatment with melatonin enhances waterlogging tolerance of kiwifruit plants. FRONTIERS IN PLANT SCIENCE 2022; 13:1081787. [PMID: 36570925 PMCID: PMC9780670 DOI: 10.3389/fpls.2022.1081787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Waterlogging stress has an enormous negative impact on the kiwifruit yield and quality. The protective role of exogenous melatonin on water stress has been widely studied, especially in drought stress. However, the research on melatonin-induced waterlogging tolerance is scarce. Here, we found that treatment with exogenous melatonin could effectively alleviate the damage on kiwifruit plants in response to waterlogging treatment. This was accompanied by higher antioxidant activity and lower ROS accumulation in kiwifruit roots during stress period. The detection of changes in amino acid levels of kiwifruit roots during waterlogging stress showed a possible interaction between melatonin and amino acid metabolism, which promoted the tolerance of kiwifruit plants to waterlogging. The higher levels of GABA and Pro in the roots of melatonin-treated kiwifruit plants partly contributed to their improved waterlogging tolerance. In addition, some plant hormones were also involved in the melatonin-mediated waterlogging tolerance, such as the enhancement of ACC accumulation. This study discussed the melatonin-mediated water stress tolerance of plants from the perspective of amino acid metabolism for the first time.
Collapse
Affiliation(s)
| | | | | | | | - Kai Xu
- *Correspondence: Kai Xu, ; Liuqing Huo,
| | | |
Collapse
|
8
|
Vaitkevičiūtė G, Aleliūnas A, Gibon Y, Armonienė R. The effect of cold acclimation, deacclimation and reacclimation on metabolite profiles and freezing tolerance in winter wheat. FRONTIERS IN PLANT SCIENCE 2022; 13:959118. [PMID: 36046584 PMCID: PMC9421140 DOI: 10.3389/fpls.2022.959118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 07/20/2022] [Indexed: 06/03/2023]
Abstract
Global climate change will cause longer and warmer autumns, thus negatively affecting the quality of cold acclimation (CA) and reducing the freezing tolerance (FT) of winter wheat. Insufficient FT and fluctuating temperatures during winter can accelerate the deacclimation (DEA) process, whereas reacclimation (REA) is possible only while the vernalization requirement is unfulfilled. Six winter wheat genotypes with different winter hardiness profiles were used to evaluate the impact of constant low-temperature (2°C) and prolonged higher low-temperature (28 days at 10°C followed by 2°C until day 49) on shoot biomass and metabolite accumulation patterns in leaf and crown tissues throughout 49 days of CA, 7 days of DEA, and 14 days of REA. The FT of winter wheat was determined as LT30 values by conducting freezing tests after CA, DEA, and REA. Shoot biomass accumulation, projected as the green leaf area (GLA), was investigated by non-destructive RGB imaging-based phenotyping. Dynamics of carbohydrates, hexose phosphates, organic acids, proteins, and amino acids were assessed in leaf and crown tissues. Results revealed that exposure to higher low-temperature induced higher accumulation of shoot biomass and had a negative impact on FT of winter wheat. Prolonged higher low-temperature negatively affected the accumulation of soluble carbohydrates, protein content and amino acids, and had a positive effect on starch accumulation in leaf and crown tissues after CA, in comparison with the constant low-temperature treatment. DEA resulted in significantly reduced FT. Lower concentrations of glucose-6-phosphate, sucrose and proline, as well as higher concentrations of starch in leaves and crowns were found after DEA. The majority of the genotypes regained FT after REA; higher concentrations of glucose and malate in leaves, and sucrose in crown tissue were observed, whereas starch accumulation was decreased in both tissues. Negative correlations were determined between FT and starch concentration in leaves and crowns, while proline and proteins, accumulated in crowns, showed positive correlations with FT. This study broadens the knowledge regarding the effect of different low-temperature regimes on the dynamics of metabolite accumulation in winter wheat throughout CA, DEA, and REA, and its relationship to biomass accumulation and FT.
Collapse
Affiliation(s)
- Gabija Vaitkevičiūtė
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Agriculture, Akademija, Lithuania
| | - Andrius Aleliūnas
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Agriculture, Akademija, Lithuania
| | - Yves Gibon
- Univ. Bordeaux, INRAE, Bordeaux Metabolome, UMR 1332 BFP, Villenave d’Ornon, France
| | - Rita Armonienė
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Agriculture, Akademija, Lithuania
| |
Collapse
|
9
|
Campos NA, Colombié S, Moing A, Cassan C, Amah D, Swennen R, Gibon Y, Carpentier SC. From fruit growth to ripening in plantain: a careful balance between carbohydrate synthesis and breakdown. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:4832-4849. [PMID: 35512676 PMCID: PMC9366326 DOI: 10.1093/jxb/erac187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 05/04/2022] [Indexed: 06/14/2023]
Abstract
In this study, we aimed to investigate for the first time different fruit development stages in plantain banana in order gain insights into the order of appearance and dominance of specific enzymes and fluxes. We examined fruit development in two plantain banana cultivars during the period between 2-12 weeks after bunch emergence using high-throughput proteomics, quantification of major metabolites, and analyses of metabolic fluxes. Starch synthesis and breakdown are processes that take place simultaneously. During the first 10 weeks fruits accumulated up to 48% of their dry weight as starch, and glucose 6-phosphate and fructose were important precursors. We found a unique amyloplast transporter and hypothesize that it facilitates the import of fructose. We identified an invertase originating from the Musa balbisiana genome that would enable carbon flow back to growth and starch synthesis and maintain a high starch content even during ripening. Enzymes associated with the initiation of ripening were involved in ethylene and auxin metabolism, starch breakdown, pulp softening, and ascorbate biosynthesis. The initiation of ripening was cultivar specific, with faster initiation being particularly linked to the 1-aminocyclopropane-1-carboxylate oxidase and 4-alpha glucanotransferase disproportionating enzymes. Information of this kind is fundamental to determining the optimal time for picking the fruit in order to reduce post-harvest losses, and has potential applications for breeding to improve fruit quality.
Collapse
Affiliation(s)
| | - Sophie Colombié
- INRAE, Fruit Biology and Pathology, Université De Bordeaux, UMR 1332, 33140 Villenave d’Ornon, France
| | - Annick Moing
- INRAE, Fruit Biology and Pathology, Université De Bordeaux, UMR 1332, 33140 Villenave d’Ornon, France
| | - Cedric Cassan
- INRAE, Fruit Biology and Pathology, Université De Bordeaux, UMR 1332, 33140 Villenave d’Ornon, France
| | - Delphine Amah
- IITA, Crop Breeding, Ibadan 200001, Oyo State, Nigeria
| | - Rony Swennen
- Biosystems Department, KULeuven, 3001 Leuven, Belgium
- IITA, Crop Breeding, PO Box 7878, Kampala, Uganda
| | - Yves Gibon
- INRAE, Fruit Biology and Pathology, Université De Bordeaux, UMR 1332, 33140 Villenave d’Ornon, France
| | | |
Collapse
|
10
|
Alexandre Moraes T, Mengin V, Peixoto B, Encke B, Krohn N, Höhne M, Krause U, Stitt M. The circadian clock mutant lhy cca1 elf3 paces starch mobilization to dawn despite severely disrupted circadian clock function. PLANT PHYSIOLOGY 2022; 189:2332-2356. [PMID: 35567528 PMCID: PMC9348821 DOI: 10.1093/plphys/kiac226] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 04/22/2022] [Indexed: 06/15/2023]
Abstract
Many plants, including Arabidopsis (Arabidopsis thaliana), accumulate starch in the daytime and remobilize it to support maintenance and growth at night. Starch accumulation is increased when carbon is in short supply, for example, in short photoperiods. Mobilization is paced to exhaust starch around dawn, as anticipated by the circadian clock. This diel pattern of turnover is largely robust against loss of day, dawn, dusk, or evening clock components. Here, we investigated diel starch turnover in the triple circadian clock mutant lhy cca1 elf3, which lacks the LATE ELONGATED HYPOCOTYL and the CIRCADIAN CLOCK-ASSOCIATED1 (CCA1) dawn components and the EARLY FLOWERING3 (ELF3) evening components of the circadian clock. The diel oscillations of transcripts for the remaining clock components and related genes like REVEILLE and PHYTOCHROME-INTERACING FACTOR family members exhibited attenuated amplitudes and altered peak time, weakened dawn dominance, and decreased robustness against changes in the external light-dark cycle. The triple mutant was unable to increase starch accumulation in short photoperiods. However, it was still able to pace starch mobilization to around dawn in different photoperiods and growth irradiances and to around 24 h after the previous dawn in T17 and T28 cycles. The triple mutant was able to slow down starch mobilization after a sudden low-light day or a sudden early dusk, although in the latter case it did not fully compensate for the lengthened night. Overall, there was a slight trend to less linear mobilization of starch. Thus, starch mobilization can be paced rather robustly to dawn despite a major disruption of the transcriptional clock. It is proposed that temporal information can be delivered from clock components or a semi-autonomous oscillator.
Collapse
Affiliation(s)
| | - Virginie Mengin
- School of Life Sciences, University of Essex, Colchester CO4 3SQ, UK
| | - Bruno Peixoto
- Instituto Gulbenkian de Ciência, Oeiras 2780-156,Portugal
- GREEN-IT Bioresources for Sustainability, ITQB NOVA, Oeiras 2780-157,Portugal
| | - Beatrice Encke
- Systematic Botany and Biodiversity, Humboldt University of Berlin, Berlin D-10115, Germany
| | - Nicole Krohn
- Abteilung für Parodontologie und Synoptische Zahnmedizin, Charité Universitätsmedizin, Berlin 14197, Germany
| | - Melanie Höhne
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm 14476, Germany
| | - Ursula Krause
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm 14476, Germany
| | | |
Collapse
|
11
|
Hunziker J, Nishida K, Kondo A, Ariizumi T, Ezura H. Phenotypic Characterization of High Carotenoid Tomato Mutants Generated by the Target-AID Base-Editing Technology. FRONTIERS IN PLANT SCIENCE 2022; 13:848560. [PMID: 35874006 PMCID: PMC9301137 DOI: 10.3389/fpls.2022.848560] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 06/17/2022] [Indexed: 06/15/2023]
Abstract
Our previous study demonstrated that Target-AID which is the modified CRISPR/Cas9 system enabling base-editing is an efficient tool for targeting multiple genes. Three genes, SlDDB1, SlDET1, and SlCYC-B, responsible for carotenoid accumulation were targeted, and allelic variations were previously obtained by Target-AID. In this research, we characterized the effect of new alleles on plant growth and fruit development, as well as carotenoid accumulation, individually in segregating backcross populations or combined in null self-segregant lines. Only lines carrying homozygous substitutions in the three targeted genes and the segregating backcross population of individual mutations were characterized, resulting in the isolation of two allelic versions for SlDDB1, one associated with SlDET1 and the last one with SlCYC-B. All edited lines showed variations in carotenoid accumulation, with an additive effect for each single mutation. These results suggest that Target-AID base-editing technology is an effective tool for creating new allelic variations in target genes to improve carotenoid accumulation in tomato.
