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Fox AR, Scochera F, Laloux T, Filik K, Degand H, Morsomme P, Alleva K, Chaumont F. Plasma membrane aquaporins interact with the endoplasmic reticulum resident VAP27 proteins at ER-PM contact sites and endocytic structures. THE NEW PHYTOLOGIST 2020; 228:973-988. [PMID: 33410187 PMCID: PMC7586982 DOI: 10.1111/nph.16743] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/01/2020] [Indexed: 05/24/2023]
Abstract
Plasma membrane (PM) intrinsic proteins (PIPs) are aquaporins facilitating the diffusion of water and small solutes. The functional importance of the PM organisation of PIPs in the interaction with other cellular structures is not completely understood. We performed a pull-down assay using maize (Zea mays) suspension cells expressing YFP-ZmPIP2;5 and validated the protein interactions by yeast split-ubiquitin and bimolecular fluorescence complementation assays. We expressed interacting proteins tagged with fluorescent proteins in Nicotiana benthamiana leaves and performed water transport assays in oocytes. Finally, a phylogenetic analysis was conducted. The PM-located ZmPIP2;5 physically interacts with the endoplasmic reticulum (ER) resident ZmVAP27-1. This interaction requires the ZmVAP27-1 cytoplasmic major sperm domain. ZmPIP2;5 and ZmVAP27-1 localise in close vicinity in ER-PM contact sites (EPCSs) and endocytic structures upon exposure to salt stress conditions. This interaction enhances PM water permeability in oocytes. Similarly, the Arabidopsis ZmVAP27-1 paralogue, AtVAP27-1, interacts with the AtPIP2;7 aquaporin. Together, these data indicate that the PIP2-VAP27 interaction in EPCSs is evolutionarily conserved, and suggest that VAP27 might stabilise the aquaporins and guide their endocytosis in response to salt stress.
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Affiliation(s)
- Ana Romina Fox
- Louvain Institute of Biomolecular Science and TechnologyUCLouvainLouvain‐la‐Neuve1348Belgium
- Facultad de Farmacia y BioquímicaInstituto de Química y Fisicoquímica Biológica (IQUIFIB)CONICETUniversidad de Buenos AiresBuenos Aires1113Argentina
| | - Florencia Scochera
- Facultad de Farmacia y BioquímicaInstituto de Química y Fisicoquímica Biológica (IQUIFIB)CONICETUniversidad de Buenos AiresBuenos Aires1113Argentina
- Facultad de Farmacia y BioquímicaDepartamento de FisicomatemáticaUniversidad de Buenos AiresBuenos Aires1113Argentina
| | - Timothée Laloux
- Louvain Institute of Biomolecular Science and TechnologyUCLouvainLouvain‐la‐Neuve1348Belgium
| | - Karolina Filik
- Louvain Institute of Biomolecular Science and TechnologyUCLouvainLouvain‐la‐Neuve1348Belgium
| | - Hervé Degand
- Louvain Institute of Biomolecular Science and TechnologyUCLouvainLouvain‐la‐Neuve1348Belgium
| | - Pierre Morsomme
- Louvain Institute of Biomolecular Science and TechnologyUCLouvainLouvain‐la‐Neuve1348Belgium
| | - Karina Alleva
- Facultad de Farmacia y BioquímicaInstituto de Química y Fisicoquímica Biológica (IQUIFIB)CONICETUniversidad de Buenos AiresBuenos Aires1113Argentina
- Facultad de Farmacia y BioquímicaDepartamento de FisicomatemáticaUniversidad de Buenos AiresBuenos Aires1113Argentina
| | - François Chaumont
- Louvain Institute of Biomolecular Science and TechnologyUCLouvainLouvain‐la‐Neuve1348Belgium
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102
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Mom R, Muries B, Benoit P, Robert-Paganin J, Réty S, Venisse JS, Padua A, Label P, Auguin D. Voltage-gating of aquaporins, a putative conserved safety mechanism during ionic stresses. FEBS Lett 2020; 595:41-57. [PMID: 32997337 DOI: 10.1002/1873-3468.13944] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 09/19/2020] [Indexed: 11/10/2022]
Abstract
Aquaporins are transmembrane water channels found in almost every living organism. Numerous studies have brought a good understanding of both water transport through their pores and the regulations taking place at the molecular level, but subtleties remain to be clarified. Recently, a voltage-related gating mechanism involving the conserved arginine of the channel's main constriction was captured for human aquaporins through molecular dynamics studies. With a similar approach, we show that this voltage-gating could be conserved among this family and that the underlying mechanism could explain part of plant AQPs diversity when contextualized to high ionic concentrations provoked by drought. Finally, we identified residues as adaptive traits which constitute good targets for drought resistance plant breeding research.
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Affiliation(s)
- Robin Mom
- UCA, INRAE, UMR PIAF, Clermont-Ferrand, France
| | | | | | - Julien Robert-Paganin
- Structural Motility, Institut Curie, Paris Université Sciences et Lettres, CNRS UMR144, Sorbonne Université, Paris, France
| | - Stéphane Réty
- Laboratoire de Biologie et Modélisation de la Cellule, ENS de Lyon, CNRS UMR 5239, INSERM U1210, University Claude Bernard, Lyon, France
| | | | - Agilio Padua
- Laboratoire de Chimie, ENS de Lyon, CNRS, Université de Lyon, Lyon, France
| | | | - Daniel Auguin
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, UPRES EA 1207, INRAE-USC1328, Université d'Orléans, Orléans, France
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103
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Identification of nitric oxide (NO)-responsive genes under hypoxia in tomato (Solanum lycopersicum L.) root. Sci Rep 2020; 10:16509. [PMID: 33020554 PMCID: PMC7536229 DOI: 10.1038/s41598-020-73613-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 09/14/2020] [Indexed: 12/04/2022] Open
Abstract
Flooding periods, as one probable consequence of climate change, will lead more frequently to plant hypoxic stress. Hypoxia sensing and signaling in the root, as the first organ encountering low oxygen, is therefore crucial for plant survival under flooding. Nitric oxide has been shown to be one of the main players involved in hypoxia signaling through the regulation of ERFVII transcription factors stability. Using SNP as NO donor, we investigated the NO-responsive genes, which showed a significant response to hypoxia. We identified 395 genes being differentially regulated under both hypoxia and SNP-treatment. Among them, 251 genes showed up- or down-regulation under both conditions which were used for further biological analysis. Functional classification of these genes showed that they belong to different biological categories such as primary carbon and nitrogen metabolism (e.g. glycolysis, fermentation, protein and amino acid metabolism), nutrient and metabolites transport, redox homeostasis, hormone metabolism, regulation of transcription as well as response to biotic and abiotic stresses. Our data shed light on the NO-mediated gene expression modulation under hypoxia and provides potential targets playing a role in hypoxia tolerance. These genes are interesting candidates for further investigating their role in hypoxia signaling and survival.
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104
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Grondin A, Affortit P, Tranchant-Dubreuil C, de la Fuente-Cantó C, Mariac C, Gantet P, Vadez V, Vigouroux Y, Laplaze L. Aquaporins are main contributors to root hydraulic conductivity in pearl millet [Pennisetum glaucum (L) R. Br.]. PLoS One 2020; 15:e0233481. [PMID: 33001997 PMCID: PMC7529256 DOI: 10.1371/journal.pone.0233481] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 09/11/2020] [Indexed: 11/19/2022] Open
Abstract
Pearl millet is a key cereal for food security in arid and semi-arid regions but its yield is increasingly threatened by water stress. Physiological mechanisms relating to conservation of soil water or increased water use efficiency can alleviate that stress. Aquaporins (AQP) are water channels that mediate root water transport, thereby influencing plant hydraulics, transpiration and soil water conservation. However, AQP remain largely uncharacterized in pearl millet. Here, we studied AQP function in root water transport in two pearl millet lines contrasting for water use efficiency (WUE). We observed that these lines also contrasted for root hydraulic conductivity (Lpr) and AQP contribution to Lpr. The line with lower WUE showed significantly higher AQP contribution to Lpr. To investigate AQP isoforms contributing to Lpr, we developed genomic approaches to first identify the entire AQP family in pearl millet and secondly, characterize the plasma membrane intrinsic proteins (PIP) gene expression profile. We identified and annotated 33 AQP genes in pearl millet, among which ten encoded PIP isoforms. PgPIP1-3 and PgPIP1-4 were significantly more expressed in the line showing lower WUE, higher Lpr and higher AQP contribution to Lpr. Overall, our study suggests that the PIP1 AQP family are the main regulators of Lpr in pearl millet and may possibly be associated with mechanisms associated to whole plant water use. This study paves the way for further investigations on AQP functions in pearl millet hydraulics and adaptation to environmental stresses.
