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Pereira AM, Martins AO, Batista-Silva W, Condori-Apfata JA, Silva VF, Oliveira LA, Andrade ES, Martins SCV, Medeiros DB, Nascimento VL, Fernie AR, Nunes-Nesi A, Araújo WL. Differential content of leaf and fruit pigment in tomatoes culminate in a complex metabolic reprogramming without growth impacts. J Plant Physiol 2024; 293:154170. [PMID: 38271894 DOI: 10.1016/j.jplph.2024.154170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 12/20/2023] [Accepted: 01/02/2024] [Indexed: 01/27/2024]
Abstract
Although significant efforts to produce carotenoid-enriched foods either by biotechnology or traditional breeding strategies have been carried out, our understanding of how changes in the carotenoid biosynthesis might affect overall plant performance remains limited. Here, we investigate how the metabolic machinery of well characterized tomato carotenoid mutant plants [namely crimson (old gold-og), Delta carotene (Del) and tangerine (t)] adjusts itself to varying carotenoid biosynthesis and whether these adjustments are supported by a reprogramming of photosynthetic and central metabolism in the source organs (leaves). We observed that mutations og, Del and t did not greatly affect vegetative growth, leaf anatomy and gas exchange parameters. However, an exquisite metabolic reprogramming was recorded on the leaves, with an increase in levels of amino acids and reduction of organic acids. Taken together, our results show that despite minor impacts on growth and gas exchange, carbon flux is extensively affected, leading to adjustments in tomato leaves metabolism to support changes in carotenoid biosynthesis on fruits (sinks). We discuss these data in the context of our current understanding of metabolic adjustments and carotenoid biosynthesis as well as regarding to improving human nutrition.
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Affiliation(s)
- Auderlan M Pereira
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Auxiliadora O Martins
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - William Batista-Silva
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Jorge A Condori-Apfata
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Victor F Silva
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Leonardo A Oliveira
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Eduarda Santos Andrade
- Setor de Fisiologia Vegetal - Departamento de Biologia, Universidade Federal de Lavras, Lavras, Minas Gerais, 37200-000, Brazil
| | - Samuel C V Martins
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - David B Medeiros
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Vitor L Nascimento
- Setor de Fisiologia Vegetal - Departamento de Biologia, Universidade Federal de Lavras, Lavras, Minas Gerais, 37200-000, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam Golm, Germany
| | - Adriano Nunes-Nesi
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Wagner L Araújo
- National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil.
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2
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Barros JAS, Cavalcanti JHF, Pimentel KG, Magen S, Soroka Y, Weiss S, Medeiros DB, Nunes-Nesi A, Fernie AR, Avin-Wittenberg T, Araújo WL. The interplay between autophagy and chloroplast vesiculation pathways under dark-induced senescence. Plant Cell Environ 2023; 46:3721-3736. [PMID: 37615309 DOI: 10.1111/pce.14701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 07/14/2023] [Accepted: 08/15/2023] [Indexed: 08/25/2023]
Abstract
In cellular circumstances where carbohydrates are scarce, plants can use alternative substrates for cellular energetic maintenance. In plants, the main protein reserve is present in the chloroplast, which contains most of the total leaf proteins and represents a rich source of nitrogen and amino acids. Autophagy plays a key role in chloroplast breakdown, a well-recognised symptom of both natural and stress-induced plant senescence. Remarkably, an autophagic-independent route of chloroplast degradation associated with chloroplast vesiculation (CV) gene was previously demonstrated. During extended darkness, CV is highly induced in the absence of autophagy, contributing to the early senescence phenotype of atg mutants. To further investigate the role of CV under dark-induced senescence conditions, mutants with low expression of CV (amircv) and double mutants amircv1xatg5 were characterised. Following darkness treatment, no aberrant phenotypes were observed in amircv single mutants; however, amircv1xatg5 double mutants displayed early senescence and altered dismantling of chloroplast and membrane structures under these conditions. Metabolic characterisation revealed that the functional lack of both CV and autophagy leads to higher impairment of amino acid release and differential organic acid accumulation during starvation conditions. The data obtained are discussed in the context of the role of CV and autophagy, both in terms of cellular metabolism and the regulation of chloroplast degradation.
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Affiliation(s)
- Jessica A S Barros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - João Henrique F Cavalcanti
- Instituto de Educação, Agricultura e Ambiente, Universidade Federal do Amazonas, Humaitá, Amazonas, Brazil
| | - Karla G Pimentel
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Sahar Magen
- Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Givat Ram, Jerusalem, Israel
| | - Yoram Soroka
- Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Givat Ram, Jerusalem, Israel
| | - Shahar Weiss
- Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Givat Ram, Jerusalem, Israel
| | - David B Medeiros
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Tamar Avin-Wittenberg
- Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Givat Ram, Jerusalem, Israel
| | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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3
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Lima VF, Freire FBS, Cândido-Sobrinho SA, Porto NP, Medeiros DB, Erban A, Kopka J, Schwarzländer M, Fernie AR, Daloso DM. Unveiling the dark side of guard cell metabolism. Plant Physiol Biochem 2023; 201:107862. [PMID: 37413941 DOI: 10.1016/j.plaphy.2023.107862] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/02/2023] [Accepted: 06/22/2023] [Indexed: 07/08/2023]
Abstract
Evidence suggests that guard cells have higher rate of phosphoenolpyruvate carboxylase (PEPc)-mediated dark CO2 assimilation than mesophyll cells. However, it is unknown which metabolic pathways are activated following dark CO2 assimilation in guard cells. Furthermore, it remains unclear how the metabolic fluxes throughout the tricarboxylic acid (TCA) cycle and associated pathways are regulated in illuminated guard cells. Here we carried out a13C-HCO3 labelling experiment in tobacco guard cells harvested under continuous dark or during the dark-to-light transition to elucidate principles of metabolic dynamics downstream of CO2 assimilation. Most metabolic changes were similar between dark-exposed and illuminated guard cells. However, illumination altered the metabolic network structure of guard cells and increased the 13C-enrichment in sugars and metabolites associated to the TCA cycle. Sucrose was labelled in the dark, but light exposure increased the 13C-labelling and leads to more drastic reductions in the content of this metabolite. Fumarate was strongly labelled under both dark and light conditions, while illumination increased the 13C-enrichment in pyruvate, succinate and glutamate. Only one 13C was incorporated into malate and citrate in either dark or light conditions. Our results indicate that several metabolic pathways are redirected following PEPc-mediated CO2 assimilation in the dark, including gluconeogenesis and the TCA cycle. We further showed that the PEPc-mediated CO2 assimilation provides carbons for gluconeogenesis, the TCA cycle and glutamate synthesis and that previously stored malate and citrate are used to underpin the specific metabolic requirements of illuminated guard cells.
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Affiliation(s)
- Valéria F Lima
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil
| | - Francisco Bruno S Freire
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil
| | - Silvio A Cândido-Sobrinho
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil
| | - Nicole P Porto
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil
| | - David B Medeiros
- Max-Planck-Institute of Molecular Plant Physiology, 14476, Potsdam-Golm, Germany
| | - Alexander Erban
- Max-Planck-Institute of Molecular Plant Physiology, 14476, Potsdam-Golm, Germany
| | - Joachim Kopka
- Max-Planck-Institute of Molecular Plant Physiology, 14476, Potsdam-Golm, Germany
| | - Markus Schwarzländer
- Institute of Plant Biology and Biotechnology, Westfälische-Wilhelms-Universität Münster, D-48143, Münster, Germany
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, 14476, Potsdam-Golm, Germany
| | - Danilo M Daloso
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil.
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Neri-Silva R, Monteiro-Batista RDC, Fonseca-Pereira PD, Nunes MD, Viana-Silva AL, Palhares Ribeiro T, Pérez-Díaz JL, Medeiros DB, Araújo WL, Fernie AR, Nunes-Nesi A. On the Significance of the ADNT1 Carrier in Arabidopsis thaliana under Waterlogging Conditions. Biomolecules 2023; 13:biom13050731. [PMID: 37238601 DOI: 10.3390/biom13050731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 04/20/2023] [Indexed: 05/28/2023] Open
Abstract
Among the adenylate carriers identified in Arabidopsis thaliana, only the AMP/ATP transporter ADNT1 shows increased expression in roots under waterlogging stress conditions. Here, we investigated the impact of a reduced expression of ADNT1 in A. thaliana plants submitted to waterlogging conditions. For this purpose, an adnt1 T-DNA mutant and two ADNT1 antisense lines were evaluated. Following waterlogging, ADNT1 deficiency resulted in a reduced maximum quantum yield of PSII electron transport (significantly for adnt1 and antisense Line 10), indicating a higher impact caused by the stress in the mutants. In addition, ADNT1 deficient lines showed higher levels of AMP in roots under nonstress condition. This result indicates that the downregulation of ADNT1 impacts the levels of adenylates. ADNT1-deficient plants exhibited a differential expression pattern of hypoxia-related genes with an increase in non-fermenting-related-kinase 1 (SnRK1) expression and upregulation of adenylate kinase (ADK) under stress and non-stress conditions. Together, these results indicated that the lower expression of ADNT1 is associated with an early "hypoxic status" due to the perturbation of the adenylate pool caused by reduced AMP import by mitochondria. This perturbation, which is sensed by SnRK1, results in a metabolic reprogramming associated with early induction of the fermentative pathway in ADNT1 deficient plants.