Collapse
Affiliation(s)
- Johan Hunziker
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Keiji Nishida
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Akihiko Kondo
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Tohru Ariizumi
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
- Tsukuba Plant Innovation Research Center, University of Tsukuba, Tsukuba, Japan
| | - Hiroshi Ezura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
- Tsukuba Plant Innovation Research Center, University of Tsukuba, Tsukuba, Japan
| |
Collapse
|
12
|
Luzarowski M, Vicente R, Kiselev A, Wagner M, Schlossarek D, Erban A, de Souza LP, Childs D, Wojciechowska I, Luzarowska U, Górka M, Sokołowska EM, Kosmacz M, Moreno JC, Brzezińska A, Vegesna B, Kopka J, Fernie AR, Willmitzer L, Ewald JC, Skirycz A. Global mapping of protein-metabolite interactions in Saccharomyces cerevisiae reveals that Ser-Leu dipeptide regulates phosphoglycerate kinase activity. Commun Biol 2021; 4:181. [PMID: 33568709 PMCID: PMC7876005 DOI: 10.1038/s42003-021-01684-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 01/08/2021] [Indexed: 01/30/2023] Open
Abstract
Protein-metabolite interactions are of crucial importance for all cellular processes but remain understudied. Here, we applied a biochemical approach named PROMIS, to address the complexity of the protein-small molecule interactome in the model yeast Saccharomyces cerevisiae. By doing so, we provide a unique dataset, which can be queried for interactions between 74 small molecules and 3982 proteins using a user-friendly interface available at https://promis.mpimp-golm.mpg.de/yeastpmi/ . By interpolating PROMIS with the list of predicted protein-metabolite interactions, we provided experimental validation for 225 binding events. Remarkably, of the 74 small molecules co-eluting with proteins, 36 were proteogenic dipeptides. Targeted analysis of a representative dipeptide, Ser-Leu, revealed numerous protein interactors comprising chaperones, proteasomal subunits, and metabolic enzymes. We could further demonstrate that Ser-Leu binding increases activity of a glycolytic enzyme phosphoglycerate kinase (Pgk1). Consistent with the binding analysis, Ser-Leu supplementation leads to the acute metabolic changes and delays timing of a diauxic shift. Supported by the dipeptide accumulation analysis our work attests to the role of Ser-Leu as a metabolic regulator at the interface of protein degradation and central metabolism.
Collapse
Affiliation(s)
- Marcin Luzarowski
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Rubén Vicente
- grid.418390.70000 0004 0491 976XDepartment of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Andrei Kiselev
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany ,grid.503344.50000 0004 0445 6769Laboratoire de Recherche en Sciences Végétales (LRSV), UPS/CNRS, UMR, Castanet Tolosan, France
| | - Mateusz Wagner
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany ,grid.8505.80000 0001 1010 5103University of Wrocław, Faculty of Biotechnology, Laboratory of Medical Biology, Wrocław, Poland
| | - Dennis Schlossarek
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Alexander Erban
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Leonardo Perez de Souza
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Dorothee Childs
- grid.4709.a0000 0004 0495 846XDepartment of Genome Biology, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Izabela Wojciechowska
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Urszula Luzarowska
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany ,grid.7489.20000 0004 1937 0511Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Michał Górka
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Ewelina M. Sokołowska
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Monika Kosmacz
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany ,grid.45672.320000 0001 1926 5090Center for Desert Agriculture, Biological and Environmental Science and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Juan C. Moreno
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany ,grid.45672.320000 0001 1926 5090Center for Desert Agriculture, Biological and Environmental Science and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Aleksandra Brzezińska
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Bhavana Vegesna
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Joachim Kopka
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Alisdair R. Fernie
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Lothar Willmitzer
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Jennifer C. Ewald
- grid.10392.390000 0001 2190 1447Interfaculty Institute of Cell Biology, Eberhard Karls University of Tuebingen, Tuebingen, Germany
| | - Aleksandra Skirycz
- grid.418390.70000 0004 0491 976XDepartment of Molecular Physiology, Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany ,grid.5386.8000000041936877XBoyce Thompson Institute, Ithaca, NY USA
| |
Collapse
|
13
|
Kitashova A, Schneider K, Fürtauer L, Schröder L, Scheibenbogen T, Fürtauer S, Nägele T. Impaired chloroplast positioning affects photosynthetic capacity and regulation of the central carbohydrate metabolism during cold acclimation. PHOTOSYNTHESIS RESEARCH 2021; 147:49-60. [PMID: 33211260 PMCID: PMC7728637 DOI: 10.1007/s11120-020-00795-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 11/06/2020] [Indexed: 05/02/2023]
Abstract
Photosynthesis and carbohydrate metabolism of higher plants need to be tightly regulated to prevent tissue damage during environmental changes. The intracellular position of chloroplasts changes due to a changing light regime. Chloroplast avoidance and accumulation response under high and low light, respectively, are well known phenomena, and deficiency of chloroplast movement has been shown to result in photodamage and reduced biomass accumulation. Yet, effects of chloroplast positioning on underlying metabolic regulation are less well understood. Here, we analysed photosynthesis together with metabolites and enzyme activities of the central carbohydrate metabolism during cold acclimation of the chloroplast unusual positioning 1 (chup1) mutant of Arabidopsis thaliana. We compared cold acclimation under ambient and low light and found that maximum quantum yield of PSII was significantly lower in chup1 than in Col-0 under both conditions. Our findings indicated that net CO2 assimilation in chup1 is rather limited by biochemistry than by photochemistry. Further, cold-induced dynamics of sucrose phosphate synthase differed significantly between both genotypes. Together with a reduced rate of sucrose cycling derived from kinetic model simulations our study provides evidence for a central role of chloroplast positioning for photosynthetic and metabolic acclimation to low temperature.
Collapse
Affiliation(s)
- Anastasia Kitashova
- Department Biology I, Plant Evolutionary Cell Biology, LMU München, 82152, Planegg-Martinsried, Germany
| | - Katja Schneider
- Department Biology I, Plant Development, LMU München, 82152, Planegg-Martinsried, Germany
| | - Lisa Fürtauer
- Department Biology I, Plant Evolutionary Cell Biology, LMU München, 82152, Planegg-Martinsried, Germany
| | - Laura Schröder
- Department Biology I, Plant Evolutionary Cell Biology, LMU München, 82152, Planegg-Martinsried, Germany
| | - Tim Scheibenbogen
- Department Biology I, Plant Evolutionary Cell Biology, LMU München, 82152, Planegg-Martinsried, Germany
| | - Siegfried Fürtauer
- Department Biology I, Plant Evolutionary Cell Biology, LMU München, 82152, Planegg-Martinsried, Germany
- Fraunhofer Institute for Process Engineering and Packaging IVV, 85354, Freising, Germany
| | - Thomas Nägele
- Department Biology I, Plant Evolutionary Cell Biology, LMU München, 82152, Planegg-Martinsried, Germany.
| |
Collapse
|
14
|
Ponnu J, Schlereth A, Zacharaki V, Działo MA, Abel C, Feil R, Schmid M, Wahl V. The trehalose 6-phosphate pathway impacts vegetative phase change in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 104:768-780. [PMID: 32799402 DOI: 10.1111/tpj.14965] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/12/2020] [Accepted: 07/13/2020] [Indexed: 05/16/2023]
Abstract
The vegetative phase change marks the beginning of the adult phase in the life cycle of plants and is associated with a gradual decline in the microRNA miR156, in response to sucrose status. Trehalose 6-phosphate (T6P) is a sugar molecule with signaling function reporting the current sucrose state. To elucidate the role of T6P signaling in vegetative phase change, molecular, genetic, and metabolic analyses were performed using Arabidopsis thaliana loss-of-function lines in TREHALOSE PHOSPHATE SYNTHASE1 (TPS1), a gene coding for an enzyme that catalyzes the production of T6P. These lines show a significant delay in vegetative phase change, under both short and long day conditions. Induced expression of TPS1 complements this delay in the TPS1 knockout mutant (tps1-2 GVG::TPS1). Further analyses indicate that the T6P pathway promotes vegetative phase transition by suppressing miR156 expression and thereby modulating the levels of its target transcripts, the SQUAMOSA PROMOTER BINDING PROTEIN-LIKE genes. TPS1 knockdown plants, with a delayed vegetative phase change phenotype, accumulate significantly more sucrose than wild-type plants as a result of a feedback mechanism. In summary, we conclude that the T6P pathway forms an integral part of an endogenous mechanism that influences phase transitions dependent on the metabolic state.
Collapse
Affiliation(s)
- Jathish Ponnu
- Department of Molecular Biology, Max Planck Institute for Developmental Biology, Spemannstraße 35, Tübingen, 72076, Germany
| | - Armin Schlereth
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | | | - Magdalena A Działo
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | - Christin Abel
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | - Regina Feil
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | - Markus Schmid
- Department of Molecular Biology, Max Planck Institute for Developmental Biology, Spemannstraße 35, Tübingen, 72076, Germany
| | - Vanessa Wahl
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| |
Collapse
|
15
|
Jammer A, Albacete A, Schulz B, Koch W, Weltmeier F, van der Graaff E, Pfeifhofer HW, Roitsch TG. Early-stage sugar beet taproot development is characterized by three distinct physiological phases. PLANT DIRECT 2020; 4:e00221. [PMID: 32766510 PMCID: PMC7395582 DOI: 10.1002/pld3.221] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 02/04/2020] [Accepted: 04/13/2020] [Indexed: 05/21/2023]
Abstract
Despite the agronomic importance of sugar beet (Beta vulgaris L.), the early-stage development of its taproot has only been poorly investigated. Thus, the mechanisms that determine growth and sugar accumulation in sugar beet are largely unknown. In the presented study, a physiological characterization of early-stage sugar beet taproot development was conducted. Activities were analyzed for fourteen key enzymes of carbohydrate metabolism in developing taproots over the first 80 days after sowing. In addition, we performed in situ localizations of selected carbohydrate-metabolic enzyme activities, anatomical investigations, and quantifications of soluble carbohydrates, hexose phosphates, and phytohormones. Based on the accumulation dynamics of biomass and sucrose, as well as on anatomical parameters, the early phase of taproot development could be subdivided into three stages-prestorage, transition, secondary growth and sucrose accumulation stage-each of which was characterized by distinct metabolic and phytohormonal signatures. The enzyme activity signatures corresponding to these stages were also shown to be robustly reproducible in experiments conducted in two additional locations. The results from this physiological phenotyping approach contribute to the identification of the key regulators of sugar beet taproot development and open up new perspectives for sugar beet crop improvement concerning both physiological marker-based breeding and biotechnological approaches.
Collapse
Affiliation(s)
- Alexandra Jammer
- Institute of BiologyUniversity of GrazGrazAustria
- Department of Crop SciencesUFT TullnUniversity of Natural Resources and Life Sciences (BOKU)TullnAustria
| | - Alfonso Albacete
- Institute of BiologyUniversity of GrazGrazAustria
- Present address:
Department of Plant Production and AgrotechnologyInstitute for Agri‐Food Research and Development of Murcia (IMIDA)MurciaSpain
| | | | | | | | - Eric van der Graaff
- Institute of BiologyUniversity of GrazGrazAustria
- Department of Plant and Environmental SciencesCopenhagen Plant Science CentreUniversity of CopenhagenTaastrupDenmark
- Present address:
Koppert Cress B.V.MonsterThe Netherlands
| | | | - Thomas G. Roitsch
- Department of Crop SciencesUFT TullnUniversity of Natural Resources and Life Sciences (BOKU)TullnAustria
- Department of Plant and Environmental SciencesCopenhagen Plant Science CentreUniversity of CopenhagenTaastrupDenmark
- Department of Adaptive BiotechnologiesGlobal Change Research Institute CASBrnoCzech Republic
| |
Collapse
|
16
|
Indications for a Central Role of Hexokinase Activity in Natural Variation of Heat Acclimation in Arabidopsis thaliana. PLANTS 2020; 9:plants9070819. [PMID: 32610673 PMCID: PMC7411702 DOI: 10.3390/plants9070819] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 06/24/2020] [Accepted: 06/26/2020] [Indexed: 01/06/2023]
Abstract
Diurnal and seasonal changes of abiotic environmental factors shape plant performance and distribution. Changes of growth temperature and light intensity may vary significantly on a diurnal, but also on a weekly or seasonal scale. Hence, acclimation to a changing temperature and light regime is essential for plant survival and propagation. In the present study, we analyzed photosynthetic CO2 assimilation and metabolic regulation of the central carbohydrate metabolism in two natural accessions of Arabidopsis thaliana that originate from north western Russia and south Italy during exposure to heat and a combination of heat and high light. Our findings indicate that it is hardly possible to predict photosynthetic capacities under combined stress from single stress experiments. Further, capacities of hexose phosphorylation were found to be significantly lower in the Italian than in the Russian accession, which could explain an inverted sucrose-to-hexose ratio. Together with the finding of significantly stronger accumulation of anthocyanins under heat/high light, these observations indicate a central role of hexokinase activity in the stabilization of photosynthesis and carbohydrate metabolism during environmental changes.
