1
|
Al-Obaidi JR, Jamaludin AA, Rahman NA, Ahmad-Kamil EI. How plants respond to heavy metal contamination: a narrative review of proteomic studies and phytoremediation applications. Planta 2024; 259:103. [PMID: 38551683 DOI: 10.1007/s00425-024-04378-2] [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: 09/09/2023] [Accepted: 03/07/2024] [Indexed: 04/02/2024]
Abstract
MAIN CONCLUSION Heavy metal pollution caused by human activities is a serious threat to the environment and human health. Plants have evolved sophisticated defence systems to deal with heavy metal stress, with proteins and enzymes serving as critical intercepting agents for heavy metal toxicity reduction. Proteomics continues to be effective in identifying markers associated with stress response and metabolic processes. This review explores the complex interactions between heavy metal pollution and plant physiology, with an emphasis on proteomic and biotechnological perspectives. Over the last century, accelerated industrialization, agriculture activities, energy production, and urbanization have established a constant need for natural resources, resulting in environmental degradation. The widespread buildup of heavy metals in ecosystems as a result of human activity is especially concerning. Although some heavy metals are required by organisms in trace amounts, high concentrations pose serious risks to the ecosystem and human health. As immobile organisms, plants are directly exposed to heavy metal contamination, prompting the development of robust defence mechanisms. Proteomics has been used to understand how plants react to heavy metal stress. The development of proteomic techniques offers promising opportunities to improve plant tolerance to toxicity from heavy metals. Additionally, there is substantial scope for phytoremediation, a sustainable method that uses plants to extract, sequester, or eliminate contaminants in the context of changes in protein expression and total protein behaviour. Changes in proteins and enzymatic activities have been highlighted to illuminate the complex effects of heavy metal pollution on plant metabolism, and how proteomic research has revealed the plant's ability to mitigate heavy metal toxicity by intercepting vital nutrients, organic substances, and/or microorganisms.
Collapse
Affiliation(s)
- Jameel R Al-Obaidi
- Department of Biology, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900, Tanjong Malim, Perak, Malaysia.
- Applied Science Research Center, Applied Science Private University, Amman, Jordan.
| | - Azi Azeyanty Jamaludin
- Department of Biology, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900, Tanjong Malim, Perak, Malaysia
- Center of Biodiversity and Conservation, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900, Tanjong Malim, Perak, Malaysia
| | - Norafizah Abdul Rahman
- Gene Marker Laboratory, Faculty of Agriculture and Life Sciences (AGLS), Science South Building, Lincoln University, Lincoln, 7608, Canterbury, New Zealand
| | - E I Ahmad-Kamil
- Malaysian Nature Society (MNS), JKR 641, Jalan Kelantan, Bukit Persekutuan, 50480, Kuala Lumpur, Malaysia.
| |
Collapse
|
2
|
Corti F, Festa M, Stein F, Stevanato P, Siroka J, Navazio L, Vothknecht UC, Alboresi A, Novák O, Formentin E, Szabò I. Comparative analysis of wild-type and chloroplast MCU-deficient plants reveals multiple consequences of chloroplast calcium handling under drought stress. Front Plant Sci 2023; 14:1228060. [PMID: 37692417 PMCID: PMC10485843 DOI: 10.3389/fpls.2023.1228060] [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] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 07/28/2023] [Indexed: 09/12/2023]
Abstract
Introduction Chloroplast calcium homeostasis plays an important role in modulating the response of plants to abiotic and biotic stresses. One of the greatest challenges is to understand how chloroplast calcium-permeable pathways and sensors are regulated in a concerted manner to translate specific information into a calcium signature and to elucidate the downstream effects of specific chloroplast calcium dynamics. One of the six homologs of the mitochondrial calcium uniporter (MCU) was found to be located in chloroplasts in the leaves and to crucially contribute to drought- and oxidative stress-triggered uptake of calcium into this organelle. Methods In the present study we integrated comparative proteomic analysis with biochemical, genetic, cellular, ionomic and hormone analysis in order to gain an insight into how chloroplast calcium channels are integrated into signaling circuits under watered condition and under drought stress. Results Altogether, our results indicate for the first time a link between chloroplast calcium channels and hormone levels, showing an enhanced ABA level in the cmcu mutant already in well-watered condition. Furthermore, we show that the lack of cMCU results in an upregulation of the calcium sensor CAS and of enzymes of chlorophyll synthesis, which are also involved in retrograde signaling upon drought stress, in two independent KO lines generated in Col-0 and Col-4 ecotypes. Conclusions These observations point to chloroplasts as important signaling hubs linked to their calcium dynamics. Our results obtained in the model plant Arabidopsis thaliana are discussed also in light of our limited knowledge regarding organellar calcium signaling in crops and raise the possibility of an involvement of such signaling in response to drought stress also in crops.
Collapse
Affiliation(s)
| | | | - Frank Stein
- European Molecular Biology Laboratory, Heidelberg, Germany
| | - Piergiorgio Stevanato
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padua, Padua, Italy
| | - Jitka Siroka
- Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences & Palacký University, Olomouc, Czechia
| | | | - Ute C. Vothknecht
- Plant Cell Biology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, Germany
| | | | - Ondřej Novák
- Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences & Palacký University, Olomouc, Czechia
| | | | - Ildikò Szabò
- Department of Biology, University of Padua, Padua, Italy
| |
Collapse
|
3
|
Farthing EC, Henbest KC, Garcia‐Becerra T, Peaston KA, Williams LE. Dissecting the relative contribution of ECA3 and group 8/9 cation diffusion facilitators to manganese homeostasis in Arabidopsis thaliana. Plant Direct 2023; 7:e495. [PMID: 37228331 PMCID: PMC10202827 DOI: 10.1002/pld3.495] [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] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 03/14/2023] [Accepted: 03/27/2023] [Indexed: 05/27/2023]
Abstract
Manganese (Mn) is an essential micronutrient for plant growth but becomes toxic when present in excess. A number of Arabidopsis proteins are involved in Mn transport including ECA3, MTPs, and NRAMPs; however, their relative contributions to Mn homeostasis remain to be demonstrated. A major focus here was to clarify the importance of ECA3 in responding to Mn deficiency and toxicity using a range of mutants. We show that ECA3 localizes to the trans-Golgi and plays a major role in response to Mn deficiency with severe effects seen in eca3 nramp1 nramp2 under low Mn supply. ECA3 plays a minor role in Mn-toxicity tolerance, but only when the cis-Golgi-localized MTP11 is non-functional. We also use mutants and overexpressors to determine the relative contributions of MTP members to Mn homeostasis. The trans-Golgi-localized MTP10 plays a role in Mn-toxicity tolerance, but this is only revealed in mutants when MTP8 and MTP11 are non-functional and when overexpressed in mtp11 mutants. MTP8 and MTP10 confer greater Mn-toxicity resistance to the pmr1 yeast mutant than MTP11, and an important role for the first aspartate in the fifth transmembrane domain DxxxD motif is demonstrated. Overall, new insight into the relative influence of key transporters in Mn homeostasis is provided.
Collapse
Affiliation(s)
- Emily C. Farthing
- School of Biological SciencesUniversity of SouthamptonSouthamptonHampshireUK
| | - Kate C. Henbest
- School of Biological SciencesUniversity of SouthamptonSouthamptonHampshireUK
| | | | - Kerry A. Peaston
- School of Biological SciencesUniversity of SouthamptonSouthamptonHampshireUK
| | | |
Collapse
|
4
|
Tao Y, Liu C, Piao L, Yang F, Liu J, Jan MF, Li M. Effect of Mn Deficiency on Carbon and Nitrogen Metabolism of Different Genotypes Seedlings in Maize ( Zea mays L.). Plants (Basel) 2023; 12:1407. [PMID: 36987095 PMCID: PMC10051073 DOI: 10.3390/plants12061407] [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] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/19/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
Manganese deficiency critically impairs the function and stability of photosystem II (PSII) and negatively impacts crop growth and yield. However, the response mechanisms of carbon and nitrogen metabolism to Mn deficiency in different genotypes of maize and the differences in Mn deficiency tolerance are unclear. Herein, three different genotypes of maize seedlings (sensitive genotype: Mo17, tolerant genotype: B73, and B73 × Mo17) were exposed to Mn deficiency treatment for 16 days using liquid culture with different concentrations of MnSO4 [0.00, 2.23, 11.65, and 22.30 mg/L (control)]. We found that complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity. This resulted in reduced leaf and root nitrogen uptake, with Mo17 being most severely inhibited. B73 and B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities and lower neutral convertase activity compared to Mo17, which resulted in higher accumulation of soluble sugars and sucrose and maintenance of the osmoregulation capacity of leaves, which helped mitigate damage caused by Mn deficiency. The findings revealed the physiological regulation mechanism of carbon and nitrogen metabolism in different genotypes of maize seedlings that resist Mn deficiency stress, providing a theoretical basis for developing high yield and quality.
Collapse
Affiliation(s)
- Yuzhao Tao
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China; (Y.T.)
| | - Changzhuang Liu
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China; (Y.T.)
| | - Lin Piao
- Maize Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Fuqiang Yang
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China; (Y.T.)
| | - Jiaqi Liu
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China; (Y.T.)
| | - Muhammad Faheem Jan
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China; (Y.T.)
| | - Ming Li
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China; (Y.T.)
| |
Collapse
|
5
|
Park J, Cleary MB, Li D, Mattocks JA, Xu J, Wang H, Mukhopadhyay S, Gale EM, Cotruvo JA. A genetically encoded fluorescent sensor for manganese(II), engineered from lanmodulin. Proc Natl Acad Sci U S A 2022; 119:e2212723119. [PMID: 36508659 PMCID: PMC9907080 DOI: 10.1073/pnas.2212723119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/10/2022] [Indexed: 12/15/2022] Open
Abstract
The design of selective metal-binding sites is a challenge in both small-molecule and macromolecular chemistry. Selective recognition of manganese (II)-the first-row transition metal ion that tends to bind with the lowest affinity to ligands, as described by the Irving-Williams series-is particularly difficult. As a result, there is a dearth of chemical biology tools with which to study manganese physiology in live cells, which would advance understanding of photosynthesis, host-pathogen interactions, and neurobiology. Here we report the rational re-engineering of the lanthanide-binding protein, lanmodulin, into genetically encoded fluorescent sensors for MnII, MnLaMP1 and MnLaMP2. These sensors with effective Kd(MnII) of 29 and 7 µM, respectively, defy the Irving-Williams series to selectively detect MnII in vitro and in vivo. We apply both sensors to visualize kinetics of bacterial labile manganese pools. Biophysical studies indicate the importance of coordinated solvent and hydrophobic interactions in the sensors' selectivity. Our results establish lanmodulin as a versatile scaffold for design of selective protein-based biosensors and chelators for metals beyond the f-block.
Collapse
Affiliation(s)
- Jennifer Park
- Department of Chemistry, The Pennsylvania State University, University Park, PA16802
| | - Michael B. Cleary
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital / Harvard Medical School, Charlestown, MA02129
| | - Danyang Li
- Division of Pharmacology and Toxicology, College of Pharmacy, Institute for Cellular and Molecular Biology, and Institute for Neuroscience, The University of Texas at Austin, Austin, TX78712
| | - Joseph A. Mattocks
- Department of Chemistry, The Pennsylvania State University, University Park, PA16802
| | - Jiansong Xu
- Department of Chemistry, The Pennsylvania State University, University Park, PA16802
| | - Huan Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital / Harvard Medical School, Charlestown, MA02129
| | - Somshuvra Mukhopadhyay
- Division of Pharmacology and Toxicology, College of Pharmacy, Institute for Cellular and Molecular Biology, and Institute for Neuroscience, The University of Texas at Austin, Austin, TX78712
| | - Eric M. Gale
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital / Harvard Medical School, Charlestown, MA02129
| | - Joseph A. Cotruvo
- Department of Chemistry, The Pennsylvania State University, University Park, PA16802
| |
Collapse
|
6
|
He J, Yang B, Hause G, Rössner N, Peiter-Volk T, Schattat MH, Voiniciuc C, Peiter E. The trans-Golgi-localized protein BICAT3 regulates manganese allocation and matrix polysaccharide biosynthesis. Plant Physiol 2022; 190:2579-2600. [PMID: 35993897 PMCID: PMC9706472 DOI: 10.1093/plphys/kiac387] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 07/18/2022] [Indexed: 05/11/2023]
Abstract
Manganese (Mn2+) is essential for a diversity of processes, including photosynthetic water splitting and the transfer of glycosyl moieties. Various Golgi-localized glycosyltransferases that mediate cell wall matrix polysaccharide biosynthesis are Mn2+ dependent, but the supply of these enzymes with Mn2+ is not well understood. Here, we show that the BIVALENT CATION TRANSPORTER 3 (BICAT3) localizes specifically to trans-cisternae of the Golgi. In agreement with a role in Mn2+ and Ca2+ homeostasis, BICAT3 rescued yeast (Saccharomyces cerevisiae) mutants defective in their translocation. Arabidopsis (Arabidopsis thaliana) knockout mutants of BICAT3 were sensitive to low Mn2+ and high Ca2+ availability and showed altered accumulation of these cations. Despite reduced cell expansion and leaf size in Mn2+-deficient bicat3 mutants, their photosynthesis was improved, accompanied by an increased Mn content of chloroplasts. Growth defects of bicat3 corresponded with an impaired glycosidic composition of matrix polysaccharides synthesized in the trans-Golgi. In addition to the vegetative growth defects, pollen tube growth of bicat3 was heterogeneously aberrant. This was associated with a severely reduced and similarly heterogeneous pectin deposition and caused diminished seed set and silique length. Double mutant analyses demonstrated that the physiological relevance of BICAT3 is distinct from that of ER-TYPE CA2+-ATPASE 3, a Golgi-localized Mn2+/Ca2+-ATPase. Collectively, BICAT3 is a principal Mn2+ transporter in the trans-Golgi whose activity is critical for specific glycosylation reactions in this organelle and for the allocation of Mn2+ between Golgi apparatus and chloroplasts.