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Affiliation(s)
- Roberto Neri-Silva
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Rita de Cássia Monteiro-Batista
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Paula da Fonseca-Pereira
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Mateus Dias Nunes
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Ana Luiza Viana-Silva
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Tamara Palhares Ribeiro
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Jorge L Pérez-Díaz
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - David B Medeiros
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Wagner L Araújo
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Adriano Nunes-Nesi
- National Institute of Science and Technology on Plant Physiology under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
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5
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Porto NP, Bret RSC, Souza PVL, Cândido-Sobrinho SA, Medeiros DB, Fernie AR, Daloso DM. Thioredoxins regulate the metabolic fluxes throughout the tricarboxylic acid cycle and associated pathways in a light-independent manner. Plant Physiol Biochem 2022; 193:36-49. [PMID: 36323196 DOI: 10.1016/j.plaphy.2022.10.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 10/11/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
The metabolic fluxes throughout the tricarboxylic acid cycle (TCAC) are inhibited in the light by the mitochondrial thioredoxin (TRX) system. However, it is unclear how this system orchestrates the fluxes throughout the TCAC and associated pathways in the dark. Here we carried out a13C-HCO3 labelling experiment in Arabidopsis leaves from wild type (WT) and mutants lacking TRX o1 (trxo1), TRX h2 (trxh2), or both NADPH-dependent TRX reductase A and B (ntra ntrb) exposed to 0, 30 and 60 min of dark or light conditions. No 13C-enrichment in TCAC metabolites in illuminated WT leaves was observed. However, increased succinate content was found in parallel to reductions in Ala in the light, suggesting the latter operates as an alternative carbon source for succinate synthesis. By contrast to WT, all mutants showed substantial changes in the content and 13C-enrichment in TCAC metabolites under both dark and light conditions. Increased 13C-enrichment in glutamine in illuminated trxo1 leaves was also observed, strengthening the idea that TRX o1 restricts in vivo carbon fluxes from glycolysis and the TCAC to glutamine. We further demonstrated that both photosynthetic and gluconeogenic fluxes toward glucose are increased in trxo1 and that the phosphoenolpyruvate carboxylase (PEPc)-mediated 13C-incorporation into malate is higher in trxh2 mutants, as compared to WT. Our results collectively provide evidence that TRX h2 and the mitochondrial NTR/TRX system regulate the metabolic fluxes throughout the TCAC and associated pathways, including glycolysis, gluconeogenesis and the synthesis of glutamine in a light-independent manner.
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Affiliation(s)
- Nicole P Porto
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil
| | - Raissa S C Bret
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil
| | - Paulo V L Souza
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil
| | - Silvio A Cândido-Sobrinho
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil
| | - David B Medeiros
- Max-Planck-Institute of Molecular Plant Physiology, 14476, Potsdam-Golm, Germany
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, 14476, Potsdam-Golm, Germany
| | - Danilo M Daloso
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60451-970, Fortaleza, Ceará, Brazil.
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Pereira AM, Martins AO, Batista-Silva W, Condori-Apfata JA, Nascimento VL, Silva VF, Oliveira LA, Medeiros DB, Martins SCV, Fernie AR, Nunes-Nesi A, Araújo WL. Elevated carbon assimilation and metabolic reprogramming in tomato high pigment mutants support the increased production of pigments. Plant Cell Rep 2022; 41:1907-1929. [PMID: 35833988 DOI: 10.1007/s00299-022-02900-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
High pigment mutants in tomato (Solanum lycopersicum L.), a loss of function in the control of photomorphogenesis, with greater pigment production, show altered growth, greater photosynthesis, and a metabolic reprogramming. High pigment mutations cause plants to be extremely responsive to light and produce excessive pigmentation as well as fruits with high levels of health-beneficial nutrients. However, the association of these traits with changes in the physiology and metabolism of leaves remains poorly understood. Here, we performed a detailed morphophysiological and metabolic characterization of high pigment 1 (hp1) and high pigment 2 (hp2) mutants in tomato (Solanum lycopersicum L. 'Micro-Tom') plants under different sunlight conditions (natural light, 50% shading, and 80% shading). These mutants occur in the DDB1 (hp1) and DET1 (hp2) genes, which are related to the regulation of photomorphogenesis and chloroplast development. Our results demonstrate that these mutations delay plant growth and height, by affecting physiological and metabolic parameters at all stages of plant development. Although the mutants were characterized by higher net CO2 assimilation, lower stomatal limitation, and higher carboxylation rates, with anatomical changes that favour photosynthesis, we found that carbohydrate levels did not increase, indicating a change in the energy flow. Shading minimized the differences between mutants and the wild type or fully reversed them in the phenotype at the metabolic level. Our results indicate that the high levels of pigments in hp1 and hp2 mutants represent an additional energy cost for these plants and that extensive physiological and metabolic reprogramming occurs to support increased pigment biosynthesis.
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Affiliation(s)
- Auderlan M Pereira
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Auxiliadora O Martins
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Willian Batista-Silva
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Jorge A Condori-Apfata
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Vitor L Nascimento
- Setor de Fisiologia Vegetal - Departamento de Biologia, Universidade Federal de Lavras, Lavras, Minas Gerais, 37200-000, Brazil
| | - Victor F Silva
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Leonardo A Oliveira
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - David B Medeiros
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam Golm, Germany
| | - Samuel C V Martins
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam Golm, Germany
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil.
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7
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Barros JAS, Cavalcanti JHF, Pimentel KG, Medeiros DB, Silva JCF, Condori-Apfata JA, Lapidot-Cohen T, Brotman Y, Nunes-Nesi A, Fernie AR, Avin-Wittenberg T, Araújo WL. The significance of WRKY45 transcription factor in metabolic adjustments during dark-induced leaf senescence. Plant Cell Environ 2022; 45:2682-2695. [PMID: 35818668 DOI: 10.1111/pce.14393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 07/01/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
Plants are constantly exposed to environmental changes that affect their performance. Metabolic adjustments are crucial to controlling energy homoeostasis and plant survival, particularly during stress. Under carbon starvation, coordinated reprogramming is initiated to adjust metabolic processes, which culminate in premature senescence. Notwithstanding, the regulatory networks that modulate transcriptional control during low energy remain poorly understood. Here, we show that the WRKY45 transcription factor is highly induced during both developmental and dark-induced senescence. The overexpression of Arabidopsis WRKY45 resulted in an early senescence phenotype characterized by a reduction of maximum photochemical efficiency of photosystem II and chlorophyll levels in the later stages of darkness. The detailed metabolic characterization showed significant changes in amino acids coupled with the accumulation of organic acids in WRKY45 overexpression lines during dark-induced senescence. Furthermore, the markedly upregulation of alternative oxidase (AOX1a, AOX1d) and electron transfer flavoprotein/ubiquinone oxidoreductase (ETFQO) genes suggested that WRKY45 is associated with a dysregulation of mitochondrial signalling and the activation of alternative respiration rather than amino acids catabolism regulation. Collectively our results provided evidence that WRKY45 is involved in the plant metabolic reprogramming following carbon starvation and highlight the potential role of WRKY45 in the modulation of mitochondrial signalling pathways.
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Affiliation(s)
- Jessica A S Barros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - João Henrique F Cavalcanti
- Instituto de Educação, Agricultura e Ambiente, Universidade Federal do Amazonas, Humaitá, Amazonas, Brazil
| | - Karla G Pimentel
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - David B Medeiros
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - José C F Silva
- Departamento de Bioquímica e Biologia Molecular/BIOAGRO, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Jorge A Condori-Apfata
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Taly Lapidot-Cohen
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Yariv Brotman
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Tamar Avin-Wittenberg
- Department of Plant and Environmental Sciences, Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Givat Ram, Jerusalem, Israel
| | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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8
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Medeiros DB, Ishihara H, Guenther M, Rosado de Souza L, Fernie AR, Stitt M, Arrivault S. 13CO2 labeling kinetics in maize reveal impaired efficiency of C4 photosynthesis under low irradiance. Plant Physiol 2022; 190:280-304. [PMID: 35751609 PMCID: PMC9434203 DOI: 10.1093/plphys/kiac306] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/06/2022] [Indexed: 06/01/2023]
Abstract
C4 photosynthesis allows faster photosynthetic rates and higher water and nitrogen use efficiency than C3 photosynthesis, but at the cost of lower quantum yield due to the energy requirement of its biochemical carbon concentration mechanism. It has also been suspected that its operation may be impaired in low irradiance. To investigate fluxes under moderate and low irradiance, maize (Zea mays) was grown at 550 µmol photons m-2 s-l and 13CO2 pulse-labeling was performed at growth irradiance or several hours after transfer to 160 µmol photons m-2 s-1. Analysis by liquid chromatography/tandem mass spectrometry or gas chromatography/mass spectrometry provided information about pool size and labeling kinetics for 32 metabolites and allowed estimation of flux at many steps in C4 photosynthesis. The results highlighted several sources of inefficiency in low light. These included excess flux at phosphoenolpyruvate carboxylase, restriction of decarboxylation by NADP-malic enzyme, and a shift to increased CO2 incorporation into aspartate, less effective use of metabolite pools to drive intercellular shuttles, and higher relative and absolute rates of photorespiration. The latter provides evidence for a lower bundle sheath CO2 concentration in low irradiance, implying that operation of the CO2 concentration mechanism is impaired in this condition. The analyses also revealed rapid exchange of carbon between the Calvin-Benson cycle and the CO2-concentration shuttle, which allows rapid adjustment of the balance between CO2 concentration and assimilation, and accumulation of large amounts of photorespiratory intermediates in low light that provides a major carbon reservoir to build up C4 metabolite pools when irradiance increases.