Collapse
|
17
|
Colanic acid biosynthesis in Escherichia coli is dependent on lipopolysaccharide structure and glucose availability. Microbiol Res 2020; 239:126527. [PMID: 32590169 DOI: 10.1016/j.micres.2020.126527] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 06/06/2020] [Accepted: 06/06/2020] [Indexed: 01/31/2023]
Abstract
Lipopolysaccharide and colanic acid are important forms of exopolysaccharides located on the cell surface of Escherichia coli, but their interrelation with the cell stress response is not well understood. In this study, nine mutant strains with different structures of lipopolysaccharide were constructed from E. coli MG1655 by deletion of a single gene or multiple genes. All mutant strains did not produce colanic acid when grown in LB medium, but six of them could produce colanic acid when grown either in M9 medium in which glucose is the sole carbon source or in LB medium supplemented with glucose. The results indicate that colanic acid production in E. coli is dependent on both lipopolysaccharide structure and glucose availability. However, transcriptional analysis showed that 20 genes related to the colanic acid biosynthesis and the key gene rcsA in the Rcs system were all transcriptionally up-regulated in all of the nine mutant strains no matter they were grown in M9 or LB medium. This suggests that the availability of some nucleotide-sugar precursors shared by the biosynthesis of lipopolysaccharide and colanic acid might play a major role in colanic acid production in E. coli. Lipopolysaccharide pathway might have a huge priority to colanic acid pathway to use the common precursors; therefore, the colanic acid is not produced in MG1655 and the nine mutants when grown in LB medium. In the six mutant strains that can produce colanic acid in the glucose rich media, the common precursors might be abundant because they were not needed for synthesizing the mutant lipopolysaccharide.
Collapse
|
18
|
Luna E, Flandin A, Cassan C, Prigent S, Chevanne C, Kadiri CF, Gibon Y, Pétriacq P. Metabolomics to Exploit the Primed Immune System of Tomato Fruit. Metabolites 2020; 10:metabo10030096. [PMID: 32155921 PMCID: PMC7143431 DOI: 10.3390/metabo10030096] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/03/2020] [Accepted: 03/03/2020] [Indexed: 12/25/2022] Open
Abstract
Tomato is a major crop suffering substantial yield losses from diseases, as fruit decay at a postharvest level can claim up to 50% of the total production worldwide. Due to the environmental risks of fungicides, there is an increasing interest in exploiting plant immunity through priming, which is an adaptive strategy that improves plant defensive capacity by stimulating induced mechanisms. Broad-spectrum defence priming can be triggered by the compound ß-aminobutyric acid (BABA). In tomato plants, BABA induces resistance against various fungal and bacterial pathogens and different methods of application result in durable protection. Here, we demonstrate that the treatment of tomato plants with BABA resulted in a durable induced resistance in tomato fruit against Botrytis cinerea, Phytophthora infestans and Pseudomonas syringae. Targeted and untargeted metabolomics were used to investigate the metabolic regulations that underpin the priming of tomato fruit against pathogenic microbes that present different infection strategies. Metabolomic analyses revealed major changes after BABA treatment and after inoculation. Remarkably, primed responses seemed specific to the type of infection, rather than showing a common fingerprint of BABA-induced priming. Furthermore, top-down modelling from the detected metabolic markers allowed for the accurate prediction of the measured resistance to fruit pathogens and demonstrated that soluble sugars are essential to predict resistance to fruit pathogens. Altogether, our results demonstrate that metabolomics is particularly insightful for a better understanding of defence priming in fruit. Further experiments are underway in order to identify key metabolites that mediate broad-spectrum BABA-induced priming in tomato fruit.
Collapse
Affiliation(s)
- Estrella Luna
- School of Biosciences, Uni. Birmingham, Birmingham B15 2TT, UK
| | - Amélie Flandin
- UMR BFP, University Bordeaux, INRAE, 33882 Villenave d’Ornon, France
- Bordeaux Metabolome, MetaboHUB, PHENOME-EMPHASIS, 33140 Villenave d’Ornon, France
| | - Cédric Cassan
- UMR BFP, University Bordeaux, INRAE, 33882 Villenave d’Ornon, France
- Bordeaux Metabolome, MetaboHUB, PHENOME-EMPHASIS, 33140 Villenave d’Ornon, France
| | - Sylvain Prigent
- UMR BFP, University Bordeaux, INRAE, 33882 Villenave d’Ornon, France
- Bordeaux Metabolome, MetaboHUB, PHENOME-EMPHASIS, 33140 Villenave d’Ornon, France
| | - Chloé Chevanne
- UMR BFP, University Bordeaux, INRAE, 33882 Villenave d’Ornon, France
| | | | - Yves Gibon
- UMR BFP, University Bordeaux, INRAE, 33882 Villenave d’Ornon, France
- Bordeaux Metabolome, MetaboHUB, PHENOME-EMPHASIS, 33140 Villenave d’Ornon, France
| | - Pierre Pétriacq
- UMR BFP, University Bordeaux, INRAE, 33882 Villenave d’Ornon, France
- Bordeaux Metabolome, MetaboHUB, PHENOME-EMPHASIS, 33140 Villenave d’Ornon, France
- Correspondence:
| |
Collapse
|
19
|
Hwang SK, Koper K, Okita TW. The plastid phosphorylase as a multiple-role player in plant metabolism. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 290:110303. [PMID: 31779913 DOI: 10.1016/j.plantsci.2019.110303] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 10/04/2019] [Accepted: 10/07/2019] [Indexed: 05/11/2023]
Abstract
The physiological roles of the plastidial phosphorylase in starch metabolism of higher plants have been debated for decades. While estimated physiological substrate levels favor a degradative role, genetic evidence indicates that the plastidial phosphorylase (Pho1) plays an essential role in starch initiation and maturation of the starch granule in developing rice grains. The plastidial enzyme contains a unique peptide domain, up to 82 residues in length depending on the plant species, not found in its cytosolic counterpart or glycogen phosphorylases. The role of this extra peptide domain is perplexing, as its complete removal does not significantly affect the in vitro catalytic or enzymatic regulatory properties of rice Pho1. This peptide domain may have a regulatory function as it contains potential phosphorylation sites and, in some plant Pho1s, a PEST motif, a substrate for proteasome-mediated degradation. We discuss the potential roles of Pho1 and its L80 domain in starch biosynthesis and photosynthesis.
Collapse
Affiliation(s)
- Seon-Kap Hwang
- Institute of Biological Chemistry, Washington State University, Pullman, WA, 99164, USA
| | - Kaan Koper
- Institute of Biological Chemistry, Washington State University, Pullman, WA, 99164, USA
| | - Thomas W Okita
- Institute of Biological Chemistry, Washington State University, Pullman, WA, 99164, USA.
| |
Collapse
|
20
|
Primo C, Pizzio GA, Yang J, Gaxiola RA, Scholz-Starke J, Hirschi KD. Plant proton pumping pyrophosphatase: the potential for its pyrophosphate synthesis activity to modulate plant growth. PLANT BIOLOGY (STUTTGART, GERMANY) 2019; 21:989-996. [PMID: 31081197 DOI: 10.1111/plb.13007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 05/09/2019] [Indexed: 05/25/2023]
Abstract
Cellular pyrophosphate (PPi) homeostasis is vital for normal plant growth and development. Plant proton-pumping pyrophosphatases (H+ -PPases) are enzymes with different tissue-specific functions related to the regulation of PPi homeostasis. Enhanced expression of plant H+ -PPases increases biomass and yield in different crop species. Here, we emphasise emerging studies utilising heterologous expression in yeast and plant vacuole electrophysiology approaches, as well as phylogenetic relationships and structural analysis, to showcase that the H+ -PPases possess a PPi synthesis function. We postulate this synthase activity contributes to modulating and promoting plant growth both in H+ -PPase-engineered crops and in wild-type plants. We propose a model where the PPi synthase activity of H+ -PPases maintains the PPi pool when cells adopt PPi-dependent glycolysis during high energy demands and/or low oxygen environments. We conclude by proposing experiments to further investigate the H+ -PPase-mediated PPi synthase role in plant growth.
Collapse
Affiliation(s)
- C Primo
- Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX, USA
| | - G A Pizzio
- Center for Research in Agricultural Genomics, Consejo Superior de Investigaciones Científicas, Barcelona, Spain
| | - J Yang
- Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX, USA
| | - R A Gaxiola
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - J Scholz-Starke
- Institute of Biophysics, Consiglio Nazionale delle Ricerche, Genova, Italy
| | - K D Hirschi
- Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX, USA
| |
Collapse
|
21
|
Borghi GL, Moraes TA, Günther M, Feil R, Mengin V, Lunn JE, Stitt M, Arrivault S. Relationship between irradiance and levels of Calvin-Benson cycle and other intermediates in the model eudicot Arabidopsis and the model monocot rice. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:5809-5825. [PMID: 31353406 PMCID: PMC6812724 DOI: 10.1093/jxb/erz346] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 07/22/2019] [Indexed: 05/02/2023]
Abstract
Metabolite profiles provide a top-down overview of the balance between the reactions in a pathway. We compared Calvin-Benson cycle (CBC) intermediate profiles in different conditions in Arabidopsis (Arabidopsis thaliana) and rice (Oryza sativa) to learn which features of CBC regulation differ and which are shared between these model eudicot and monocot C3 species. Principal component analysis revealed that CBC intermediate profiles follow different trajectories in Arabidopsis and rice as irradiance increases. The balance between subprocesses or reactions differed, with 3-phosphoglycerate reduction being favoured in Arabidopsis and ribulose 1,5-bisphosphate regeneration in rice, and sedoheptulose-1,7-bisphosphatase being favoured in Arabidopsis compared with fructose-1,6-bisphosphatase in rice. Photosynthesis rates rose in parallel with ribulose 1,5-bisphosphate levels in Arabidopsis, but not in rice. Nevertheless, some responses were shared between Arabidopsis and rice. Fructose 1,6-bisphosphate and sedoheptulose-1,7-bisphosphate were high or peaked at very low irradiance in both species. Incomplete activation of fructose-1,6-bisphosphatase and sedoheptulose-1,7-bisphosphatase may prevent wasteful futile cycles in low irradiance. End-product synthesis is inhibited and high levels of CBC intermediates are maintained in low light or in low CO2 in both species. This may improve photosynthetic efficiency in fluctuating irradiance, and facilitate rapid CBC flux to support photorespiration and energy dissipation in low CO2.