Collapse
Affiliation(s)
- Jie He
- Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Faculty of Natural Sciences III, Martin Luther University Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Bo Yang
- Independent Junior Research Group—Designer Glycans, Leibniz Institute of Plant Biochemistry, Halle (Saale), 06120, Germany
| | - Gerd Hause
- Biocentre, Martin Luther University Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Nico Rössner
- Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Faculty of Natural Sciences III, Martin Luther University Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Tina Peiter-Volk
- Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Faculty of Natural Sciences III, Martin Luther University Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Martin H Schattat
- Plant Physiology, Institute of Biology, Faculty of Natural Sciences I, Martin Luther University Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Cătălin Voiniciuc
- Independent Junior Research Group—Designer Glycans, Leibniz Institute of Plant Biochemistry, Halle (Saale), 06120, Germany
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611, USA
| | | |
Collapse
|
7
|
Guo J, Long L, Chen A, Dong X, Liu Z, Chen L, Wang J, Yuan L. Tonoplast-localized transporter ZmNRAMP2 confers root-to-shoot translocation of manganese in maize. Plant Physiol 2022; 190:2601-2616. [PMID: 36111860 PMCID: PMC9706481 DOI: 10.1093/plphys/kiac434] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 07/11/2022] [Accepted: 08/23/2022] [Indexed: 05/16/2023]
Abstract
Almost all living organisms require manganese (Mn) as an essential trace element for survival. To maintain an irreplaceable role in the oxygen-evolving complex of photosynthesis, plants require efficient Mn uptake in roots and delivery to above-ground tissues. However, the underlying mechanisms of root-to-shoot Mn translocation remain unclear. Here, we identified an Natural Resistance Associated Macrophage Protein (NRAMP) family member in maize (Zea mays), ZmNRAMP2, which localized to the tonoplast in maize protoplasts and mediated transport of Mn in yeast (Saccharomyces cerevisiae). Under Mn deficiency, two maize mutants defective in ZmNRAMP2 exhibited remarkable reduction of root-to-shoot Mn translocation along with lower shoot Mn contents, resulting in substantial decreases in Fv/Fm and plant growth inhibition compared to their corresponding wild-type (WT) plants. ZmNRAMP2 transcripts were highly expressed in xylem parenchyma cells of the root stele. Compared to the WT, the zmnramp2-1 mutant displayed lower Mn concentration in xylem sap accompanied with retention of Mn in root stele. Furthermore, the overexpression of ZmNRAMP2 in transgenic maize showed enhanced root-to-shoot translocation of Mn and improved tolerance to Mn deficiency. Taken together, our study reveals a crucial role of ZmNRAMP2 in root-to-shoot translocation of Mn via accelerating vacuolar Mn release in xylem parenchyma cells for adaption of maize plants to low Mn stress and provides a promising transgenic approach to develop low Mn-tolerant crop cultivars.
Collapse
Affiliation(s)
- Jingxuan Guo
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China
| | - Lizhi Long
- Tea Research Institute of Chinese Academy of Agricultural Sciences and Key Laboratory of Tea Biology and Resources Utilization, MOA, Hangzhou 310008, China
| | - Anle Chen
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Xiaonan Dong
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China
| | - Zhipeng Liu
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China
| | - Limei Chen
- Center for Crop Functional Genomics and Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Junying Wang
- Biotechnology Research Institute of Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Lixing Yuan
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China
- Center for Crop Functional Genomics and Molecular Breeding, China Agricultural University, Beijing 100193, China
| |
Collapse
|
8
|
Chao WS, Li X, Horvath DP, Anderson JV. Genetic loci associated with freezing tolerance in a European rapeseed ( Brassica napus L.) diversity panel identified by genome-wide association mapping. Plant Direct 2022; 6:e405. [PMID: 35647480 PMCID: PMC9132609 DOI: 10.1002/pld3.405] [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: 09/17/2021] [Accepted: 04/07/2022] [Indexed: 06/15/2023]
Abstract
Winter biotypes of rapeseed (Brassica napus L.) require a vernalization treatment to enter the reproductive phase and generally produce greater yields than spring rapeseed. To find genetic loci associated with freezing tolerance in rapeseed, we first performed genotyping-by-sequencing (GBS) on a diversity panel consisting of 222 rapeseed accessions originating primarily from Europe, which identified 69,554 high-quality single-nucleotide polymorphisms (SNPs). Model-based cluster analysis suggested that there were eight subgroups. The diversity panel was then phenotyped for freezing survival (visual damage and Fv/Fo and Fv/Fm) after 2 months of cold acclimation (5°C) and a freezing treatment (-15°C for 4 h). The genotypic and phenotypic data for each accession in the rapeseed diversity panel was then used to conduct a genome-wide association study (GWAS). GWAS results showed that 14 significant markers were mapped to seven chromosomes for the phenotypes scored. Twenty-four candidate genes located within the mapped loci were identified as previously associated with lipid, photosynthesis, flowering, ubiquitination, and cytochrome P450 in rapeseed or other plant species.
Collapse
Affiliation(s)
- Wun S. Chao
- Edward T. Schafer Agricultural Research Center, Sunflower and Plant Biology Research UnitUSDA‐Agricultural Research ServiceFargoNorth DakotaUSA
| | - Xuehui Li
- Department of Plant SciencesNorth Dakota State UniversityFargoNorth DakotaUSA
| | - David P. Horvath
- Edward T. Schafer Agricultural Research Center, Sunflower and Plant Biology Research UnitUSDA‐Agricultural Research ServiceFargoNorth DakotaUSA
| | - James V. Anderson
- Edward T. Schafer Agricultural Research Center, Sunflower and Plant Biology Research UnitUSDA‐Agricultural Research ServiceFargoNorth DakotaUSA
| |
Collapse
|
9
|
Assunção AGL, Cakmak I, Clemens S, González-Guerrero M, Nawrocki A, Thomine S. Micronutrient homeostasis in plants for more sustainable agriculture and healthier human nutrition. J Exp Bot 2022; 73:1789-1799. [PMID: 35134869 PMCID: PMC8921004 DOI: 10.1093/jxb/erac014] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [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: 07/30/2021] [Accepted: 01/28/2022] [Indexed: 05/03/2023]
Abstract
The provision of sustainable, sufficient, and nutritious food to the growing population is a major challenge for agriculture and the plant research community. In this respect, the mineral micronutrient content of food crops deserves particular attention. Micronutrient deficiencies in cultivated soils and plants are a global problem that adversely affects crop production and plant nutritional value, as well as human health and well-being. In this review, we call for awareness of the importance and relevance of micronutrients in crop production and quality. We stress the need for better micronutrient nutrition in human populations, not only in developing but also in developed nations, and describe strategies to identify and characterize new varieties with high micronutrient content. Furthermore, we explain how adequate nutrition of plants with micronutrients impacts metabolic functions and the capacity of plants to express tolerance mechanisms against abiotic and biotic constraints. Finally, we provide a brief overview and a critical discussion on current knowledge, future challenges, and specific technological needs for research on plant micronutrient homeostasis. Research in this area is expected to foster the sustainable development of nutritious and healthy food crops for human consumption.
Collapse
Affiliation(s)
- Ana G L Assunção
- Department of Plant and Environmental Sciences, University of Copenhagen, 1871 Frederiksberg, Denmark
- CIBIO-InBIO, Research Centre in Biodiversity and Genetic Resources, University of Porto, 4485-661 Vairão, Portugal
| | - Ismail Cakmak
- Faculty of Engineering and Natural Sciences, Sabanci University, 34956 Istanbul, Turkey
| | - Stephan Clemens
- Department of Plant Physiology and Faculty of Life Sciences: Food, Nutrition and Health, University of Bayreuth, 95440 Bayreuth, Germany
| | - Manuel González-Guerrero
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA), Universidad Politécnica de Madrid, 28223 Pozuelo de Alarcón (Madrid), Spain
| | | | | |
Collapse
|
10
|
Trinh MDL, Masuda S. Chloroplast pH Homeostasis for the Regulation of Photosynthesis. Front Plant Sci 2022; 13:919896. [PMID: 35693183 PMCID: PMC9174948 DOI: 10.3389/fpls.2022.919896] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 05/04/2022] [Indexed: 05/16/2023]
Abstract
The pH of various chloroplast compartments, such as the thylakoid lumen and stroma, is light-dependent. Light illumination induces electron transfer in the photosynthetic apparatus, coupled with proton translocation across the thylakoid membranes, resulting in acidification and alkalization of the thylakoid lumen and stroma, respectively. Luminal acidification is crucial for inducing regulatory mechanisms that protect photosystems against photodamage caused by the overproduction of reactive oxygen species (ROS). Stromal alkalization activates enzymes involved in the Calvin-Benson-Bassham (CBB) cycle. Moreover, proton translocation across the thylakoid membranes generates a proton gradient (ΔpH) and an electric potential (ΔΨ), both of which comprise the proton motive force (pmf) that drives ATP synthase. Then, the synthesized ATP is consumed in the CBB cycle and other chloroplast metabolic pathways. In the dark, the pH of both the chloroplast stroma and thylakoid lumen becomes neutral. Despite extensive studies of the above-mentioned processes, the molecular mechanisms of how chloroplast pH can be maintained at proper levels during the light phase for efficient activation of photosynthesis and other metabolic pathways and return to neutral levels during the dark phase remain largely unclear, especially in terms of the precise control of stromal pH. The transient increase and decrease in chloroplast pH upon dark-to-light and light-to-dark transitions have been considered as signals for controlling other biological processes in plant cells. Forward and reverse genetic screening approaches recently identified new plastid proteins involved in controlling ΔpH and ΔΨ across the thylakoid membranes and chloroplast proton/ion homeostasis. These proteins have been conserved during the evolution of oxygenic phototrophs and include putative photosynthetic protein complexes, proton transporters, and/or their regulators. Herein, we summarize the recently identified protein players that control chloroplast pH and influence photosynthetic efficiency in plants.
Collapse
Affiliation(s)
- Mai Duy Luu Trinh
- Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Shinji Masuda
- Department of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan
- *Correspondence: Shinji Masuda,
| |
Collapse
|
11
|
He J, Rössner N, Hoang MTT, Alejandro S, Peiter E. Transport, functions, and interaction of calcium and manganese in plant organellar compartments. Plant Physiol 2021; 187:1940-1972. [PMID: 35235665 PMCID: PMC8890496 DOI: 10.1093/plphys/kiab122] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 03/02/2021] [Indexed: 05/05/2023]
Abstract
Calcium (Ca2+) and manganese (Mn2+) are essential elements for plants and have similar ionic radii and binding coordination. They are assigned specific functions within organelles, but share many transport mechanisms to cross organellar membranes. Despite their points of interaction, those elements are usually investigated and reviewed separately. This review takes them out of this isolation. It highlights our current mechanistic understanding and points to open questions of their functions, their transport, and their interplay in the endoplasmic reticulum (ER), vesicular compartments (Golgi apparatus, trans-Golgi network, pre-vacuolar compartment), vacuoles, chloroplasts, mitochondria, and peroxisomes. Complex processes demanding these cations, such as Mn2+-dependent glycosylation or systemic Ca2+ signaling, are covered in some detail if they have not been reviewed recently or if recent findings add to current models. The function of Ca2+ as signaling agent released from organelles into the cytosol and within the organelles themselves is a recurrent theme of this review, again keeping the interference by Mn2+ in mind. The involvement of organellar channels [e.g. glutamate receptor-likes (GLR), cyclic nucleotide-gated channels (CNGC), mitochondrial conductivity units (MCU), and two-pore channel1 (TPC1)], transporters (e.g. natural resistance-associated macrophage proteins (NRAMP), Ca2+ exchangers (CAX), metal tolerance proteins (MTP), and bivalent cation transporters (BICAT)], and pumps [autoinhibited Ca2+-ATPases (ACA) and ER Ca2+-ATPases (ECA)] in the import and export of organellar Ca2+ and Mn2+ is scrutinized, whereby current controversial issues are pointed out. Mechanisms in animals and yeast are taken into account where they may provide a blueprint for processes in plants, in particular, with respect to tunable molecular mechanisms of Ca2+ versus Mn2+ selectivity.