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Affiliation(s)
- Alexandre Grondin
- UMR DIADE, IRD, Université de Montpellier, Montpellier, France
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés Aux Stress Environnementaux, Dakar, Senegal
- Laboratoire Commun de Microbiologie, Dakar, Senegal
- Centre d’Étude Régional pour l’Amélioration de l’Adaptation à la Sécheresse, Thiès, Senegal
- * E-mail:
| | - Pablo Affortit
- UMR DIADE, IRD, Université de Montpellier, Montpellier, France
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés Aux Stress Environnementaux, Dakar, Senegal
| | | | | | - Cédric Mariac
- UMR DIADE, IRD, Université de Montpellier, Montpellier, France
| | - Pascal Gantet
- UMR DIADE, IRD, Université de Montpellier, Montpellier, France
| | - Vincent Vadez
- UMR DIADE, IRD, Université de Montpellier, Montpellier, France
- International Crops Research Institute for Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Yves Vigouroux
- UMR DIADE, IRD, Université de Montpellier, Montpellier, France
| | - Laurent Laplaze
- UMR DIADE, IRD, Université de Montpellier, Montpellier, France
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés Aux Stress Environnementaux, Dakar, Senegal
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105
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Qiu J, McGaughey SA, Groszmann M, Tyerman SD, Byrt CS. Phosphorylation influences water and ion channel function of AtPIP2;1. PLANT, CELL & ENVIRONMENT 2020; 43:2428-2442. [PMID: 32678928 DOI: 10.1111/pce.13851] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 07/09/2020] [Accepted: 07/09/2020] [Indexed: 05/24/2023]
Abstract
The phosphorylation state of two serine residues within the C-terminal domain of AtPIP2;1 (S280, S283) regulates its plasma membrane localization in response to salt and osmotic stress. Here, we investigated whether the phosphorylation state of S280 and S283 also influence AtPIP2;1 facilitated water and cation transport. A series of single and double S280 and S283 phosphomimic and phosphonull AtPIP2;1 mutants were tested in heterologous systems. In Xenopus laevis oocytes, phosphomimic mutants AtPIP2;1 S280D, S283D, and S280D/S283D had significantly greater ion conductance for Na+ and K+ , whereas the S280A single phosphonull mutant had greater water permeability. We observed a phosphorylation-dependent inverse relationship between AtPIP2;1 water and ion transport with a 10-fold change in both. The results revealed that phosphorylation of S280 and S283 influences the preferential facilitation of ion or water transport by AtPIP2;1. The results also hint that other regulatory sites play roles that are yet to be elucidated. Expression of the AtPIP2;1 phosphorylation mutants in Saccharomyces cerevisiae confirmed that phosphorylation influences plasma membrane localization, and revealed higher Na+ accumulation for S280A and S283D mutants. Collectively, the results show that phosphorylation in the C-terminal domain of AtPIP2;1 influences its subcellular localization and cation transport capacity.
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Affiliation(s)
- Jiaen Qiu
- ARC Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia
| | - Samantha A McGaughey
- ARC Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia
- ARC Centre of Excellence for Translational Photosynthesis, Division of Plant Sciences, Research School of Biology, Australian National University, Acton, Australia
| | - Michael Groszmann
- ARC Centre of Excellence for Translational Photosynthesis, Division of Plant Sciences, Research School of Biology, Australian National University, Acton, Australia
| | - Stephen D Tyerman
- ARC Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia
| | - Caitlin S Byrt
- ARC Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia
- ARC Centre of Excellence for Translational Photosynthesis, Division of Plant Sciences, Research School of Biology, Australian National University, Acton, Australia
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106
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Understanding aquaporin transport system in highly stress-tolerant and medicinal plant species Jujube (Ziziphus jujuba Mill.). J Biotechnol 2020; 324:103-111. [PMID: 33007348 DOI: 10.1016/j.jbiotec.2020.09.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 07/22/2020] [Accepted: 09/27/2020] [Indexed: 01/14/2023]
Abstract
Jujube (Ziziphus jujubaMill.), a deciduous tree, is well known for its medicinal and nutritional values. Being an extremophile, it has an excellent capability to survive under arid conditions with limited water availability. In this regard, studying the role of water transport regulating proteins such as Aquaporins (AQPs) in jujube is of great importance. Aquaporins, channel-forming proteins are known to have a significant role in the transport of water and many other small solutes in plants. In the present study, computational approaches have identified 36 AQPs, which comprised of 12 NIPs (Nodulin 26-like intrinsic proteins), 10 PIPs (Plasma membrane intrinsic proteins), 10 TIPs (Tonoplast intrinsic proteins), 3 SIPs (Small intrinsic proteins), and 1 XIP (uncharacterized intrinsic protein). Conserved features of AQPs like asparagines-proline-alanine (NPA) amino acid motifs, aromatic/arginine (ar/R) selectivity filters, and Frogger's residues, having a significant role in solute specificity and transport, were also predicted. Homology-based tertiary (3D) structures of AQPS were also resolved using various tools, and subsequently, pore-lining residues have been identified using the 3D structures. The information of pore morphology, along with the conserved features provided through this work, will be helpful to predict solute specificity of AQPs. Analysis of transcriptomic data revealed the tissue-specific or ubiquitous expression of several AQPs in different tissues of jujube. Interestingly, TIP3-1 was found to have fruit specific expression whereas most of the AQPs have a relatively low expression. Based on the present study and previous reports, TIP3s seems to have a significant role in seed desiccation processes. The findings presented here provide pivotal insights into the functions of extremophile specific AQPs, to better understand the role of AQPs and, subsequently, the stress tolerance mechanism in jujube.
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107
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Tran STH, Horie T, Imran S, Qiu J, McGaughey S, Byrt CS, Tyerman SD, Katsuhara M. A Survey of Barley PIP Aquaporin Ionic Conductance Reveals Ca 2+-Sensitive HvPIP2;8 Na + and K + Conductance. Int J Mol Sci 2020; 21:E7135. [PMID: 32992595 PMCID: PMC7582361 DOI: 10.3390/ijms21197135] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/25/2020] [Accepted: 09/25/2020] [Indexed: 02/02/2023] Open
Abstract
Some plasma membrane intrinsic protein (PIP) aquaporins can facilitate ion transport. Here we report that one of the 12 barley PIPs (PIP1 and PIP2) tested, HvPIP2;8, facilitated cation transport when expressed in Xenopus laevis oocytes. HvPIP2;8-associated ion currents were detected with Na+ and K+, but not Cs+, Rb+, or Li+, and was inhibited by Ba2+, Ca2+, and Cd2+ and to a lesser extent Mg2+, which also interacted with Ca2+. Currents were reduced in the presence of K+, Cs+, Rb+, or Li+ relative to Na+ alone. Five HvPIP1 isoforms co-expressed with HvPIP2;8 inhibited the ion conductance relative to HvPIP2;8 alone but HvPIP1;3 and HvPIP1;4 with HvPIP2;8 maintained the ion conductance at a lower level. HvPIP2;8 water permeability was similar to that of a C-terminal phosphorylation mimic mutant HvPIP2;8 S285D, but HvPIP2;8 S285D showed a negative linear correlation between water permeability and ion conductance that was modified by a kinase inhibitor treatment. HvPIP2;8 transcript abundance increased in barley shoot tissues following salt treatments in a salt-tolerant cultivar Haruna-Nijo, but not in salt-sensitive I743. There is potential for HvPIP2;8 to be involved in barley salt-stress responses, and HvPIP2;8 could facilitate both water and Na+/K+ transport activity, depending on the phosphorylation status.
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Affiliation(s)
- Sen Thi Huong Tran
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki 710-0046, Japan; (S.T.H.T.); (S.I.)
- Faculty of Agronomy, University of Agriculture and Forestry, Hue University, Hue 530000, Vietnam
| | - Tomoaki Horie
- Division of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1, Tokida, Ueda, Nagano 386-8567, Japan;
| | - Shahin Imran
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki 710-0046, Japan; (S.T.H.T.); (S.I.)
| | - Jiaen Qiu
- Australian Research Council Centre of Excellence in Plant Energy Biology, Waite Research Institute and School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, Adelaide 5064, Australia; (J.Q.); (C.S.B.); (S.D.T.)
| | - Samantha McGaughey
- Research School of Biology, Australian National University, Canberra 2600, Australia;
| | - Caitlin S. Byrt
- Australian Research Council Centre of Excellence in Plant Energy Biology, Waite Research Institute and School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, Adelaide 5064, Australia; (J.Q.); (C.S.B.); (S.D.T.)
- Research School of Biology, Australian National University, Canberra 2600, Australia;
| | - Stephen D. Tyerman
- Australian Research Council Centre of Excellence in Plant Energy Biology, Waite Research Institute and School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, Adelaide 5064, Australia; (J.Q.); (C.S.B.); (S.D.T.)
| | - Maki Katsuhara
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki 710-0046, Japan; (S.T.H.T.); (S.I.)