Collapse
Affiliation(s)
- Gian Luca Borghi
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | | | - Manuela Günther
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Regina Feil
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Virginie Mengin
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - John E Lunn
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Mark Stitt
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Stéphanie Arrivault
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
- Correspondence:
| |
Collapse
|
22
|
Wu B, Ruan C, Han P, Ruan D, Xiong C, Ding J, Liu S. Comparative transcriptomic analysis of high- and low-oil Camellia oleifera reveals a coordinated mechanism for the regulation of upstream and downstream multigenes for high oleic acid accumulation. 3 Biotech 2019; 9:257. [PMID: 31192082 DOI: 10.1007/s13205-019-1792-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 06/03/2019] [Indexed: 01/08/2023] Open
Abstract
Tea oil camellia (Camellia oleifera) is an important woody oil tree in southern China. However, little is known regarding the molecular mechanisms that contribute to high oleic acid accumulation in tea oil camellia. Herein, we measured the oil content and fatty acid compositions of high- and low-oil tea oil camellia seeds and investigated the global gene expression profiles by RNA-seq. The results showed that at the early, second and third seed developmental stages, a total of 64, 253, and 124 genes, respectively, were significantly differentially expressed between the high- and low-oil cultivars. Gene ontology (GO) enrichment analysis of the identified differentially expressed transcription factors (TFs; ABI3, FUS3, LEC1, WRI1, TTG2 and DOF4.6) revealed some critical GO terms associated with oil biosynthesis and fatty acid accumulation, including glycolysis, zinc ion binding, positive regulation of fatty acid biosynthetic process, triglyceride biosynthetic process, seed coat development, abscisic acid-mediated signaling pathway and embryo development. Comprehensive comparisons of transcriptomic profiles and expression analysis of multigenes based on qRT-PCR showed that coordinated high expression of the upstream genes HAD, EAR and KASI directly increased the relative levels of C16:0-ACP, which provided enough precursor resources for oleic acid biosynthesis. Continuous high expression of the SAD gene accelerated oleic acid synthesis and accumulation, and coordinated low expression of the downstream genes FAD2, FAD3, FAD7, FAD8 and FAE1 decreased the consumption of oleic acid for conversion. The coordinated regulation of these multigenes ensures the high accumulation of oleic acid in the seeds of tea oil camellia. Our data represent a comprehensive transcriptomic study of high- and low-oil tea oil camellia, not only increasing the number of sequences associated with lipid biosynthesis and fatty acid accumulation in public resource databases but also providing a scientific basis for genetic improvement of the oleic acid content in woody oil trees.
Collapse
|
23
|
Zhang J, Wu S, Boehlein SK, McCarty DR, Song G, Walley JW, Myers A, Settles AM. Maize defective kernel5 is a bacterial TamB homologue required for chloroplast envelope biogenesis. J Cell Biol 2019; 218:2638-2658. [PMID: 31235479 PMCID: PMC6683743 DOI: 10.1083/jcb.201807166] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 05/07/2019] [Accepted: 06/04/2019] [Indexed: 01/10/2023] Open
Abstract
Zhang et al. show that the maize dek5 locus is required for chloroplast envelope biogenesis and encodes a TamB-like protein. Bacterial TamB proteins facilitate insertion of β-barrel outer membrane proteins, indicating plastids have a conserved mechanism for envelope membrane biogenesis. Chloroplasts are of prokaryotic origin with a double-membrane envelope separating plastid metabolism from the cytosol. Envelope membrane proteins integrate chloroplasts with the cell, but envelope biogenesis mechanisms remain elusive. We show that maize defective kernel5 (dek5) is critical for envelope biogenesis. Amyloplasts and chloroplasts are larger and reduced in number in dek5 with multiple ultrastructural defects. The DEK5 protein is homologous to rice SSG4, Arabidopsis thaliana EMB2410/TIC236, and Escherichia coli tamB. TamB functions in bacterial outer membrane biogenesis. DEK5 is localized to the envelope with a topology analogous to TamB. Increased levels of soluble sugars in dek5 developing endosperm and elevated osmotic pressure in mutant leaf cells suggest defective intracellular solute transport. Proteomics and antibody-based analyses show dek5 reduces levels of Toc75 and chloroplast envelope transporters. Moreover, dek5 chloroplasts reduce inorganic phosphate uptake with at least an 80% reduction relative to normal chloroplasts. These data suggest that DEK5 functions in plastid envelope biogenesis to enable transport of metabolites and proteins.
Collapse
Affiliation(s)
- Junya Zhang
- Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL
| | - Shan Wu
- Horticultural Sciences Department, University of Florida, Gainesville, FL
| | - Susan K Boehlein
- Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL.,Horticultural Sciences Department, University of Florida, Gainesville, FL
| | - Donald R McCarty
- Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL.,Horticultural Sciences Department, University of Florida, Gainesville, FL
| | - Gaoyuan Song
- Plant Pathology and Microbiology, Iowa State University, Ames, IA
| | - Justin W Walley
- Plant Pathology and Microbiology, Iowa State University, Ames, IA
| | - Alan Myers
- Roy J. Carver Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA
| | - A Mark Settles
- Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL .,Horticultural Sciences Department, University of Florida, Gainesville, FL
| |
Collapse
|
24
|
Fernandez O, Urrutia M, Berton T, Bernillon S, Deborde C, Jacob D, Maucourt M, Maury P, Duruflé H, Gibon Y, Langlade NB, Moing A. Metabolomic characterization of sunflower leaf allows discriminating genotype groups or stress levels with a minimal set of metabolic markers. Metabolomics 2019; 15:56. [PMID: 30929085 PMCID: PMC6441456 DOI: 10.1007/s11306-019-1515-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 03/18/2019] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Plant and crop metabolomic analyses may be used to study metabolism across genetic and environmental diversity. Complementary analytical strategies are useful for investigating metabolic changes and searching for biomarkers of response or performance. METHODS AND OBJECTIVES The experimental material consisted in eight sunflower lines with two line status, four restorers (R, used as males) and four maintainers (B, corresponding to females) routinely used for sunflower hybrid varietal production, respectively to complement or maintain the cytoplasmic male sterility PET1. These lines were either irrigated at full soil capacity (WW) or submitted to drought stress (DS). Our aim was to combine targeted and non-targeted metabolomics to characterize sunflower leaf composition in order to investigate the effect of line status genotypes and environmental conditions and to find the best and smallest set of biomarkers for line status and stress response using a custom-made process of variables selection. RESULTS Five hundred and eighty-eight metabolic variables were measured by using complementary analytical methods such as 1H-NMR, MS-based profiles and targeted analyses of major metabolites. Based on statistical analyses, a limited number of markers were able to separate WW and DS samples in a more discriminant manner than previously published physiological data. Another metabolic marker set was able to discriminate line status. CONCLUSION This study underlines the potential of metabolic markers for discriminating genotype groups and environmental conditions. Their potential use for prediction is discussed.
Collapse
Affiliation(s)
- Olivier Fernandez
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- Present Address: Laboratoire RIBP, Université de Reims Champagne Ardenne, Moulin de la Housse Chemin des Rouliers, 51100 Reims, France
| | - Maria Urrutia
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- UMR AgroImpact, INRA, Estrées-Mons, 80203 Péronne, France
- Present Address: Enza Zaden Centro de Investigacion S.L., Santa Maria del Aguila, 04710 Almeria, Spain
| | - Thierry Berton
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- Present Address: Centre for CardioVascular and Nutrition, UMR INRA-INSERM, Aix-Marseille Univ, INSERM, 13005 Marseilles, France
| | - Stéphane Bernillon
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux, CGFB, MetaboHUB-PHENOME, 33140 Villenave d’Ornon, France
| | - Catherine Deborde
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux, CGFB, MetaboHUB-PHENOME, 33140 Villenave d’Ornon, France
| | - Daniel Jacob
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux, CGFB, MetaboHUB-PHENOME, 33140 Villenave d’Ornon, France
| | - Mickaël Maucourt
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux, CGFB, MetaboHUB-PHENOME, 33140 Villenave d’Ornon, France
- Present Address: Enza Zaden Centro de Investigacion S.L., Santa Maria del Aguila, 04710 Almeria, Spain
| | - Pierre Maury
- UMR LIPM, INRA, CNRS, Université de Toulouse, 31326 Castanet-Tolosan, France
| | - Harold Duruflé
- UMR LIPM, INRA, CNRS, Université de Toulouse, 31326 Castanet-Tolosan, France
| | - Yves Gibon
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux, CGFB, MetaboHUB-PHENOME, 33140 Villenave d’Ornon, France
| | - Nicolas B. Langlade
- UMR LIPM, INRA, CNRS, Université de Toulouse, 31326 Castanet-Tolosan, France
| | - Annick Moing
- UMR1332 Biologie du Fruit et Pathologie, INRA, Centre INRA de Bordeaux, 71 av Edouard Bourlaux, 33140 Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux, CGFB, MetaboHUB-PHENOME, 33140 Villenave d’Ornon, France
| |
Collapse
|
25
|
Arrivault S, Alexandre Moraes T, Obata T, Medeiros DB, Fernie AR, Boulouis A, Ludwig M, Lunn JE, Borghi GL, Schlereth A, Guenther M, Stitt M. Metabolite profiles reveal interspecific variation in operation of the Calvin-Benson cycle in both C4 and C3 plants. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:1843-1858. [PMID: 30773587 PMCID: PMC6436152 DOI: 10.1093/jxb/erz051] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 01/29/2019] [Indexed: 05/18/2023]
Abstract
Low atmospheric CO2 in recent geological time led to the evolution of carbon-concentrating mechanisms (CCMs) such as C4 photosynthesis in >65 terrestrial plant lineages. We know little about the impact of low CO2 on the Calvin-Benson cycle (CBC) in C3 species that did not evolve CCMs, representing >90% of terrestrial plant species. Metabolite profiling provides a top-down strategy to investigate the operational balance in a pathway. We profiled CBC intermediates in a panel of C4 (Zea mays, Setaria viridis, Flaveria bidentis, and F. trinervia) and C3 species (Oryza sativa, Triticium aestivum, Arabidopsis thaliana, Nicotiana tabacum, and Manihot esculenta). Principal component analysis revealed differences between C4 and C3 species that were driven by many metabolites, including lower ribulose 1,5-bisphosphate in C4 species. Strikingly, there was also considerable variation between C3 species. This was partly due to different chlorophyll and protein contents, but mainly to differences in relative levels of metabolites. Correlation analysis indicated that one contributory factor was the balance between fructose-1,6-bisphosphatase, sedoheptulose-1,7-bisphosphatase, phosphoribulokinase, and Rubisco. Our results point to the CBC having experienced different evolutionary trajectories in C3 species since the ancestors of modern plant lineages diverged. They underline the need to understand CBC operation in a wide range of species.