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Affiliation(s)
| | - Hirofumi Ishihara
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Manuela Guenther
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | | | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Mark Stitt
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
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9
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Hajheidari M, Gerlach N, Dorau K, Omidbakhshfard MA, Pesch L, Hofmann J, Hallab A, Ponce-Soto GY, Kuhalskaya A, Medeiros DB, Bourceret A, Usadel B, Mayer J, Fernie A, Mansfeldt T, Sonnewald U, Bucher M. Crop genetic diversity uncovers metabolites, elements, and gene networks predicted to be associated with high plant biomass yields in maize. PNAS Nexus 2022; 1:pgac068. [PMID: 36741443 PMCID: PMC9896949 DOI: 10.1093/pnasnexus/pgac068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 06/29/2022] [Indexed: 02/07/2023]
Abstract
Rapid population growth and increasing demand for food, feed, and bioenergy in these times of unprecedented climate change require breeding for increased biomass production on the world's croplands. To accelerate breeding programs, knowledge of the relationship between biomass features and underlying gene networks is needed to guide future breeding efforts. To this end, large-scale multiomics datasets were created with genetically diverse maize lines, all grown in long-term organic and conventional cropping systems. Analysis of the datasets, integrated using regression modeling and network analysis revealed key metabolites, elements, gene transcripts, and gene networks, whose contents during vegetative growth substantially influence the build-up of plant biomass in the reproductive phase. We found that S and P content in the source leaf and P content in the root during the vegetative stage contributed the most to predicting plant performance at the reproductive stage. In agreement with the Gene Ontology enrichment analysis, the cis-motifs and identified transcription factors associated with upregulated genes under phosphate deficiency showed great diversity in the molecular response to phosphate deficiency in selected lines. Furthermore, our data demonstrate that genotype-dependent uptake, assimilation, and allocation of essential nutrient elements (especially C and N) during vegetative growth under phosphate starvation plays an important role in determining plant biomass by controlling root traits related to nutrient uptake. These integrative multiomics results revealed key factors underlying maize productivity and open new opportunities for efficient, rapid, and cost-effective plant breeding to increase biomass yield of the cereal crop maize under adverse environmental factors.
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Affiliation(s)
| | - Nina Gerlach
- Institute for Plant Sciences, Cologne Biocenter, Cluster of Excellence on Plant Sciences, University of Cologne, D-50674 Cologne, Germany
| | - Kristof Dorau
- Faculty of Mathematics and Natural Sciences, Department of Geosciences, Institute of Geography, University of Cologne, Albertus‐Magnus‐Platz, D‐50923 Köln, Germany
| | - M Amin Omidbakhshfard
- Max Planck Institute of Molecular Plant Physiology, Department of Molecular Physiology, D-14476 Potsdam-Golm, Germany
| | - Lina Pesch
- Institute for Plant Sciences, Cologne Biocenter, Cluster of Excellence on Plant Sciences, University of Cologne, D-50674 Cologne, Germany
| | - Jörg Hofmann
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Asis Hallab
- Bioinformatics (IBG‐4), Forschungszentrum Jülich GmbH, D‐52425 Jülich, Germany
| | | | - Anastasiya Kuhalskaya
- Max Planck Institute of Molecular Plant Physiology, Department of Molecular Physiology, D-14476 Potsdam-Golm, Germany
| | - David B Medeiros
- Max Planck Institute of Molecular Plant Physiology, Department of Molecular Physiology, D-14476 Potsdam-Golm, Germany
| | | | | | - Björn Usadel
- Bioinformatics (IBG‐4), Forschungszentrum Jülich GmbH, D‐52425 Jülich, Germany,HHU Düsseldorf, Institute of Biological Data Science, Cluster of Excellence on Plant Sciences, D-40225 Düsseldorf, Germany
| | - Jochen Mayer
- Agroscope, Department of Agroecology and Environment, CH-8046 Zurich, Switzerland
| | - Alisdair Fernie
- Max Planck Institute of Molecular Plant Physiology, Department of Molecular Physiology, D-14476 Potsdam-Golm, Germany
| | - Tim Mansfeldt
- Faculty of Mathematics and Natural Sciences, Department of Geosciences, Institute of Geography, University of Cologne, Albertus‐Magnus‐Platz, D‐50923 Köln, Germany
| | - Uwe Sonnewald
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nürnberg, D-91054 Erlangen, Germany
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10
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Lima VF, Erban A, Daubermann AG, Freire FBS, Porto NP, Cândido-Sobrinho SA, Medeiros DB, Schwarzländer M, Fernie AR, Dos Anjos L, Kopka J, Daloso DM. Establishment of a GC-MS-based 13 C-positional isotopomer approach suitable for investigating metabolic fluxes in plant primary metabolism. Plant J 2021; 108:1213-1233. [PMID: 34486764 DOI: 10.1111/tpj.15484] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/20/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
13 C-Metabolic flux analysis (13 C-MFA) has greatly contributed to our understanding of plant metabolic regulation. However, the generation of detailed in vivo flux maps remains a major challenge. Flux investigations based on nuclear magnetic resonance have resolved small networks with high accuracy. Mass spectrometry (MS) approaches have broader potential, but have hitherto been limited in their power to deduce flux information due to lack of atomic level position information. Herein we established a gas chromatography (GC) coupled to MS-based approach that provides 13 C-positional labelling information in glucose, malate and glutamate (Glu). A map of electron impact (EI)-mediated MS fragmentation was created and validated by 13 C-positionally labelled references via GC-EI-MS and GC-atmospheric pressure chemical ionization-MS technologies. The power of the approach was revealed by analysing previous 13 C-MFA data from leaves and guard cells, and 13 C-HCO3 labelling of guard cells harvested in the dark and after the dark-to-light transition. We demonstrated that the approach is applicable to established GC-EI-MS-based 13 C-MFA without the need for experimental adjustment, but will benefit in the future from paired analyses by the two GC-MS platforms. We identified specific glucose carbon atoms that are preferentially labelled by photosynthesis and gluconeogenesis, and provide an approach to investigate the phosphoenolpyruvate carboxylase (PEPc)-derived 13 C-incorporation into malate and Glu. Our results suggest that gluconeogenesis and the PEPc-mediated CO2 assimilation into malate are activated in a light-independent manner in guard cells. We further highlight that the fluxes from glycolysis and PEPc toward Glu are restricted by the mitochondrial thioredoxin system in illuminated leaves.
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Affiliation(s)
- Valéria F Lima
- LabPLant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brazil
| | - Alexander Erban
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, D-14476, Germany
| | - André G Daubermann
- Departamento de Biologia, Setor de Fisiologia Vegetal, Universidade Federal de Lavras, Lavras-MG, 37200-900, Brazil
| | - Francisco Bruno S Freire
- LabPLant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brazil
| | - Nicole P Porto
- LabPLant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brazil
| | - Silvio A Cândido-Sobrinho
- LabPLant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brazil
| | - David B Medeiros
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, D-14476, Germany
| | - Markus Schwarzländer
- Institute of Plant Biology and Biotechnology, Westfälische-Wilhelms-Universität Münster, Münster, D-48143, Germany
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, D-14476, Germany
| | - Leticia Dos Anjos
- Departamento de Biologia, Setor de Fisiologia Vegetal, Universidade Federal de Lavras, Lavras-MG, 37200-900, Brazil
| | - Joachim Kopka
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, D-14476, Germany
| | - Danilo M Daloso
- LabPLant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brazil
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11
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Medeiros DB, Aarabi F, Martinez Rivas FJ, Fernie AR. The knowns and unknowns of intracellular partitioning of carbon and nitrogen, with focus on the organic acid-mediated interplay between mitochondrion and chloroplast. J Plant Physiol 2021; 266:153521. [PMID: 34537467 DOI: 10.1016/j.jplph.2021.153521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/20/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
The presence of specialized cellular compartments in higher plants express an extraordinary degree of intracellular organization, which provides efficient mechanisms to avoid misbalancing of the metabolism. This offers the flexibility by which plants can quickly acclimate to fluctuating environmental conditions. For that, a fine temporal and spatial regulation of metabolic pathways is required and involves several players e.g. organic acids. In this review we discuss different facets of the organic acid metabolism within plant cells with special focus to those related to the interactions between organic acids compartmentalization and the partitioning of carbon and nitrogen. The connections between organic acids and CO2 assimilation, tricarboxylic acid (TCA) cycle, amino acids metabolism, and redox status are highlighted. Moreover, the key enzymes and transporters as well as their function on the coordination of interorganellar metabolic exchanges are discussed.
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Affiliation(s)
- David B Medeiros
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam, Germany.
| | - Fayezeh Aarabi
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam, Germany
| | | | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam, Germany.
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12
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Medeiros DB, Brotman Y, Fernie AR. The utility of metabolomics as a tool to inform maize biology. Plant Commun 2021; 2:100187. [PMID: 34327322 PMCID: PMC8299083 DOI: 10.1016/j.xplc.2021.100187] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 03/26/2021] [Accepted: 04/19/2021] [Indexed: 05/04/2023]
Abstract
With the rise of high-throughput omics tools and the importance of maize and its products as food and bioethanol, maize metabolism has been extensively explored. Modern maize is still rich in genetic and phenotypic variation, yielding a wide range of structurally and functionally diverse metabolites. The maize metabolome is also incredibly dynamic in terms of topology and subcellular compartmentalization. In this review, we examine a broad range of studies that cover recent developments in maize metabolism. Particular attention is given to current methodologies and to the use of metabolomics as a tool to define biosynthetic pathways and address biological questions. We also touch upon the use of metabolomics to understand maize natural variation and evolution, with a special focus on research that has used metabolite-based genome-wide association studies (mGWASs).