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108
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Yue K, Jiang J, Zhang P, Kai L. Functional Analysis of Aquaporin Water Permeability Using an Escherichia coli-Based Cell-Free Protein Synthesis System. Front Bioeng Biotechnol 2020; 8:1000. [PMID: 32974321 PMCID: PMC7466572 DOI: 10.3389/fbioe.2020.01000] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 07/31/2020] [Indexed: 11/13/2022] Open
Abstract
Aquaporins are essential water channel proteins found in all kingdoms of life. Although the water permeability of aquaporins has been well characterized, sample preparation for aquaporin water permeability assays remains challenging and time-consuming. Besides the difficulty in overexpressing membrane proteins in a cell-based expression system, the unique requirement for homogeneity in aquaporin proteoliposome sample preparations for water transport assays further increases the complexity. In this study, a complementary Cell-free Protein Synthesis (CFPS) method is described in detail, providing three different strategies for the preparation of aquaporin proteoliposome samples. Aquaporin can be produced either as a pellet fraction and then resolubilized, or co-translationally as a detergent-soluble fraction. Furthermore, aquaporin can be directly incorporated into liposomes, which was included in the CFPS reactions. Although proteoliposomes tend to fuse during the incubation of the CFPS reactions, an additional treatment of the fused samples with detergent, followed by a detergent removal step, can re-form homogenously sized proteoliposomes suitable for functional analysis. Using this method, we successfully characterized aquaporins from both prokaryotic and eukaryotic organisms. In particular, in the presence of liposomes, the developed CFPS expression system is a fast and convenient method for sample preparation for the functional analysis of aquaporins.
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Affiliation(s)
- Ke Yue
- The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, China
| | - Jihong Jiang
- The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, China
| | - Peng Zhang
- The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, China
| | - Lei Kai
- The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, School of Life Sciences, Jiangsu Normal University, Xuzhou, China
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109
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Insights into the Selectivity Mechanisms of Grapevine NIP Aquaporins. Int J Mol Sci 2020; 21:ijms21186697. [PMID: 32933135 PMCID: PMC7576499 DOI: 10.3390/ijms21186697] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/05/2020] [Accepted: 09/10/2020] [Indexed: 12/11/2022] Open
Abstract
Nodulin 26-like intrinsic proteins (NIPs) of the plant aquaporin family majorly facilitate the transport of physiologically relevant solutes. The present study intended to investigate how substrate selectivity in grapevine NIPs is influenced by the aromatic/arginine (ar/R) selectivity filter within the pore and the possible underlying mechanisms. A mutational approach was used to interchange the ar/R residues between grapevine NIPs (VvTnNIP1;1 with VvTnNIP6;1, and VvTnNIP2;1 with VvTnNIP5;1). Their functional characterization by stopped-flow spectroscopy in Saccharomyces cerevisiae revealed that mutations in residues of H2/H5 helices in VvTnNIP1;1 and VvTnNIP6;1 caused a general decline in membrane glycerol permeability but did not impart the expected substrate conductivity in the mutants. This result suggests that ar/R filter substitution could alter the NIP channel activity, but it was not sufficient to interchange their substrate preferences. Further, homology modeling analyses evidenced that variations in the pore radius combined with the differences in the channel's physicochemical properties (hydrophilicity/hydrophobicity) may drive substrate selectivity. Furthermore, yeast growth assays showed that H5 residue substitution alleviated the sensitivity of VvTnNIP2;1 and VvTnNIP5;1 to As, B, and Se, implying importance of H5 sequence for substrate selection. These results contribute to the knowledge of the overall determinants of substrate selectivity in NIPs.
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110
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Abe H, Kawasaki A, Takeda T, Hoshino N, Matsuda W, Seki S, Akutagawa T. Switching of Electron and Ion Conductions by Reversible H 2O Sorption in n-Type Organic Semiconductors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:37391-37399. [PMID: 32814389 DOI: 10.1021/acsami.0c09501] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polar H2O molecules generally act as trapping sites and suppress the electron mobility of n-type organic semiconductors, making chemical design of H2O-tolerant and responsive n-type semiconductors an important step toward multifunctional electron-ion coupling devices. The introduction of effective electrostatic interactions between potassium ions (K+) and carboxylate (-COO-) anions into the electron-transporting naphthalenediimide π-framework enables the design of high-performance H2O-tolerant n-type semiconductors with a reversible H2O adsorption-desorption ability, where the electron mobility and K+ ionic conductivity were coupled with the reversible H2O sorption behavior. The reversible H2O adsorption into the crystals enhanced the electron mobility from 0.04 to 0.28 cm2 V-1 s-1, whereas the K+ ionic conductivity decreased from 3.4 × 10-5 to 4.7 × 10-7 S cm-1. Because this reversible electron-ion conducting switch is responsive to H2O sorption behavior, it is a strong candidate for H2O gating carrier transport systems.
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Affiliation(s)
- Haruka Abe
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - Ayumi Kawasaki
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - Takashi Takeda
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Norihisa Hoshino
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Wakana Matsuda
- Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Shu Seki
- Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Tomoyuki Akutagawa
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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111
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Singh S, Bhatt V, Kumar V, Kumawat S, Khatri P, Singla P, Shivaraj S, Nadaf A, Deshmukh R, Sharma TR, Sonah H. Evolutionary Understanding of Aquaporin Transport System in the Basal Eudicot Model Species Aquilegia coerulea. PLANTS 2020; 9:plants9060799. [PMID: 32604788 PMCID: PMC7355465 DOI: 10.3390/plants9060799] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 06/07/2020] [Accepted: 06/22/2020] [Indexed: 01/02/2023]
Abstract
Aquaporins (AQPs) play a pivotal role in the cellular transport of water and many other small solutes, influencing many physiological and developmental processes in plants. In the present study, extensive bioinformatics analysis of AQPs was performed in Aquilegia coerulea L., a model species belonging to basal eudicots, with a particular focus on understanding the AQPs role in the developing petal nectar spur. A total of 29 AQPs were identified in Aquilegia, and their phylogenetic analysis performed with previously reported AQPs from rice, poplar and Arabidopsis depicted five distinct subfamilies of AQPs. Interestingly, comparative analysis revealed the loss of an uncharacterized intrinsic protein II (XIP-II) group in Aquilegia. The absence of the entire XIP subfamily has been reported in several previous studies, however, the loss of a single clade within the XIP family has not been characterized. Furthermore, protein structure analysis of AQPs was performed to understand pore diversity, which is helpful for the prediction of solute specificity. Similarly, an AQP AqcNIP2-1 was identified in Aquilegia, predicted as a silicon influx transporter based on the presence of features such as the G-S-G-R aromatic arginine selectivity filter, the spacing between asparagine-proline-alanine (NPA) motifs and pore morphology. RNA-seq analysis showed a high expression of tonoplast intrinsic proteins (TIPs) and plasma membrane intrinsic proteins (PIPs) in the developing petal spur. The results presented here will be helpful in understanding the AQP evolution in Aquilegia and their expression regulation, particularly during floral development.
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Affiliation(s)
- Shweta Singh
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Vacha Bhatt
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra 411007, India; (V.B.); (A.N.)
| | - Virender Kumar
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Surbhi Kumawat
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
- Department of Biotechnology, Panjab University, Chandigarh 160014, India
| | - Praveen Khatri
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Pankaj Singla
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - S.M. Shivaraj
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Altaf Nadaf
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra 411007, India; (V.B.); (A.N.)
| | - Rupesh Deshmukh
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Tilak Raj Sharma
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
- Division of Crop Science, Indian Council of Agricultural Research, Krishi Bhavan, New Delhi 110001, India
- Correspondence: (T.R.S.); (H.S.); Tel.: +91-172-522-1181 (H.S.)
| | - Humira Sonah
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
- Correspondence: (T.R.S.); (H.S.); Tel.: +91-172-522-1181 (H.S.)
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Dayer S, Scharwies JD, Ramesh SA, Sullivan W, Doerflinger FC, Pagay V, Tyerman SD. Comparing Hydraulics Between Two Grapevine Cultivars Reveals Differences in Stomatal Regulation Under Water Stress and Exogenous ABA Applications. FRONTIERS IN PLANT SCIENCE 2020; 11:705. [PMID: 32636852 PMCID: PMC7316991 DOI: 10.3389/fpls.2020.00705] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 05/05/2020] [Indexed: 05/23/2023]
Abstract
Hydraulics of plants that have different strategies of stomatal regulation under water stress are relatively poorly understood. We explore how root and shoot hydraulics, stomatal conductance (g s), leaf and root aquaporin (AQP) expression, and abscisic acid (ABA) concentration in leaf xylem sap ([ABA]xylemsap) may be coordinated under mild water stress and exogenous ABA applications in two Vitis vinifera L. cultivars traditionally classified as near-isohydric (Grenache) and near-anisohydric (Syrah). Under water stress, Grenache exhibited stronger adjustments of plant and root hydraulic conductances and greater stomatal sensitivity to [ABA]xylemsap than Syrah resulting in greater conservation of soil moisture but not necessarily more isohydric behavior. Correlations between leaf (Ψleaf) and predawn (ΨPD) water potentials between cultivars suggested a "hydrodynamic" behavior rather than a particular iso-anisohydric classification. A significant decrease of Ψleaf in well-watered ABA-fed vines supported a role of ABA in the soil-leaf hydraulic pathway to regulate g s. Correlations between leaf and root AQPs expression levels under water deficit could explain the response of leaf (K leaf) and root (Lp r) hydraulic conductances in both cultivars. Additional studies under a wider range of soil water deficits are required to explore the possible differential regulation of g s and plant hydraulics in different cultivars and experimental conditions.