Collapse
Affiliation(s)
- Jie He
- Faculty of Natural Sciences III, Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Nico Rössner
- Faculty of Natural Sciences III, Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Minh T T Hoang
- Faculty of Natural Sciences III, Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Santiago Alejandro
- Faculty of Natural Sciences III, Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Edgar Peiter
- Faculty of Natural Sciences III, Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
- Author for communication:
| |
Collapse
|
12
|
Chovancek E, Zivcak M, Brestic M, Hussain S, Allakhverdiev SI. The different patterns of post-heat stress responses in wheat genotypes: the role of the transthylakoid proton gradient in efficient recovery of leaf photosynthetic capacity. Photosynth Res 2021; 150:179-193. [PMID: 33393064 DOI: 10.1007/s11120-020-00812-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 07/06/2020] [Accepted: 12/08/2020] [Indexed: 05/28/2023]
Abstract
The frequency and severity of heat waves are expected to increase in the near future, with a significant impact on physiological functions and yield of crop plants. In this study, we assessed the residual post-heat stress effects on photosynthetic responses of six diverse winter wheat (Triticum sp.) genotypes, differing in country of origin, taxonomy and ploidy (tetraploids vs. hexaploids). After 5 days of elevated temperatures (up to 38 °C), the photosynthetic parameters recorded on the first day of recovery (R1) as well as after the next 4-5 days of the recovery (R2) were compared to those of the control plants (C) grown under moderate temperatures. Based on the values of CO2 assimilation rate (A) and the maximum rates of carboxylation (VCmax) in R1, we identified that the hexaploid (HEX) and tetraploid (TET) species clearly differed in the strength of their response to heat stress. Next, the analyses of gas exchange, simultaneous measurements of PSI and PSII photochemistry and the measurements of electrochromic bandshift (ECS) have consistently shown that photosynthetic and photoprotective functions in leaves of TET genotypes were almost fully recovered in R2, whereas the recovery of photosynthetic and photoprotective functions in the HEX group in R2 was still rather low. A poor recovery was associated with an overly reduced acceptor side of photosystem I as well as high values of the electric membrane potential (Δψ component of the proton motive force, pmf) in the chloroplast. On the other hand, a good recovery of photosynthetic capacity and photoprotective functions was clearly associated with an enhanced ΔpH component of the pmf, thus demonstrating a key role of efficient regulation of proton transport to ensure buildup of the transthylakoid proton gradient needed for photosynthesis restoration after high-temperature episodes.
Collapse
Affiliation(s)
- Erik Chovancek
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovak Republic
| | - Marek Zivcak
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovak Republic.
| | - Marian Brestic
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovak Republic
| | - Sajad Hussain
- College of Agronomy, Sichuan Agricultural University, Chengdu, People's Republic of China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Agricultural University, Chengdu, People's Republic of China
| | | |
Collapse
|
13
|
Pivato M, Ballottari M. Chlamydomonas reinhardtii cellular compartments and their contribution to intracellular calcium signalling. J Exp Bot 2021; 72:5312-5335. [PMID: 34077536 PMCID: PMC8318260 DOI: 10.1093/jxb/erab212] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 12/16/2020] [Accepted: 05/11/2021] [Indexed: 05/12/2023]
Abstract
Calcium (Ca2+)-dependent signalling plays a well-characterized role in the response to different environmental stimuli, in both plant and animal cells. In the model organism for green algae, Chlamydomonas reinhardtii, Ca2+ signals were reported to have a crucial role in different physiological processes, such as stress responses, photosynthesis, and flagella functions. Recent reports identified the underlying components of the Ca2+ signalling machinery at the level of specific subcellular compartments and reported in vivo imaging of cytosolic Ca2+ concentration in response to environmental stimuli. The characterization of these Ca2+-related mechanisms and proteins in C. reinhardtii is providing knowledge on how microalgae can perceive and respond to environmental stimuli, but also on how this Ca2+ signalling machinery has evolved. Here, we review current knowledge on the cellular mechanisms underlying the generation, shaping, and decoding of Ca2+ signals in C. reinhardtii, providing an overview of the known and possible molecular players involved in the Ca2+ signalling of its different subcellular compartments. The advanced toolkits recently developed to measure time-resolved Ca2+ signalling in living C. reinhardtii cells are also discussed, suggesting how they can improve the study of the role of Ca2+ signals in the cellular response of microalgae to environmental stimuli.
Collapse
Affiliation(s)
- Matteo Pivato
- Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy
| | - Matteo Ballottari
- Department of Biotechnology, University of Verona, Strada le Grazie 15, 37134 Verona, Italy
- Correspondence:
| |
Collapse
|
14
|
Zhang B, Zhang C, Liu C, Fu A, Luan S. A Golgi-localized manganese transporter functions in pollen tube tip growth to control male fertility in Arabidopsis. Plant Commun 2021; 2:100178. [PMID: 34027392 PMCID: PMC8132125 DOI: 10.1016/j.xplc.2021.100178] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 02/23/2021] [Accepted: 03/12/2021] [Indexed: 05/12/2023]
Abstract
Manganese (Mn) serves as an essential cofactor for many enzymes in various compartments of a plant cell. Allocation of Mn among various organelles thus plays a central role in Mn homeostasis to support metabolic processes. We report the identification of a Golgi-localized Mn transporter (named PML3) that is essential for rapid cell elongation in young tissues such as emerging leaves and the pollen tube. In particular, the pollen tube defect in the pml3 loss-of-function mutant caused severe reduction in seed yield, a critical agronomic trait. Further analysis suggested that a loss of pectin deposition in the pollen tube might cause the pollen tube to burst and slow its elongation, leading to decreased male fertility. As the Golgi apparatus serves as the major hub for biosynthesis and modification of cell-wall components, PML3 may function in Mn homeostasis of this organelle, thereby controlling metabolic and/or trafficking processes required for pectin deposition in rapidly elongating cells.
Collapse
Affiliation(s)
- Bin Zhang
- Chinese Education Ministry's Key Laboratory of Western Resources and Modern Biotechnology, Key Laboratory of Biotechnology Shaanxi Province, College of Life Sciences, Northwest University, Xi'an 710069, China
- State Key Laboratory for Pharmaceutical Biotechnology, Nanjing University-Nanjing Forestry University Joint Institute for Plant Molecular Biology, College of Life Sciences, Nanjing University, Nanjing 210093, China
| | - Chi Zhang
- Chinese Education Ministry's Key Laboratory of Western Resources and Modern Biotechnology, Key Laboratory of Biotechnology Shaanxi Province, College of Life Sciences, Northwest University, Xi'an 710069, China
| | - Congge Liu
- State Key Laboratory for Pharmaceutical Biotechnology, Nanjing University-Nanjing Forestry University Joint Institute for Plant Molecular Biology, College of Life Sciences, Nanjing University, Nanjing 210093, China
| | - Aigen Fu
- Chinese Education Ministry's Key Laboratory of Western Resources and Modern Biotechnology, Key Laboratory of Biotechnology Shaanxi Province, College of Life Sciences, Northwest University, Xi'an 710069, China
- Corresponding author
| | - Sheng Luan
- Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA
- Corresponding author
| |
Collapse
|
15
|
Hu SH, Lin SF, Huang YC, Huang CH, Kuo WY, Jinn TL. Significance of AtMTM1 and AtMTM2 for Mitochondrial MnSOD Activation in Arabidopsis. Front Plant Sci 2021; 12:690064. [PMID: 34434202 PMCID: PMC8382117 DOI: 10.3389/fpls.2021.690064] [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: 04/02/2021] [Accepted: 07/13/2021] [Indexed: 05/14/2023]
Abstract
The manganese (Mn) tracking factor for mitochondrial Mn superoxide dismutase (MnSOD) has been annotated as yMTM1 in yeast, which belongs to the mitochondrial carrier family. We confirmed that Arabidopsis AtMTM1 and AtMTM2 are functional homologs of yMTM1 as they can revive yeast MnSOD activity in yMTM1-mutant cells. Transient expression of AtMnSOD-3xFLAG in the AtMTM1 and AtMTM2-double mutant protoplasts confirmed that AtMTM1 and AtMTM2 are required for AtMnSOD activation. Our study revealed that AtMnSOD interacts with AtMTM1 and AtMTM2 in the mitochondria. The expression levels of AtMTM1, AtMTM2, and AtMnSOD respond positively to methyl viologen (MV) and metal stress. AtMTM1 and AtMTM2 are involved in Mn and Fe homeostasis, root length, and flowering time. Transient expression of chloroplast-destined AtMnSOD revealed that an evolutionarily conserved activation mechanism, like the chloroplastic-localized MnSOD in some algae, still exists in Arabidopsis chloroplasts. This study strengthens the proposition that AtMTM1 and AtMTM2 participate in the AtMnSOD activation and ion homeostasis.
Collapse
Affiliation(s)
- Shu-Hsuan Hu
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, Taiwan
| | - Shu-Fan Lin
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, Taiwan
| | - Ya-Chen Huang
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, Taiwan
| | - Chien-Hsun Huang
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, Taiwan
- Institute of Plant Biology, Center of Evolutionary Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Wen-Yu Kuo
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, Taiwan
| | - Tsung-Luo Jinn
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, Taiwan
- *Correspondence: Tsung-Luo Jinn,
| |
Collapse
|
16
|
Hoecker N, Hennecke Y, Schrott S, Marino G, Schmidt SB, Leister D, Schneider A. Gene Replacement in Arabidopsis Reveals Manganese Transport as an Ancient Feature of Human, Plant and Cyanobacterial UPF0016 Proteins. Front Plant Sci 2021; 12:697848. [PMID: 34194462 PMCID: PMC8236900 DOI: 10.3389/fpls.2021.697848] [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] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 05/20/2021] [Indexed: 05/08/2023]
Abstract
The protein family 0016 (UPF0016) is conserved through evolution, and the few members characterized share a function in Mn2+ transport. So far, little is known about the history of these proteins in Eukaryotes. In Arabidopsis thaliana five such proteins, comprising four different subcellular localizations including chloroplasts, have been described, whereas non-photosynthetic Eukaryotes have only one. We used a phylogenetic approach to classify the eukaryotic proteins into two subgroups and performed gene-replacement studies to investigate UPF0016 genes of various origins. Replaceability can be scored readily in the Arabidopsis UPF0016 transporter mutant pam71, which exhibits a functional deficiency in photosystem II. The N-terminal region of the Arabidopsis PAM71 was used to direct selected proteins to chloroplast membranes. Transgenic pam71 lines overexpressing the closest plant homolog (CMT1), human TMEM165 or cyanobacterial MNX successfully restored photosystem II efficiency, manganese binding to photosystem II complexes and consequently plant growth rate and biomass production. Thus AtCMT1, HsTMEM165, and SynMNX can operate in the thylakoid membrane and substitute for PAM71 in a non-native environment, indicating that the manganese transport function of UPF0016 proteins is an ancient feature of the family. We propose that the two chloroplast-localized UPF0016 proteins, CMT1 and PAM71, in plants originated from the cyanobacterial endosymbiont that gave rise to the organelle.
Collapse
Affiliation(s)
- Natalie Hoecker
- Molekularbiologie der Pflanzen (Botanik), Fakultät für Biologie, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Yvonne Hennecke
- Molekularbiologie der Pflanzen (Botanik), Fakultät für Biologie, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Simon Schrott
- Molekularbiologie der Pflanzen (Botanik), Fakultät für Biologie, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Giada Marino
- Molekularbiologie der Pflanzen (Botanik), Fakultät für Biologie, Ludwig-Maximilians-Universität München, Martinsried, Germany
- Massenspektrometrie von Biomolekülen an der LMU (MSBioLMU), Fakultät für Biologie, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Sidsel Birkelund Schmidt
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Dario Leister
- Molekularbiologie der Pflanzen (Botanik), Fakultät für Biologie, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Anja Schneider
- Molekularbiologie der Pflanzen (Botanik), Fakultät für Biologie, Ludwig-Maximilians-Universität München, Martinsried, Germany
- *Correspondence: Anja Schneider,
| |
Collapse
|
17
|
Liu Z, An L, Lin S, Wu T, Li X, Tu J, Yang F, Zhu H, Yang L, Cheng Y, Qin Z. Comparative physiological and transcriptomic analysis of pear leaves under distinct training systems. Sci Rep 2020; 10:18892. [PMID: 33144674 DOI: 10.1038/s41598-020-75794-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 10/19/2020] [Indexed: 12/21/2022] Open
Abstract
Canopy architecture is critical in determining the light interception and distribution, and subsequently the photosynthetic efficiency and productivity. However, the physiological responses and molecular mechanisms by which pear canopy architectural traits impact on photosynthesis remain poorly understood. Here, physiological investigations coupled with comparative transcriptomic analyses were performed in pear leaves under distinct training systems. Compared with traditional freestanding system, flat-type trellis system (DP) showed higher net photosynthetic rate (PN) levels at the most time points throughout the entire monitored period, especially for the interior of the canopy in sunny side. Gene ontology analysis revealed that photosynthesis, carbohydrate derivative catabolic process and fatty acid metabolic process were over-represented in leaves of DP system with open-canopy characteristics. Weighted gene co-expression network analysis uncovered a significant network module positive correlated with PN value. The hub genes (PpFKF1 and PpPRR5) of the module were enriched in circadian rhythm pathway, suggesting a functional role for circadian clock genes in mediating photosynthetic performance under distinct training systems. These results draw a link between pear photosynthetic response and specific canopy architectural traits, and highlight light harvesting and circadian clock network as potential targets for the input signals from the fluctuating light availability under distinct training systems.