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Affiliation(s)
- David B. Medeiros
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
| | - Yariv Brotman
- Department of Life Sciences, Ben-Gurion University of the Negev, Beersheva, Israel
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13
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Pérez-Díaz J, Batista-Silva W, Almada R, Medeiros DB, Arrivault S, Correa F, Bastías A, Rojas P, Beltrán MF, Pozo MF, Araújo WL, Sagredo B. Prunus Hexokinase 3 genes alter primary C-metabolism and promote drought and salt stress tolerance in Arabidopsis transgenic plants. Sci Rep 2021; 11:7098. [PMID: 33782506 PMCID: PMC8007757 DOI: 10.1038/s41598-021-86535-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 03/15/2021] [Indexed: 11/08/2022] Open
Abstract
Hexokinases (HXKs) and fructokinases (FRKs) are the only two families of enzymes in plants that have been identified as able to phosphorylate Glucose (Glc) and Fructose (Fru). Glc can only be phosphorylated in plants by HXKs, while Fru can be phosphorylated by either HXKs or FRKs. The various subcellular localizations of HXKs in plants indicate that they are involved in diverse functions, including anther dehiscence and pollen germination, stomatal closure in response to sugar levels, stomatal aperture and reducing transpiration. Its association with modulating programmed cell death, and responses to oxidative stress and pathogen infection (abiotic and biotic stresses) also have been reported. To extend our understanding about the function of HXK-like genes in the response of Prunus rootstocks to abiotic stress, we performed a detailed bioinformatic and functional analysis of hexokinase 3-like genes (HXK3s) from two Prunus rootstock genotypes, 'M.2624' (Prunus cerasifera Ehrh × P. munsoniana W.Wight & Hedrick) and 'M.F12/1' (P. avium L.), which are tolerant and sensitive to hypoxia stress, respectively. A previous large-scale transcriptome sequencing of roots of these rootstocks, showed that this HXK3-like gene that was highly induced in the tolerant genotype under hypoxia conditions. In silico analysis of gene promoters from M.2624 and M.F12/1 genotypes revealed regulatory elements that could explain differential transcriptional profiles of HXK3 genes. Subcellular localization was determinates by both bioinformatic prediction and expression of their protein fused to the green fluorescent protein (GFP) in protoplasts and transgenic plants of Arabidopsis. Both approaches showed that they are expressed in plastids. Metabolomics analysis of Arabidopsis plants ectopically expressing Prunus HXK3 genes revealed that content of several metabolites including phosphorylated sugars (G6P), starch and some metabolites associated with the TCA cycle were affected. These transgenic Arabidopsis plants showed improved tolerance to salt and drought stress under growth chamber conditions. Our results suggest that Prunus HXK3 is a potential candidate for enhancing tolerance to salt and drought stresses in stone fruit trees and other plants.
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Affiliation(s)
- Jorge Pérez-Díaz
- Instituto de Investigaciones Agropecuarias CRI Rayentué, Av. Salamanca s/n, Sector Los Choapinos, Rengo, Chile
| | - Willian Batista-Silva
- Max Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Rubén Almada
- Centro de Estudios Avanzados en Fruticultura, CEAF, Camino Las Parcelas 882, Sector Los Choapinos, Rengo, Chile
| | - David B Medeiros
- Max Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Stéphanie Arrivault
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Francisco Correa
- Instituto de Investigaciones Agropecuarias CRI Rayentué, Av. Salamanca s/n, Sector Los Choapinos, Rengo, Chile
| | - Adriana Bastías
- Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Providencia, Santiago, Chile
| | - Pamela Rojas
- Instituto de Investigaciones Agropecuarias CRI Rayentué, Av. Salamanca s/n, Sector Los Choapinos, Rengo, Chile
| | - María Francisca Beltrán
- Instituto de Investigaciones Agropecuarias CRI Rayentué, Av. Salamanca s/n, Sector Los Choapinos, Rengo, Chile
| | - María Francisca Pozo
- Instituto de Investigaciones Agropecuarias CRI Rayentué, Av. Salamanca s/n, Sector Los Choapinos, Rengo, Chile
| | - Wagner L Araújo
- Max Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Boris Sagredo
- Instituto de Investigaciones Agropecuarias CRI Rayentué, Av. Salamanca s/n, Sector Los Choapinos, Rengo, Chile.
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14
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Feitosa-Araujo E, da Fonseca-Pereira P, Pena MM, Medeiros DB, Perez de Souza L, Yoshida T, Weber APM, Araújo WL, Fernie AR, Schwarzländer M, Nunes-Nesi A. Changes in intracellular NAD status affect stomatal development in an abscisic acid-dependent manner. Plant J 2020; 104:1149-1168. [PMID: 32996222 DOI: 10.1111/tpj.15000] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 08/05/2020] [Accepted: 09/08/2020] [Indexed: 06/11/2023]
Abstract
Nicotinamide adenine dinucleotide (NAD) plays a central role in redox metabolism in all domains of life. Additional roles in regulating posttranslational protein modifications and cell signaling implicate NAD as a potential integrator of central metabolism and programs regulating stress responses and development. Here we found that NAD negatively impacts stomatal development in cotyledons of Arabidopsis thaliana. Plants with reduced capacity for NAD+ transport from the cytosol into the mitochondria or the peroxisomes exhibited reduced numbers of stomatal lineage cells and reduced stomatal density. Cotyledons of plants with reduced NAD+ breakdown capacity and NAD+ -treated cotyledons also presented reduced stomatal number. Expression of stomatal lineage-related genes was repressed in plants with reduced expression of NAD+ transporters as well as in plants treated with NAD+ . Impaired NAD+ transport was further associated with an induction of abscisic acid (ABA)-responsive genes. Inhibition of ABA synthesis rescued the stomatal phenotype in mutants deficient in intracellular NAD+ transport, whereas exogenous NAD+ feeding of aba-2 and ost1 seedlings, impaired in ABA synthesis and ABA signaling, respectively, did not impact stomatal number, placing NAD upstream of ABA. Additionally, in vivo measurement of ABA dynamics in seedlings of an ABA-specific optogenetic reporter - ABAleon2.1 - treated with NAD+ showed increases in ABA content suggesting that NAD+ impacts on stomatal development through ABA synthesis and signaling. Our results demonstrate that intracellular NAD+ homeostasis as set by synthesis, breakdown and transport is essential for normal stomatal development, and provide a link between central metabolism, hormone signaling and developmental plasticity.
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Affiliation(s)
- Elias Feitosa-Araujo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
- Institute of Plant Biology and Biotechnology, University of Münster, Schlossplatz 8, Münster, 48143, Germany
| | - Paula da Fonseca-Pereira
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Mateus M Pena
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - David B Medeiros
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
| | - Leonardo Perez de Souza
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
| | - Takuya Yoshida
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
| | - Andreas P M Weber
- Department of Plant Biochemistry, Heinrich Heine University Düsseldorf, Düsseldorf, 40225, Germany
| | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
| | - Markus Schwarzländer
- Institute of Plant Biology and Biotechnology, University of Münster, Schlossplatz 8, Münster, 48143, Germany
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
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15
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Lana-Costa J, de Oliveira Silva FM, Batista-Silva W, Carolino DC, Senra RL, Medeiros DB, Martins SCV, Gago J, Araújo WL, Nunes-Nesi A. High Photosynthetic Rates in a Solanum pennellii Chromosome 2 QTL Is Explained by Biochemical and Photochemical Changes. Front Plant Sci 2020; 11:794. [PMID: 32595679 PMCID: PMC7303335 DOI: 10.3389/fpls.2020.00794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/19/2020] [Indexed: 05/09/2023]
Abstract
Enhanced photosynthesis is strictly associated with to productivity and it can be accomplished by genetic approaches through identification of genetic variation. By using a Solanum pennellii introgression lines (ILs) population, it was previously verified that, under normal (CO2), IL 2-5 and 2-6 display increased photosynthetic rates by up to 20% in comparison with their parental background (M82). However, the physiological mechanisms involved in the enhanced CO2 assimilation exhibited by these lines remained unknown, precluding their use for further biotechnological applications. Thereby, here we attempted to uncover the physiological factors involved in the upregulation of photosynthesis in ILs 2-5 and 2-6 under normal (CO2) as well as under elevated (CO2). The results provide evidence for increased biochemical capacity (higher maximum carboxylation velocity and maximum electron transport rate) in plants from IL 2-5 and 2-6, whereas the diffusive components (stomatal and mesophyll conductances) were unaltered in these ILs in comparison to M82. Our analyses revealed that the higher photosynthetic rate observed in these ILs was associated with higher levels of starch as well as total protein levels, specially increased RuBisCO content. Further analyses performed in plants under high (CO2) confirmed that biochemical properties are involved in genetic variation on chromosome 2 related to enhanced photosynthesis.
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Affiliation(s)
- Jaciara Lana-Costa
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | | | | | - Diego Costa Carolino
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Renato Lima Senra
- Departamento de Bioquímica Aplicada, Universidade Federal de Viçosa, Viçosa, Brazil
| | - David B. Medeiros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | | | - Jorge Gago
- Departament de Biologia, Institute of Agro-Environmental Research and Water Economy – INAGEA, Universitat de les Illes Balears, Palma, Spain
| | - Wagner L. Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
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16
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Medeiros DB, Barros JAS, Fernie AR, Araújo WL. Eating Away at ROS to Regulate Stomatal Opening. Trends Plant Sci 2020; 25:220-223. [PMID: 31932167 DOI: 10.1016/j.tplants.2019.12.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/17/2019] [Accepted: 12/20/2019] [Indexed: 05/20/2023]
Abstract
Although reactive oxygen species (ROS) function in guard cell signaling has been demonstrated, the control of ROS homeostasis remains elusive. Recent findings point to multiple mechanisms controlling ROS levels in guard cells. These mechanisms require secondary metabolism and autophagy, providing the guard cells with a degree of plasticity during stomatal movements.