Collapse
Affiliation(s)
- Stéphanie Arrivault
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
| | | | - Toshihiro Obata
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
- Present address: Department of Biochemistry, Center for Plant Science Innovation, University of Nebraska-Lincoln, 1901 Vine Str, Lincoln, NE 68588, USA
| | - David B Medeiros
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
| | - Alix Boulouis
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
- Present address: Institut de Biologie Physico-Chimique, CNRS - Sorbonne Université, Paris, France
| | - Martha Ludwig
- School of Molecular Sciences, The University of Western Australia, Crawley WA, Australia
| | - John E Lunn
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
| | - Gian Luca Borghi
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
| | - Armin Schlereth
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
| | - Manuela Guenther
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
| | - Mark Stitt
- Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg, Potsdam-Golm, Germany
- Correspondence:
| |
Collapse
|
26
|
Zhang P, Georgiou CA, Brusic V. Elemental metabolomics. Brief Bioinform 2019; 19:524-536. [PMID: 28077402 DOI: 10.1093/bib/bbw131] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 11/24/2016] [Indexed: 12/14/2022] Open
Abstract
Elemental metabolomics is quantification and characterization of total concentration of chemical elements in biological samples and monitoring of their changes. Recent advances in inductively coupled plasma mass spectrometry have enabled simultaneous measurement of concentrations of > 70 elements in biological samples. In living organisms, elements interact and compete with each other for absorption and molecular interactions. They also interact with proteins and nucleotide sequences. These interactions modulate enzymatic activities and are critical for many molecular and cellular functions. Testing for concentration of > 40 elements in blood, other bodily fluids and tissues is now in routine use in advanced medical laboratories. In this article, we define the basic concepts of elemental metabolomics, summarize standards and workflows, and propose minimum information for reporting the results of an elemental metabolomics experiment. Major statistical and informatics tools for elemental metabolomics are reviewed, and examples of applications are discussed. Elemental metabolomics is emerging as an important new technology with applications in medical diagnostics, nutrition, agriculture, food science, environmental science and multiplicity of other areas.
Collapse
Affiliation(s)
- Ping Zhang
- Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD Australia
| | - Constantinos A Georgiou
- Chemistry Laboratory, Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, Greece
| | - Vladimir Brusic
- Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD Australia.,School of Medicine and Bioinformatics Center, Nazarbayev University, Astana, Kazakhstan
| |
Collapse
|
27
|
Küstner L, Nägele T, Heyer AG. Mathematical modeling of diurnal patterns of carbon allocation to shoot and root in Arabidopsis thaliana. NPJ Syst Biol Appl 2019; 5:4. [PMID: 30701083 PMCID: PMC6346032 DOI: 10.1038/s41540-018-0080-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 12/07/2018] [Indexed: 12/23/2022] Open
Abstract
We developed a mathematical model to simulate dynamics of central carbon metabolism over complete diurnal cycles for leaves of Arabidopsis thaliana exposed to either normal (120 µmol m-2 s-1) or high light intensities (1200 µmol m- 2 s-1). The main objective was to obtain a high-resolution time series for metabolite dynamics as well as for shoot structural carbon formation (compounds with long residence time) and assimilate export of aerial organs to the sink tissue. Model development comprised a stepwise increment of complexity to finally approach the in vivo situation. The correct allocation of assimilates to either sink export or shoot structural carbon formation was a central goal of model development. Diurnal gain of structural carbon was calculated based on the daily increment in total photosynthetic carbon fixation, and this was the only parameter for structural carbon formation implemented in the model. Simulations of the dynamics of central metabolite pools revealed that shoot structural carbon formation occurred solely during the light phase but not during the night. The model allowed simulation of shoot structural carbon formation as a function of central leaf carbon metabolism under different environmental conditions without structural modifications. Model simulations were performed for the accession Landsberg erecta (Ler) and its hexokinase null-mutant gin2-1. This mutant displays a slow growth phenotype especially at increasing light intensities. Comparison of simulations revealed that the retarded shoot growth in the mutant resulted from an increased assimilate transport to sink organs. Due to its central function in sucrose cycling and sugar signaling, our findings suggest an important role of hexokinase-1 for carbon allocation to either shoot growth or assimilate export.
Collapse
Affiliation(s)
- Lisa Küstner
- University of Stuttgart, Institute of Biomaterials and Biomolecular Systems, Department of Plant Biotechnology, Pfaffenwaldring 57, 70569 Stuttgart, Germany
| | - Thomas Nägele
- Ludwig-Maximilians-University Munich, Department Biology I, Plant Evolutionary Cell Biology, Großhaderner Str. 2-4, 82152 Planegg-Martinsried, Germany
| | - Arnd G. Heyer
- University of Stuttgart, Institute of Biomaterials and Biomolecular Systems, Department of Plant Biotechnology, Pfaffenwaldring 57, 70569 Stuttgart, Germany
| |
Collapse
|
28
|
Zhao Y, Li X, Wang F, Zhao X, Gao Y, Zhao C, He L, Li Z, Xu J. Glycerol-3-phosphate dehydrogenase (GPDH) gene family in Zea mays L.: Identification, subcellular localization, and transcriptional responses to abiotic stresses. PLoS One 2018; 13:e0200357. [PMID: 29990328 PMCID: PMC6039019 DOI: 10.1371/journal.pone.0200357] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 06/25/2018] [Indexed: 12/23/2022] Open
Abstract
Glycerol-3-phosphate dehydrogenase (GPDH) catalyzes the formation of glycerol-3-phosphate, and plays an essential role in glycerolipid metabolism and in response to various stresses in different species. In this study, six ZmGPDH genes were obtained by a thorough search against maize genome, and designated as ZmGPDH1-6, respectively. The structural and evolutionary analyses showed that the ZmGPDHs family had typical conserved domains and similar protein structures as the known GPDHs from other plant species. ZmGPDHs were divided into NAD+-dependent type A form (ZmGPDH1-5) and FAD-dependent type B form (ZmGPDH6) based on their N-terminal sequences. Four full length ZmGPDHs were fused with GFP fusion proteins, and their subcellular localization was determined. ZmGPDH1 and ZmGPDH3 were located to the cytosol and mainly recruited to the surface of endoplasmic reticulum (ER), whereas ZmGPDH4 and ZmGPDH5 were located in the chloroplast. The transcriptional analysis of the ZmGPDHs in different maize tissues revealed relatively high level of transcripts accumulation of ZmGPDHs in roots and early stage developing seeds. Furthermore, we examined the transcriptional responses of the six GPDH genes in maize under various abiotic stresses, including salt, drought, alkali and cold, and significant induction of ZmGPDHs under osmotic stresses was observed. Together, this work will provide useful information for deciphering the roles of GPDHs in plant development and abiotic stress responses.
Collapse
Affiliation(s)
- Ying Zhao
- Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, Daqing Key Lab of Straw Reclamation Technology Research and Development, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, People's Republic of China
| | - Xin Li
- Heilongjiang Academy of Agricultural Sciences, Harbin, People's Republic of China
| | - Feng Wang
- Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, Daqing Key Lab of Straw Reclamation Technology Research and Development, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, People's Republic of China
| | - Xunchao Zhao
- Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, Daqing Key Lab of Straw Reclamation Technology Research and Development, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, People's Republic of China
| | - Yuqiao Gao
- Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, Daqing Key Lab of Straw Reclamation Technology Research and Development, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, People's Republic of China
| | - Changjiang Zhao
- Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, Daqing Key Lab of Straw Reclamation Technology Research and Development, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, People's Republic of China
| | - Lin He
- Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, Daqing Key Lab of Straw Reclamation Technology Research and Development, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, People's Republic of China
| | - Zuotong Li
- Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, Daqing Key Lab of Straw Reclamation Technology Research and Development, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, People's Republic of China
- * E-mail: (ZTL); (JX)
| | - Jingyu Xu
- Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, Daqing Key Lab of Straw Reclamation Technology Research and Development, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, People's Republic of China
- * E-mail: (ZTL); (JX)
| |
Collapse
|
29
|
Wedeking R, Maucourt M, Deborde C, Moing A, Gibon Y, Goldbach HE, Wimmer MA. 1H-NMR metabolomic profiling reveals a distinct metabolic recovery response in shoots and roots of temporarily drought-stressed sugar beets. PLoS One 2018; 13:e0196102. [PMID: 29738573 PMCID: PMC5940195 DOI: 10.1371/journal.pone.0196102] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 04/08/2018] [Indexed: 11/19/2022] Open
Abstract
Yield formation in regions with intermittent drought periods depends on the plant’s ability to recover after cessation of the stress. The present work assessed differences in metabolic recovery of leaves and roots of drought-stressed sugar beets with high temporal resolution. Plants were subjected to drought for 13 days, and rewatered for 12 days. At one to two-day intervals, plant material was harvested for untargeted 1H-NMR metabolomic profiling, targeted analyses of hexose-phosphates, starch, amino acids, nitrate and proteins, and physiological measurements including relative water content, osmotic potential, electrolyte leakage and malondialdehyde concentrations. Drought triggered changes in primary metabolism, especially increases in amino acids in both organs, but leaves and roots responded with different dynamics to rewatering. After a transient normalization of most metabolites within 8 days, a second accumulation of amino acids in leaves might indicate a stress imprint beneficial in upcoming drought events. Repair mechanisms seemed important during initial recovery and occurred at the expense of growth for at least 12 days. These results indicate that organ specific metabolic recovery responses might be related to distinct functions and concomitant disparate stress levels in above- and belowground organs. With respect to metabolism, recovery was not simply a reversal of the stress responses.
Collapse
Affiliation(s)
- Rita Wedeking
- Department of Plant Nutrition, INRES, University of Bonn, Bonn, Germany
| | - Mickaël Maucourt
- UMR1332 Biologie du Fruit et Pathologie, INRA, Université Bordeaux, Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux- MetaboHUB, Centre de Génomique Fonctionnelle - IBVM, Villenave d’Ornon, France
| | - Catherine Deborde
- UMR1332 Biologie du Fruit et Pathologie, INRA, Université Bordeaux, Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux- MetaboHUB, Centre de Génomique Fonctionnelle - IBVM, Villenave d’Ornon, France
| | - Annick Moing
- UMR1332 Biologie du Fruit et Pathologie, INRA, Université Bordeaux, Villenave d’Ornon, France
- Plateforme Métabolome Bordeaux- MetaboHUB, Centre de Génomique Fonctionnelle - IBVM, Villenave d’Ornon, France
| | - Yves Gibon
- UMR1332 Biologie du Fruit et Pathologie, INRA, Université Bordeaux, Villenave d’Ornon, France
| | | | - Monika A. Wimmer
- Department of Plant Nutrition, INRES, University of Bonn, Bonn, Germany
- * E-mail:
| |
Collapse
|
30
|
Chhikara S, Abdullah HM, Akbari P, Schnell D, Dhankher OP. Engineering Camelina sativa (L.) Crantz for enhanced oil and seed yields by combining diacylglycerol acyltransferase1 and glycerol-3-phosphate dehydrogenase expression. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:1034-1045. [PMID: 28975735 PMCID: PMC5902773 DOI: 10.1111/pbi.12847] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 09/14/2017] [Accepted: 09/27/2017] [Indexed: 05/05/2023]
Abstract
Plant seed oil-based liquid transportation fuels (i.e., biodiesel and green diesel) have tremendous potential as environmentally, economically and technologically feasible alternatives to petroleum-derived fuels. Due to their nutritional and industrial importance, one of the major objectives is to increase the seed yield and oil production of oilseed crops via biotechnological approaches. Camelina sativa, an emerging oilseed crop, has been proposed as an ideal crop for biodiesel and bioproduct applications. Further increase in seed oil yield by increasing the flux of carbon from increased photosynthesis into triacylglycerol (TAG) synthesis will make this crop more profitable. To increase the oil yield, we engineered Camelina by co-expressing the Arabidopsis thaliana (L.) Heynh. diacylglycerol acyltransferase1 (DGAT1) and a yeast cytosolic glycerol-3-phosphate dehydrogenase (GPD1) genes under the control of seed-specific promoters. Plants co-expressing DGAT1 and GPD1 exhibited up to 13% higher seed oil content and up to 52% increase in seed mass compared to wild-type plants. Further, DGAT1- and GDP1-co-expressing lines showed significantly higher seed and oil yields on a dry weight basis than the wild-type controls or plants expressing DGAT1 and GPD1 alone. The oil harvest index (g oil per g total dry matter) for DGTA1- and GPD1-co-expressing lines was almost twofold higher as compared to wild type and the lines expressing DGAT1 and GPD1 alone. Therefore, combining the overexpression of TAG biosynthetic genes, DGAT1 and GPD1, appears to be a positive strategy to achieve a synergistic effect on the flux through the TAG synthesis pathway, and thereby further increase the oil yield.