Collapse
|
18
|
Lebredonchel E, Houdou M, Hoffmann HH, Kondratska K, Krzewinski MA, Vicogne D, Rice CM, Klein A, Foulquier F. Investigating the functional link between TMEM165 and SPCA1. Biochem J 2019; 476:3281-93. [PMID: 31652305 DOI: 10.1042/BCJ20190488] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 10/07/2019] [Accepted: 10/17/2019] [Indexed: 01/09/2023]
Abstract
TMEM165 was highlighted in 2012 as the first member of the Uncharacterized Protein Family 0016 (UPF0016) related to human glycosylation diseases. Defects in TMEM165 are associated with strong Golgi glycosylation abnormalities. Our previous work has shown that TMEM165 rapidly degrades with supraphysiological manganese supplementation. In this paper, we establish a functional link between TMEM165 and SPCA1, the Golgi Ca2+/Mn2+ P-type ATPase pump. A nearly complete loss of TMEM165 was observed in SPCA1-deficient Hap1 cells. We demonstrate that TMEM165 was constitutively degraded in lysosomes in the absence of SPCA1. Complementation studies showed that TMEM165 abundance was directly dependent on SPCA1's function and more specifically its capacity to pump Mn2+ from the cytosol into the Golgi lumen. Among SPCA1 mutants that differentially impair Mn2+ and Ca2+ transport, only the Q747A mutant that favors Mn2+ pumping rescues the abundance and Golgi subcellular localization of TMEM165. Interestingly, the overexpression of SERCA2b also rescues the expression of TMEM165. Finally, this paper highlights that TMEM165 expression is linked to the function of SPCA1.
Collapse
|
19
|
Li J, Yokosho K, Liu S, Cao HR, Yamaji N, Zhu XG, Liao H, Ma JF, Chen ZC. Diel magnesium fluctuations in chloroplasts contribute to photosynthesis in rice. Nat Plants 2020; 6:848-859. [PMID: 32541951 DOI: 10.1038/s41477-020-0686-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 05/04/2020] [Indexed: 05/24/2023]
Abstract
Photosynthesis provides food, fibre and fuel that support our society; understanding the mechanisms controlling dynamic changes in this process helps identify new options to improve photosynthesis. Photosynthesis shows diel changes, which have been largely attributed to external light/dark conditions, as well as internal gene expression and the post-translational modification of critical enzymes. Here we report diel fluctuations of magnesium (Mg) in rice (Oryza sativa) chloroplasts, which may function as a rhythm regulator contributing to the post-translational regulation of photosynthetic CO2 assimilation in rice. We found that a chloroplast-localized Mg2+ transporter gene, OsMGT3, which is rhythmically expressed in leaf mesophyll cells, partly modulates Mg fluctuations in rice chloroplasts. Knockout of OsMGT3 substantially reduced Mg2+ uptake, as well as the amplitude of free Mg2+ fluctuations in chloroplasts, which was closely associated with a decrease in ribulose 1,5-bisphosphate carboxylase activity in vivo and a consequent decline in the photosynthetic rate. In addition, the mesophyll-specific overexpression of OsMGT3 remarkably improved photosynthetic efficiency and growth performance in rice. Taken together, these observations demonstrate that OsMGT3-dependent diel Mg fluctuations in chloroplasts may contribute to Mg-dependent enzyme activities for photosynthesis over the daily cycle. Enhancing Mg2+ input to chloroplasts could be a potential approach to improving photosynthetic efficiency in plants.
Collapse
Affiliation(s)
- Jian Li
- Root Biology Center, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Kengo Yokosho
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan
| | - Sheng Liu
- Root Biology Center, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Hong Rui Cao
- Root Biology Center, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Naoki Yamaji
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan
| | - Xin Guang Zhu
- National Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence for Molecular Plant Sciences and Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Hong Liao
- Root Biology Center, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jian Feng Ma
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan.
| | - Zhi Chang Chen
- Root Biology Center, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China.
| |
Collapse
|
20
|
Tsujii M, Tanudjaja E, Uozumi N. Diverse Physiological Functions of Cation Proton Antiporters across Bacteria and Plant Cells. Int J Mol Sci 2020; 21:E4566. [PMID: 32604959 DOI: 10.3390/ijms21124566] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/22/2020] [Accepted: 06/24/2020] [Indexed: 12/17/2022] Open
Abstract
Membrane intrinsic transport systems play an important role in maintaining ion and pH homeostasis and forming the proton motive force in the cytoplasm and cell organelles. In most organisms, cation/proton antiporters (CPAs) mediate the exchange of K+, Na+ and Ca2+ for H+ across the membrane in response to a variety of environmental stimuli. The tertiary structure of the ion selective filter and the regulatory domains of Escherichia coli CPAs have been determined and a molecular mechanism of cation exchange has been proposed. Due to symbiogenesis, CPAs localized in mitochondria and chloroplasts of eukaryotic cells resemble prokaryotic CPAs. CPAs primarily contribute to keeping cytoplasmic Na+ concentrations low and controlling pH, which promotes the detoxification of electrophiles and formation of proton motive force across the membrane. CPAs in cyanobacteria and chloroplasts are regulators of photosynthesis and are essential for adaptation to high light or osmotic stress. CPAs in organellar membranes and in the plasma membrane also participate in various intracellular signal transduction pathways. This review discusses recent advances in our understanding of the role of CPAs in cyanobacteria and plant cells.
Collapse
|
21
|
Thines L, Stribny J, Morsomme P. From the Uncharacterized Protein Family 0016 to the GDT1 family: Molecular insights into a newly-characterized family of cation secondary transporters. Microb Cell 2020; 7:202-214. [PMID: 32743000 PMCID: PMC7380456 DOI: 10.15698/mic2020.08.725] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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] [Indexed: 12/16/2022]
Abstract
The Uncharacterized Protein Family 0016 (UPF0016) gathers poorly studied membrane proteins well conserved through evolution that possess one or two copies of the consensus motif Glu-x-Gly-Asp-(Arg/Lys)-(Ser/Thr). Members are found in many eukaryotes, bacteria and archaea. The interest for this protein family arose in 2012 when its human member TMEM165 was linked to the occurrence of Congenital Disorders of Glycosylation (CDGs) when harbouring specific mutations. Study of the UPF0016 family is undergone through the characterization of the bacterium Vibrio cholerae (MneA), cyanobacterium Synechocystis (SynPAM71), yeast Saccharomyces cerevisiae (Gdt1p), plant Arabidopsis thaliana (PAM71 and CMT1), and human (TMEM165) members. These proteins have all been identified as transporters of cations, more precisely of Mn2+, with an extra reported function in Ca2+ and/or H+ transport for some of them. Apart from glycosylation in humans, the UPF0016 members are required for lactation in humans, photosynthesis in plants and cyanobacteria, Ca2+ signaling in yeast, and Mn2+ homeostasis in the five aforementioned species. The requirement of the UPF0016 members for key physiological processes most likely derives from their transport activity at the Golgi membrane in human and yeast, the chloroplasts membranes in plants, the thylakoid and plasma membranes in cyanobacteria, and the cell membrane in bacteria. In the light of these studies on various UPF0016 members, this family is not considered as uncharacterized anymore and has been renamed the Gdt1 family according to the name of its S. cerevisiae member. This review aims at assembling and confronting the current knowledge in order to identify shared and distinct features in terms of transported molecules, mode of action, structure, etc., as well as to better understand their corresponding physiological roles.
Collapse
Affiliation(s)
- Louise Thines
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Louvain-la-Neuve, Belgium
| | - Jiri Stribny
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Louvain-la-Neuve, Belgium
| | - Pierre Morsomme
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Louvain-la-Neuve, Belgium
| |
Collapse
|
22
|
Alejandro S, Höller S, Meier B, Peiter E. Manganese in Plants: From Acquisition to Subcellular Allocation. Front Plant Sci 2020; 11:300. [PMID: 32273877 PMCID: PMC7113377 DOI: 10.3389/fpls.2020.00300] [Citation(s) in RCA: 193] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 03/02/2020] [Indexed: 05/02/2023]
Abstract
Manganese (Mn) is an important micronutrient for plant growth and development and sustains metabolic roles within different plant cell compartments. The metal is an essential cofactor for the oxygen-evolving complex (OEC) of the photosynthetic machinery, catalyzing the water-splitting reaction in photosystem II (PSII). Despite the importance of Mn for photosynthesis and other processes, the physiological relevance of Mn uptake and compartmentation in plants has been underrated. The subcellular Mn homeostasis to maintain compartmented Mn-dependent metabolic processes like glycosylation, ROS scavenging, and photosynthesis is mediated by a multitude of transport proteins from diverse gene families. However, Mn homeostasis may be disturbed under suboptimal or excessive Mn availability. Mn deficiency is a serious, widespread plant nutritional disorder in dry, well-aerated and calcareous soils, as well as in soils containing high amounts of organic matter, where bio-availability of Mn can decrease far below the level that is required for normal plant growth. By contrast, Mn toxicity occurs on poorly drained and acidic soils in which high amounts of Mn are rendered available. Consequently, plants have evolved mechanisms to tightly regulate Mn uptake, trafficking, and storage. This review provides a comprehensive overview, with a focus on recent advances, on the multiple functions of transporters involved in Mn homeostasis, as well as their regulatory mechanisms in the plant's response to different conditions of Mn availability.
Collapse
Affiliation(s)
- Santiago Alejandro
- Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle (Salle), Germany
| | | | | | - Edgar Peiter
- Plant Nutrition Laboratory, Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle (Salle), Germany
| |
Collapse
|
23
|
Hoecker N, Honke A, Frey K, Leister D, Schneider A. Homologous Proteins of the Manganese Transporter PAM71 Are Localized in the Golgi Apparatus and Endoplasmic Reticulum. Plants (Basel) 2020; 9:plants9020239. [PMID: 32069796 PMCID: PMC7076475 DOI: 10.3390/plants9020239] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 12/13/2019] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 01/24/2023]
Abstract
Chloroplast manganese transporter 1 (CMT1) and photosynthesis-affected mutant 71 (PAM71) are two membrane proteins that function sequentially to mediate the passage of manganese across the chloroplast envelope and the thylakoid membrane. CMT1 and PAM71 belong to a small five-member protein family in Arabidopsis thaliana. The other three, photosynthesis-affected mutant 71 like 3 (PML3), PML4 and PML5 are not predicted to reside in chloroplast membranes. In this study, the subcellular localization of PML3:GFP, PML4:GFP and PML5:GFP was determined using transient and stable expression assays. PML3:GFP localizes to the Golgi apparatus, whereas PML4:GFP and PML5:GFP are found in the endoplasmic reticulum. We also examined patterns of PML3, PML4 and PML5 promoter activity. Although the precise expression pattern of each promoter was unique, all three genes were expressed in the leaf vasculature and in roots. Greenhouse grown single mutants pml3, pml4, pml5 and the pml4/pml5 double mutant did not exhibit growth defects, however an inspection of the root growth revealed a difference between pml3 and the other genotypes, including wild-type, in 500 µM manganese growth conditions. Strikingly, overexpression of PML3 resulted in a stunted growth phenotype. Putative functions of PML3, PML4 and PML5 are discussed in light of what is known about PAM71 and CMT1.
Collapse
|
24
|
Stribny J, Thines L, Deschamps A, Goffin P, Morsomme P. The human Golgi protein TMEM165 transports calcium and manganese in yeast and bacterial cells. J Biol Chem 2020; 295:3865-3874. [PMID: 32047108 DOI: 10.1074/jbc.ra119.012249] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/10/2020] [Indexed: 01/17/2023] Open
Abstract
Cases of congenital disorders of glycosylation (CDG) have been associated with specific mutations within the gene encoding the human Golgi TMEM165 (transmembrane protein 165), belonging to UPF0016 (uncharacterized protein family 0016), a family of secondary ion transporters. To date, members of this family have been reported to be involved in calcium, manganese, and pH homeostases. Although it has been suggested that TMEM165 has cation transport activity, direct evidence for its Ca2+- and Mn2+-transporting activities is still lacking. Here, we functionally characterized human TMEM165 by heterologously expressing it in budding yeast (Saccharomyces cerevisiae) and in the bacterium Lactococcus lactis Protein production in these two microbial hosts was enhanced by codon optimization and truncation of the putatively autoregulatory N terminus of TMEM165. We show that TMEM165 expression in a yeast strain devoid of Golgi Ca2+ and Mn2+ transporters abrogates Ca2+- and Mn2+-induced growth defects, excessive Mn2+ accumulation in the cell, and glycosylation defects. Using bacterial cells loaded with the fluorescent Fura-2 probe, we further obtained direct biochemical evidence that TMEM165 mediates Ca2+ and Mn2+ influxes. We also used the yeast and bacterial systems to evaluate the impact of four disease-causing missense mutations identified in individuals with TMEM165-associated CDG. We found that a mutation leading to a E108G substitution within the conserved UPF0016 family motif significantly reduces TMEM165 activity. These results indicate that TMEM165 can transport Ca2+ and Mn2+, which are both required for proper protein glycosylation in cells. Our work also provides tools to better understand the pathogenicity of CDG-associated TMEM165 mutations.