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Affiliation(s)
- David B Medeiros
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany.
| | - Jessica A S Barros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil.
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17
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de Souza Chaves I, Feitosa-Araújo E, Florian A, Medeiros DB, da Fonseca‐Pereira P, Charton L, Heyneke E, Apfata JA, Pires MV, Mettler‐Altmann T, Araújo WL, Neuhaus HE, Palmieri F, Obata T, Weber AP, Linka N, Fernie AR, Nunes‐Nesi A. The mitochondrial NAD + transporter (NDT1) plays important roles in cellular NAD + homeostasis in Arabidopsis thaliana. Plant J 2019; 100:487-504. [PMID: 31278825 PMCID: PMC6900047 DOI: 10.1111/tpj.14452] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 06/14/2019] [Accepted: 06/26/2019] [Indexed: 05/20/2023]
Abstract
Nicotinamide adenine dinucleotide (NAD+ ) is an essential coenzyme required for all living organisms. In eukaryotic cells, the final step of NAD+ biosynthesis is exclusively cytosolic. Hence, NAD+ must be imported into organelles to support their metabolic functions. Three NAD+ transporters belonging to the mitochondrial carrier family (MCF) have been biochemically characterized in plants. AtNDT1 (At2g47490), focus of the current study, AtNDT2 (At1g25380), targeted to the inner mitochondrial membrane, and AtPXN (At2g39970), located in the peroxisomal membrane. Although AtNDT1 was presumed to reside in the chloroplast membrane, subcellular localization experiments with green fluorescent protein (GFP) fusions revealed that AtNDT1 locates exclusively in the mitochondrial membrane in stably transformed Arabidopsis plants. To understand the biological function of AtNDT1 in Arabidopsis, three transgenic lines containing an antisense construct of AtNDT1 under the control of the 35S promoter alongside a T-DNA insertional line were evaluated. Plants with reduced AtNDT1 expression displayed lower pollen viability, silique length, and higher rate of seed abortion. Furthermore, these plants also exhibited an increased leaf number and leaf area concomitant with higher photosynthetic rates and higher levels of sucrose and starch. Therefore, lower expression of AtNDT1 was associated with enhanced vegetative growth but severe impairment of the reproductive stage. These results are discussed in the context of the mitochondrial localization of AtNDT1 and its important role in the cellular NAD+ homeostasis for both metabolic and developmental processes in plants.
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Affiliation(s)
- Izabel de Souza Chaves
- Max Planck Partner GroupDepartamento de Biologia VegetalUniversidade Federal de Viçosa36570‐900ViçosaMinas GeraisBrazil
| | - Elias Feitosa-Araújo
- Max Planck Partner GroupDepartamento de Biologia VegetalUniversidade Federal de Viçosa36570‐900ViçosaMinas GeraisBrazil
| | - Alexandra Florian
- Max‐Planck‐Institute of Molecular Plant Physiology Am Mühlenberg 114476Potsdam‐GolmGermany
| | - David B. Medeiros
- Max Planck Partner GroupDepartamento de Biologia VegetalUniversidade Federal de Viçosa36570‐900ViçosaMinas GeraisBrazil
| | - Paula da Fonseca‐Pereira
- Max Planck Partner GroupDepartamento de Biologia VegetalUniversidade Federal de Viçosa36570‐900ViçosaMinas GeraisBrazil
| | - Lennart Charton
- Department of Plant BiochemistryHeinrich Heine University Düsseldorf40225DüsseldorfGermany
| | - Elmien Heyneke
- Max‐Planck‐Institute of Molecular Plant Physiology Am Mühlenberg 114476Potsdam‐GolmGermany
| | - Jorge A.C. Apfata
- Max Planck Partner GroupDepartamento de Biologia VegetalUniversidade Federal de Viçosa36570‐900ViçosaMinas GeraisBrazil
| | - Marcel V. Pires
- Max Planck Partner GroupDepartamento de Biologia VegetalUniversidade Federal de Viçosa36570‐900ViçosaMinas GeraisBrazil
| | - Tabea Mettler‐Altmann
- Department of Plant BiochemistryHeinrich Heine University Düsseldorf40225DüsseldorfGermany
| | - Wagner L. Araújo
- Max Planck Partner GroupDepartamento de Biologia VegetalUniversidade Federal de Viçosa36570‐900ViçosaMinas GeraisBrazil
| | - H. Ekkehard Neuhaus
- Department of Plant PhysiologyUniversity of KaiserslauternD‐67663KaiserslauternGermany
| | - Ferdinando Palmieri
- Department of Biosciences, Biotechnology and BiopharmaceuticsUniversity of Bari70125BariItaly
| | - Toshihiro Obata
- Max‐Planck‐Institute of Molecular Plant Physiology Am Mühlenberg 114476Potsdam‐GolmGermany
| | - Andreas P.M. Weber
- Department of Plant BiochemistryHeinrich Heine University Düsseldorf40225DüsseldorfGermany
| | - Nicole Linka
- Department of Plant BiochemistryHeinrich Heine University Düsseldorf40225DüsseldorfGermany
| | - Alisdair R. Fernie
- Max‐Planck‐Institute of Molecular Plant Physiology Am Mühlenberg 114476Potsdam‐GolmGermany
| | - Adriano Nunes‐Nesi
- Max Planck Partner GroupDepartamento de Biologia VegetalUniversidade Federal de Viçosa36570‐900ViçosaMinas GeraisBrazil
- Max‐Planck‐Institute of Molecular Plant Physiology Am Mühlenberg 114476Potsdam‐GolmGermany
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18
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Medeiros DB, Arrivault S, Alpers J, Fernie AR, Aarabi F. Non-aqueous Fractionation (NAF) for Metabolite Analysis in Subcellular Compartments of Arabidopsis Leaf Tissues. Bio Protoc 2019; 9:e3399. [PMID: 33654900 DOI: 10.21769/bioprotoc.3399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/17/2019] [Accepted: 09/28/2019] [Indexed: 11/02/2022] Open
Abstract
The accurate determination of metabolite distribution in subcellular compartments is still challenging in plant science. Various methodologies, such as fluorescence resonance energy transfer-based technology, nuclear magnetic resonance spectroscopy and protoplast fractionation allow the study of metabolite compartmentation. However, large changes in metabolite levels occur during such procedures. Therefore, the non-aqueous fractionation (NAF) technique is currently the best method for the study of in-vivo metabolite distribution. Our protocol presents a detailed workflow including the NAF procedure and quantification of compartment-specific markers for three subcellular compartments: ADP glucose pyrophosphorylase (AGPase) as plastidic marker, phosphoenolpyruvate carboxylase (PEPC) as cytosolic marker, and nitrate and acid invertase as vacuolar markers.
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Affiliation(s)
- David B Medeiros
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476, Potsdam-Golm, Germany
| | - Stéphanie Arrivault
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476, Potsdam-Golm, Germany
| | - Jessica Alpers
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476, Potsdam-Golm, Germany
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476, Potsdam-Golm, Germany
| | - Fayezeh Aarabi
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476, Potsdam-Golm, Germany
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19
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Lima VF, Anjos LD, Medeiros DB, Cândido-Sobrinho SA, Souza LP, Gago J, Fernie AR, Daloso DM. The sucrose-to-malate ratio correlates with the faster CO 2 and light stomatal responses of angiosperms compared to ferns. New Phytol 2019; 223:1873-1887. [PMID: 31099898 DOI: 10.1111/nph.15927] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 05/13/2019] [Indexed: 05/24/2023]
Abstract
Stomatal responses to environmental signals differ substantially between ferns and angiosperms. However, the mechanisms that lead to such different responses remain unclear. Here we investigated the extent to which leaf metabolism contributes to coordinate the differential stomatal behaviour among ferns and angiosperms. Stomata from all species were responsive to light and CO2 transitions. However, fern stomatal responses were slower and minor in both absolute and relative terms. Angiosperms have higher stomatal density, but this is not correlated with speed of stomatal closure. The metabolic responses throughout the diel course and under different CO2 conditions differ substantially among ferns and angiosperms. Higher sucrose content and an increased sucrose-to-malate ratio during high CO2 -induced stomatal closure was observed in angiosperms compared to ferns. Furthermore, the speed of stomatal closure was positively and negatively correlated with sugars and organic acids, respectively, suggesting that the balance between sugars and organic acids aids in explaining the faster stomatal responses of angiosperms. Our results suggest that mesophyll-derived metabolic signals, especially those associated with sucrose and malate, may also be important to modulate the differential stomatal behaviour between ferns and angiosperms, providing important new information that helps in understanding the metabolism-mediated mechanisms regulating stomatal movements across land plant evolution.