Collapse
Affiliation(s)
- Sudesh Chhikara
- Stockbridge School of AgricultureUniversity of Massachusetts AmherstAmherstMAUSA
- Present address:
Centre for BiotechnologyMaharshi Dayanand UniversityRohtak124001India
| | - Hesham M. Abdullah
- Stockbridge School of AgricultureUniversity of Massachusetts AmherstAmherstMAUSA
- Biotechnology DepartmentFaculty of AgricultureAl‐Azhar UniversityCairoEgypt
| | - Parisa Akbari
- Stockbridge School of AgricultureUniversity of Massachusetts AmherstAmherstMAUSA
| | - Danny Schnell
- Department of Plant BiologyMichigan State UniversityEast LansingMIUSA
| | - Om Parkash Dhankher
- Stockbridge School of AgricultureUniversity of Massachusetts AmherstAmherstMAUSA
| |
Collapse
|
31
|
Temperature-dependent metabolic adaptation of Triticum aestivum seedlings to anoxia. Sci Rep 2018; 8:6151. [PMID: 29670175 PMCID: PMC5906562 DOI: 10.1038/s41598-018-24419-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 04/03/2018] [Indexed: 11/30/2022] Open
Abstract
Wheat (Triticum aestivum) is considered anoxia intolerant but it shows variance in anoxia responses between genotypes and environmental treatments. We firstly examined 4 day old seedlings of five wheat genotypes in response to anoxia at 15 °C and 28 °C by assessing growth rate, tissue damage and changes in metabolite abundances. Significant genotypic variations in anoxia tolerance were observed, especially at 28 °C. Wheat seedlings grown at 15 °C appeared to be more anoxia tolerant and showed less genotypic variation than those at 28 °C. To minimize seedling size variations and define the temperature effects, we grew two contrasting genotypes at 15 °C for 3.5 d and adapted to 4 different temperatures for 0.5 d before exposing them to anoxia at each adapted temperature. Genotypic variation in abundance of anoxia induced metabolites occurred at 24 °C and 28 °C but not at 15 °C and 20 °C. Tissue- and temperature-dependent metabolic adaptations to anoxia were revealed. In roots, the ability to maintain sugar/sugar-phosphate and TCA cycle metabolite levels and the accumulation of amino acids when temperature was below 24 °C correlated with anoxia tolerance. Temperatures between 20 °C–24 °C are critical for metabolic adaptation and suggest that further assessment of waterlogging/flooding tolerance of wheat seedlings should consider the temperature-dependence of tolerance in evaluations.
Collapse
|
32
|
Mengin V, Pyl ET, Alexandre Moraes T, Sulpice R, Krohn N, Encke B, Stitt M. Photosynthate partitioning to starch in Arabidopsis thaliana is insensitive to light intensity but sensitive to photoperiod due to a restriction on growth in the light in short photoperiods. PLANT, CELL & ENVIRONMENT 2017; 40:2608-2627. [PMID: 28628949 DOI: 10.1111/pce.13000] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/12/2017] [Accepted: 05/15/2017] [Indexed: 05/18/2023]
Abstract
Photoperiod duration can be predicted from previous days, but irradiance fluctuates in an unpredictable manner. To investigate how allocation to starch responds to changes in these two environmental variables, Arabidopsis Col-0 was grown in a 6 h and a 12 h photoperiod at three different irradiances. The absolute rate of starch accumulation increased when photoperiod duration was shortened and when irradiance was increased. The proportion of photosynthate allocated to starch increased strongly when photoperiod duration was decreased but only slightly when irradiance was decreased. There was a small increase in the daytime level of sucrose and twofold increases in glucose, fructose and glucose 6-phosphate at a given irradiance in short photoperiods compared to long photoperiods. The rate of starch accumulation correlated strongly with sucrose and glucose levels in the light, irrespective of whether these sugars were responding to a change in photoperiod or irradiance. Whole plant carbon budget modelling revealed a selective restriction of growth in the light period in short photoperiods. It is proposed that photoperiod sensing, possibly related to the duration of the night, restricts growth in the light period in short photoperiods, increasing allocation to starch and providing more carbon reserves to support metabolism and growth in the long night.
Collapse
Affiliation(s)
- Virginie Mengin
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
| | - Eva-Theresa Pyl
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
| | | | - Ronan Sulpice
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
- NUI Galway, Plant Systems Biology Laboratory, Plant and AgriBiosciences Research Centre, School of Natural Sciences, Galway, H91 TK33, Ireland
| | - Nicole Krohn
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
| | - Beatrice Encke
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
| | - Mark Stitt
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
| |
Collapse
|
33
|
Xue LL, Chen HH, Jiang JG. Implications of glycerol metabolism for lipid production. Prog Lipid Res 2017; 68:12-25. [PMID: 28778473 DOI: 10.1016/j.plipres.2017.07.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 07/06/2017] [Accepted: 07/31/2017] [Indexed: 12/13/2022]
Abstract
Triacylglycerol (TAG) is an important product in oil-producing organisms. Biosynthesis of TAG can be completed through either esterification of fatty acids to glycerol backbone, or through esterification of 2-monoacylglycerol. This review will focus on the former pathway in which two precursors, fatty acid and glycerol-3-phosphate (G3P), are required for TAG formation. Tremendous progress has been made about the enzymes or genes that regulate the biosynthetic pathway of TAG. However, much attention has been paid to the fatty acid provision and the esterification process, while the possible role of G3P is largely neglected. Glycerol is extensively studied on its usage as carbon source for value-added products, but the modification of glycerol metabolism, which is directly associated with G3P synthesis, is seldom recognized in lipid investigations. The relevance among glycerol metabolism, G3P synthesis and lipid production is described, and the role of G3P in glycerol metabolism and lipid production are discussed in detail with an emphasis on how G3P affects lipid production through the modulation of glycerol metabolism. Observations of lipid metabolic changes due to glycerol related disruption in mammals, plants, and microorganisms are introduced. Altering glycerol metabolism results in the changes of final lipid content. Possible regulatory mechanisms concerning the relationship between glycerol metabolism and lipid production are summarized.
Collapse
Affiliation(s)
- Lu-Lu Xue
- (a)College of Food and Bioengineering, South China University of Technology, Guangzhou 510640, China; (b)Industrial Crops Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Hao-Hong Chen
- (a)College of Food and Bioengineering, South China University of Technology, Guangzhou 510640, China
| | - Jian-Guo Jiang
- (a)College of Food and Bioengineering, South China University of Technology, Guangzhou 510640, China.
| |
Collapse
|
34
|
Roach M, Arrivault S, Mahboubi A, Krohn N, Sulpice R, Stitt M, Niittylä T. Spatially resolved metabolic analysis reveals a central role for transcriptional control in carbon allocation to wood. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68. [PMID: 28645173 PMCID: PMC5853372 DOI: 10.1093/jxb/erx200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The contribution of transcriptional and post-transcriptional regulation to modifying carbon allocation to developing wood of trees is not well defined. To clarify the role of transcriptional regulation, the enzyme activity patterns of eight central primary metabolism enzymes across phloem, cambium, and developing wood of aspen (Populus tremula L.) were compared with transcript levels obtained by RNA sequencing of sequential stem sections from the same trees. Enzymes were selected on the basis of their importance in sugar metabolism and in linking primary metabolism to lignin biosynthesis. Existing enzyme assays were adapted to allow measurements from ~1 mm3 sections of dissected stem tissue. These experiments provided high spatial resolution of enzyme activity changes across different stages of wood development, and identified the gene transcripts probably responsible for these changes. In most cases, there was a clear positive relationship between transcripts and enzyme activity. During secondary cell wall formation, the increases in transcript levels and enzyme activities also matched with increased levels of glucose, fructose, hexose phosphates, and UDP-glucose, emphasizing an important role for transcriptional regulation in carbon allocation to developing aspen wood. These observations corroborate the efforts to increase carbon allocation to wood by engineering gene regulatory networks.
Collapse
Affiliation(s)
- Melissa Roach
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden
| | | | - Amir Mahboubi
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Nicole Krohn
- Max Planck Institute for Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Ronan Sulpice
- Max Planck Institute for Molecular Plant Physiology, Potsdam-Golm, Germany
- Plant Systems Biology Laboratory, Plant AgriBiosciences Research Centre, School of Natural Science, Galway, Ireland
| | - Mark Stitt
- Max Planck Institute for Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Totte Niittylä
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden
- Correspondence:
| |
Collapse
|
35
|
Shen Y, Issakidis-Bourguet E, Zhou DX. Perspectives on the interactions between metabolism, redox, and epigenetics in plants. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:5291-5300. [PMID: 27531885 DOI: 10.1093/jxb/erw310] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Epigenetic modifications of chromatin usually involve consumption of key metabolites and redox-active molecules. Primary metabolic flux and cellular redox states control the activity of enzymes involved in chromatin modifications, such as DNA methylation, histone acetylation, and histone methylation, which in turn regulate gene expression and/or enzymatic activity of specific metabolic and redox pathways. Thus, coordination of metabolism and epigenetic regulation of gene expression is critical to control growth and development in response to the cellular environment. Much has been learned from animal and yeast cells with regard to the interplay between metabolism and epigenetic regulation, and now the metabolic control of epigenetic pathways in plants is an increasing area of study. Epigenetic mechanisms are largely similar between plant and mammalian cells, but plants display very important differences in both metabolism and metabolic/redox signaling pathways. In this review, we summarize recent developments in the field and discuss perspectives of studying interactions between plant epigenetic and metabolism/redox systems, which are essential for plant adaptation to environmental conditions.
Collapse
Affiliation(s)
- Yuan Shen
- Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, Université Paris-sud 11, 91400 Orsay, France
| | | | - Dao-Xiu Zhou
- Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, Université Paris-sud 11, 91400 Orsay, France
| |
Collapse
|
36
|
Starch Granule Re-Structuring by Starch Branching Enzyme and Glucan Water Dikinase Modulation Affects Caryopsis Physiology and Metabolism. PLoS One 2016; 11:e0149613. [PMID: 26891365 PMCID: PMC4758647 DOI: 10.1371/journal.pone.0149613] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 02/03/2016] [Indexed: 12/31/2022] Open
Abstract
Starch is of fundamental importance for plant development and reproduction and its optimized molecular assembly is potentially necessary for correct starch metabolism. Re-structuring of starch granules in-planta can therefore potentially affect plant metabolism. Modulation of granule micro-structure was achieved by decreasing starch branching and increasing starch-bound phosphate content in the barley caryopsis starch by RNAi suppression of all three Starch Branching Enzyme (SBE) isoforms or overexpression of potato Glucan Water Dikinase (GWD). The resulting lines displayed Amylose-Only (AO) and Hyper-Phosphorylated (HP) starch chemotypes, respectively. We studied the influence of these alterations on primary metabolism, grain composition, starch structural features and starch granule morphology over caryopsis development at 10, 20 and 30 days after pollination (DAP) and at grain maturity. While HP showed relatively little effect, AO showed significant reduction in starch accumulation with re-direction to protein and β-glucan (BG) accumulation. Metabolite profiling indicated significantly higher sugar accumulation in AO, with re-partitioning of carbon to accumulate amino acids, and interestingly it also had high levels of some important stress-related metabolites and potentially protective metabolites, possibly to elude deleterious effects. Investigations on starch molecular structure revealed significant increase in starch phosphate and amylose content in HP and AO respectively with obvious differences in starch granule morphology at maturity. The results demonstrate that decreasing the storage starch branching resulted in metabolic adjustments and re-directions, tuning to evade deleterious effects on caryopsis physiology and plant performance while only little effect was evident by increasing starch-bound phosphate as a result of overexpressing GWD.