Collapse
Affiliation(s)
- Jiri Stribny
- Louvain Institute of Biomolecular Science and Technology, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Louise Thines
- Louvain Institute of Biomolecular Science and Technology, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Antoine Deschamps
- Louvain Institute of Biomolecular Science and Technology, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Philippe Goffin
- Cellular and Molecular Microbiology Lab, Université Libre de Bruxelles, B-6041 Gosselies, Belgium
| | - Pierre Morsomme
- Louvain Institute of Biomolecular Science and Technology, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| |
Collapse
|
25
|
Navazio L, Formentin E, Cendron L, Szabò I. Chloroplast Calcium Signaling in the Spotlight. Front Plant Sci 2020; 11:186. [PMID: 32226434 PMCID: PMC7081724 DOI: 10.3389/fpls.2020.00186] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 02/07/2020] [Indexed: 05/22/2023]
Abstract
Calcium has long been known to regulate the metabolism of chloroplasts, concerning both light and carbon reactions of photosynthesis, as well as additional non photosynthesis-related processes. In addition to undergo Ca2+ regulation, chloroplasts can also influence the overall Ca2+ signaling pathways of the plant cell. Compelling evidence indicate that chloroplasts can generate specific stromal Ca2+ signals and contribute to the fine tuning of cytoplasmic Ca2+ signaling in response to different environmental stimuli. The recent set up of a toolkit of genetically encoded Ca2+ indicators, targeted to different chloroplast subcompartments (envelope, stroma, thylakoids) has helped to unravel the participation of chloroplasts in intracellular Ca2+ handling in resting conditions and during signal transduction. Intra-chloroplast Ca2+ signals have been demonstrated to occur in response to specific environmental stimuli, suggesting a role for these plant-unique organelles in transducing Ca2+-mediated stress signals. In this mini-review we present current knowledge of stimulus-specific intra-chloroplast Ca2+ transients, as well as recent advances in the identification and characterization of Ca2+-permeable channels/transporters localized at chloroplast membranes. In particular, the potential role played by cMCU, a chloroplast-localized member of the mitochondrial calcium uniporter (MCU) family, as component of plant environmental sensing is discussed in detail, taking into account some specific structural features of cMCU. In summary, the recent molecular identification of some players of chloroplast Ca2+ signaling has opened new avenues in this rapidly developing field and will hopefully allow a deeper understanding of the role of chloroplasts in shaping physiological responses in plants.
Collapse
Affiliation(s)
- Lorella Navazio
- Department of Biology, University of Padova, Padova, Italy
- Botanical Garden, University of Padova, Padova, Italy
| | - Elide Formentin
- Department of Biology, University of Padova, Padova, Italy
- Botanical Garden, University of Padova, Padova, Italy
| | - Laura Cendron
- Department of Biology, University of Padova, Padova, Italy
| | - Ildikò Szabò
- Department of Biology, University of Padova, Padova, Italy
- Botanical Garden, University of Padova, Padova, Italy
- *Correspondence: Ildikò Szabò,
| |
Collapse
|
26
|
Abstract
Manganese (Mn) is essential for life on earth. As a catalyst of the water oxidation reaction within photosystem II, the trace metal is responsible for the evolution of virtually all oxygen in the earth’s atmosphere. Mn acts furthermore as an activator or cofactor of numerous enzymes involved in reactive oxygen species scavenging or central and secondary metabolism. While the sufficient supply of oxygenic photosynthetic organisms with Mn is obvious for maintaining photosynthetic activity, the avoidance of cellular Mn overload is also critical. In this review, current knowledge about the Mn homeostasis network in the model cyanobacterium Synechocystis sp. PCC 6803 is presented, including transporters and regulators.
Collapse
Affiliation(s)
- Marion Eisenhut
- Biochemie der Pflanzen, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| |
Collapse
|
27
|
Lebredonchel E, Houdou M, Potelle S, de Bettignies G, Schulz C, Krzewinski Recchi MA, Lupashin V, Legrand D, Klein A, Foulquier F. Dissection of TMEM165 function in Golgi glycosylation and its Mn 2+ sensitivity. Biochimie 2019; 165:123-130. [PMID: 31351090 DOI: 10.1016/j.biochi.2019.07.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 05/29/2019] [Accepted: 07/18/2019] [Indexed: 02/04/2023]
Abstract
Since 2012, the interest for TMEM165 increased due to its implication in a rare genetic human disease named TMEM165-CDG (Congenital Disorder(s) of Glycosylation). TMEM165 is a Golgi localized protein, highly conserved through evolution and belonging to the uncharacterized protein family 0016 (UPF0016). Although the precise function of TMEM165 in glycosylation is still controversial, our results highly suggest that TMEM165 would act as a Golgi Ca2+/Mn2+ transporter regulating both Ca2+ and Mn2+ Golgi homeostasis, the latter is required as a major cofactor of many Golgi glycosylation enzymes. Strikingly, we recently demonstrated that besides its role in regulating Golgi Mn2+ homeostasis and consequently Golgi glycosylation, TMEM165 is sensitive to high manganese exposure. Members of the UPF0016 family contain two particularly highly conserved consensus motifs E-φ-G-D-[KR]-[TS] predicted to be involved in the ion transport function of UPF0016 members. We investigate the contribution of these two specific motifs in the function of TMEM165 in Golgi glycosylation and in its Mn2+ sensitivity. Our results show the crucial importance of these two conserved motifs and underline the contribution of some specific amino acids in both Golgi glycosylation and Mn2+ sensitivity.
Collapse
Affiliation(s)
- Elodie Lebredonchel
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France; Centre de Biologie et Pathologie, UAM de Glycopathologies, Lille Medical Center, University of Lille, 59000, Lille, France
| | - Marine Houdou
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Sven Potelle
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Geoffroy de Bettignies
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Céline Schulz
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Marie-Ange Krzewinski Recchi
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Vladimir Lupashin
- Department of Physiology and Biophysics, College of Medicine, University of Arkansas for Medical Sciences, Biomed 261-2, Slot 505, 200 South Cedar St., Little Rock, AR, 72205, USA
| | - Dominique Legrand
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - André Klein
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France; Centre de Biologie et Pathologie, UAM de Glycopathologies, Lille Medical Center, University of Lille, 59000, Lille, France
| | - François Foulquier
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France.
| |
Collapse
|
28
|
Grossman A, Sanz-Luque E, Yi H, Yang W. Building the GreenCut2 suite of proteins to unmask photosynthetic function and regulation. Microbiology (Reading) 2019; 165:697-718. [DOI: 10.1099/mic.0.000788] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Arthur Grossman
- Department of Plant Biology, Carnegie Institution for Science, Stanford, CA, USA
| | - Emanuel Sanz-Luque
- Department of Plant Biology, Carnegie Institution for Science, Stanford, CA, USA
| | - Heng Yi
- Key Laboratory of Photobiology, Institute of Botany (CAS), Beijing, PR China
- University of Chinese Academy of Sciences, Beijing, PR China
| | - Wenqiang Yang
- Key Laboratory of Photobiology, Institute of Botany (CAS), Beijing, PR China
- University of Chinese Academy of Sciences, Beijing, PR China
| |
Collapse
|
29
|
Affiliation(s)
- Simon Stael
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.
- VIB-UGent Center for Plant Systems Biology, Ghent, Belgium.
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.
- VIB-UGent Center for Medical Biotechnology, Ghent, Belgium.
| |
Collapse
|
30
|
Teardo E, Carraretto L, Moscatiello R, Cortese E, Vicario M, Festa M, Maso L, De Bortoli S, Calì T, Vothknecht UC, Formentin E, Cendron L, Navazio L, Szabo I. A chloroplast-localized mitochondrial calcium uniporter transduces osmotic stress in Arabidopsis. Nat Plants 2019; 5:581-588. [PMID: 31182842 DOI: 10.1038/s41477-019-0434-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 04/23/2019] [Indexed: 05/18/2023]
Abstract
Chloroplasts are integral to sensing biotic and abiotic stress in plants, but their role in transducing Ca2+-mediated stress signals remains poorly understood1,2. Here we identify cMCU, a member of the mitochondrial calcium uniporter (MCU) family, as an ion channel mediating Ca2+ flux into chloroplasts in vivo. Using a toolkit of aequorin reporters targeted to chloroplast stroma and the cytosol in cMCU wild-type and knockout lines, we provide evidence that stress-stimulus-specific Ca2+ dynamics in the chloroplast stroma correlate with expression of the channel. Fast downstream signalling events triggered by osmotic stress, involving activation of the mitogen-activated protein kinases (MAPK) MAPK3 and MAPK6, and the transcription factors MYB60 and ethylene-response factor 6 (ERF6), are influenced by cMCU activity. Relative to wild-type plants, cMCU knockouts display increased resistance to long-term water deficit and improved recovery on rewatering. Modulation of stromal Ca2+ in specific processing of stress signals identifies cMCU as a component of plant environmental sensing.
Collapse
Affiliation(s)
- Enrico Teardo
- Department of Biology, University of Padova, Padova, Italy
| | | | | | - Enrico Cortese
- Department of Biology, University of Padova, Padova, Italy
| | - Mattia Vicario
- Department of Biology, University of Padova, Padova, Italy
| | | | - Lorenzo Maso
- Department of Biology, University of Padova, Padova, Italy
| | | | - Tito Calì
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | | | - Elide Formentin
- Department of Biology, University of Padova, Padova, Italy.
- Botanical Garden, University of Padova, Padova, Italy.
| | - Laura Cendron
- Department of Biology, University of Padova, Padova, Italy
| | - Lorella Navazio
- Department of Biology, University of Padova, Padova, Italy.
- Botanical Garden, University of Padova, Padova, Italy.
| | - Ildiko Szabo
- Department of Biology, University of Padova, Padova, Italy.
- Botanical Garden, University of Padova, Padova, Italy.
| |
Collapse
|
31
|
Schmidt SB, George TS, Brown LK, Booth A, Wishart J, Hedley PE, Martin P, Russell J, Husted S. Ancient barley landraces adapted to marginal soils demonstrate exceptional tolerance to manganese limitation. Ann Bot 2019; 123:831-843. [PMID: 30561497 PMCID: PMC6526322 DOI: 10.1093/aob/mcy215] [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: 09/13/2018] [Accepted: 11/05/2018] [Indexed: 05/28/2023]
Abstract
BACKGROUND AND AIMS Micronutrient deficiency in cereals is a problem of global significance, severely reducing grain yield and quality in marginal soils. Ancient landraces represent, through hundreds of years of local adaptation to adverse soil conditions, a unique reservoir of genes and unexplored traits for enhancing yield and abiotic stress tolerance. Here we explored and compared the genetic variation in a population of Northern European barley landraces and modern elite varieties, and their tolerance to manganese (Mn) limitation. METHODS A total of 135 barley accessions were genotyped and the genetic diversity was explored using Neighbor-Joining clustering. Based on this analysis, a sub-population of genetically diverse landraces and modern elite control lines were evaluated phenotypically for their ability to cope with Mn-deficient conditions, across three different environments increasing in complexity from hydroponics through pot experiments to regional field trials. KEY RESULTS Genetically a group of Scottish barley landraces (Bere barley) were found to cluster according to their island of origin, and accessions adapted to distinct biogeographical zones with reduced soil fertility had particularly larger Mn, but also zinc (Zn) and copper (Cu) concentrations in the shoot. Strikingly, when grown in an alkaline sandy soil in the field, the locally adapted landraces demonstrated an exceptional ability to acquire and translocate Mn to developing leaves, maintain photosynthesis and generate robust grain yields, whereas modern elite varieties totally failed to complete their life cycle. CONCLUSIONS Our results highlight the importance of gene pools of local adaptation and the value of ancient landrace material to identify and characterize genes that control nutrient use efficiency traits in adverse environments to raise future crop production and improve agricultural sustainability in marginal soils. We propose and discuss a model summarizing the physiological mechanisms involved in the complex trait of tolerance to Mn limitation.
Collapse
Affiliation(s)
- Sidsel Birkelund Schmidt
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Frederiksberg C., Denmark
| | | | | | - Allan Booth
- The James Hutton Institute, Invergowrie, Dundee, UK
| | - John Wishart
- The Agronomy Institute, Orkney College, University of the Highlands and Islands, Orkney, UK
| | | | - Peter Martin
- The Agronomy Institute, Orkney College, University of the Highlands and Islands, Orkney, UK
| | | | - Søren Husted
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Frederiksberg C., Denmark
| |
Collapse
|
32
|
Lysenko EA, Klaus AA, Kartashov AV, Kusnetsov VV. Distribution of Cd and other cations between the stroma and thylakoids: a quantitative approach to the search for Cd targets in chloroplasts. Photosynth Res 2019; 139:337-358. [PMID: 29931614 DOI: 10.1007/s11120-018-0528-6] [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: 02/23/2018] [Accepted: 05/31/2018] [Indexed: 05/02/2023]
Abstract
Plant growth and photosynthetic activity are usually inhibited due to the overall action of Cd on a whole organism, though few cadmium cations can invade chloroplasts in vivo. We found that in vivo, the major portion of Cd in barley chloroplasts is located in the thylakoids (80%), and the minor portion is in the stroma (20%). Therefore, the electron-transport chain in the thylakoids would be the likely target for direct Cd action in vivo. In vitro, we found the distribution of Cd to be shifted to the stroma (40-60%). In barley chloroplasts, the major portions of Mg, Fe, Mn, and Cu were found to be located in the thylakoids, and most Ca, Zn, and K in the stroma. This finding was true for both control and Cu- or Fe-treated plants. Treatment with Cd affected the contents of all cations, and the largest portions of Ca and Zn were in the thylakoids. Alterations of the K and Mn contents were caused by Cd, Cu, or Fe treatment; the levels of other cations in chloroplasts were changed specifically by Cd treatment. The quantity of Cd in chloroplasts was small in comparison to that of Mg, Ca, and Fe. In thylakoids, the amount of Cd was similar to that of Cu and comparable to the levels of Zn and Mn. Accordingly, the possible targets for direct Cd action in thylakoids are the Mn cluster, plastocyanin, carbonic anhydrase, or FtsH protease. The quantity of Cd in thylakoids is sufficient to replace a cation nearly completely at one of these sites or partially (20-30%) at many of these sites.