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Affiliation(s)
- Silvina Dayer
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | - Johannes D. Scharwies
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | - Sunita A. Ramesh
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | - Wendy Sullivan
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | | | - Vinay Pagay
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | - Stephen D. Tyerman
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
- Australian Research Council Centre of Excellence in Plant Energy Biology, Waite Research Institute, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, Australia
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De Rosa A, Watson-Lazowski A, Evans JR, Groszmann M. Genome-wide identification and characterisation of Aquaporins in Nicotiana tabacum and their relationships with other Solanaceae species. BMC PLANT BIOLOGY 2020; 20:266. [PMID: 32517797 PMCID: PMC7285608 DOI: 10.1186/s12870-020-02412-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 04/28/2020] [Indexed: 05/25/2023]
Abstract
BACKGROUND Cellular membranes are dynamic structures, continuously adjusting their composition, allowing plants to respond to developmental signals, stresses, and changing environments. To facilitate transmembrane transport of substrates, plant membranes are embedded with both active and passive transporters. Aquaporins (AQPs) constitute a major family of membrane spanning channel proteins that selectively facilitate the passive bidirectional passage of substrates across biological membranes at an astonishing 108 molecules per second. AQPs are the most diversified in the plant kingdom, comprising of five major subfamilies that differ in temporal and spatial gene expression, subcellular protein localisation, substrate specificity, and post-translational regulatory mechanisms; collectively providing a dynamic transportation network spanning the entire plant. Plant AQPs can transport a range of solutes essential for numerous plant processes including, water relations, growth and development, stress responses, root nutrient uptake, and photosynthesis. The ability to manipulate AQPs towards improving plant productivity, is reliant on expanding our insight into the diversity and functional roles of AQPs. RESULTS We characterised the AQP family from Nicotiana tabacum (NtAQPs; tobacco), a popular model system capable of scaling from the laboratory to the field. Tobacco is closely related to major economic crops (e.g. tomato, potato, eggplant and peppers) and itself has new commercial applications. Tobacco harbours 76 AQPs making it the second largest characterised AQP family. These fall into five distinct subfamilies, for which we characterised phylogenetic relationships, gene structures, protein sequences, selectivity filter compositions, sub-cellular localisation, and tissue-specific expression. We also identified the AQPs from tobacco's parental genomes (N. sylvestris and N. tomentosiformis), allowing us to characterise the evolutionary history of the NtAQP family. Assigning orthology to tomato and potato AQPs allowed for cross-species comparisons of conservation in protein structures, gene expression, and potential physiological roles. CONCLUSIONS This study provides a comprehensive characterisation of the tobacco AQP family, and strengthens the current knowledge of AQP biology. The refined gene/protein models, tissue-specific expression analysis, and cross-species comparisons, provide valuable insight into the evolutionary history and likely physiological roles of NtAQPs and their Solanaceae orthologs. Collectively, these results will support future functional studies and help transfer basic research to applied agriculture.
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Affiliation(s)
- Annamaria De Rosa
- ARC Centre of Excellence for Translational Photosynthesis, Research School of Biology, Australian National University, ACT, Canberra, 2601, Australia
| | - Alexander Watson-Lazowski
- ARC Centre of Excellence for Translational Photosynthesis, Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, 2751, Australia
| | - John R Evans
- ARC Centre of Excellence for Translational Photosynthesis, Research School of Biology, Australian National University, ACT, Canberra, 2601, Australia
| | - Michael Groszmann
- ARC Centre of Excellence for Translational Photosynthesis, Research School of Biology, Australian National University, ACT, Canberra, 2601, Australia.
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Ismail A, El-Sharkawy I, Sherif S. Salt Stress Signals on Demand: Cellular Events in the Right Context. Int J Mol Sci 2020; 21:ijms21113918. [PMID: 32486204 PMCID: PMC7313037 DOI: 10.3390/ijms21113918] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 05/21/2020] [Accepted: 05/28/2020] [Indexed: 12/19/2022] Open
Abstract
Plant stress is a real dilemma; it puzzles plant biologists and is a global problem that negatively affects people’s daily lives. Of particular interest is salinity, because it represents one of the major water-related stress types. We aimed to determine the signals that guide the cellular-related events where various adaptation mechanisms cross-talk to cope with salinity-related water stress in plants. In an attempt to unravel these mechanisms and introduce cellular events in the right context, we expansively discussed how salt-related signals are sensed, with particular emphasis on aquaporins, nonselective cation channels (NSCCs), and glycosyl inositol phosphorylceramide (GIPC). We also elaborated on the critical role Ca2+, H+, and ROS in mediating signal transduction pathways associated with the response and tolerance to salt stress. In addition, the fragmentary results from the literature were compiled to develop a harmonized, informational, and contemplative model that is intended to improve our perception of these adaptative mechanisms and set a common platform for plant biologists to identify intriguing research questions in this area.
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Affiliation(s)
- Ahmed Ismail
- Department of Horticulture, Faculty of Agriculture, Damanhour University, P.O. Box 22516, Damanhour, Egypt;
| | - Islam El-Sharkawy
- Florida A&M University, Center for Viticulture and Small Fruit Research. 6361 Mahan Drive, Tallahassee, FL 32308, USA;
| | - Sherif Sherif
- Alson H. Smith Jr. Agricultural Research and Extension Center, School of Plant and Environmental Sciences, Virginia Tech, Winchester, VA 22062, USA
- Correspondence: ; Tel.: +1-540-232-6035
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Chow PH, Kourghi M, Pei JV, Nourmohammadi S, Yool AJ. 5-Hydroxymethyl-Furfural and Structurally Related Compounds Block the Ion Conductance in Human Aquaporin-1 Channels and Slow Cancer Cell Migration and Invasion. Mol Pharmacol 2020; 98:38-48. [PMID: 32434851 DOI: 10.1124/mol.119.119172] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 04/20/2020] [Indexed: 12/18/2022] Open
Abstract
Aquaporin-1 (AQP1) dual water and ion channels enhance migration and invasion when upregulated in leading edges of certain classes of cancer cells. Work here identifies structurally related furan compounds as novel inhibitors of AQP1 ion channels. 5-Hydroxymethyl-2-furfural (5HMF), a component of natural medicinal honeys, and three structurally related compounds, 5-nitro-2-furoic acid (5NFA), 5-acetoxymethyl-2-furaldehyde (5AMF), and methyl-5-nitro-2-furoate (M5NF), were analyzed for effects on water and ion channel activities of human AQP1 channels expressed in Xenopus oocytes. Two-electrode voltage clamp showed dose-dependent block of the AQP1 ion current by 5HMF (IC50 0.43 mM), 5NFA (IC50 1.2 mM), and 5AMF (IC50 ∼3 mM) but no inhibition by M5NF. In silico docking predicted the active ligands interacted with glycine 165, located in loop D gating domains surrounding the intracellular vestibule of the tetrameric central pore. Water fluxes through separate intrasubunit pores were unaltered by the furan compounds (at concentrations up to 5 mM). Effects on cell migration, invasion, and cytoskeletal organization in vitro were tested in high-AQP1-expressing cancer lines, colon cancer (HT29) and AQP1-expressing breast cancer (MDA), and low-AQP1-expressing SW480. 5HMF, 5NFA, and 5AMF selectively impaired cell motility in the AQP1-enriched cell lines. In contrast, M5NF immobilized all the cancer lines by disrupting actin cytoskeleton. No reduction in cell viability was observed at doses that were effective in blocking motility. These results define furans as a new class of AQP1 ion channel inhibitors for basic research and potential lead compounds for development of therapeutic agents targeting aquaporin channel activity. SIGNIFICANCE STATEMENT: 5-Hydroxymethyl-2-furfural (5HMF), a component of natural medicinal honeys, blocks the ion conductance but not the water flux through human Aquaporin-1 (AQP1) channels and impairs AQP1-dependent cell migration and invasiveness in cancer cell lines. Analyses of 5HMT and structural analogs demonstrate a structure-activity relationship for furan compounds, supported by in silico docking modeling. This work identifies new low-cost pharmacological antagonists for AQP1 available to researchers internationally. Furans merit consideration as a new class of therapeutic agents for controlling cancer metastasis.
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Affiliation(s)
- Pak Hin Chow
- Adelaide Medical School, University of Adelaide, Adelaide, Australia (P.H.C., M.K., J.V.P., S.N., A.J.Y.) and College of Science, The Australian National University, Canberra, Australia (J.V.P.)
| | - Mohamad Kourghi
- Adelaide Medical School, University of Adelaide, Adelaide, Australia (P.H.C., M.K., J.V.P., S.N., A.J.Y.) and College of Science, The Australian National University, Canberra, Australia (J.V.P.)
| | - Jinxin V Pei
- Adelaide Medical School, University of Adelaide, Adelaide, Australia (P.H.C., M.K., J.V.P., S.N., A.J.Y.) and College of Science, The Australian National University, Canberra, Australia (J.V.P.)
| | - Saeed Nourmohammadi
- Adelaide Medical School, University of Adelaide, Adelaide, Australia (P.H.C., M.K., J.V.P., S.N., A.J.Y.) and College of Science, The Australian National University, Canberra, Australia (J.V.P.)
| | - Andrea J Yool
- Adelaide Medical School, University of Adelaide, Adelaide, Australia (P.H.C., M.K., J.V.P., S.N., A.J.Y.) and College of Science, The Australian National University, Canberra, Australia (J.V.P.)