Collapse
|
37
|
Rye PT, LaMarr WA. Measurement of glycolysis reactants by high-throughput solid phase extraction with tandem mass spectrometry: Characterization of pyrophosphate-dependent phosphofructokinase as a case study. Anal Biochem 2015; 482:40-7. [PMID: 25849585 DOI: 10.1016/j.ab.2015.03.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 02/26/2015] [Accepted: 03/28/2015] [Indexed: 01/28/2023]
Abstract
Glycolysis is a 10-step metabolic pathway involved in producing cellular energy. Many tumors exhibit accelerated glycolytic rates, and enzymes that participate in this pathway are focal points of cancer research. Here, a novel method for the measurement of glycolysis reactants from in vitro samples is presented. Fast and direct measurement is achieved by an automated system that couples on-line solid phase extraction (SPE) with tandem mass spectrometry (MS/MS). The single analytical method enables multiple reactants to be measured concurrently, sustains a cycle time of 8s, and permits the measurement of up to 10,000 samples per day. Concentration-response curves were conducted using standards for 10 metabolic intermediates, and the results demonstrate that the detection strategy has excellent sensitivity (average limit of detection = 5.4 nM), dynamic range (nanomolar to micromolar), and linear response (average R(2) = 0.998). To test the analysis method on reactions, pyrophosphate-dependent phosphofructokinase (PPi-PFK) was used as a model system. Data that corroborate the activation and inhibition of PPi-PFK are presented, and the ways in which SPE-MS/MS simplifies experimental design and interpretation are highlighted. In summary, the method for measuring metabolic intermediates described here demonstrates unprecedented speed, performance, and versatility.
Collapse
Affiliation(s)
- Peter T Rye
- Agilent Technologies, Wakefield, MA 01880, USA.
| | | |
Collapse
|
38
|
Reda M. Response of nitrate reductase activity and NIA genes expression in roots of Arabidopsis hxk1 mutant treated with selected carbon and nitrogen metabolites. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2015; 230:51-8. [PMID: 25480007 DOI: 10.1016/j.plantsci.2014.10.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 10/22/2014] [Accepted: 10/24/2014] [Indexed: 05/24/2023]
Abstract
In plants sugar sensing and signal transduction involves pathways dependent or independent on HXK1 as a glucose sensor. Research was conducted to determine which pathway is responsible for regulation of the nitrate reduction. The effect of selected carbon and nitrogen metabolites on nitrate reductase (NR) activity in Arabidopsis thaliana wild type (WT) and hxk1 mutant roots was studied. Exogenously supplied sugar, sucrose (Suc) and organic acid, 2-oxoglutarate (2-OG) led to an increase in the total and actual activity of NR. It was due to both the increase in expression of NIA genes and NR activation state. The stimulatory effect of Suc and 2-OG on nitrate reduction was less pronounced in hxk1 mutant roots with T-DNA insertion in the AtHXK1 gene encoding hexokinase1 (HXK1) and characterized by reduced hexokinase activity and root level of G6P and F6P. On the other hand, it was shown that exogenous glucose did not mimic Suc-mediated NR activation in Arabidopsis roots. Taken together, this data suggest that the Suc signaling pathway might be independent from hexose's sensor dependent mechanism.
Collapse
Affiliation(s)
- Małgorzata Reda
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wrocław, Kanonia 6/8, 50-328 Wrocław, Poland.
| |
Collapse
|
39
|
Desnoues E, Gibon Y, Baldazzi V, Signoret V, Génard M, Quilot-Turion B. Profiling sugar metabolism during fruit development in a peach progeny with different fructose-to-glucose ratios. BMC PLANT BIOLOGY 2014; 14:336. [PMID: 25421154 PMCID: PMC4247632 DOI: 10.1186/s12870-014-0336-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 11/14/2014] [Indexed: 05/18/2023]
Abstract
BACKGROUND Fruit taste is largely affected by the concentration of soluble sugars and organic acids and non-negligibly by fructose concentration, which is the sweetest-tasting sugar. To date, many studies investigating the sugars in fruit have focused on a specific sugar or enzyme and often on a single variety, but only a few detailed studies addressing sugar metabolism both as a whole and dynamic system are available. In commercial peach fruit, sucrose is the main sugar, followed by fructose and glucose, which have similar levels. Interestingly, low fructose-to-glucose ratios have been observed in wild peach accessions. A cross between wild peach and commercial varieties offers an outstanding possibility to study fruit sugar metabolism. RESULTS This work provides a large dataset of sugar composition and the capacities of enzymes that are involved in sugar metabolism during peach fruit development and its genetic diversity. A large fraction of the metabolites and enzymes involved in peach sugar metabolism were assayed within a peach progeny of 106 genotypes, of which one quarter displayed a low fructose-to-glucose ratio. This profiling was performed at six stages of growth using high throughput methods. Our results permit drawing a quasi-exhaustive scheme of sugar metabolism in peach. The use of a large number of genotypes revealed a remarkable robustness of enzymatic capacities across genotypes and years, despite strong variations in sugar composition, in particular the fructose-to-glucose ratio, within the progeny. A poor correlation was also found between the enzymatic capacities and the accumulation rates of metabolites. CONCLUSIONS These results invalidate the hypothesis of the straightforward enzymatic control of sugar concentration in peach fruit. Alternative hypotheses concerning the regulation of fructose concentration are discussed based on experimental data. This work lays the foundation for a comprehensive study of the mechanisms involved in sugar metabolism in developing fruit.
Collapse
Affiliation(s)
- Elsa Desnoues
- />INRA, UR1052 Génétique et Amélioration des Fruits et Légumes, F-84000 Avignon, France
- />INRA, UR1115 Plantes et Systèmes de Culture Horticoles, F-84000 Avignon, France
| | - Yves Gibon
- />INRA, UMR 1332 Biologie du Fruit et Pathologie, F33883 Villenave d’Ornon, France
- />Univ. Bordeaux 146 rue Léo-Saignat, F 33076 Bordeaux, Cedex France
- />Metabolome Facility of Bordeaux Functional Genomics Center, IBVM, Centre INRA de Bordeaux, F-33140 Villenave d’Ornon, France
| | - Valentina Baldazzi
- />INRA, UR1115 Plantes et Systèmes de Culture Horticoles, F-84000 Avignon, France
| | - Véronique Signoret
- />INRA, UR1052 Génétique et Amélioration des Fruits et Légumes, F-84000 Avignon, France
| | - Michel Génard
- />INRA, UR1115 Plantes et Systèmes de Culture Horticoles, F-84000 Avignon, France
| | | |
Collapse
|
40
|
Mustroph A, Barding GA, Kaiser KA, Larive CK, Bailey-Serres J. Characterization of distinct root and shoot responses to low-oxygen stress in Arabidopsis with a focus on primary C- and N-metabolism. PLANT, CELL & ENVIRONMENT 2014; 37:2366-80. [PMID: 24450922 DOI: 10.1111/pce.12282] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 01/10/2014] [Accepted: 01/12/2014] [Indexed: 05/02/2023]
Abstract
Oxygen deficiency, caused by flooding of all or a portion of a plant, leads to significant gene regulatory and metabolic responses associated with survival. When oxygen-deprived in light, aerial organs and root systems respond in distinct manners because of their respective autotrophy and heterotrophy, as well as intrinsic differences in cell biology and organ function. To better understand organ-specific responses to oxygen deficiency, we monitored changes in the metabolome of roots and shoots of Arabidopsis thaliana seedlings using gas chromatography-mass spectrometry and (1) H-nuclear magnetic resonance spectroscopy. Only roots accumulated high amounts of γ-aminobutyrate (GABA) and lactate, whereas both organs accumulated alanine (Ala) upon hypoxia. Meta-analysis of gene regulation data revealed higher induction of mRNAs coding for fermentative enzymes in roots as compared with shoots. However, the elevation in GABA level was not correlated with changes in transcript abundance, supporting the proposal that post-translational mechanisms are important in metabolic acclimation to hypoxia. The biosynthesis, degradation and function of GABA and Ala during oxygen deprivation and re-aeration is discussed. Finally, a systematic survey of low-oxygen mediated regulation of genes associated with primary metabolism across organs and cell types reveals exciting new avenues for future studies.
Collapse
|
41
|
Biais B, Bénard C, Beauvoit B, Colombié S, Prodhomme D, Ménard G, Bernillon S, Gehl B, Gautier H, Ballias P, Mazat JP, Sweetlove L, Génard M, Gibon Y. Remarkable reproducibility of enzyme activity profiles in tomato fruits grown under contrasting environments provides a roadmap for studies of fruit metabolism. PLANT PHYSIOLOGY 2014; 164:1204-21. [PMID: 24474652 PMCID: PMC3938614 DOI: 10.1104/pp.113.231241] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 01/28/2014] [Indexed: 05/18/2023]
Abstract
To assess the influence of the environment on fruit metabolism, tomato (Solanum lycopersicum 'Moneymaker') plants were grown under contrasting conditions (optimal for commercial, water limited, or shaded production) and locations. Samples were harvested at nine stages of development, and 36 enzyme activities of central metabolism were measured as well as protein, starch, and major metabolites, such as hexoses, sucrose, organic acids, and amino acids. The most remarkable result was the high reproducibility of enzyme activities throughout development, irrespective of conditions or location. Hierarchical clustering of enzyme activities also revealed tight relationships between metabolic pathways and phases of development. Thus, cell division was characterized by high activities of fructokinase, glucokinase, pyruvate kinase, and tricarboxylic acid cycle enzymes, indicating ATP production as a priority, whereas cell expansion was characterized by enzymes involved in the lower part of glycolysis, suggesting a metabolic reprogramming to anaplerosis. As expected, enzymes involved in the accumulation of sugars, citrate, and glutamate were strongly increased during ripening. However, a group of enzymes involved in ATP production, which is probably fueled by starch degradation, was also increased. Metabolites levels seemed more sensitive than enzymes to the environment, although such differences tended to decrease at ripening. The integration of enzyme and metabolite data obtained under contrasting growth conditions using principal component analysis suggests that, with the exceptions of alanine amino transferase and glutamate and malate dehydrogenase and malate, there are no links between single enzyme activities and metabolite time courses or levels.
Collapse
Affiliation(s)
- Benoît Biais
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Camille Bénard
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Bertrand Beauvoit
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Sophie Colombié
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Duyên Prodhomme
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Guillaume Ménard
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Stéphane Bernillon
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Bernadette Gehl
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Hélène Gautier
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Patricia Ballias
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Jean-Pierre Mazat
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Lee Sweetlove
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Michel Génard
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | | |
Collapse
|
42
|
Tomé F, Nägele T, Adamo M, Garg A, Marco-llorca C, Nukarinen E, Pedrotti L, Peviani A, Simeunovic A, Tatkiewicz A, Tomar M, Gamm M. The low energy signaling network. FRONTIERS IN PLANT SCIENCE 2014; 5:353. [PMID: 25101105 PMCID: PMC4102169 DOI: 10.3389/fpls.2014.00353] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 07/02/2014] [Indexed: 05/07/2023]
Abstract
Stress impacts negatively on plant growth and crop productivity, caicultural production worldwide. Throughout their life, plants are often confronted with multiple types of stress that affect overall cellular energy status and activate energy-saving responses. The resulting low energy syndrome (LES) includes transcriptional, translational, and metabolic reprogramming and is essential for stress adaptation. The conserved kinases sucrose-non-fermenting-1-related protein kinase-1 (SnRK1) and target of rapamycin (TOR) play central roles in the regulation of LES in response to stress conditions, affecting cellular processes and leading to growth arrest and metabolic reprogramming. We review the current understanding of how TOR and SnRK1 are involved in regulating the response of plants to low energy conditions. The central role in the regulation of cellular processes, the reprogramming of metabolism, and the phenotypic consequences of these two kinases will be discussed in light of current knowledge and potential future developments.
