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Rosa-Téllez S, Alcántara-Enguídanos A, Martínez-Seidel F, Casatejada-Anchel R, Saeheng S, Bailes CL, Erban A, Barbosa-Medeiros D, Alepúz P, Matus JT, Kopka J, Muñoz-Bertomeu J, Krueger S, Roje S, Fernie AR, Ros R. The serine-glycine-one-carbon metabolic network orchestrates changes in nitrogen and sulfur metabolism and shapes plant development. THE PLANT CELL 2024; 36:404-426. [PMID: 37804096 PMCID: PMC10827325 DOI: 10.1093/plcell/koad256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 10/08/2023]
Abstract
L-serine (Ser) and L-glycine (Gly) are critically important for the overall functioning of primary metabolism. We investigated the interaction of the phosphorylated pathway of Ser biosynthesis (PPSB) with the photorespiration-associated glycolate pathway of Ser biosynthesis (GPSB) using Arabidopsis thaliana PPSB-deficient lines, GPSB-deficient mutants, and crosses of PPSB with GPSB mutants. PPSB-deficient lines mainly showed retarded primary root growth. Mutation of the photorespiratory enzyme Ser-hydroxymethyltransferase 1 (SHMT1) in a PPSB-deficient background resumed primary root growth and induced a change in the plant metabolic pattern between roots and shoots. Grafting experiments demonstrated that metabolic changes in shoots were responsible for the changes in double mutant development. PPSB disruption led to a reduction in nitrogen (N) and sulfur (S) contents in shoots and a general transcriptional response to nutrient deficiency. Disruption of SHMT1 boosted the Gly flux out of the photorespiratory cycle, which increased the levels of the one-carbon (1C) metabolite 5,10-methylene-tetrahydrofolate and S-adenosylmethionine. Furthermore, disrupting SHMT1 reverted the transcriptional response to N and S deprivation and increased N and S contents in shoots of PPSB-deficient lines. Our work provides genetic evidence of the biological relevance of the Ser-Gly-1C metabolic network in N and S metabolism and in interorgan metabolic homeostasis.
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Affiliation(s)
- Sara Rosa-Téllez
- Institut de Biotecnologia i Biomedicina (BIOTECMED), Universitat de València, 46100 Burjassot, Spain
- Departament de Biologia Vegetal, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
| | - Andrea Alcántara-Enguídanos
- Institut de Biotecnologia i Biomedicina (BIOTECMED), Universitat de València, 46100 Burjassot, Spain
- Departament de Biologia Vegetal, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
| | | | - Ruben Casatejada-Anchel
- Institut de Biotecnologia i Biomedicina (BIOTECMED), Universitat de València, 46100 Burjassot, Spain
- Departament de Biologia Vegetal, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
| | - Sompop Saeheng
- Institute of Biological Chemistry, Washington State University, Pullman, WA 99164, USA
| | - Clayton L Bailes
- Institute of Biological Chemistry, Washington State University, Pullman, WA 99164, USA
| | - Alexander Erban
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | | | - Paula Alepúz
- Institut de Biotecnologia i Biomedicina (BIOTECMED), Universitat de València, 46100 Burjassot, Spain
- Departament de Bioquímica y Biologia Molecular, Facultat de Biologia, Universitat de València, 46100 Burjassot, Spain
| | - José Tomás Matus
- Institute for Integrative Systems Biology, I²SysBio, Universitat de València—CSIC, 46908 Paterna, Spain
| | - Joachim Kopka
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Jesús Muñoz-Bertomeu
- Departament de Biologia Vegetal, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
| | - Stephan Krueger
- Institute for Plant Sciences, University of Cologne, Zülpicherstraße 47b, 50674 Cologne, Germany
| | - Sanja Roje
- Institute of Biological Chemistry, Washington State University, Pullman, WA 99164, USA
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Roc Ros
- Institut de Biotecnologia i Biomedicina (BIOTECMED), Universitat de València, 46100 Burjassot, Spain
- Departament de Biologia Vegetal, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
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Roblin G, Octave S, Faucher M, Fleurat-Lessard P, Berjeaud JM. Cysteine: A multifaceted amino acid involved in signaling, plant resistance and antifungal development. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 129:77-89. [PMID: 29852365 DOI: 10.1016/j.plaphy.2018.05.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/04/2018] [Accepted: 05/22/2018] [Indexed: 06/08/2023]
Abstract