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Affiliation(s)
- Valéria F Lima
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brasil
| | - Letícia Dos Anjos
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brasil
- Departamento de Biologia, Setor de Fisiologia Vegetal, Universidade Federal de Lavras, Lavras-MG, 37200-000, Brasil
| | - David B Medeiros
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
| | - Silvio A Cândido-Sobrinho
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brasil
| | - Leonardo P Souza
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
| | - Jorge Gago
- Grupo de Biología de las Plantas en Condiciones Mediterráneas, Departamento de Biología, Universidad de las Islas Baleares/Instituto de investigaciones Agroambientales y de la Economía del Agua (INAGEA), Palma de Mallorca, 07122, Islas Baleares, España
| | - Alisdair R Fernie
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
| | - Danilo M Daloso
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza-CE, 60451-970, Brasil
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20
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Pérez-Díaz J, Pérez-Díaz JR, Medeiros DB, Zuther E, Hong CY, Nunes-Nesi A, Hincha DK, Ruiz-Lara S, Casaretto JA. Transcriptome analysis reveals potential roles of a barley ASR gene that confers stress tolerance in transgenic rice. J Plant Physiol 2019; 238:29-39. [PMID: 31129469 DOI: 10.1016/j.jplph.2019.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 05/29/2023]
Abstract
Control of gene expression and induction of cellular protection mechanisms are two important processes that plants employ to protect themselves against abiotic stresses. ABA-, stress, and ripening-induced (ASR) proteins have been identified to participate in such responses. Previous studies have proposed that these proteins can act as transcription factors and as molecular chaperones protecting transgenic plants against stresses; however a gene network regulated by ASRs has not been explored. To expand our knowledge on the function of these proteins in cereals, we present the functional characterization of a barley ASR gene. Expression of HvASR5 was almost ubiquitous in different organs and responded to ABA and to different stress treatments. When expressed ectopically, HvASR5 was able to confer drought and salt stress tolerance to Arabidopsis thaliana and to improve growth performance of rice plants under stress conditions. A transcriptomic analysis with two transgenic rice lines overexpressing HvASR5 helped to identify potential downstream targets and understand ASR-regulated cellular processes. HvASR5 up-regulated the expression of a distinct set of genes associated with stress responses, metabolic processes (particularly carbohydrate metabolism), as well as reproduction and development. These data, together with the confirmed nuclear and cytoplasmic localization of HvASR5, further support the hypothesis that HvASR5 can also carry out roles as molecular protector and transcriptional regulator.
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Affiliation(s)
- Jorge Pérez-Díaz
- Instituto de Ciencias Biológicas, Universidad de Talca, Talca, Chile
| | | | - David B Medeiros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais 36570-900, Brazil
| | - Ellen Zuther
- Max-Planck-Institute of Molecular Plant Physiology, 14476, Potsdam-Golm, Germany
| | - Chwan-Yang Hong
- Department of Agricultural Chemistry, National Taiwan University, Taipei, 10617, Taiwan
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais 36570-900, Brazil
| | - Dirk K Hincha
- Max-Planck-Institute of Molecular Plant Physiology, 14476, Potsdam-Golm, Germany
| | - Simón Ruiz-Lara
- Instituto de Ciencias Biológicas, Universidad de Talca, Talca, Chile
| | - José A Casaretto
- Instituto de Ciencias Biológicas, Universidad de Talca, Talca, Chile; Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
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21
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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. J Exp Bot 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] [What about the content of this article? (0)] [Affiliation(s)] [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.
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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:
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22
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Batista-Silva W, Medeiros DB, Rodrigues-Salvador A, Daloso DM, Omena-Garcia RP, Oliveira FS, Pino LE, Peres LEP, Nunes-Nesi A, Fernie AR, Zsögön A, Araújo WL. Modulation of auxin signalling through DIAGETROPICA and ENTIRE differentially affects tomato plant growth via changes in photosynthetic and mitochondrial metabolism. Plant Cell Environ 2019; 42:448-465. [PMID: 30066402 DOI: 10.1111/pce.13413] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 07/17/2018] [Accepted: 07/20/2018] [Indexed: 06/08/2023]
Abstract
Auxin modulates a range of plant developmental processes including embryogenesis, organogenesis, and shoot and root development. Recent studies have shown that plant hormones also strongly influence metabolic networks, which results in altered growth phenotypes. Modulating auxin signalling pathways may therefore provide an opportunity to alter crop performance. Here, we performed a detailed physiological and metabolic characterization of tomato (Solanum lycopersicum) mutants with either increased (entire) or reduced (diageotropica-dgt) auxin signalling to investigate the consequences of altered auxin signalling on photosynthesis, water use, and primary metabolism. We show that reduced auxin sensitivity in dgt led to anatomical and physiological modifications, including altered stomatal distribution along the leaf blade and reduced stomatal conductance, resulting in clear reductions in both photosynthesis and water loss in detached leaves. By contrast, plants with higher auxin sensitivity (entire) increased the photosynthetic capacity, as deduced by higher Vcmax and Jmax coupled with reduced stomatal limitation. Remarkably, our results demonstrate that auxin-sensitive mutants (dgt) are characterized by impairments in the usage of starch that led to lower growth, most likely associated with decreased respiration. Collectively, our findings suggest that mutations in different components of the auxin signalling pathway specifically modulate photosynthetic and respiratory processes.
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Affiliation(s)
- Willian Batista-Silva
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - David B Medeiros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Acácio Rodrigues-Salvador
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Danilo M Daloso
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Rebeca P Omena-Garcia
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Franciele Santos Oliveira
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Lilian Ellen Pino
- Departmento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Lázaro Eustáquio Pereira Peres
- Departmento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Alisdair R Fernie
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Agustín Zsögön
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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23
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Batista-Silva W, Nascimento VL, Medeiros DB, Nunes-Nesi A, Ribeiro DM, Zsögön A, Araújo WL. Modifications in Organic Acid Profiles During Fruit Development and Ripening: Correlation or Causation? Front Plant Sci 2018; 9:1689. [PMID: 30524461 PMCID: PMC6256983 DOI: 10.3389/fpls.2018.01689] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 10/31/2018] [Indexed: 05/21/2023]
Abstract
The pivotal role of phytohormones during fruit development and ripening is considered established knowledge in plant biology. Perhaps less well-known is the growing body of evidence suggesting that organic acids play a key function in plant development and, in particular, in fruit development, maturation and ripening. Here, we critically review the connection between organic acids and the development of both climacteric and non-climacteric fruits. By analyzing the metabolic content of different fruits during their ontogenetic trajectory, we noticed that the content of organic acids in the early stages of fruit development is directly related to the supply of substrates for respiratory processes. Although different organic acid species can be found during fruit development in general, it appears that citrate and malate play major roles in this process, as they accumulate on a broad range of climacteric and non-climacteric fruits. We further highlight the functional significance of changes in organic acid profile in fruits due to either the manipulation of fruit-specific genes or the use of fruit-specific promoters. Despite the complexity behind the fluctuation in organic acid content during fruit development and ripening, we extend our understanding on the importance of organic acids on fruit metabolism and the need to further boost future research. We suggest that engineering organic acid metabolism could improve both qualitative and quantitative traits of crop fruits.
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Affiliation(s)
- Willian Batista-Silva
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Vitor L. Nascimento
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | - David B. Medeiros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Dimas M. Ribeiro
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Agustín Zsögön
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Wagner L. Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
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24
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Yoshida T, Anjos LD, Medeiros DB, Araújo WL, Fernie AR, Daloso DM. Insights into ABA-mediated regulation of guard cell primary metabolism revealed by systems biology approaches. Prog Biophys Mol Biol 2018; 146:37-49. [PMID: 30447225 DOI: 10.1016/j.pbiomolbio.2018.11.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/02/2018] [Accepted: 11/13/2018] [Indexed: 01/08/2023]
Abstract
Despite the fact that guard cell abscisic acid (ABA) signalling pathway is well documented, our understanding concerning how and to which extent ABA regulates guard cell metabolism remains fragmentary. Here we have adopted different systems approaches to investigate how ABA modulates guard cell central metabolism by providing genes that are possibly ABA-regulated. By using previous published Arabidopsis guard cell transcript profiling data, we carried out an extensive co-expression network analysis using ABA-related genes and those related to the metabolism and transport of sugars, starch and organic acids. Next, we investigated the presence of ABA responsive elements (ABRE) in the promoter of genes that are highly expressed in guard cells, responsive to ABA and co-expressed with ABA-related genes. Together, these analyses indicated that 44 genes are likely regulated by ABA and 8 of them are highly expressed in guard cells in both the presence and absence of ABA, including genes of the tricarboxylic acid cycle and those related to sucrose and hexose transport and metabolism. It seems likely that ABA may modulate both sucrose transport through guard cell plasma membrane and sucrose metabolism within guard cells. In this context, genes associated with sucrose synthase, sucrose phosphate synthase, trehalose-6-phosphate, invertase, UDP-glucose epimerase/pyrophosphorylase and different sugar transporters contain ABRE in their promoter and are thus possibly ABA regulated. Although validation experiments are required, our study highlights the importance of systems biology approaches to drive new hypothesis and to unravel genes and pathways that are regulated by ABA in guard cells.
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Affiliation(s)
- Takuya Yoshida
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam, Golm, 14476, Germany.
| | - Letícia Dos Anjos
- Departamento de Biologia Vegetal, Universidade Federal de Lavras, Lavras, Minas Gerais, 62700-000, Brazil
| | - David B Medeiros
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam, Golm, 14476, Germany; Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Wagner L Araújo
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam, Golm, 14476, Germany
| | - Danilo M Daloso
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, 60451-970, Brazil.
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25
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Medeiros DB, Fernie AR, Araújo WL. Discriminating the Function(s) of Guard Cell ALMT Channels. Trends Plant Sci 2018; 23:649-651. [PMID: 29937128 DOI: 10.1016/j.tplants.2018.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/08/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
It has been demonstrated that ALMT (ALUMINUM-ACTIVATED MALATE TRANSPORTER) channels are important players during stomatal movements. Previous investigations on ALMT family members indicated possible redundancy at the guard cell tonoplast; however, compelling evidence has recently suggested regulatory mechanisms and individual roles for specific ALMT proteins in response to diverse environmental stimuli.
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Affiliation(s)
- David B Medeiros
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany; Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil.
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Wagner L Araújo
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil.