Collapse
Affiliation(s)
- Filipa Tomé
- Bayer CropScience NV, Innovation CenterGhent, Belgium
- *Correspondence: Filipa Tomé, Bayer CropScience NV, Innovation Center, Technologiepark 38, 9052 Zwijnaarde (Ghent), Belgium e-mail:
| | - Thomas Nägele
- Department of Ecogenomics and Systems Biology, University of ViennaVienna, Austria
| | | | - Abhroop Garg
- Zentrum für Molekularbiologie der Pflanzen, Eberhard Karls Universität TübingenTübingen, Germany
| | - Carles Marco-llorca
- Zentrum für Molekularbiologie der Pflanzen, Eberhard Karls Universität TübingenTübingen, Germany
| | - Ella Nukarinen
- Department of Ecogenomics and Systems Biology, University of ViennaVienna, Austria
| | - Lorenzo Pedrotti
- Julius-von-Sachs-Institut, Julius-Maximilians-Universität WürzburgWürzburg, Germany
| | - Alessia Peviani
- Theoretical Biology and Bioinformatics, Department of Biology, Faculty of Science, Utrecht UniversityUtrecht, Netherlands
| | - Andrea Simeunovic
- Department of Ecogenomics and Systems Biology, University of ViennaVienna, Austria
| | - Anna Tatkiewicz
- Universidad Politécnica de Madrid–Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de MadridMadrid, Spain
| | - Monika Tomar
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht UniversityUtrecht, Netherlands
| | - Magdalena Gamm
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht UniversityUtrecht, Netherlands
| |
Collapse
|
43
|
Mustroph A, Hess N, Sasidharan R. Hypoxic Energy Metabolism and PPi as an Alternative Energy Currency. LOW-OXYGEN STRESS IN PLANTS 2014. [DOI: 10.1007/978-3-7091-1254-0_9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
44
|
|
45
|
Reda M. Regulation of nitrate reduction in Arabidopsis WT and hxk1 mutant under C and N metabolites. PHYSIOLOGIA PLANTARUM 2013; 149:260-272. [PMID: 23480350 DOI: 10.1111/ppl.12045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 02/07/2013] [Accepted: 02/15/2013] [Indexed: 06/01/2023]
Abstract
As in plants sugar sensing and signal transduction involve pathways dependent or independent on hexokinase 1 (HXK1) as a glucose sensor, research was conducted to determine which pathway is responsible for regulation of the nitrate reduction. An Arabidopsis mutant with T-DNA insertion in the AtHXK1 gene and defects in glucose signaling (hxk1) was used to determine nitrate reductase (NR) activity, NIA genes expression in leaves after 8-h treatment with sugars (glucose and sucrose), organic acids [2-oxoglutarate (2OG)] and amino acids (glutamine and glutamate). Sugars, especially sucrose, caused induction of NR actual activity accompanied by an increase of the NR activation state, indicating the posttranslational nature of the modifications. Those modifications were observed in wild-type (WT) and hxk1 leaves, suggesting that regulation of NR activity by sugars does not involve HXK1 as a glucose sensor. Moreover, sugars enhanced expression of NIA genes. However, a higher level of NIA transcripts did not lead to an increase of total NR activity in sugar-treated plants. This may suggest that posttranslational modification of NR is fundamental regulatory mechanisms controlling NR activity in response to C metabolites. Treatment of plants with 2-OG also modified NR through the posttranslational modifications. Elevation of actual NR activity and the enzyme activation state in WT and hxk1 leaves was observed. Amino acids caused a decrease of NIA gene expression and NR activities in WT and hxk1 leaves indicating that mutation in the hexokinase-dependent glucose signaling pathway did not interrupt the amino acid feedback regulation of NR.
Collapse
Affiliation(s)
- Małgorzata Reda
- Department of Plant Molecular Physiology, Institute of Experimental Biology, Wrocław University, Wrocław, 50-328, Poland
| |
Collapse
|
46
|
Jankowska DA, Faulwasser K, Trautwein-Schult A, Cordes A, Hoferichter P, Klein C, Bode R, Baronian K, Kunze G. Arxula adeninivorans recombinant adenine deaminase and its application in the production of food with low purine content. J Appl Microbiol 2013; 115:1134-46. [PMID: 23902582 DOI: 10.1111/jam.12317] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 07/15/2013] [Accepted: 07/23/2013] [Indexed: 11/26/2022]
Abstract
AIMS Construction of a transgenic Arxula adeninivorans strain that produces a high concentration of adenine deaminase and investigation into the application of the enzyme in the production of food with low purine content. METHODS AND RESULTS The A. adeninivorans AADA gene, encoding adenine deaminase, was expressed in this yeast under the control of the strong inducible nitrite reductase promoter using the Xplor(®) 2 transformation/expression platform. The recombinant enzyme was biochemically characterized and was found to have a pH range of 5.5-7.5 and temperature range of 34-46 °C with medium thermostability. A beef broth was treated with the purified enzyme resulting in the concentration of adenine decreasing from 70.4 to 0.4 mg l(-1). CONCLUSIONS It was shown that the production of adenine deaminase by A. adeninivorans can be increased and that the recombinant adenine deaminase can be used to lower the adenine content in the food. SIGNIFICANCE AND IMPACT OF THE STUDY Adenine deaminase is one component of an enzymatic system that can reduce the production of uric acid from food constituents. This study gives details on the expression, characterization and application of the enzyme and thus provides evidence that supports the further development of the system.
Collapse
Affiliation(s)
- D A Jankowska
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Kazłowski B, Chen MR, Chao PM, Lai CC, Ko YT. Identification and roles of proteins for seed development in mungbean (Vigna radiata L.) seed proteomes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:6650-6659. [PMID: 23758297 DOI: 10.1021/jf401170g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Proteomic analysis of developing mungbean (Vigna radiata L.) seeds has not yet been investigated in detail. Fifty-seven proteins were separated by 2-DE, identified by nanoelectrospray mass spectrometry from the present protein databases, and categorized according to their functions. Many of the identified enzymes were involved in central carbon metabolism; thus, a pathway illustrating starch synthesis/breakdown, sugar conversion for glycolysis, and tricarboxylic acid (TCA) cycle was proposed. Quantitative comparison of the protein expression revealed that during developmental process (11-21 days after flowering, DAF), proteins involved in glycolysis, TCA cycle, and alcoholic fermentation showed a trend to be down-regulated, whereas storage proteins were generally up-regulated. The downward tendency of central carbon metabolic proteins suggests a reduction in ATP and oxygen consumption associated with accumulation of storage compounds. UDP-glucose-1-pyrophosphorylase, an upstream enzyme in the starch ADP-Glc pathway, was found as a stably expressed protein throughout the growth stage, demonstrating its importance in mungbean starch biosynthesis. The temporal expression of metabolic enzymes suggests the coordination of an acclimation mechanism and cellular processes associated with accumulation of storage compounds in seed development.
Collapse
Affiliation(s)
- Bartosz Kazłowski
- Department of Food Science, Biotechnology Division, College of Life Sciences, National Taiwan Ocean University , 2 Pei-Ning Road, Keelung 20224, Taiwan, Republic of China (ROC)
| | | | | | | | | |
Collapse
|
48
|
Jankowska D, Trautwein-Schult A, Cordes A, Hoferichter P, Klein C, Bode R, Baronian K, Kunze G. Arxula adeninivorans
xanthine oxidoreductase and its application in the production of food with low purine content. J Appl Microbiol 2013; 115:796-807. [DOI: 10.1111/jam.12284] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 06/04/2013] [Accepted: 06/11/2013] [Indexed: 11/29/2022]
Affiliation(s)
- D.A. Jankowska
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK); Gatersleben Germany
| | - A. Trautwein-Schult
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK); Gatersleben Germany
| | - A. Cordes
- ASA Spezialenzyme GmbH; Am Exer 19c; Wolfenbüttel Germany
| | - P. Hoferichter
- ASA Spezialenzyme GmbH; Am Exer 19c; Wolfenbüttel Germany
| | - C. Klein
- ASA Spezialenzyme GmbH; Am Exer 19c; Wolfenbüttel Germany
| | - R. Bode
- Institute of Biochemistry; University of Greifswald; Greifswald Germany
| | - K. Baronian
- School of Biological Sciences; University of Canterbury; Christchurch New Zealand
| | - G. Kunze
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK); Gatersleben Germany
| |
Collapse
|
49
|
Nitschke F, Wang P, Schmieder P, Girard JM, Awrey DE, Wang T, Israelian J, Zhao X, Turnbull J, Heydenreich M, Kleinpeter E, Steup M, Minassian BA. Hyperphosphorylation of glucosyl C6 carbons and altered structure of glycogen in the neurodegenerative epilepsy Lafora disease. Cell Metab 2013; 17:756-67. [PMID: 23663739 DOI: 10.1016/j.cmet.2013.04.006] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 03/01/2013] [Accepted: 03/29/2013] [Indexed: 11/29/2022]
Abstract
Laforin or malin deficiency causes Lafora disease, characterized by altered glycogen metabolism and teenage-onset neurodegeneration with intractable and invariably fatal epilepsy. Plant starches possess small amounts of metabolically essential monophosphate esters. Glycogen contains similar phosphate amounts, which are thought to originate from a glycogen synthase error side reaction and therefore lack any specific function. Glycogen is also believed to lack monophosphates at glucosyl carbon C6, an essential phosphorylation site in plant starch metabolism. We now show that glycogen phosphorylation is not due to a glycogen synthase side reaction, that C6 is a major glycogen phosphorylation site, and that C6 monophosphates predominate near centers of glycogen molecules and positively correlate with glycogen chain lengths. Laforin or malin deficiency causes C6 hyperphosphorylation, which results in malformed long-chained glycogen that accumulates in many tissues, causing neurodegeneration in brain. Our work advances the understanding of Lafora disease pathogenesis and suggests that glycogen phosphorylation has important metabolic function.
Collapse
Affiliation(s)
- Felix Nitschke
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam-Golm, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Wahl V, Ponnu J, Schlereth A, Arrivault S, Langenecker T, Franke A, Feil R, Lunn JE, Stitt M, Schmid M. Regulation of flowering by trehalose-6-phosphate signaling in Arabidopsis thaliana. Science 2013; 339:704-7. [PMID: 23393265 DOI: 10.1126/science.1230406] [Citation(s) in RCA: 434] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The timing of the induction of flowering determines to a large extent the reproductive success of plants. Plants integrate diverse environmental and endogenous signals to ensure the timely transition from vegetative growth to flowering. Carbohydrates are thought to play a crucial role in the regulation of flowering, and trehalose-6-phosphate (T6P) has been suggested to function as a proxy for carbohydrate status in plants. The loss of TREHALOSE-6-PHOSPHATE SYNTHASE 1 (TPS1) causes Arabidopsis thaliana to flower extremely late, even under otherwise inductive environmental conditions. This suggests that TPS1 is required for the timely initiation of flowering. We show that the T6P pathway affects flowering both in the leaves and at the shoot meristem, and integrate TPS1 into the existing genetic framework of flowering-time control.
Collapse
Affiliation(s)
- Vanessa Wahl
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|