Early effects induced by cysteine were monitored using the model of Mimosa pudica pulvinar cells. Rapid dose-dependent membrane depolarization (within seconds) and modification of proton secretion (within minutes) were triggered at cysteine concentrations higher than 0.1 mM. These effects did not result from a modification of the plasma membrane H+-ATPase activity nor from a protonophore effect as shown by assays on plasma membrane vesicles isolated from pulvinar tissues. In a 0.5-10 mM range, cysteine inhibited the ion-driven turgor-mediated seismonastic reaction of Mimosa pudica primary pulvini and the dark-induced movement of Cassia fasciculata leaflets. At concentrations higher than 1 mM, it induced a long-lasting leaflet necrosis dependent on the concentration and treatment duration. Electron microscopy showed that cysteine induced important damage in the nucleus, mitochondria, endoplasmic reticulum and Golgi of the M. pudica motor cell. Cysteine inhibited in a concentration-dependent manner, from 0.5 to 20 mM, both the mycelial growth and the spore germination of the fungal pathogens Phaeomoniella chlamydospora and Phaeoacremonium minimum implicated in esca disease of grapevines. Using [35S] cysteine, we showed that the amino acid was absorbed following leaf spraying, translocated from leaves to other parts of grapevine cuttings and accumulated within trunks and roots. Therefore, cysteine showed relevant properties to be a candidate able to control fungal diseases either by acting as an early signal directing plant host reaction or/and by acting directly on fungal development.
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Affiliation(s)
- Gabriel Roblin
- Université de Poitiers, Ecologie & Biologie des Interactions, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 Poitiers cedex 9, France
| | - Stéphane Octave
- Université de Poitiers, Ecologie & Biologie des Interactions, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 Poitiers cedex 9, France; Current address: Sorbonne Universités, Université de Technologie de Compiègne, UMR CNRS 7025, Génie Enzymatique et Cellulaire, Rue du Docteur Schweitzer CS 60319, 60203 Compiègne Cedex, France
| | - Mireille Faucher
- Université de Poitiers, Ecologie & Biologie des Interactions, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 Poitiers cedex 9, France
| | - Pierrette Fleurat-Lessard
- Université de Poitiers, Ecologie & Biologie des Interactions, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 Poitiers cedex 9, France
| | - Jean-Marc Berjeaud
- Université de Poitiers, Ecologie & Biologie des Interactions, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 Poitiers cedex 9, France.
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3
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Schupp R, Rennenberg H. Changes in Sulfur Metabolism During Needle Development of Norway Spruce*. ACTA ACUST UNITED AC 2014. [DOI: 10.1111/j.1438-8677.1992.tb00285.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Herschbach C, De Kok LJ, Rennenberg H. Net Uptake of Sulfate and its Transport to the Shoot in Spinach Plants Fumigated with H2S or SO2: Does Atmospheric Sulfur Affect the “Inter-Organ” Regulation of Sulfur Nutrition?*. ACTA ACUST UNITED AC 2014. [DOI: 10.1111/j.1438-8677.1995.tb00829.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tan Q, Zhang L, Grant J, Cooper P, Tegeder M. Increased phloem transport of S-methylmethionine positively affects sulfur and nitrogen metabolism and seed development in pea plants. PLANT PHYSIOLOGY 2010; 154:1886-96. [PMID: 20923886 PMCID: PMC2996030 DOI: 10.1104/pp.110.166389] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Accepted: 10/01/2010] [Indexed: 05/18/2023]
Abstract
Seeds of grain legumes are important energy and food sources for humans and animals. However, the yield and quality of legume seeds are limited by the amount of sulfur (S) partitioned to the seeds. The amino acid S-methylmethionine (SMM), a methionine derivative, has been proposed to be an important long-distance transport form of reduced S, and we analyzed whether SMM phloem loading and source-sink translocation are important for the metabolism and growth of pea (Pisum sativum) plants. Transgenic plants were produced in which the expression of a yeast SMM transporter, S-Methylmethionine Permease1 (MMP1, YLL061W), was targeted to the phloem and seeds. Phloem exudate analysis showed that concentrations of SMM are elevated in MMP1 plants, suggesting increased phloem loading. Furthermore, expression studies of genes involved in S transport and metabolism in source organs, as well as xylem sap analyses, support that S uptake and assimilation are positively affected in MMP1 roots. Concomitantly, nitrogen (N) assimilation in root and leaf and xylem amino acid profiles were changed, resulting in increased phloem loading of amino acids. When investigating the effects of increased S and N phloem transport on seed metabolism, we found that protein levels were improved in MMP1 seeds. In addition, changes in SMM phloem loading affected plant growth and seed number, leading to an overall increase in seed S, N, and protein content in MMP1 plants. Together, these results suggest that phloem loading and source-sink partitioning of SMM are important for plant S and N metabolism and transport as well as seed set.