Collapse
Affiliation(s)
- Eugene A Lysenko
- Institute of Plant Physiology, Russian Academy of Sciences, ul. Botanicheskay 35, Moscow, Russia, 127276.
| | - Alexander A Klaus
- Institute of Plant Physiology, Russian Academy of Sciences, ul. Botanicheskay 35, Moscow, Russia, 127276
| | - Alexander V Kartashov
- Institute of Plant Physiology, Russian Academy of Sciences, ul. Botanicheskay 35, Moscow, Russia, 127276
| | - Victor V Kusnetsov
- Institute of Plant Physiology, Russian Academy of Sciences, ul. Botanicheskay 35, Moscow, Russia, 127276
| |
Collapse
|
33
|
Davis GA, Kramer DM. Optimization of ATP Synthase c-Rings for Oxygenic Photosynthesis. Front Plant Sci 2019; 10:1778. [PMID: 32082344 PMCID: PMC7003800 DOI: 10.3389/fpls.2019.01778] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 12/20/2019] [Indexed: 05/10/2023]
Abstract
The conversion of sunlight into useable cellular energy occurs via the proton-coupled electron transfer reactions of photosynthesis. Light is absorbed by photosynthetic pigments and transferred to photochemical reaction centers to initiate electron and proton transfer reactions to store energy in a redox gradient and an electrochemical proton gradient (proton motive force, pmf), composed of a concentration gradient (ΔpH) and an electric field (Δψ), which drives the synthesis of ATP through the thylakoid FoF1-ATP synthase. Although ATP synthase structure and function are conserved across biological kingdoms, the number of membrane-embedded ion-binding c subunits varies between organisms, ranging from 8 to 17, theoretically altering the H+/ATP ratio for different ATP synthase complexes, with profound implications for the bioenergetic processes of cellular metabolism. Of the known c-ring stoichiometries, photosynthetic c-rings are among the largest identified stoichiometries, and it has been proposed that decreasing the c-stoichiometry could increase the energy conversion efficiency of photosynthesis. Indeed, there is strong evidence that the high H+/ATP of the chloroplast ATP synthase results in a low ATP/nicotinamide adenine dinucleotide phosphate (NADPH) ratio produced by photosynthetic linear electron flow, requiring secondary processes such as cyclic electron flow to support downstream metabolism. We hypothesize that the larger c subunit stoichiometry observed in photosynthetic ATP synthases was selected for because it allows the thylakoid to maintain pmf in a range where ATP synthesis is supported, but avoids excess Δψ and ΔpH, both of which can lead to production of reactive oxygen species and subsequent photodamage. Numerical kinetic simulations of the energetics of chloroplast photosynthetic reactions with altered c-ring size predicts the energy storage of pmf and its effects on the photochemical reaction centers strongly support this hypothesis, suggesting that, despite the low efficiency and suboptimal ATP/NADPH ratio, a high H+/ATP is favored to avoid photodamage. This has important implications for the evolution and regulation of photosynthesis as well as for synthetic biology efforts to alter photosynthetic efficiency by engineering the ATP synthase.
Collapse
Affiliation(s)
- Geoffry A. Davis
- Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI, United States
| | - David M. Kramer
- Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI, United States
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, United States
- *Correspondence: David M. Kramer,
| |
Collapse
|
34
|
Marchand J, Heydarizadeh P, Schoefs B, Spetea C. Ion and metabolite transport in the chloroplast of algae: lessons from land plants. Cell Mol Life Sci 2018; 75:2153-2176. [PMID: 29541792 PMCID: PMC5948301 DOI: 10.1007/s00018-018-2793-0] [Citation(s) in RCA: 35] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 03/01/2018] [Accepted: 03/07/2018] [Indexed: 12/28/2022]
Abstract
Chloroplasts are endosymbiotic organelles and play crucial roles in energy supply and metabolism of eukaryotic photosynthetic organisms (algae and land plants). They harbor channels and transporters in the envelope and thylakoid membranes, mediating the exchange of ions and metabolites with the cytosol and the chloroplast stroma and between the different chloroplast subcompartments. In secondarily evolved algae, three or four envelope membranes surround the chloroplast, making more complex the exchange of ions and metabolites. Despite the importance of transport proteins for the optimal functioning of the chloroplast in algae, and that many land plant homologues have been predicted, experimental evidence and molecular characterization are missing in most cases. Here, we provide an overview of the current knowledge about ion and metabolite transport in the chloroplast from algae. The main aspects reviewed are localization and activity of the transport proteins from algae and/or of homologues from other organisms including land plants. Most chloroplast transporters were identified in the green alga Chlamydomonas reinhardtii, reside in the envelope and participate in carbon acquisition and metabolism. Only a few identified algal transporters are located in the thylakoid membrane and play role in ion transport. The presence of genes for putative transporters in green algae, red algae, diatoms, glaucophytes and cryptophytes is discussed, and roles in the chloroplast are suggested. A deep knowledge in this field is required because algae represent a potential source of biomass and valuable metabolites for industry, medicine and agriculture.
Collapse
Affiliation(s)
- Justine Marchand
- Metabolism, Bioengineering of Microalgal Molecules and Applications (MIMMA), Mer Molécules Santé, IUML, FR 3473 CNRS, Le Mans University, 72000, Le Mans, France
| | - Parisa Heydarizadeh
- Metabolism, Bioengineering of Microalgal Molecules and Applications (MIMMA), Mer Molécules Santé, IUML, FR 3473 CNRS, Le Mans University, 72000, Le Mans, France
| | - Benoît Schoefs
- Metabolism, Bioengineering of Microalgal Molecules and Applications (MIMMA), Mer Molécules Santé, IUML, FR 3473 CNRS, Le Mans University, 72000, Le Mans, France.
| | - Cornelia Spetea
- Department of Biological and Environmental Sciences, University of Gothenburg, 40530, Göteborg, Sweden.
| |
Collapse
|
35
|
Sello S, Moscatiello R, Mehlmer N, Leonardelli M, Carraretto L, Cortese E, Zanella FG, Baldan B, Szabò I, Vothknecht UC, Navazio L. Chloroplast Ca 2+ Fluxes into and across Thylakoids Revealed by Thylakoid-Targeted Aequorin Probes. Plant Physiol 2018; 177:38-51. [PMID: 29559589 PMCID: PMC5933129 DOI: 10.1104/pp.18.00027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 03/05/2018] [Indexed: 05/18/2023]
Abstract
Chloroplasts require a fine-tuned control of their internal Ca2+ concentration, which is crucial for many aspects of photosynthesis and for other chloroplast-localized processes. Increasing evidence suggests that calcium regulation within chloroplasts also may influence Ca2+ signaling pathways in the cytosol. To investigate the involvement of thylakoids in Ca2+ homeostasis and in the modulation of chloroplast Ca2+ signals in vivo, we targeted the bioluminescent Ca2+ reporter aequorin as a YFP fusion to the lumen and the stromal surface of thylakoids in Arabidopsis (Arabidopsis thaliana). Thylakoid localization of aequorin-based probes in stably transformed lines was confirmed by confocal microscopy, immunogold labeling, and biochemical analyses. In resting conditions in the dark, free Ca2+ levels in the thylakoid lumen were maintained at about 0.5 μm, which was a 3- to 5-fold higher concentration than in the stroma. Monitoring of chloroplast Ca2+ dynamics in different intrachloroplast subcompartments (stroma, thylakoid membrane, and thylakoid lumen) revealed the occurrence of stimulus-specific Ca2+ signals, characterized by unique kinetic parameters. Oxidative and salt stresses initiated pronounced free Ca2+ changes in the thylakoid lumen. Localized Ca2+ increases also were observed on the thylakoid membrane surface, mirroring transient Ca2+ changes observed for the bulk stroma, but with specific Ca2+ dynamics. Moreover, evidence was obtained for dark-stimulated intrathylakoid Ca2+ changes, suggesting a new scenario for light-to-dark-induced Ca2+ fluxes inside chloroplasts. Hence, thylakoid-targeted aequorin reporters can provide new insights into chloroplast Ca2+ storage and signal transduction. These probes represent novel tools with which to investigate the role of thylakoids in Ca2+ signaling networks within chloroplasts and plant cells.
Collapse
Affiliation(s)
- Simone Sello
- Department of Biology, University of Padova, 35131 Padova, Italy
| | | | - Norbert Mehlmer
- Department of Biology I, Faculty of Biology, LMU Munich, D-82152 Munich, Germany
| | - Manuela Leonardelli
- Department of Biology, University of Padova, 35131 Padova, Italy
- Department of Biology I, Faculty of Biology, LMU Munich, D-82152 Munich, Germany
| | - Luca Carraretto
- Department of Biology, University of Padova, 35131 Padova, Italy
| | - Enrico Cortese
- Department of Biology, University of Padova, 35131 Padova, Italy
| | | | - Barbara Baldan
- Department of Biology, University of Padova, 35131 Padova, Italy
- Botanical Garden, University of Padova, 35123 Padova, Italy
| | - Ildikò Szabò
- Department of Biology, University of Padova, 35131 Padova, Italy
- Botanical Garden, University of Padova, 35123 Padova, Italy
| | - Ute C Vothknecht
- Department of Biology I, Faculty of Biology, LMU Munich, D-82152 Munich, Germany
- Plant Cell Biology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, D-53115 Bonn, Germany
| | - Lorella Navazio
- Department of Biology, University of Padova, 35131 Padova, Italy
- Botanical Garden, University of Padova, 35123 Padova, Italy
| |
Collapse
|
36
|
Thines L, Deschamps A, Sengottaiyan P, Savel O, Stribny J, Morsomme P. The yeast protein Gdt1p transports Mn 2+ ions and thereby regulates manganese homeostasis in the Golgi. J Biol Chem 2018; 293:8048-8055. [PMID: 29632074 DOI: 10.1074/jbc.ra118.002324] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [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: 02/07/2018] [Revised: 04/05/2018] [Indexed: 11/06/2022] Open
Abstract
The uncharacterized protein family 0016 (UPF0016) is a family of secondary ion transporters implicated in calcium homeostasis and some diseases. More precisely, genetic variants of the human UPF0016 ortholog transmembrane protein 165 (TMEM165) have been linked to congenital disorders of glycosylation (CDG). The Saccharomyces cerevisiae ortholog Gdt1p has been shown to be involved in calcium homeostasis and protein glycosylation. Moreover, plant and bacterial UPF0016 members appear to have putative roles in Mn2+ homeostasis. Here, we produced the yeast UPF0016 member Gdt1p in the bacterial host Lactococcus lactis Using Mn2+-induced quenching of Fura-2-emitted fluorescence, we observed that Gdt1p mediates Mn2+ influx, in addition to its previously reported regulation of Ca2+ influx. The estimated Km values of Gdt1p of 15.6 ± 2.6 μm for Ca2+ and 83.2 ± 9.8 μm for Mn2+ indicated that Gdt1p has a higher affinity for Ca2+ than for Mn2+ In yeast cells, we found that Gdt1p is involved in the resistance to high Mn2+ concentration and controls total Mn2+ stores. Lastly, we demonstrated that GDT1 deletion affects the activity of the yeast Mn2+-dependent Sod2p superoxide dismutase, most likely by modulating cytosolic Mn2+ concentrations. Taken together, we obtained first evidence that Gdt1p from yeast directly transports manganese, which strongly reinforces the suggested link between the UPF0016 family and Mn2+ homeostasis and provides new insights into the molecular causes of human TMEM165-associated CDGs. Our results also shed light on how yeast cells may regulate Golgi intraluminal concentrations of manganese, a key cofactor of many enzymes involved in protein glycosylation.