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Singh RK, Deshmukh R, Muthamilarasan M, Rani R, Prasad M. Versatile roles of aquaporin in physiological processes and stress tolerance in plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 149:178-189. [PMID: 32078896 DOI: 10.1016/j.plaphy.2020.02.009] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 02/11/2020] [Accepted: 02/11/2020] [Indexed: 05/21/2023]
Abstract
Aquaporins are pore-forming transmembrane proteins that facilitate the movement of water and many other small neutral solutes across the cells and intracellular compartments. Plants exhibits high diversity in aquaporin isoforms and broadly classified into five different subfamilies on the basis of phylogenetic distribution and subcellular occurrence: plasma membrane intrinsic proteins (PIPs), tonoplast intrinsic proteins (TIPs), nodulin 26-like proteins (NIPs), small basic intrinsic proteins (SIPs) and uncharacterized intrinsic proteins (XIPs). The gating mechanism of aquaporin channels is tightly regulated by post-translational modifications such as phosphorylation, methylation, acetylation, glycosylation, and deamination. Aquaporin expression and transport functions are also modulated by the various phytohormones-mediated signalling in plants. Combined physiology and transcriptome analysis revealed the role of aquaporins in regulating hydraulic conductance in roots and leaves. The present review mainly focused on aquaporin functional activity during solute transport, plant development, abiotic stress response, and plant-microbe symbiosis. Genetically modified plants overexpressing aquaporin-encoding genes display improved agronomic and abiotic stress tolerance.
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Affiliation(s)
- Roshan Kumar Singh
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Rupesh Deshmukh
- National Agri-Food Biotechnology Institute, Mohali, 140306, Chandigarh, India
| | | | - Rekha Rani
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Manoj Prasad
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India.
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Hosoi K, Yao C, Hasegawa T, Yoshimura H, Akamatsu T. Dynamics of Salivary Gland AQP5 under Normal and Pathologic Conditions. Int J Mol Sci 2020; 21:ijms21041182. [PMID: 32053992 PMCID: PMC7072788 DOI: 10.3390/ijms21041182] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/04/2020] [Accepted: 02/07/2020] [Indexed: 12/13/2022] Open
Abstract
AQP5 plays an important role in the salivary gland function. The mRNA and protein for aquaporin 5 (AQP5) are expressed in the acini from embryonic days E13-16 and E17-18, respectively and for entire postnatal days. Ligation-reopening of main excretory duct induces changes in the AQP5 level which would give an insight for mechanism of regeneration/self-duplication of acinar cells. The AQP5 level in the submandibular gland (SMG) decreases by chorda tympani denervation (CTD) via activation autophagosome, suggesting that its level in the SMG under normal condition is maintained by parasympathetic nerve. Isoproterenol (IPR), a β-adrenergic agonist, raised the levels of membrane AQP5 protein and its mRNA in the parotid gland (PG), suggesting coupling of the AQP5 dynamic and amylase secretion-restoration cycle. In the PG, lipopolysaccharide (LPS) is shown to activate mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-κB) signalings and potentially downregulate AQP5 expression via cross coupling of activator protein-1 (AP-1) and NF-κB. In most species, Ser-156 and Thr-259 of AQP5 are experimentally phosphorylated, which is enhanced by cAMP analogues and forskolin. cAMP-dependent phosphorylation of AQP5 does not seem to be markedly involved in regulation of its intracellular trafficking but seems to play a role in its constitutive expression and lateral diffusion in the cell membrane. Additionally, Ser-156 phosphorylation may be important for cancer development.
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Affiliation(s)
- Kazuo Hosoi
- Department of Molecular Oral Physiology, Division of Oral Science, Graduate School of Biomedical Sciences, Tokushima University, Tokushima-shi, Tokushima 770-8504, Japan; (C.Y.); (T.H.); (T.A.)
- Kosei Pharmaceutical Co., Ltd., Osaka-shi, Osaka 540–0039, Japan
- Correspondence: (K.H.); (H.Y.)
| | - Chenjuan Yao
- Department of Molecular Oral Physiology, Division of Oral Science, Graduate School of Biomedical Sciences, Tokushima University, Tokushima-shi, Tokushima 770-8504, Japan; (C.Y.); (T.H.); (T.A.)
| | - Takahiro Hasegawa
- Department of Molecular Oral Physiology, Division of Oral Science, Graduate School of Biomedical Sciences, Tokushima University, Tokushima-shi, Tokushima 770-8504, Japan; (C.Y.); (T.H.); (T.A.)
| | - Hiroshi Yoshimura
- Department of Molecular Oral Physiology, Division of Oral Science, Graduate School of Biomedical Sciences, Tokushima University, Tokushima-shi, Tokushima 770-8504, Japan; (C.Y.); (T.H.); (T.A.)
- Correspondence: (K.H.); (H.Y.)
| | - Tetsuya Akamatsu
- Department of Molecular Oral Physiology, Division of Oral Science, Graduate School of Biomedical Sciences, Tokushima University, Tokushima-shi, Tokushima 770-8504, Japan; (C.Y.); (T.H.); (T.A.)
- Field of Biomolecular Functions and Technology, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima-shi, Tokushima 770-8513, Japan
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Kromdijk J, Głowacka K, Long SP. Photosynthetic efficiency and mesophyll conductance are unaffected in Arabidopsis thaliana aquaporin knock-out lines. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:318-329. [PMID: 31731291 DOI: 10.1093/jxb/erz442] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 10/06/2019] [Indexed: 05/12/2023]
Abstract
Improving photosynthetic efficiency is widely regarded as a major route to achieving much-needed yield gains in crop plants. In plants with C3 photosynthesis, increasing the diffusion conductance for CO2 transfer from substomatal cavity to chloroplast stroma (gm) could help to improve the efficiencies of CO2 assimilation and photosynthetic water use in parallel. The diffusion pathway from substomatal cavity to chloroplast traverses cell wall, plasma membrane, cytosol, chloroplast envelope membranes, and chloroplast stroma. Specific membrane intrinsic proteins of the aquaporin family can facilitate CO2 diffusion across membranes. Some of these aquaporins, such as PIP1;2 in Arabidopsis thaliana, have been suggested to exert control over gm and the magnitude of the CO2 assimilation flux, but the evidence for a direct physiological role of aquaporins in determining gm is limited. Here, we estimated gm with four different methods under a range of light intensities and CO2 concentrations in two previously characterized pip1;2 knock-out lines as well as pip1;3 and pip2;6 knock-out lines, which have not been previously evaluated for a role in gm. This study presents the most in-depth analysis of gm in Arabidopsis aquaporin knock-out mutants to date. Surprisingly, all methods failed to show any significant differences between the pip1;2, pip1;3, or pip2;6 mutants and the Col-0 control.
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Affiliation(s)
- Johannes Kromdijk
- Department of Plant Sciences, University of Cambridge, Downing street, Cambridge, UK
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Katarzyna Głowacka
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
- Department of Biochemistry, University of Nebraska-Lincoln, N246 Beadle Center, Lincoln, NE, USA
| | - Stephen P Long
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Lancaster Environment Centre, University of Lancaster, Lancaster, UK
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Chen P, Chen J, Sun M, Yan H, Feng G, Wu B, Zhang X, Wang X, Huang L. Comparative transcriptome study of switchgrass ( Panicum virgatum L.) homologous autopolyploid and its parental amphidiploid responding to consistent drought stress. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:170. [PMID: 33072185 PMCID: PMC7559793 DOI: 10.1186/s13068-020-01810-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 10/06/2020] [Indexed: 05/09/2023]
Abstract
BACKGROUND Newly formed polyploids may experience short-term adaptative changes in their genome that may enhance the resistance of plants to stress. Considering the increasingly serious effects of drought on biofuel plants, whole genome duplication (WGD) may be an efficient way to proceed with drought resistant breeding. However, the molecular mechanism of drought response before/after WGD remains largely unclear. RESULT We found that autoploid switchgrass (Panicum virgatum L.) 8X Alamo had higher drought tolerance than its parent amphidiploid 4X Alamo using physiological tests. RNA and microRNA sequencing at different time points during drought were then conducted on 8X Alamo and 4X Alamo switchgrass. The specific differentially expressed transcripts (DETs) that related to drought stress (DS) in 8X Alamo were enriched in ribonucleoside and ribonucleotide binding, while the drought-related DETs in 4X Alamo were enriched in structural molecule activity. Ploidy-related DETs were primarily associated with signal transduction mechanisms. Weighted gene co-expression network analysis (WGCNA) detected three significant DS-related modules, and their DETs were primarily enriched in biosynthesis process and photosynthesis. A total of 26 differentially expressed microRNAs (DEmiRs) were detected, and among them, sbi-microRNA 399b was only expressed in 8X Alamo. The targets of microRNAs that were responded to polyploidization and drought stress all contained cytochrome P450 and superoxide dismutase genes. CONCLUSIONS This study explored the drought response of 8X and 4X Alamo switchgrass on both physiological and transcriptional levels, and provided experimental and sequencing data basis for a short-term adaptability study and drought-resistant biofuel plant breeding.