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Affiliation(s)
| | | | | | | | - Mechthild Tegeder
- School of Biological Sciences, Center for Reproductive Biology, Washington State University, Pullman, Washington 99164 (Q.T., L.Z., M.T.); New Zealand Institute of Plant and Food Research, Christchurch 8140, New Zealand (J.G., P.C.)
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6
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Herschbach C, Scheerer U, Rennenberg H. Redox states of glutathione and ascorbate in root tips of poplar (Populus tremula X P. alba) depend on phloem transport from the shoot to the roots. JOURNAL OF EXPERIMENTAL BOTANY 2010; 61:1065-74. [PMID: 20022923 PMCID: PMC2826650 DOI: 10.1093/jxb/erp371] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Glutathione (GSH) and ascorbate (ASC) are important antioxidants that are involved in stress defence and cell proliferation of meristematic root cells. In principle, synthesis of ASC and GSH in the roots as well as ASC and GSH transport from the shoot to the roots by phloem mass flow is possible. However, it is not yet known whether the ASC and/or the GSH level in roots depends on the supply from the shoot. This was analysed by feeding mature leaves with [(14)C]ASC or [(35)S]GSH and subsequent detection of the radiolabel in different root fractions. Quantitative dependency of root ASC and GSH on shoot-derived ASC and GSH was investigated with poplar (Populus tremula X P. alba) trees interrupted in phloem transport. [(35)S]GSH is transported from mature leaves to the root tips, but is withdrawn from the phloem along the entire transport path. When phloem transport was interrupted, the GSH content in root tips halved within 3 d. [(14)C]ASC is also transported from mature leaves to the root tips but, in contrast to GSH, ASC is not removed from the phloem along the transport path. Accordingly, ASC accumulates in root tips. Interruption of phloem transport disturbed the level and the ASC redox state within the entire root system. Diminished total ASC levels were attributed mainly to a decline of dehydroascorbate (DHA). As the redox state of ASC is of particular significance for root growth and development, it is concluded that phloem transport of ASC may constitute a shoot to root signal to coordinate growth and development at the whole plant level.
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Affiliation(s)
- Cornelia Herschbach
- Albert-Ludwigs-University Freiburg, Institute of Forest Botany and Tree Physiology, Chair of Tree Physiology, Georges-Köhler-Allee 053/054, D-79110 Freiburg, Germany.
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Collins C, Cunningham N. Modelling the fate of sulphur-35 in crops. 1. Calibration data. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2005; 133:431-437. [PMID: 15519718 DOI: 10.1016/j.envpol.2004.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2004] [Accepted: 07/02/2004] [Indexed: 05/24/2023]
Abstract
Gas-cooled nuclear power plants in the UK release sulphur-35 during their routine operation. The gas is in the form of COS which can be readily assimilated by vegetation. It is therefore necessary to be able to model the uptake of such releases in order to quantify any potential contamination of the food chain. To develop such models experimental data are required. A series of experiments was undertaken to determine the rate of deposition, the partition and subsequent loss of sulphur-35 in crops exposed to CO(35)S. The mass normalised deposition rate was similar for the range of crops tested, while the partition of the (35)S paralleled the growth of crop components. There was no significant loss of radioactivity other than that expected from radioactive decay.
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Affiliation(s)
- Chris Collins
- Department of Environmental Science and Technology, Imperial College of Science Technology and Medicine, Prince Consort Road, London SW7 2BP, UK.