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26
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Medeiros DB, Perez Souza L, Antunes WC, Araújo WL, Daloso DM, Fernie AR. Sucrose breakdown within guard cells provides substrates for glycolysis and glutamine biosynthesis during light-induced stomatal opening. Plant J 2018. [PMID: 29543357 DOI: 10.1111/tpj.13889] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Sucrose has long been thought to play an osmolytic role in stomatal opening. However, recent evidence supports the idea that the role of sucrose in this process is primarily energetic. Here we used a combination of stomatal aperture assays and kinetic [U-13 C]-sucrose isotope labelling experiments to confirm that sucrose is degraded during light-induced stomatal opening and to define the fate of the C released from sucrose breakdown. We additionally show that addition of sucrose to the medium did not enhance light-induced stomatal opening. The isotope experiment showed a consistent 13 C enrichment in fructose and glucose, indicating that during light-induced stomatal opening sucrose is indeed degraded. We also observed a clear 13 C enrichment in glutamate and glutamine (Gln), suggesting a concerted activation of sucrose degradation, glycolysis and the tricarboxylic acid cycle. This is in contrast to the situation for Gln biosynthesis in leaves under light, which has been demonstrated to rely on previously stored C. Our results thus collectively allow us to redraw current models concerning the influence of sucrose during light-induced stomatal opening, in which, instead of being accumulated, sucrose is degraded providing C skeletons for Gln biosynthesis.
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Affiliation(s)
- David B Medeiros
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Leonardo Perez Souza
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
| | - Werner C Antunes
- Departamento de Biologia, Universidade Estadual de Maringá, Maringá, Paraná, 87020-900, Brazil
| | - Wagner L Araújo
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Danilo M Daloso
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, 60440-970, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
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Daloso DM, Medeiros DB, Dos Anjos L, Yoshida T, Araújo WL, Fernie AR. Metabolism within the specialized guard cells of plants. New Phytol 2017; 216:1018-1033. [PMID: 28984366 DOI: 10.1111/nph.14823] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 08/21/2017] [Indexed: 05/21/2023]
Abstract
Contents 1018 I. 1018 II. 1019 III. 1022 IV. 1025 V. 1026 VI. 1029 1030 References 1030 SUMMARY: Stomata are leaf epidermal structures consisting of two guard cells surrounding a pore. Changes in the aperture of this pore regulate plant water-use efficiency, defined as gain of C by photosynthesis per leaf water transpired. Stomatal aperture is actively regulated by reversible changes in guard cell osmolyte content. Despite the fact that guard cells can photosynthesize on their own, the accumulation of mesophyll-derived metabolites can seemingly act as signals which contribute to the regulation of stomatal movement. It has been shown that malate can act as a signalling molecule and a counter-ion of potassium, a well-established osmolyte that accumulates in the vacuole of guard cells during stomatal opening. By contrast, their efflux from guard cells is an important mechanism during stomatal closure. It has been hypothesized that the breakdown of starch, sucrose and lipids is an important mechanism during stomatal opening, which may be related to ATP production through glycolysis and mitochondrial metabolism, and/or accumulation of osmolytes such as sugars and malate. However, experimental evidence supporting this theory is lacking. Here we highlight the particularities of guard cell metabolism and discuss this in the context of the guard cells themselves and their interaction with the mesophyll cells.
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Affiliation(s)
- Danilo M Daloso
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, 60451-970, Brasil
| | - David B Medeiros
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil
| | - Letícia Dos Anjos
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, 60451-970, Brasil
| | - Takuya Yoshida
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
| | - Wagner L Araújo
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
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28
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Barros JAS, Cavalcanti JHF, Medeiros DB, Nunes-Nesi A, Avin-Wittenberg T, Fernie AR, Araújo WL. Commonalities and differences in plants deficient in autophagy and alternative pathways of respiration on response to extended darkness. Plant Signal Behav 2017; 12:e1377877. [PMID: 28933654 PMCID: PMC5703242 DOI: 10.1080/15592324.2017.1377877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Autophagy is a highly conserved cellular mechanism in eukaryotes allowing the degradation of cell constituents. It is of crucial significance in both cellular homeostasis and nutrient recycling. During energy limited conditions plant cells can metabolize alternative respiratory substrates, such as amino acids, providing electrons to the mitochondrial metabolism via the tricarboxylic acid (TCA) cycle or electron transfer flavoprotein/ electron transfer flavoprotein ubiquinone oxidoreductase (ETF/ETFQO) system. Our recent study reveals the importance of autophagy in the supply of amino acids to provide energy through alternative pathways of respiration during carbon starvation. This fact apart, autophagy seems to have more generalized effects related not only to amino acid catabolism but also to metabolism in general. By further comparing the metabolic data obtained with atg mutants with those of mutants involved in the alternative pathways of respiration, we observed clear differences between these mutants, pointing out additional effects of the autophagy deficiency on metabolism of Arabidopsis leaves. Collectively, our data point to an interdependence between mitochondrial metabolism and autophagy and suggest an exquisite regulation of primary metabolism under low energetic conditions.
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Affiliation(s)
- Jessica A. S. Barros
- Max Planck Partner group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - João Henrique F. Cavalcanti
- Max Planck Partner group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - David B. Medeiros
- Max Planck Partner group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Adriano Nunes-Nesi
- Max Planck Partner group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Tamar Avin-Wittenberg
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam-Golm, Germany
- Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Givat Ram, Jerusalem, Israel
| | - Alisdair R. Fernie
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam-Golm, Germany
| | - Wagner L. Araújo
- Max Planck Partner group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- CONTACT Wagner L. Araújo Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570–900 Viçosa, Minas Gerais, Brazil
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29
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Medeiros DB, Barros KA, Barros JAS, Omena-Garcia RP, Arrivault S, Sanglard LMVP, Detmann KC, Silva WB, Daloso DM, DaMatta FM, Nunes-Nesi A, Fernie AR, Araújo WL. Impaired Malate and Fumarate Accumulation Due to the Mutation of the Tonoplast Dicarboxylate Transporter Has Little Effects on Stomatal Behavior. Plant Physiol 2017; 175:1068-1081. [PMID: 28899959 PMCID: PMC5664473 DOI: 10.1104/pp.17.00971] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/10/2017] [Indexed: 05/21/2023]
Abstract
Malate is a central metabolite involved in a multiplicity of plant metabolic pathways, being associated with mitochondrial metabolism and playing significant roles in stomatal movements. Vacuolar malate transport has been characterized at the molecular level and is performed by at least one carrier protein and two channels in Arabidopsis (Arabidopsis thaliana) vacuoles. The absence of the Arabidopsis tonoplast Dicarboxylate Transporter (tDT) in the tdt knockout mutant was associated previously with an impaired accumulation of malate and fumarate in leaves. Here, we investigated the consequences of this lower accumulation on stomatal behavior and photosynthetic capacity as well as its putative metabolic impacts. Neither the stomatal conductance nor the kinetic responses to dark, light, or high CO2 were highly affected in tdt plants. In addition, we did not observe any impact on stomatal aperture following incubation with abscisic acid, malate, or citrate. Furthermore, an effect on photosynthetic capacity was not observed in the mutant lines. However, leaf mitochondrial metabolism was affected in the tdt plants. Levels of the intermediates of the tricarboxylic acid cycle were altered, and increases in both light and dark respiration were observed. We conclude that manipulation of the tonoplastic organic acid transporter impacted mitochondrial metabolism, while the overall stomatal and photosynthetic capacity were unaffected.
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Affiliation(s)
- David B Medeiros
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Kallyne A Barros
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Jessica Aline S Barros
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Rebeca P Omena-Garcia
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Stéphanie Arrivault
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Lílian M V P Sanglard
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Kelly C Detmann
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Willian Batista Silva
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Danilo M Daloso
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Fábio M DaMatta
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Adriano Nunes-Nesi
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Wagner L Araújo
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
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30
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Barros JAS, Cavalcanti JHF, Medeiros DB, Nunes-Nesi A, Avin-Wittenberg T, Fernie AR, Araújo WL. Autophagy Deficiency Compromises Alternative Pathways of Respiration following Energy Deprivation in Arabidopsis thaliana. Plant Physiol 2017; 175:62-76. [PMID: 28710132 PMCID: PMC5580740 DOI: 10.1104/pp.16.01576] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 07/11/2017] [Indexed: 05/18/2023]
Abstract
Under heterotrophic conditions, carbohydrate oxidation inside the mitochondrion is the primary energy source for cellular metabolism. However, during energy-limited conditions, alternative substrates are required to support respiration. Amino acid oxidation in plant cells plays a key role in this by generating electrons that can be transferred to the mitochondrial electron transport chain via the electron transfer flavoprotein/ubiquinone oxidoreductase system. Autophagy, a catabolic mechanism for macromolecule and protein recycling, allows the maintenance of amino acid pools and nutrient remobilization. Although the association between autophagy and alternative respiratory substrates has been suggested, the extent to which autophagy and primary metabolism interact to support plant respiration remains unclear. To investigate the metabolic importance of autophagy during development and under extended darkness, Arabidopsis (Arabidopsis thaliana) mutants with disruption of autophagy (atg mutants) were used. Under normal growth conditions, atg mutants showed lower growth and seed production with no impact on photosynthesis. Following extended darkness, atg mutants were characterized by signatures of early senescence, including decreased chlorophyll content and maximum photochemical efficiency of photosystem II coupled with increases in dark respiration. Transcript levels of genes involved in alternative pathways of respiration and amino acid catabolism were up-regulated in atg mutants. The metabolite profiles of dark-treated leaves revealed an extensive metabolic reprogramming in which increases in amino acid levels were partially compromised in atg mutants. Although an enhanced respiration in atg mutants was observed during extended darkness, autophagy deficiency compromises protein degradation and the generation of amino acids used as alternative substrates to the respiration.