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Affiliation(s)
- Peilin Chen
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
- Institute for Biology, Plant Cell and Molecular Biology, Humboldt-Universität zu Berlin, 10115 Berlin, Germany
| | - Jing Chen
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
| | - Min Sun
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
| | - Haidong Yan
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
- Department of Horticulture, Virginia Tech, Blacksburg, VA 24061 USA
| | - Guangyan Feng
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
| | - Bingchao Wu
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
| | - Xinquan Zhang
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
| | - Xiaoshan Wang
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
| | - Linkai Huang
- Department of Grassland Science, Animal Science and Technology College, Sichuan Agricultural University, Chengdu, 611130 China
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Vorob'ev VN, Sibgatullin TA, Sterkhova KA, Alexandrov EA, Gogolev YV, Timofeeva OA, Gorshkov VY, Chevela VV. Ytterbium increases transmembrane water transport in Zea mays roots via aquaporin modulation. Biometals 2019; 32:901-908. [PMID: 31587124 DOI: 10.1007/s10534-019-00221-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 09/28/2019] [Indexed: 11/28/2022]
Abstract
In our study, the rare earth element ytterbium (Yb3+) was demonstrated to affect water exchange in roots of Zea mays seedlings. Herewith, the overall membrane permeability (Pd) increased. The Pd increase was determined by aquaporin activity but not the membrane lipid component since the closure of aquaporin channels due to low intracellular pH abolished the positive effect of Yb3+ on Pd. Additionally, the expression level of aquaporin genes ZmPIP2;2, ZmPIP2;6 and ZmTIP2;2 was increased when plants were grown in the presence of Yb3+. Our results indicate that previously described positive influence of rare earth metals on plant growth and productivity may be mediated (at least partially) by the modification of the plant hydraulic system.
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Affiliation(s)
- Vladimir N Vorob'ev
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of Russian Academy of Sciences, P.O. Box 30, Lobachevsky st., 2/13, Kazan, Russia, 420111. .,Kazan (Volga region) Federal University, Kremlyovskaya st., 18, 420008, Kazan, Russia.
| | - Timur A Sibgatullin
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of Russian Academy of Sciences, P.O. Box 30, Lobachevsky st., 2/13, Kazan, Russia, 420111
| | - Kseniya A Sterkhova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of Russian Academy of Sciences, P.O. Box 30, Lobachevsky st., 2/13, Kazan, Russia, 420111
| | - Evgeniy A Alexandrov
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of Russian Academy of Sciences, P.O. Box 30, Lobachevsky st., 2/13, Kazan, Russia, 420111
| | - Yuri V Gogolev
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of Russian Academy of Sciences, P.O. Box 30, Lobachevsky st., 2/13, Kazan, Russia, 420111.,Kazan (Volga region) Federal University, Kremlyovskaya st., 18, 420008, Kazan, Russia
| | - Olga A Timofeeva
- Kazan (Volga region) Federal University, Kremlyovskaya st., 18, 420008, Kazan, Russia
| | - Vladimir Y Gorshkov
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of Russian Academy of Sciences, P.O. Box 30, Lobachevsky st., 2/13, Kazan, Russia, 420111.,Kazan (Volga region) Federal University, Kremlyovskaya st., 18, 420008, Kazan, Russia
| | - Vladimir V Chevela
- Kazan (Volga region) Federal University, Kremlyovskaya st., 18, 420008, Kazan, Russia
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122
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Chuang YH, Liu CH, Sallach JB, Hammerschmidt R, Zhang W, Boyd SA, Li H. Mechanistic study on uptake and transport of pharmaceuticals in lettuce from water. ENVIRONMENT INTERNATIONAL 2019; 131:104976. [PMID: 31336255 DOI: 10.1016/j.envint.2019.104976] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/05/2019] [Accepted: 06/27/2019] [Indexed: 05/12/2023]
Abstract
The dissemination of pharmaceuticals in agroecosystems originating from land application of animal manure/sewage sludge and irrigation with treated wastewater in agricultural production has raised concern about the accumulation of pharmaceuticals in food products. The pathways of pharmaceutical entries via plant roots, transport to upper fractions, and the factors influencing these processes have yet been systematically elucidated, thus impeding the development of effective measures to mitigate pharmaceutical contamination in food crops. In this study, lettuce uptake of thirteen commonly used pharmaceuticals was investigated using a hydroponic experimental setting. Pharmaceutical sorption by lettuce roots was measured in order to evaluate the influence on pharmaceutical transport from roots to shoots. Small-sized pharmaceuticals e.g., caffeine and carbamazepine with molecular weight (MW) <300 g mol-1 and a low affinity to lettuce roots (sorption coefficient Kp < 0.05 L g-1) manifested substantial transport to shoots. Small-sized molecules lamotrigine and trimethoprim had a relatively strong affinity to lettuce roots (Kp > 12.0 L g-1) and demonstrated a reduced transport to shoots. Large-sized pharmaceuticals (e.g. MW >400 g mol-1) including lincomycin, monensin sodium, and tylosin could be excluded from cell membranes, resulting in the predominant accumulation in lettuce roots. Large-sized oxytetracycline existed as zwitterionic species that could slowly enter lettuce roots; however, the relatively strong interaction with lettuce roots limits its transport to shoots. The mass balance analysis revealed that acetaminophen, β-estradiol, carbadox, estrone and triclosan were readily metabolized in lettuce with >90% loss during 144-h exposure period. A scheme was proposed to describe pharmaceutical uptake and transport in plant, which could reasonably elucidate many literature-reported results. Molecular size, reactivity and ionic speciation of pharmaceuticals, as well as plant physiology, collectively determine their uptake, transport and accumulation in plants.
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Affiliation(s)
- Ya-Hui Chuang
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA; Department of Soil and Environmental Sciences, National Chung-Hsing University, Taichung 402, Taiwan
| | - Cheng-Hua Liu
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA; Environmental Science and Policy Program, Michigan State University, East Lansing, MI 48824, USA
| | - J Brett Sallach
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA
| | - Raymond Hammerschmidt
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA
| | - Wei Zhang
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA; Environmental Science and Policy Program, Michigan State University, East Lansing, MI 48824, USA
| | - Stephen A Boyd
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA
| | - Hui Li
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA.
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Bezerra-Neto JP, de Araújo FC, Ferreira-Neto JRC, da Silva MD, Pandolfi V, Aburjaile FF, Sakamoto T, de Oliveira Silva RL, Kido EA, Barbosa Amorim LL, Ortega JM, Benko-Iseppon AM. Plant Aquaporins: Diversity, Evolution and Biotechnological Applications. Curr Protein Pept Sci 2019; 20:368-395. [PMID: 30387391 DOI: 10.2174/1389203720666181102095910] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/24/2018] [Accepted: 10/30/2018] [Indexed: 12/20/2022]
Abstract
The plasma membrane forms a permeable barrier that separates the cytoplasm from the external environment, defining the physical and chemical limits in each cell in all organisms. The movement of molecules and ions into and out of cells is controlled by the plasma membrane as a critical process for cell stability and survival, maintaining essential differences between the composition of the extracellular fluid and the cytosol. In this process aquaporins (AQPs) figure as important actors, comprising highly conserved membrane proteins that carry water, glycerol and other hydrophilic molecules through biomembranes, including the cell wall and membranes of cytoplasmic organelles. While mammals have 15 types of AQPs described so far (displaying 18 paralogs), a single plant species can present more than 120 isoforms, providing transport of different types of solutes. Such aquaporins may be present in the whole plant or can be associated with different tissues or situations, including biotic and especially abiotic stresses, such as drought, salinity or tolerance to soils rich in heavy metals, for instance. The present review addresses several aspects of plant aquaporins, from their structure, classification, and function, to in silico methodologies for their analysis and identification in transcriptomes and genomes. Aspects of evolution and diversification of AQPs (with a focus on plants) are approached for the first time with the aid of the LCA (Last Common Ancestor) analysis. Finally, the main practical applications involving the use of AQPs are discussed, including patents and future perspectives involving this important protein family.