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Affiliation(s)
- Melinda Neal Martin
- Rutgers University, Center for Biotechnology and the Environment, New Brunswick, NJ 08901-8520, USA
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Foyer CH, Theodoulou FL, Delrot S. The functions of inter- and intracellular glutathione transport systems in plants. TRENDS IN PLANT SCIENCE 2001; 6:486-92. [PMID: 11590068 DOI: 10.1016/s1360-1385(01)02086-6] [Citation(s) in RCA: 141] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Glutathione is one of the major redox buffers in most aerobic cells, and it has a broad spectrum of functions in plants. Recent discoveries implicate this thiol peptide in signalling and cellular homeostasis. Glutathione can sense intracellular redox status: perturbations of glutathione reduction state are transduced into changes in gene expression. This central role demands precise control of both the concentration and the reduction state of glutathione in different compartments. In addition to the regulation of glutathione biosynthesis and redox state, attention is now turning to the role of glutathione transporters.
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10
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Significance of Phloem-Translocated Organic Sulfur Compounds for the Regulation of Sulfur Nutrition. ACTA ACUST UNITED AC 2001. [DOI: 10.1007/978-3-642-56849-7_9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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11
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Stewart A, Brudenell A, Collins CD. Deposition of gaseous radionuclides to fruit. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2001; 52:175-189. [PMID: 11202696 DOI: 10.1016/s0265-931x(00)00032-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
14C, 35S and 3H are released to the environment during the operation of gas-cooled reactors and were identified as radionuclides of interest by the BIOMASS Fruits Working Group. This paper provides a review of the deposition, uptake, allocation and loss of these radionuclides with respect to fruit and conceptual models for gaseous radionuclides. It is concluded that the mechanisms for the uptake of CO35S, HTO and 14CO2 are well understood and that their deposition velocities have been quantified. There is also a reasonable body of work on the translocation of 14C once in the crop, but much less for 35S and 3H, which are considered to follow source-sink relationships. The loss rates of the three radionuclides show large differences, with tritium lost rapidly in the form of HTO but retained longer when converted to OBT. The losses of 14C are less and those of sulphur are minimal post fixation. When fruit crops alone are considered, the quantity of information is further reduced but predictions on possible behaviour of these radionuclide species can be made from the current knowledge.
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Affiliation(s)
- A Stewart
- T.H. Huxley School of the Environment, Earth Resources and Engineering, Imperial College at Silwood Park, Ascot, Berkshire SL5 7TE, UK
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12
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Koricheva J, Roy S, Vranjic JA, Haukioja E, Hughes PR, Hänninen O. Antioxidant responses to simulated acid rain and heavy metal deposition in birch seedlings. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 1997; 95:249-258. [PMID: 15093466 DOI: 10.1016/s0269-7491(96)00071-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/1996] [Accepted: 05/31/1996] [Indexed: 05/24/2023]
Abstract
This study measured the responses of different anti-oxidants in 2-year-old birch (Betula pendula Roth) seedlings subjected to simulated acid rain (pH 4.0) and heavy metals (Cu/Ni), applied alone or in combination for 2 months. The applied concentrations of pollutants did not significantly affect seedling biomass or total glutathione levels. Acid rain alone increased superoxide dismutase (SOD) activity both in leaves and roots, while heavy metals alone inhibited SOD activity in roots. Both acid rain and heavy metals applied singly increased ascorbate peroxidase (APX) and guaiacol peroxidase (GPX) activities in leaves but decreased activities in roots. In contrast, acid rain and heavy metal treatments increased glutathione reductase (GR) activity in roots but not in leaves. Spraying birch seedlings with a mixture of acid rain and heavy metals increased SOD, APX and GPX activities in leaves and GR activity in roots. However, the effects of mixed pollutants on enzyme activities usually were less than the summed effects of individual pollutants. Enzyme responses also depended on where pollutants were applied: spraying pollutants onto the shoots initiated higher responses in SOD, APX and GPX than did application to the soil surface, while the opposite was true for GR.
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Affiliation(s)
- J Koricheva
- Laboratory of Ecological Zoology, Department of Biology, University of Turku, FIN-20014 Turku, Finland
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13
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Sheu BH. Effects of sulfur dioxide on growth, photosynthesis and enzyme activities of Chinese Guger-Tree seedlings. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 1994; 86:349-354. [PMID: 15091627 DOI: 10.1016/0269-7491(94)90176-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/1993] [Accepted: 12/01/1993] [Indexed: 05/24/2023]
Abstract
The Chinese Guger-Tree (Schima superba Gard et Champ var. superba) is an important harwood species in Taiwan where the ambient SO(2) concentration in some areas is high. Seedlings were raised in field chambers with and without SO(2) to determine whether this species is affected by this pollutant. After 4 weeks of exposure to 325 ppb of SO(2), the photosynthetic rate of seedlings decreased immediately. During the fumigation period, stem height growth was not inhibited, however, the stem diameter growth was reduced significantly. The dry weight of leaves was unchanged, while stem, root and total seedling weight were lower than those of control plants. Sulfhydryl groups in leaves increased by 75%, whereas they did not change in roots following SO(2) uptake. Superoxide dismutase in leaves did not change, however, peroxidase activity increased significantly. Results suggest that ambient SO(2) in some areas in Taiwan may affect the physiology and growth of the Chinese Guger-Tree.