Collapse
Affiliation(s)
- Louise Thines
- Institut des Sciences de la Vie, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Antoine Deschamps
- Institut des Sciences de la Vie, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Palanivelu Sengottaiyan
- Institut des Sciences de la Vie, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Oksana Savel
- Institut des Sciences de la Vie, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Jiri Stribny
- Institut des Sciences de la Vie, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
| | - Pierre Morsomme
- Institut des Sciences de la Vie, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium.
| |
Collapse
|
37
|
Davis GA, Rutherford AW, Kramer DM. Hacking the thylakoid proton motive force for improved photosynthesis: modulating ion flux rates that control proton motive force partitioning into Δ ψ and ΔpH. Philos Trans R Soc Lond B Biol Sci 2018; 372:rstb.2016.0381. [PMID: 28808100 DOI: 10.1098/rstb.2016.0381] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2017] [Indexed: 11/12/2022] Open
Abstract
There is considerable interest in improving plant productivity by altering the dynamic responses of photosynthesis in tune with natural conditions. This is exemplified by the 'energy-dependent' form of non-photochemical quenching (qE), the formation and decay of which can be considerably slower than natural light fluctuations, limiting photochemical yield. In addition, we recently reported that rapidly fluctuating light can produce field recombination-induced photodamage (FRIP), where large spikes in electric field across the thylakoid membrane (Δψ) induce photosystem II recombination reactions that produce damaging singlet oxygen (1O2). Both qE and FRIP are directly linked to the thylakoid proton motive force (pmf), and in particular, the slow kinetics of partitioning pmf into its ΔpH and Δψ components. Using a series of computational simulations, we explored the possibility of 'hacking' pmf partitioning as a target for improving photosynthesis. Under a range of illumination conditions, increasing the rate of counter-ion fluxes across the thylakoid membrane should lead to more rapid dissipation of Δψ and formation of ΔpH. This would result in increased rates for the formation and decay of qE while resulting in a more rapid decline in the amplitudes of Δψ-spikes and decreasing 1O2 production. These results suggest that ion fluxes may be a viable target for plant breeding or engineering. However, these changes also induce transient, but substantial mismatches in the ATP : NADPH output ratio as well as in the osmotic balance between the lumen and stroma, either of which may explain why evolution has not already accelerated thylakoid ion fluxes. Overall, though the model is simplified, it recapitulates many of the responses seen in vivo, while spotlighting critical aspects of the complex interactions between pmf components and photosynthetic processes. By making the programme available, we hope to enable the community of photosynthesis researchers to further explore and test specific hypotheses.This article is part of the themed issue 'Enhancing photosynthesis in crop plants: targets for improvement'.
Collapse
Affiliation(s)
- Geoffry A Davis
- Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA.,Cell and Molecular Biology Graduate Program, Michigan State University, East Lansing, MI 48824, USA
| | | | - David M Kramer
- Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA .,Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
| |
Collapse
|
38
|
Dulary E, Yu S, Houdou M, de Bettignies G, Decool V, Potelle S, Duvet S, Krzewinski-recchi M, Garat A, Matthijs G, Guerardel Y, Foulquier F. Investigating the function of Gdt1p in yeast Golgi glycosylation. Biochim Biophys Acta Gen Subj 2018; 1862:394-402. [DOI: 10.1016/j.bbagen.2017.11.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 10/06/2017] [Accepted: 11/01/2017] [Indexed: 11/20/2022]
|
39
|
Zeinert R, Martinez E, Schmitz J, Senn K, Usman B, Anantharaman V, Aravind L, Waters LS. Structure-function analysis of manganese exporter proteins across bacteria. J Biol Chem 2018; 293:5715-5730. [PMID: 29440394 DOI: 10.1074/jbc.m117.790717] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [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: 04/10/2017] [Revised: 01/26/2018] [Indexed: 01/01/2023] Open
Abstract
Manganese (Mn) is an essential trace nutrient for organisms because of its role in cofactoring enzymes and providing protection against reactive oxygen species (ROS). Many bacteria require manganese to form pathogenic or symbiotic interactions with eukaryotic host cells. However, excess manganese is toxic, requiring cells to have manganese export mechanisms. Bacteria are currently known to possess two widely distributed classes of manganese export proteins, MntP and MntE, but other types of transporters likely exist. Moreover, the structure and function of MntP is not well understood. Here, we characterized the role of three structurally related proteins known or predicted to be involved in manganese transport in bacteria from the MntP, UPF0016, and TerC families. These studies used computational analysis to analyze phylogeny and structure, physiological assays to test sensitivity to high levels of manganese and ROS, and inductively coupled plasma-mass spectrometry (ICP-MS) to measure metal levels. We found that MntP alters cellular resistance to ROS. Moreover, we used extensive computational analyses and phenotypic assays to identify amino acids required for MntP activity. These negatively charged residues likely serve to directly bind manganese and transport it from the cytoplasm through the membrane. We further characterized two other potential manganese transporters associated with a Mn-sensing riboswitch and found that the UPF0016 family of proteins has manganese export activity. We provide here the first phenotypic and biochemical evidence for the role of Alx, a member of the TerC family, in manganese homeostasis. It does not appear to export manganese, but rather it intriguingly facilitates an increase in intracellular manganese concentration. These findings expand the available knowledge about the identity and mechanisms of manganese homeostasis proteins across bacteria and show that proximity to a Mn-responsive riboswitch can be used to identify new components of the manganese homeostasis machinery.
Collapse
Affiliation(s)
- Rilee Zeinert
- From the Department of Chemistry, University of Wisconsin, Oshkosh, Wisconsin 54901 and
| | - Eli Martinez
- From the Department of Chemistry, University of Wisconsin, Oshkosh, Wisconsin 54901 and
| | - Jennifer Schmitz
- From the Department of Chemistry, University of Wisconsin, Oshkosh, Wisconsin 54901 and
| | - Katherine Senn
- From the Department of Chemistry, University of Wisconsin, Oshkosh, Wisconsin 54901 and
| | - Bakhtawar Usman
- From the Department of Chemistry, University of Wisconsin, Oshkosh, Wisconsin 54901 and
| | - Vivek Anantharaman
- the National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894
| | - L Aravind
- the National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894
| | - Lauren S Waters
- From the Department of Chemistry, University of Wisconsin, Oshkosh, Wisconsin 54901 and
| |
Collapse
|
40
|
Xing J, Liu P, Zhao L, Huang F. Deletion of CGLD1 Impairs PSII and Increases Singlet Oxygen Tolerance of Green Alga Chlamydomonas reinhardtii. Front Plant Sci 2017; 8:2154. [PMID: 29326747 PMCID: PMC5736878 DOI: 10.3389/fpls.2017.02154] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 12/05/2017] [Indexed: 05/24/2023]
Abstract
The green alga Chlamydomonas reinhardtii is a key model organism for studying photosynthesis and oxidative stress in unicellular eukaryotes. Using a forward genetics approach, we have identified and characterized a mutant x32, which lacks a predicted protein named CGLD1 (Conserved in Green Lineage and Diatom 1) in GreenCut2, under normal and stress conditions. We show that loss of CGLD1 resulted in minimal photoautotrophic growth and PSII activity in the organism. We observed reduced amount of PSII complex and core subunits in the x32 mutant based on blue-native (BN)/PAGE and immunoblot analysis. Moreover, x32 exhibited increased sensitivity to high-light stress and altered tolerance to different reactive oxygenic species (ROS) stress treatments, i.e., decreased resistance to H2O2/or tert-Butyl hydroperoxide (t-BOOH) and increased tolerance to neutral red (NR) and rose bengal (RB) that induce the formation of singlet oxygen, respectively. Further analysis via quantitative real-time PCR (qRT-PCR) indicated that the increased singlet-oxygen tolerance of x32 was largely correlated with up-regulated gene expression of glutathione-S-transferases (GST). The phenotypical and physiological implications revealed from our experiments highlight the important roles of CGLD1 in maintaining structure and function of PSII as well as in protection of Chlamydomonas under photo-oxidative stress conditions.
Collapse
Affiliation(s)
- Jiale Xing
- Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Peng Liu
- Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lei Zhao
- Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Fang Huang
- Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
41
|
Alejandro S, Cailliatte R, Alcon C, Dirick L, Domergue F, Correia D, Castaings L, Briat JF, Mari S, Curie C. Intracellular Distribution of Manganese by the Trans-Golgi Network Transporter NRAMP2 Is Critical for Photosynthesis and Cellular Redox Homeostasis. Plant Cell 2017; 29:3068-3084. [PMID: 29180598 PMCID: PMC5757278 DOI: 10.1105/tpc.17.00578] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 11/17/2017] [Accepted: 11/25/2017] [Indexed: 05/18/2023]
Abstract
Plants require trace levels of manganese (Mn) for survival, as it is an essential cofactor in oxygen metabolism, especially O2 production via photosynthesis and the disposal of superoxide radicals. These processes occur in specialized organelles, requiring membrane-bound intracellular transporters to partition Mn between cell compartments. We identified an Arabidopsis thaliana member of the NRAMP family of divalent metal transporters, NRAMP2, which functions in the intracellular distribution of Mn. Two knockdown alleles of NRAMP2 showed decreased activity of photosystem II and increased oxidative stress under Mn-deficient conditions, yet total Mn content remained unchanged. At the subcellular level, these phenotypes were associated with a loss of Mn content in vacuoles and chloroplasts. NRAMP2 was able to rescue the mitochondrial yeast mutant mtm1∆ In plants, NRAMP2 is a resident protein of the trans-Golgi network. NRAMP2 may act indirectly on downstream organelles by building up a cytosolic pool that is used to feed target compartments. Moreover, not only does the nramp2 mutant accumulate superoxide ions, but NRAMP2 can functionally replace cytosolic superoxide dismutase in yeast, indicating that the pool of Mn displaced by NRAMP2 is required for the detoxification of reactive oxygen species.
Collapse
Affiliation(s)
- Santiago Alejandro
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| | - Rémy Cailliatte
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| | - Carine Alcon
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| | - Léon Dirick
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| | - Frédéric Domergue
- Laboratoire de Biogénèse Membranaire CNRS, Université de Bordeaux, UMR 5200, F-33140 Villenave d'Ornon, France
| | - David Correia
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| | - Loren Castaings
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| | - Jean-François Briat
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| | - Stéphane Mari
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| | - Catherine Curie
- BPMP, CNRS, INRA, Montpellier SupAgro, Université de Montpellier, F-34060 Montpellier, France
| |
Collapse
|
42
|
Salomé PA. Manganese Is a Plant's Best Friend: Intracellular Mn Transport by the Transporter NRAMP2. Plant Cell 2017; 29:2953-2954. [PMID: 29242315 PMCID: PMC5757265 DOI: 10.1105/tpc.17.00965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Patrice A Salomé
- Department of Chemistry and BiochemistryUniversity of California, Los Angeles
| |
Collapse
|
43
|
Brandenburg F, Schoffman H, Kurz S, Krämer U, Keren N, Weber APM, Eisenhut M. The Synechocystis Manganese Exporter Mnx Is Essential for Manganese Homeostasis in Cyanobacteria. Plant Physiol 2017; 173:1798-1810. [PMID: 28153926 PMCID: PMC5338678 DOI: 10.1104/pp.16.01895] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 01/26/2017] [Indexed: 05/05/2023]
Abstract
The essential micronutrient manganese (Mn) functions as redox-active cofactor in active sites of enzymes and, thus, is involved in various physiological reactions. Moreover, in oxygenic photosynthetic organisms, Mn is of special importance, since it is central to the oxygen-evolving complex in photosystem II. Although Mn is an essential micronutrient, increased amounts are detrimental to the organism; thus, only a small window exists for beneficial concentrations. Accordingly, Mn homeostasis must be carefully maintained. In contrast to the well-studied uptake mechanisms in cyanobacteria, it is largely unknown how Mn is distributed to the different compartments inside the cell. We identified a protein with so far unknown function as a hypothetical Mn transporter in the cyanobacterial model strain Synechocystis sp. PCC 6803 and named this protein Mnx for Mn exporter. The knockout mutant Δmnx showed increased sensitivity toward externally supplied Mn and Mn toxicity symptoms, which could be linked to intracellular Mn accumulation. 54Mn chase experiments demonstrated that the mutant was not able to release Mn from the internal pool. Microscopic analysis of a Mnx::yellow fluorescent protein fusion showed that the protein resides in the thylakoid membrane. Heterologous expression of mnx suppressed the Mn-sensitive phenotype of the Saccharomyces cerevisiae mutant Δpmr1 Our results indicate that Mnx functions as a thylakoid Mn transporter and is a key player in maintaining Mn homeostasis in Synechocystis sp. PCC 6803. We propose that Mn export from the cytoplasm into the thylakoid lumen is crucial to prevent toxic cytoplasmic Mn accumulation and to ensure Mn provision to photosystem II.
Collapse
Affiliation(s)
- Fabian Brandenburg
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Science, Heinrich Heine University, 40225 Duesseldorf, Germany (F.B., S.K., A.P.M.W., M.E.)
- Department of Plant and Environmental Sciences, Institute of Life Sciences, Hebrew University of Jerusalem, 91904 Jerusalem, Israel (H.S., N.K.); and
- Department of Plant Physiology, Ruhr University, 44801 Bochum, Germany (U.K.)
| | - Hanan Schoffman
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Science, Heinrich Heine University, 40225 Duesseldorf, Germany (F.B., S.K., A.P.M.W., M.E.)
- Department of Plant and Environmental Sciences, Institute of Life Sciences, Hebrew University of Jerusalem, 91904 Jerusalem, Israel (H.S., N.K.); and
- Department of Plant Physiology, Ruhr University, 44801 Bochum, Germany (U.K.)
| | - Samantha Kurz
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Science, Heinrich Heine University, 40225 Duesseldorf, Germany (F.B., S.K., A.P.M.W., M.E.)