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Affiliation(s)
- João P Bezerra-Neto
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Flávia Czekalski de Araújo
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - José R C Ferreira-Neto
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Manassés D da Silva
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Valesca Pandolfi
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Flavia F Aburjaile
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Tetsu Sakamoto
- Universidade Federal de Minas Gerais, Department of Biochemistry and Immunology, Belo Horizonte, Brazil
| | - Roberta L de Oliveira Silva
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Ederson A Kido
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Lidiane L Barbosa Amorim
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil.,Instituto Federal de Educação, Ciência e Tecnologia do Piauí, Campus Oeiras, Avenida Projetada, s/n, 64.500-000, Oeiras, Piauí, Brazil
| | - José M Ortega
- Universidade Federal de Minas Gerais, Department of Biochemistry and Immunology, Belo Horizonte, Brazil
| | - Ana M Benko-Iseppon
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
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Characterization of aquaporin-driven hydrogen peroxide transport. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1862:183065. [PMID: 31521632 DOI: 10.1016/j.bbamem.2019.183065] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 08/20/2019] [Accepted: 09/10/2019] [Indexed: 12/31/2022]
Abstract
Aquaporins are membrane-intrinsic proteins initially defined as water (H2O) channels in all organisms and subsequently found to have multiple substrate specificities, such as hydrogen peroxide (H2O2). H2O2 is a signaling molecule that partakes in immune responses where its transport is mediated by aquaporins. To shed further light on the molecular basis of the aquaporin function in H2O2 transport, we have characterized an Arabidopsis thaliana aquaporin, AtPIP2;4, recombinantly produced to high yields in Pichia pastoris. Here, we present a newly established assay that allows detection of H2O2 transport by purified aquaporins reconstituted into liposomes, enabling us to compare aquaporin homologues with respect to substrate specificity. To get additional insight into the structural determinants for aquaporin-mediated H2O2 transport, we solved the 3D-structure of AtPIP2;4 to 3.7 Å resolution and found structural identity to the water channel from spinach (SoPIP2;1), with the difference that Cd2+ cation is not required to retain the closed conformation. The transport specificities of the two plant aquaporins were compared to a human homologue, AQP1. Overall, we conclude that AtPIP2;4, SoPIP2;1 and hAQP1 are all transporters of both H2O and H2O2, but have different efficiencies for various specificities. Notably, all three homologues expedite H2O transport equally well while the plant aquaporins are more permeable to H2O2 than hAQP1. Comparison of the structures indicates that the observed variations in H2O and H2O2 transport cannot be explained by differences in the monomeric pore. Possibly, the determinants for transport specificities reside in the flexible domains outside the membrane core of these channels.
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125
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Root water uptake and its pathways across the root: quantification at the cellular scale. Sci Rep 2019; 9:12979. [PMID: 31506538 PMCID: PMC6737181 DOI: 10.1038/s41598-019-49528-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 08/27/2019] [Indexed: 11/09/2022] Open
Abstract
The pathways of water across root tissues and their relative contribution to plant water uptake remain debated. This is mainly due to technical challenges in measuring water flux non-invasively at the cellular scale under realistic conditions. We developed a new method to quantify water fluxes inside roots growing in soils. The method combines spatiotemporal quantification of deuterated water distribution imaged by rapid neutron tomography with an inverse simulation of water transport across root tissues. Using this non-invasive technique, we estimated for the first time the in-situ radial water fluxes [m s−1] in apoplastic and cell-to-cell pathways. The water flux in the apoplast of twelve days-old lupins (Lupinus albus L. cv. Feodora) was seventeen times faster than in the cell-to-cell pathway. Hence, the overall contribution of the apoplast in water flow [m3 s−1] across the cortex is, despite its small volume of 5%, as large as 57 ± 8% (Mean ± SD for n = 3) of the total water flow. This method is suitable to non-invasively measure the response of cellular scale root hydraulics and water fluxes to varying soil and climate conditions.
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126
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Khan MR, Adam V, Rizvi TF, Zhang B, Ahamad F, Jośko I, Zhu Y, Yang M, Mao C. Nanoparticle-Plant Interactions: Two-Way Traffic. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901794. [PMID: 31318142 PMCID: PMC6800249 DOI: 10.1002/smll.201901794] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/24/2019] [Indexed: 05/03/2023]
Abstract
In this Review, an effort is made to discuss the most recent progress and future trend in the two-way traffic of the interactions between plants and nanoparticles (NPs). One way is the use of plants to synthesize NPs in an environmentally benign manner with a focus on the mechanism and optimization of the synthesis. Another way is the effects of synthetic NPs on plant fate with a focus on the transport mechanisms of NPs within plants as well as NP-mediated seed germination and plant development. When NPs are in soil, they can be adsorbed at the root surface, followed by their uptake and inter/intracellular movement in the plant tissues. NPs may also be taken up by foliage under aerial deposition, largely through stomata, trichomes, and cuticles, but the exact mode of NP entry into plants is not well documented. The NP-plant interactions may lead to inhibitory or stimulatory effects on seed germination and plant development, depending on NP compositions, concentrations, and plant species. In numerous cases, radiation-absorbing efficiency, CO2 assimilation capacity, and delay of chloroplast aging have been reported in the plant response to NP treatments, although the mechanisms involved in these processes remain to be studied.
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Affiliation(s)
- Mujeebur Rahman Khan
- Department of Plant Protection, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic
| | - Tanveer Fatima Rizvi
- Department of Plant Protection, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Baohong Zhang
- Department of Biology, East Carolina University, Greenville, NC 27858, U.S.A
| | - Faheem Ahamad
- Department of Plant Protection, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Izabela Jośko
- Institute of Plant Genetics, Breeding and Biotechnology, University of Life Sciences, Akademicka 12, 20-033 Lublin, Poland
| | - Ye Zhu
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, Institute for Biomedical Science, Engineering and Technology, University of Oklahoma, Norman, OK 73019, U.S.A
| | - Mingying Yang
- College of Animal Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Chuanbin Mao
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, Institute for Biomedical Science, Engineering and Technology, University of Oklahoma, Norman, OK 73019, U.S.A
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127
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Wu XN, Chu L, Xi L, Pertl-Obermeyer H, Li Z, Sklodowski K, Sanchez-Rodriguez C, Obermeyer G, Schulze WX. Sucrose-induced Receptor Kinase 1 is Modulated by an Interacting Kinase with Short Extracellular Domain. Mol Cell Proteomics 2019; 18:1556-1571. [PMID: 31147492 PMCID: PMC6683012 DOI: 10.1074/mcp.ra119.001336] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 04/08/2019] [Indexed: 12/22/2022] Open
Abstract
Sucrose as a product of photosynthesis is the major carbohydrate translocated from photosynthetic leaves to growing nonphotosynthetic organs such as roots and seeds. These growing tissues, besides carbohydrate supply, require uptake of water through aquaporins to enhance cell expansion during growth. Previous work revealed Sucrose Induced Receptor Kinase, SIRK1, to control aquaporin activity via phosphorylation in response to external sucrose stimulation. Here, we present the regulatory role of AT3G02880 (QSK1), a receptor kinase with a short external domain, in modulation of SIRK1 activity. Our results suggest that SIRK1 autophosphorylates at Ser-744 after sucrose treatment. Autophosphorylated SIRK1 then interacts with and transphosphorylates QSK1 and QSK2. Upon interaction with QSK1, SIRK1 phosphorylates aquaporins at their regulatory C-terminal phosphorylation sites. Consequently, in root protoplast swelling assays, the qsk1qsk2 mutant showed reduced water influx rates under iso-osmotic sucrose stimulation, confirming an involvement in the same signaling pathway as the receptor kinase SIRK1. Large-scale phosphoproteomics comparing single mutant sirk1, qsk1, and double mutant sirk1 qsk1 revealed that aquaporins were regulated by phosphorylation depending on an activated receptor kinase complex of SIRK1, as well as QSK1. QSK1 thereby acts as a coreceptor stabilizing and enhancing SIRK1 activity and recruiting substrate proteins, such as aquaporins.
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Affiliation(s)
- Xu Na Wu
- ‡Department of Plant Systems Biology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Liangcui Chu
- ‡Department of Plant Systems Biology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Lin Xi
- ‡Department of Plant Systems Biology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Heidi Pertl-Obermeyer
- §Molecular Plant Biophysics and Biochemistry, Department of Biosciences, University of Salzburg, 5020 Salzburg, Austria
| | - Zhi Li
- ‡Department of Plant Systems Biology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Kamil Sklodowski
- ¶Department of Biology, ETH Zürich, Universitätsstrasse 2, 8092 Zürich, Switzerland
| | | | - Gerhard Obermeyer
- §Molecular Plant Biophysics and Biochemistry, Department of Biosciences, University of Salzburg, 5020 Salzburg, Austria
| | - Waltraud X Schulze
- ‡Department of Plant Systems Biology, University of Hohenheim, 70593 Stuttgart, Germany.
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128
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Morris RJ, Blyth M. How water flow, geometry, and material properties drive plant movements. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:3549-3560. [PMID: 31112593 DOI: 10.1093/jxb/erz167] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/08/2019] [Indexed: 06/09/2023]
Abstract
Plants are dynamic. They adjust their shape for feeding, defence, and reproduction. Such plant movements are critical for their survival. We present selected examples covering a range of movements from single cell to tissue level and over a range of time scales. We focus on reversible turgor-driven shape changes. Recent insights into the mechanisms of stomata, bladderwort, the waterwheel, and the Venus flytrap are presented. The underlying physical principles (turgor, osmosis, membrane permeability, wall stress, snap buckling, and elastic instability) are highlighted, and advances in our understanding of these processes are summarized.