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Affiliation(s)
- B H Sheu
- Department of Forestry, National Chung-Hsing University, Taichung, 402, Taiwan
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Klagges S, Bhatti AS, Sarwar G, Hilpert A, Jeschke WD. Ion distribution in relation to leaf age in Leptochloa fusca (L.) Kunth* (Kallar grass) II. Anions* †. THE NEW PHYTOLOGIST 1993; 125:521-528. [PMID: 33874595 DOI: 10.1111/j.1469-8137.1993.tb03900.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Using Leptochloa fusca (L.) Kunth (Kallar grass) plants, the distribution of Cl- , NO3 - , H3 PO4 - , SO4 2- and malate between leaves of various ages has been studied. Plants grown in a reclaimed, salt-affected field, in solution culture and in soil at 10, 100 and 125 mM NaCl have been analyzed. Apparently due to excretion by salt secreting glands on L. fusca leaves and to phloem export, Cl- concentrations did not increase strongly with leaf age. On a leaf f. wt basis, chloride secretion was constant over the series of increasingly aged mature leaves. If it was related to the chloride increments in the leaves, chloride secretion increased strongly from younger to mature leaves and reached between ISO and 200% of the concurrent Cl- deposition in the lamina. Changes in the tissue concentrations of nitrate and phosphate with leafage showed a maximum in recently matured leaves. Decreases in older leaves were attributed to nitrate reduction and export of reduced nitrogen and to retranslocation of phosphate. In leaves of field-grown L. fusca nitrate was non-detectable. Sulphate and malate concentrations in laminae continued to increase from the youngest to the oldest leaves. The increasing negative charge resulting from these increases in divalent anions can be accounted for by the loss of charge occurring in connection with reduction of nitrate and export of phosphate. Higher external salinity led, apart from increases in tissue Cl- , to noticeable decreases in tissue nitrate and phosphate but not in sulphate and malate concentrations, the latter being even increased at higher external NaCl. The observed changes in anion concentrations are compared with and discussed in relation to changes found in Ricinus communis and in Atriplex hortensis.
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Affiliation(s)
- Sabine Klagges
- Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl für Botanik 1, Universität Würzburg, Germany
| | - A Saeed Bhatti
- Nuclear Institute for Agriculture and Biology, Faisalabad, Pakistan
| | - G Sarwar
- Nuclear Institute for Agriculture and Biology, Faisalabad, Pakistan
| | - Andrea Hilpert
- Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl für Botanik 1, Universität Würzburg, Germany
| | - W Dieter Jeschke
- Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl für Botanik 1, Universität Würzburg, Germany
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15
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Changes in metal-binding peptides due to acclimation to cadmium transferred between ramets of Salvinia minima. Oecologia 1991; 88:109-115. [DOI: 10.1007/bf00328410] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/1990] [Accepted: 05/17/1991] [Indexed: 11/25/2022]
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16
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Brunold C, Suter M. Localization of enzymes of assimilatory sulfate reduction in pea roots. PLANTA 1989; 179:228-234. [PMID: 24201522 DOI: 10.1007/bf00393693] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/1989] [Accepted: 04/26/1989] [Indexed: 06/02/2023]
Abstract
The localization of enzymes of assimilatory sulfate reduction was examined in roots of 5-d-old pea (Pisum sativum L.) seedlings. During an 8-h period, roots of intact plants incorporated more label from (35)SO 4 (2-) in the nutrient solution into the amino-acid and protein fractions than shoots. Excised roots and roots of intact plants assimilated comparable amounts of radioactivity from (35)SO 4 (2-) into the amino-acid and protein fractions during a 1-h period, demonstrating that roots of pea seedlings at this stage of development were not completely dependent on the shoots for reduced sulfur compounds. Indeed, these roots contained activities of ATP-sulfurylase (EC 2.7.7.4), adenosine 5'-phosphosulfate sulfotransferase, sulfite reductase (EC 1.8.7.1) and O-acetyl-L-serine sulfhydrylase (EC 4.2.99.8) at levels of 50, 30, 120 and 100%, respectively, of that in shoots. Most of the extractable activity of adenosine 5'-phosphosulfate sulfotransferase was detected in the first centimeter of the root tip. Using sucrose density gradients for organelle separation from this part of the root showed that almost 40% of the activity of ATP-sulfurylase, adenosine 5'-phosphosulfate sulfotransferase and sulfite reductase banded with the marker enzyme for proplastids, whereas only approximately 7% of O-acetyl-L-serine sulfhydrylase activity was detected in these fractions. Because their distributions on the gradients were very similar to that of nitrite reductase, a proplastid enzyme, it is concluded that ATP-sulfurylase, adenosine 5'-phosphosulfate sulfotransferase and sulfite reductase are also exclusively or almost exclusively localized in the proplastids of pea roots. O-Acetyl-L-serine sulfhydrylase is predominantly present in the cytoplasm.