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Affiliation(s)
- Jessica A S Barros
- Max Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - João Henrique F Cavalcanti
- Max Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - David B Medeiros
- Max Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Adriano Nunes-Nesi
- Max Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Tamar Avin-Wittenberg
- Max Planck Institute of Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany
- Department of Plant and Environmental Sciences, Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Givat Ram, Jerusalem 9190401, Israel
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany
| | - Wagner L Araújo
- Max Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
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31
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Cosme Silva GM, Silva WB, Medeiros DB, Salvador AR, Cordeiro MHM, da Silva NM, Santana DB, Mizobutsi GP. The chitosan affects severely the carbon metabolism in mango (Mangifera indica L. cv. Palmer) fruit during storage. Food Chem 2017; 237:372-378. [PMID: 28764009 DOI: 10.1016/j.foodchem.2017.05.123] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 05/23/2017] [Accepted: 05/23/2017] [Indexed: 11/18/2022]
Abstract
Mango is a highly perishable fruit with a short post-harvest time due to the intense metabolic activity after harvesting. In attempt to evaluate the effects of chitosan in mango fruits, it was treated with 0%, 1%, 2% or 3% of chitosan solutions, placed into plastic trays, and stored at room temperature. Changes in physical and chemical parameters were evaluated. Chitosan delayed the climacteric peak, water loss and firmness. Further, few changes in soluble solid content, titratable acidity, pH of the pulp as well as in sugar content and decreased starch degradation were observed. Altogether, our results suggest chitosan edible coating effectively prolongs the quality attributes, affecting basic mitochondrial respiration and starch degradation rate.
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Affiliation(s)
| | - Willian Batista Silva
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil.
| | - David B Medeiros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Acácio Rodrigues Salvador
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil
| | | | | | - Diederson Bortolini Santana
- Departamento de Fisiologia Vegetal, Universidade Estadual do Norte, Fluminense Darcy Ribeiro, 28035-200, Campos dos Goytacazes, RJ, Brazil
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32
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Pires MV, Pereira Júnior AA, Medeiros DB, Daloso DM, Pham PA, Barros KA, Engqvist MKM, Florian A, Krahnert I, Maurino VG, Araújo WL, Fernie AR. The influence of alternative pathways of respiration that utilize branched-chain amino acids following water shortage in Arabidopsis. Plant Cell Environ 2016; 39:1304-19. [PMID: 26616144 DOI: 10.1111/pce.12682] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 11/13/2015] [Accepted: 11/15/2015] [Indexed: 05/23/2023]
Abstract
During dark-induced senescence isovaleryl-CoA dehydrogenase (IVDH) and D-2-hydroxyglutarate dehydrogenase (D-2HGDH) act as alternate electron donors to the ubiquinol pool via the electron-transfer flavoprotein/electron-transfer flavoprotein:ubiquinone oxidoreductase (ETF/ETFQO) pathway. However, the role of this pathway in response to other stresses still remains unclear. Here, we demonstrated that this alternative pathway is associated with tolerance to drought in Arabidopsis. In comparison with wild type (WT) and lines overexpressing D-2GHDH, loss-of-function etfqo-1, d2hgdh-2 and ivdh-1 mutants displayed compromised respiration rates and were more sensitive to drought. Our results demonstrated that an operational ETF/ETFQO pathway is associated with plants' ability to withstand drought and to recover growth once water becomes replete. Drought-induced metabolic reprogramming resulted in an increase in tricarboxylic acid (TCA) cycle intermediates and total amino acid levels, as well as decreases in protein, starch and nitrate contents. The enhanced levels of the branched-chain amino acids in loss-of-function mutants appear to be related to their increased utilization as substrates for the TCA cycle under water stress. Our results thus show that mitochondrial metabolism is highly active during drought stress responses and provide support for a role of alternative respiratory pathways within this response.
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Affiliation(s)
- Marcel V Pires
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil
| | - Adilson A Pereira Júnior
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - David B Medeiros
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil
| | - Danilo M Daloso
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil
| | - Phuong Anh Pham
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Kallyne A Barros
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil
| | - Martin K M Engqvist
- Plant Molecular Physiology and Biotechnology, Institute of Plant Developmental and Molecular Biology, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, Universitätsstr 1, D-40225, Düsseldorf, Germany
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Göterborg, Sweden
| | - Alexandra Florian
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Ina Krahnert
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Veronica G Maurino
- Plant Molecular Physiology and Biotechnology, Institute of Plant Developmental and Molecular Biology, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, Universitätsstr 1, D-40225, Düsseldorf, Germany
| | - Wagner L Araújo
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
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33
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Medeiros DB, Martins SCV, Cavalcanti JHF, Daloso DM, Martinoia E, Nunes-Nesi A, DaMatta FM, Fernie AR, Araújo WL. Enhanced Photosynthesis and Growth in atquac1 Knockout Mutants Are Due to Altered Organic Acid Accumulation and an Increase in Both Stomatal and Mesophyll Conductance. Plant Physiol 2016; 170:86-101. [PMID: 26542441 PMCID: PMC4704574 DOI: 10.1104/pp.15.01053] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 11/05/2015] [Indexed: 05/05/2023]
Abstract
Stomata control the exchange of CO2 and water vapor in land plants. Thus, whereas a constant supply of CO2 is required to maintain adequate rates of photosynthesis, the accompanying water losses must be tightly regulated to prevent dehydration and undesired metabolic changes. Accordingly, the uptake or release of ions and metabolites from guard cells is necessary to achieve normal stomatal function. The AtQUAC1, an R-type anion channel responsible for the release of malate from guard cells, is essential for efficient stomatal closure. Here, we demonstrate that mutant plants lacking AtQUAC1 accumulated higher levels of malate and fumarate. These mutant plants not only display slower stomatal closure in response to increased CO2 concentration and dark but are also characterized by improved mesophyll conductance. These responses were accompanied by increases in both photosynthesis and respiration rates, without affecting the activity of photosynthetic and respiratory enzymes and the expression of other transporter genes in guard cells, which ultimately led to improved growth. Collectively, our results highlight that the transport of organic acids plays a key role in plant cell metabolism and demonstrate that AtQUAC1 reduce diffusive limitations to photosynthesis, which, at least partially, explain the observed increments in growth under well-watered conditions.
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Affiliation(s)
- David B Medeiros
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
| | - Samuel C V Martins
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
| | - João Henrique F Cavalcanti
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
| | - Danilo M Daloso
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
| | - Enrico Martinoia
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
| | - Fábio M DaMatta
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
| | - Alisdair R Fernie
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
| | - Wagner L Araújo
- Departamento de Biologia Vegetal (D.B.M., S.C.V.M, J.H.F.C., A.N.-N., F.M.D., W.L.A.) and Max-Planck Partner Group at the Departamento de Biologia Vegetal (D.B.M., J.H.F.C., A.N.-N., W.L.A.), Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil;Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (D.M.D., A.R.F.); andInstitute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland (E.M.)
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Medeiros DB, Daloso DM, Fernie AR, Nikoloski Z, Araújo WL. Utilizing systems biology to unravel stomatal function and the hierarchies underpinning its control. Plant Cell Environ 2015; 38:1457-70. [PMID: 25689387 DOI: 10.1111/pce.12517] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 01/20/2015] [Accepted: 01/27/2015] [Indexed: 05/08/2023]
Abstract
Stomata control the concomitant exchange of CO2 and transpiration in land plants. While a constant supply of CO2 is need to maintain the rate of photosynthesis, the accompanying water losses must be tightly regulated to prevent dehydration and undesired metabolic changes. The factors affecting stomatal movement are directly coupled with the cellular networks of guard cells. Although the guard cell has been used as a model for characterization of signaling pathways, several important questions about its functioning remain elusive. Current modeling approaches describe the stomatal conductance in terms of relatively few easy-to-measure variables being unsuitable for in silico design of genetic manipulation strategies. Here, we argue that a system biology approach, combining modeling and high-throughput experiments, may be used to elucidate the mechanisms underlying stomata control and to determine targets for modulation of stomatal responses to environment. In support of our opinion, we review studies demonstrating how high-throughput approaches have provided a systems-view of guard cells. Finally, we emphasize the opportunities and challenges of genome-scale modeling and large-scale data integration for in silico manipulation of guard cell functions to improve crop yields, particularly under stress conditions which are of pertinence both to climate change and water use efficiency.
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Affiliation(s)
- David B Medeiros
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Danilo M Daloso
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Alisdair R Fernie
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Zoran Nikoloski
- Systems Biology and Mathematical Modeling Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Wagner L Araújo
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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Araújo BF, Nora AB, Marconal MZ, Medeiros DB, Araújo ES, Fachinelloz FZ. [Anhidrotic ectodermal dysplasia syndrome in the neonatal period - case report]. J Pediatr (Rio J) 2001; 77:55-8. [PMID: 14647622 DOI: 10.2223/jped.113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVE: To describe a rare syndrome affecting children, and to urge pediatricians to consider this diagnosis when investigating idiopathic fever in neonates. METHODS: We report a case of anhidrotic ectodermal dysplasia syndrome in a 10 day old newborn in the neonatal intensive care unit at Hospital Geral de Caxias do Sul. The child presented recurrent episodes of fever since the first days of life. RESULTS: The patient presented dry mucus, dry skin, and fever. Skin biopsy was performed in the childacute;s back. Absence of sweat and sebaceous glands as well as hypoplasia of follicular structures were identified. The patient is receiving adequate treatment, and is being followed as an outpatient. CONCLUSION: Anhidrotic ectodermal dysplasia syndrome is a rare disorder that must be considered when investigating newborns with recurrent episodes of fever. During the neonatal period, the clinical manifestations of the disease are subtle and unspecific. Such findings become more visible after a few months of life. There is no definitive treatment for this syndrome.
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Affiliation(s)
- B F Araújo
- Universidade de Caxias do Sul (UCS), Caxias do Sul, RS, Brazil
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