- Department of Plant and Environmental Sciences, Institute of Life Sciences, Hebrew University of Jerusalem, 91904 Jerusalem, Israel (H.S., N.K.); and
- Department of Plant Physiology, Ruhr University, 44801 Bochum, Germany (U.K.)
| | - Ute Krämer
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Science, Heinrich Heine University, 40225 Duesseldorf, Germany (F.B., S.K., A.P.M.W., M.E.)
- Department of Plant and Environmental Sciences, Institute of Life Sciences, Hebrew University of Jerusalem, 91904 Jerusalem, Israel (H.S., N.K.); and
- Department of Plant Physiology, Ruhr University, 44801 Bochum, Germany (U.K.)
| | - Nir Keren
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Science, Heinrich Heine University, 40225 Duesseldorf, Germany (F.B., S.K., A.P.M.W., M.E.)
- Department of Plant and Environmental Sciences, Institute of Life Sciences, Hebrew University of Jerusalem, 91904 Jerusalem, Israel (H.S., N.K.); and
- Department of Plant Physiology, Ruhr University, 44801 Bochum, Germany (U.K.)
| | - Andreas P M Weber
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Science, Heinrich Heine University, 40225 Duesseldorf, Germany (F.B., S.K., A.P.M.W., M.E.)
- Department of Plant and Environmental Sciences, Institute of Life Sciences, Hebrew University of Jerusalem, 91904 Jerusalem, Israel (H.S., N.K.); and
- Department of Plant Physiology, Ruhr University, 44801 Bochum, Germany (U.K.)
| | - Marion Eisenhut
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Science, Heinrich Heine University, 40225 Duesseldorf, Germany (F.B., S.K., A.P.M.W., M.E.)
- Department of Plant and Environmental Sciences, Institute of Life Sciences, Hebrew University of Jerusalem, 91904 Jerusalem, Israel (H.S., N.K.); and
- Department of Plant Physiology, Ruhr University, 44801 Bochum, Germany (U.K.)
| |
Collapse
|
44
|
Hoecker N, Leister D, Schneider A. Plants contain small families of UPF0016 proteins including the PHOTOSYNTHESIS AFFECTED MUTANT71 transporter. Plant Signal Behav 2017; 12:e1278101. [PMID: 28075225 PMCID: PMC5351731 DOI: 10.1080/15592324.2016.1278101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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
PHOTOSYNTHESIS AFFECTED MUTANT71 (PAM71) is an integral thylakoid membrane protein that functions in manganese uptake into the lumen. Manganese is needed in the thylakoid lumen to build up the inorganic Mn4CaO5 cluster, the catalytic center for water oxidation, and is hence indispensable for oxygen evolution. A recent study revealed that PAM71 is well conserved in plants and shares homology to GCR1 DEPENDENT TRANSLATION FACTOR1 (GDT1) and TRANSMEMBRANE PROTEIN 165 (TMEM165) in Saccharomyces cerevisiae and Homo sapiens, respectively. In most eukaryotes only single members of this family, designated "Uncharacterized Protein Family 0016" (UPF0016), are present; however, plant genomes contain genes for several UPF0016 proteins. In Arabidopsis thaliana, this protein family comprises 5 members, which mainly differ in their N-terminal regions. PAM71 and its closest homolog PAM71-HL possess chloroplast transit peptides at their N-terminus. Two of the remaining 3 members are derived from a segmental chromosomal duplication event and lack an N-terminal extension. Thus, plants have evolved UPF0016 members residing in various compartments of the cell, whereas in non-plant eukaryotes just a Golgi localization occurs. The identification of PAM71 as a candidate Mn2+ transporter opens the question on the function of the remaining plant members. Here we resume briefly our current knowledge of UPF0016 members in Arabidopsis in comparison to their yeast and human UPF0016 members.
Collapse
Affiliation(s)
- Natalie Hoecker
- Department of Biology I, Plant Sciences, Ludwig-Maximilians Universität München, Martinsried, Germany
| | - Dario Leister
- Department of Biology I, Plant Sciences, Ludwig-Maximilians Universität München, Martinsried, Germany
| | - Anja Schneider
- Department of Biology I, Plant Sciences, Ludwig-Maximilians Universität München, Martinsried, Germany
- CONTACT Anja Schneider
| |
Collapse
|
45
|
Harms A, Steinberger I, Schneider A. Cation (Ca2+ and Mn2+) Partitioning Assays with Intact Arabidopsis Chloroplasts. Bio Protoc 2017; 7:e2094. [DOI: 10.21769/bioprotoc.2094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 10/07/2016] [Accepted: 12/06/2016] [Indexed: 11/02/2022] Open
|
46
|
Huang XQ, Zhao L, Rui JD, Zhou CF, Zhuang Z, Lu S. At5g19540 Encodes a Novel Protein That Affects Pigment Metabolism and Chloroplast Development in Arabidopsis thaliana. Front Plant Sci 2017; 8:2140. [PMID: 29312395 PMCID: PMC5742152 DOI: 10.3389/fpls.2017.02140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Accepted: 12/04/2017] [Indexed: 05/04/2023]
Abstract
Chlorophylls and carotenoids not only function in photosynthesis and photoprotection but are also involved in the assembly of thylakoid membranes and the stabilization of apoproteins in photosystems. In this study, we identified a nuclear gene required for chlorophyll and carotenoid metabolism, namely, DWARF AND YELLOW 1 (DY1). Growth of the loss-of-function dy1 mutant was severely retarded, and the seedlings of this mutant accumulated significantly less amounts of both chlorophylls and carotenoids in cotyledons and rosette leaves, although genes related to pigment metabolism did not show corresponding fluctuation at the transcriptional level. In chloroplasts of the dy1 leaves, thylakoids were loosely packed into grana. The dy1 mutant also possessed severely impaired photosynthetic and photoprotective abilities. DY1 encodes a chloroplast stroma protein that is highly conserved in vascular plants. Our results demonstrated that after the full-length DY1 (53 kDa) was imported into the chloroplast and its N-terminal transit peptide was processed, the C-terminal end of this premature DY1 (42 kDa) was also removed during the maturation of rosette leaves, resulting in a 24-kDa mature peptide. Our blue native PAGE and Western blot analyses showed the presence of both premature and mature forms of DY1 in protein complexes. The involvement of DY1 in chloroplast development is discussed.
Collapse
|
47
|
Rodríguez-Celma J, Tsai YH, Wen TN, Wu YC, Curie C, Schmidt W. Systems-wide analysis of manganese deficiency-induced changes in gene activity of Arabidopsis roots. Sci Rep 2016; 6:35846. [PMID: 27804982 PMCID: PMC5090222 DOI: 10.1038/srep35846] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/06/2016] [Indexed: 11/09/2022] Open
Abstract
Manganese (Mn) is pivotal for plant growth and development, but little information is available regarding the strategies that evolved to improve Mn acquisition and cellular homeostasis of Mn. Using an integrated RNA-based transcriptomic and high-throughput shotgun proteomics approach, we generated a comprehensive inventory of transcripts and proteins that showed altered abundance in response to Mn deficiency in roots of the model plant Arabidopsis. A suite of 22,385 transcripts was consistently detected in three RNA-seq runs; LC-MS/MS-based iTRAQ proteomics allowed the unambiguous determination of 11,606 proteins. While high concordance between mRNA and protein expression (R = 0.87) was observed for transcript/protein pairs in which both gene products accumulated differentially upon Mn deficiency, only approximately 10% of the total alterations in the abundance of proteins could be attributed to transcription, indicating a large impact of protein-level regulation. Differentially expressed genes spanned a wide range of biological functions, including the maturation, translation, and transport of mRNAs, as well as primary and secondary metabolic processes. Metabolic analysis by UPLC-qTOF-MS revealed that the steady-state levels of several major glucosinolates were significantly altered upon Mn deficiency in both roots and leaves, possibly as a compensation for increased pathogen susceptibility under conditions of Mn deficiency.
Collapse
Affiliation(s)
- Jorge Rodríguez-Celma
- Institute of Plant and Microbial Biology, Academia Sinica, 128 Academia Road, Taipei, Taiwan
| | - Yi-Hsiu Tsai
- Institute of Plant and Microbial Biology, Academia Sinica, 128 Academia Road, Taipei, Taiwan
| | - Tuan-Nan Wen
- Institute of Plant and Microbial Biology, Academia Sinica, 128 Academia Road, Taipei, Taiwan
| | - Yu-Ching Wu
- Institute of Plant and Microbial Biology, Academia Sinica, 128 Academia Road, Taipei, Taiwan
| | - Catherine Curie
- Biochimie et Physiologie Moléculaire des Plantes, Centre National de la Recherche Scientifique, Institut National pour la Recherche Agronomique, Laboratoire de Biochimie et Physiologie Moléculaire des Plantes, INRA/SupAgro, Université Montpellier 2, Montpellier, France
| | - Wolfgang Schmidt
- Institute of Plant and Microbial Biology, Academia Sinica, 128 Academia Road, Taipei, Taiwan.,Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, Taiwan.,Genome and Systems Biology Degree Program, College of Life Science, National Taiwan University, Taipei, Taiwan
| |
Collapse
|
48
|
Marik A, Naiya H, Das M, Mukherjee G, Basu S, Saha C, Chowdhury R, Bhattacharyya K, Seal A. Split-ubiquitin yeast two-hybrid interaction reveals a novel interaction between a natural resistance associated macrophage protein and a membrane bound thioredoxin in Brassica juncea. Plant Mol Biol 2016; 92:519-537. [PMID: 27534419 DOI: 10.1007/s11103-016-0528-x] [Citation(s) in RCA: 2] [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: 08/20/2015] [Accepted: 08/10/2016] [Indexed: 06/06/2023]
Abstract
Natural resistance associated macrophage proteins (NRAMPs) are evolutionarily conserved metal transporters involved in the transport of essential and nonessential metals in plants. Fifty protein interactors of a Brassica juncea NRAMP protein was identified by a Split-Ubiquitin Yeast-Two-Hybrid screen. The interactors were predicted to function as components of stress response, signaling, development, RNA binding and processing. BjNRAMP4.1 interactors were particularly enriched in proteins taking part in photosynthetic or light regulated processes, or proteins predicted to be localized in plastid/chloroplast. Further, many interactors also had a suggested role in cellular redox regulation. Among these, the interaction of a photosynthesis-related thioredoxin, homologous to Arabidopsis HCF164 (High-chlorophyll fluorescence164) was studied in detail. Homology modeling of BjNRAMP4.1 suggested that it could be redox regulated by BjHCF164. In yeast, the interaction between the two proteins was found to increase in response to metal deficiency; Mn excess and exogenous thiol. Excess Mn also increased the interaction in planta and led to greater accumulation of the complex at the root apoplast. Network analysis of Arabidopsis homologs of BjNRAMP4.1 interactors showed enrichment of many protein components, central to chloroplastic/cellular ROS signaling. BjNRAMP4.1 interacted with BjHCF164 at the root membrane and also in the chloroplast in accordance with its proposed function related to photosynthesis, indicating that this interaction occurred at different sub-cellular locations depending on the tissue. This may serve as a link between metal homeostasis and chloroplastic/cellular ROS through protein-protein interaction.
Collapse
Affiliation(s)
- Ananya Marik
- Department of Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Haraprasad Naiya
- Department of Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Madhumanti Das
- Department of Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Gairik Mukherjee
- Department of Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Soumalee Basu
- Department of Microbiology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Chinmay Saha
- Department of Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Rajdeep Chowdhury
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, 2A and 2B Raja S.C Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Kankan Bhattacharyya
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, 2A and 2B Raja S.C Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Anindita Seal
- Department of Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India.
| |
Collapse
|
49
|
Schmidt SB, Jensen PE, Husted S. Manganese Deficiency in Plants: The Impact on Photosystem II. Trends Plant Sci 2016; 21:622-632. [PMID: 27150384 DOI: 10.1016/j.tplants.2016.03.001] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [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: 11/18/2015] [Revised: 03/08/2016] [Accepted: 03/19/2016] [Indexed: 05/04/2023]
Abstract
Manganese (Mn) is an essential plant micronutrient with an indispensable function as a catalyst in the oxygen-evolving complex (OEC) of photosystem II (PSII). Even so, Mn deficiency frequently occurs without visual leaf symptoms, thereby masking the distribution and dimension of the problem restricting crop productivity in many places of the world. Hence, timely alleviation of latent Mn deficiency is a challenge in promoting plant growth and quality. We describe here the key mechanisms of Mn deficiency in plants by focusing on the impact of Mn on PSII stability and functionality. We also address the mechanisms underlying the differential tolerance towards Mn deficiency observed among plant genotypes, which enable Mn-efficient plants to grow on marginal land with poor Mn availability.
Collapse
Affiliation(s)
- Sidsel Birkelund Schmidt
- Plant and Soil Science Section, Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Poul Erik Jensen
- Molecular Plant Biology Section, Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Søren Husted
- Plant and Soil Science Section, Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark.
| |
Collapse
|
50
|
Lockhart J. Special Delivery: A Crucial Protein That Transports Manganese to the Oxygen-Evolving Complex of Photosystem II. Plant Cell 2016; 28:826. [PMID: 27053423 PMCID: PMC4863394 DOI: 10.1105/tpc.16.00269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
|