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Affiliation(s)
- C Brunold
- Pflanzenphysiologisches Institut der Universität Bern, Altenbergrain 21, CH-3013, Bern, Switzerland
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17
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DE Kok LJ, Stahl K, Rennenberg H. Fluxes of atmospheric hydrogen sulphide to plant shoots. THE NEW PHYTOLOGIST 1989; 112:533-542. [PMID: 29265436 DOI: 10.1111/j.1469-8137.1989.tb00348.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Short-term exposure of maize, pumpkin, spinach and spruce to various atmospheric H2 S concentrations resulted in high H2 S fluxes to the shoots. In all species an almost linear relation was observed between flux and H2 S concentration up to around 0.3 μl -1 . At higher H2 S concentrations the flux reached a maximum, which was about 0.08, 0.04, 0.1 and 0.03 μmol g f. wt-1 h-1 for maize, pumpkin, spinach and spruce, respectively. The transpiration rate was not affected during H2 S exposure. Up to a level of 0.3 μl 1-1 , the shoot conductance for a influx of the various species varied between 61 and 92% of that predicted from shoot conductance for aqueous vapour efflux. There was no relation between the H2 S flux to the shoots and the sensitivity of the species towards H2 S. A 12 days' exposure of maize, pumpkin and spinach to 0.75 μl 1-1 H2 S resulted in a reduction of shoot yield of 1.36 and 69%, respectively. H2 S flux to the shoots of pumpkin, spinach and spruce remained rather constant during exposure for three or four days to about 0.22μl l-l H2 S. Even at a concentration of about 0.8 μl 1-1 H2 , which reduced the growth of pumpkin and spinach, the fluxes remained nearly constant. Fluxes of H2 S to the shoots did, however, vary diurnally, being high during the light and low during the dark period. The H2 S flux to transpiration ratio was constant during both light and dark periods, indicating that uptake was predominantly via the stomata. Only part of the total flux of H2 S to the shoots of pumpkin and spinach could be recovered in the water-soluble non-protein sulphydryl fraction of the shoots (maximum 34%). It is proposed that cysteine synthase is directly involved in the fixation and metabolism of atmospheric H2 S by the plant.
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Affiliation(s)
- Luit J DE Kok
- Fraunhofer Institute for Atmospheric Environmental Research (IFU), Kreuzeckbahnstrasse 19, 8100 Garmisch-Partenkirchen, Federal Republic of Germany
| | - Klaus Stahl
- Fraunhofer Institute for Atmospheric Environmental Research (IFU), Kreuzeckbahnstrasse 19, 8100 Garmisch-Partenkirchen, Federal Republic of Germany
| | - Heinz Rennenberg
- Fraunhofer Institute for Atmospheric Environmental Research (IFU), Kreuzeckbahnstrasse 19, 8100 Garmisch-Partenkirchen, Federal Republic of Germany
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Rennenberg H, Polle A, Martini N, Thoene B. Interaction of sulfate and glutathione transport in cultured tobacco cells. PLANTA 1988; 176:68-74. [PMID: 24220736 DOI: 10.1007/bf00392481] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/1988] [Accepted: 04/11/1988] [Indexed: 06/02/2023]
Abstract
Photoheterotrophic and heterotrophic suspension cultures of tobacco (Nicotiana tabacum L.) were grown with 1 mM glutathione (reduced; GSH) as sole source of sulfur. Addition of sulfate to both cultures did not alter the rate of exponential growth, but affected the removal of GSH and sulfate in different ways. In photoheterotrophic suspensions, addition of sulfate caused a decline in the net uptake of GSH, whereas sulfate was taken up by the green cells immediately. In heterotrophic suspensions, however, addition of sulfate did not affect the net uptake of GSH and sulfate was only taken up by the cells after the GSH supply in the medium had been exhausted. Apparently, GSH uptake in photoheterotrophic cells is inhibited by sulfate, whereas sulfate uptake is inhibited by GSH in heterotrophic cells. The differences in the effect of GSH on sulfate uptake in photoheterotrophic and heterotrophic tobacco suspensions cannot be attributed to differences in the kinetic properties of sulfate carriers. In short-time transport experiments, both cultures took up sulfate almost entirely by an active-transport system as shown by experiments with metabolic inhibitors; sulfate transport of both cultures obeyed monophasic Michaelis-Menten kinetics with similar app. Km (photoheterotrophic cells: 16.0±2.0 μM; heterotrophic cells: 11.8±1.8 μM) and Vmax (photoheterotrophic cells: 323±50 nmol·min(-1)·g(-1) dry weight; heterotrophic cells: 233±3 nmol·min(-1)·g(-1) dry weight). Temperature- and pH-dependence of sulfate transport showed almost identical patterns. However, the cultures exhibited remarkable differences in the inhibition of sulfur influx by GSH in short-time transport experiments. Whereas 1 mM GSH inhibited sulfate transport into heterotrophic tobacco cells completely, sulfate transport into photoheterotrophic cells proceeded at more than two-thirds of its maximum velocity at this GSH concentration. The mode of action of GSH on sulfate transport in chloroplast-free tobacco cell does not appear to be direct: a 14-h exposure to 1 mM GSH was found to be necessary to completely block sulfate transport; a 4-h time of exposure did not affect this process. Consequently, glutathione does not seem to be a product of sulfur metabolism acting on sulfate-carrier entities by negative feedback control. When transferred to the whole plant, the observed differences in sulfate and glutathione influx into green and chloroplast-free cells may be interpreted as a regulatory device to prevent the uptake of excess sulfate by plants.
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Affiliation(s)
- H Rennenberg
- Botanisches Institut der Universität zu Köln, Gyrhofstrasse 15, D-5000, Köln 41, Federal Republic of Germany
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Bielawski W, Joy KW. Reduced and oxidised glutathione and glutathione-reductase activity in tissues of Pisum sativum. PLANTA 1986; 169:267-72. [PMID: 24232560 DOI: 10.1007/bf00392324] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/1986] [Accepted: 06/16/1986] [Indexed: 05/10/2023]
Abstract
In three-week-old pea plants (Pisum sativum L., cv. Little Marvel) grown in the light, total glutathione levels were highest in apex and expanding leaves (1.5 μmol·(g FW)(-1)), and lower (0.4-0.6 μmol·(g FW)(-1)) in older leaves and roots. In the light period, levels in expanded leaves increased by about 40%, compared with dark values, with lesser increases in roots and apex. In illuminated plants the proportion in the reduced form was 86-88% in leaves and 80% in roots, and these values fell during the dark period (to 82% and 69%, respectively). Reduced glutathione makes up 65-70% of the low-molecular-weight thiol in leaves, but over 95% in roots. Chloroplasts contained about 10% of the leaf glutathione, at a concentration of 1-2 mM; total glutathione in the chloroplasts, and the proportion of oxidised form (GSSG) increased in light, while NADP(+)/NADPH ratios decreased, indicating both synthesis and active oxidation of glutathione in light. Chloroplasts contained 52% (young leaf) to 75% (mature leaf) of the GSSG-reductase (EC 1.6.4.2) activity in the leaves. In roots, over 30% of the GSSG reductase was in the plastid fraction. Very little GSSG-reductase activity was associated with mitochondria in leaf or root.
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Affiliation(s)
- W Bielawski
- Biology Department, Carleton University, K1S 5B6, Ottawa, Ont., Canada
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Macnicol P, Bergmann L. A role for homoglutathione in organic sulphur transport to the developing mung bean seed. ACTA ACUST UNITED AC 1984. [DOI: 10.1016/0304-4211(84)90172-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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