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Affiliation(s)
- Richard J Morris
- Computational and Systems Biology, John Innes Centre, Norwich, UK
| | - Mark Blyth
- School of Mathematics, University of East Anglia, Norwich, UK
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129
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Li W, Zhang D, Zhu G, Mi X, Guo W. Combining genome-wide and transcriptome-wide analyses reveal the evolutionary conservation and functional diversity of aquaporins in cotton. BMC Genomics 2019; 20:538. [PMID: 31262248 PMCID: PMC6604486 DOI: 10.1186/s12864-019-5928-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 06/23/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Aquaporins (AQPs) are integral membrane proteins from a larger family of major intrinsic proteins (MIPs) and function in a huge variety of processes such as water transport, plant growth and stress response. The availability of the whole-genome data of different cotton species allows us to study systematic evolution and function of cotton AQPs on a genome-wide level. RESULTS Here, a total of 53, 58, 113 and 111 AQP genes were identified in G. arboreum, G. raimondii, G. hirsutum and G. barbadense, respectively. A comprehensive analysis of cotton AQPs, involved in exon/intron structure, functional domains, phylogenetic relationships and gene duplications, divided these AQPs into five subfamilies (PIP, NIP, SIP, TIP and XIP). Comparative genome analysis among 30 species from algae to angiosperm as well as common tandem duplication events in 24 well-studied plants further revealed the evolutionary conservation of AQP family in the organism kingdom. Combining transcriptome analysis and Quantitative Real-time PCR (qRT-PCR) verification, most AQPs exhibited tissue-specific expression patterns both in G. raimondii and G. hirsutum. Meanwhile, a bias of time to peak expression of several AQPs was also detected after treating G. davidsonii and G. hirsutum with 200 mM NaCl. It is interesting that both PIP1;4 h/i/j and PIP2;2a/e showed the highly conserved tandem structure, but differentially contributed to tissue development and stress response in different cotton species. CONCLUSIONS These results demonstrated that cotton AQPs were structural conservation while experienced the functional differentiation during the process of evolution and domestication. This study will further broaden our insights into the evolution and functional elucidation of AQP gene family in cotton.
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Affiliation(s)
- Weixi Li
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development Ministry of Education, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, People's Republic of China
| | - Dayong Zhang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development Ministry of Education, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, People's Republic of China
| | - Guozhong Zhu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development Ministry of Education, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, People's Republic of China
| | - Xinyue Mi
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development Ministry of Education, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, People's Republic of China
| | - Wangzhen Guo
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development Ministry of Education, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, People's Republic of China.
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130
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Lee SH, Zwiazek JJ. Regulation of water transport in Arabidopsis by methyl jasmonate. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 139:540-547. [PMID: 31029027 DOI: 10.1016/j.plaphy.2019.04.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/19/2019] [Accepted: 04/17/2019] [Indexed: 06/09/2023]
Abstract
Following a stress event, jasmonate-dependent signaling pathway triggers a shift from growth to defense responses that are accompanied by the cessation of growth in many plants. However, the processes leading to this growth inhibition remain obscure. In this study, we provide evidence for a rapid inhibition of cell hydraulic conductivity (Lp) by methyl jasmonate (MeJA) in the roots of wild-type Arabidopsis within 0.5 h of 20 and 50 μM MeJA treatments. We also demonstrate that MeJA did not affect Lp in fad3-2 and fad7-2 Arabidopsis mutants that are deficient in jasmonate precursor, linolenic acid. The reductions of Lp in wild-type plants were accompanied by the down-regulation of several plasma membrane intrinsic protein (PIP) isoforms, and dephosphorylation. Treatments with HgCl2 did not further reduce Lp in the wild-type plants, but significantly reduced Lp in the fad3-2 and fad7-2 that had been first treated with MeJA. Continuous prolonged exposure to exogenous 50 μM MeJA inhibited the relative growth rates (RGR) of shoots and net photosynthesis (Pn) in the Arabidopsis wild-type and fad7-2 plants, but had no effect on the RGR of roots. The results demonstrated that a reduction of aquaporin (AQP)-mediated water transport was the initial target of MeJA exposure, and may contribute to the processes of growth inhibition by MeJA.
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Affiliation(s)
- Seong Hee Lee
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., T6G 2E3, Edmonton, AB, Canada
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., T6G 2E3, Edmonton, AB, Canada.
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131
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Champeyroux C, Bellati J, Barberon M, Rofidal V, Maurel C, Santoni V. Regulation of a plant aquaporin by a Casparian strip membrane domain protein-like. PLANT, CELL & ENVIRONMENT 2019; 42:1788-1801. [PMID: 30767240 DOI: 10.1111/pce.13537] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 02/11/2019] [Indexed: 05/11/2023]
Abstract
The absorption of soil water by roots allows plants to maintain their water status. At the endodermis, water transport can be affected by initial formation of a Casparian strip and further deposition of suberin lamellas and regulated by the function of aquaporins. Four Casparian strip membrane domain protein-like (CASPL; CASPL1B1, CASPL1B2, CASPL1D1, and CASPL1D2) were previously shown to interact with PIP2;1. The present work shows that CASPL1B1, CASPL1B2, and CASPL1D2 are exclusively expressed in suberized endodermal cells, suggesting a cell-specific role in suberization and/or water transport regulation. When compared with wild-type plants, and by contrast to caspl1b1*caspl1b2 double loss of function, caspl1d1*caspl1d2 double mutants showed, in some control or NaCl stress experiments and not upon abscisic acid (ABA) treatment, a weak enlargement of the continuous suberization zone. None of the mutants showed root hydraulic conductivity (Lpr ) phenotype, whether in control, NaCl, or ABA treatment conditions. The data suggest a slight negative role for CASPL1D1 and CASPL1D2 in suberization under control or salt stress conditions, with no major impact on whole root transport functions. At the molecular level, CASPL1B1 was able to physically interact with PIP2;1 and potentially could influence the regulation of aquaporins by acting on their phosphorylated form.
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Affiliation(s)
- Chloé Champeyroux
- BPMP, Univ Montpellier, CNRS, INRA, Montpellier SupAgro, Montpellier, France
| | - Jorge Bellati
- BPMP, Univ Montpellier, CNRS, INRA, Montpellier SupAgro, Montpellier, France
| | - Marie Barberon
- Department of Botany and Plant Biology, Université de Genève, Geneva, Switzerland
| | - Valérie Rofidal
- BPMP, Univ Montpellier, CNRS, INRA, Montpellier SupAgro, Montpellier, France
| | - Christophe Maurel
- BPMP, Univ Montpellier, CNRS, INRA, Montpellier SupAgro, Montpellier, France
| | - Véronique Santoni
- BPMP, Univ Montpellier, CNRS, INRA, Montpellier SupAgro, Montpellier, France
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132
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Zhang L, Chen L, Dong H. Plant Aquaporins in Infection by and Immunity Against Pathogens - A Critical Review. FRONTIERS IN PLANT SCIENCE 2019; 10:632. [PMID: 31191567 PMCID: PMC6546722 DOI: 10.3389/fpls.2019.00632] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 04/26/2019] [Indexed: 05/18/2023]
Abstract
Plant aquaporins (AQPs) of the plasma membrane intrinsic protein (PIP) family face constant risk of hijack by pathogens aiming to infect plants. PIPs can also be involved in plant immunity against infection. This review will utilize two case studies to discuss biochemical and structural mechanisms that govern the functions of PIPs in the regulation of plant infection and immunity. The first example concerns the interaction between rice Oryza sativa and the bacterial blight pathogen Xanthomonas oryzae pv. oryzae (Xoo). To infect rice, Xoo uses the type III (T3) secretion system to secrete the proteic translocator Hpa1, and Hpa1 subsequently mediates the translocation of T3 effectors secreted by this system. Once shifted from bacteria into rice cells, effectors exert virulent or avirulent effects depending on the susceptibility of the rice varieties. The translocator function of Hpa1 requires cooperation with OsPIP1;3, the rice interactor of Hpa1. This role of OsPIP1;3 is related to regulatory models of effector translocation. The regulatory models have been proposed as, translocon-dependent delivery, translocon-independent pore formation, and effector endocytosis with membrane protein/lipid trafficking. The second case study includes the interaction of Hpa1 with the H2O2 transport channel AtPIP1;4, and the associated consequence for H2O2 signal transduction of immunity pathways in Arabidopsis thaliana, a non-host of Xoo. H2O2 is generated in the apoplast upon induction by a pathogen or microbial pattern. H2O2 from this source translocates quickly into Arabidopsis cells, where it interacts with pathways of intracellular immunity to confer plant resistance against diseases. To expedite H2O2 transport, AtPIP1;4 must adopt a specific conformation in a number of ways, including channel width extension through amino acid interactions and selectivity for H2O2 through amino acid protonation and tautomeric reactions. Both topics will reference relevant studies, conducted on other organisms and AQPs, to highlight possible mechanisms of T3 effector translocation currently under debate, and highlight the structural basis of AtPIP1;4 in H2O2 transport facilitated by gating and trafficking regulation.
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Affiliation(s)
- Liyuan Zhang
- Plant Immunity Research Group, National Key Laboratory of Crop Science, Department of Plant Pathology, Shandong Agricultural University, Tai’an, China
| | - Lei Chen
- Plant Immunity Research Group, National Key Laboratory of Crop Science, Department of Plant Pathology, Shandong Agricultural University, Tai’an, China
| | - Hansong Dong
- Plant Immunity Research Group, National Key Laboratory of Crop Science, Department of Plant Pathology, Shandong Agricultural University, Tai’an, China
- Plant Immunity Laboratory, Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
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Canessa Fortuna A, Zerbetto De Palma G, Aliperti Car L, Armentia L, Vitali V, Zeida A, Estrin DA, Alleva K. Gating in plant plasma membrane aquaporins: the involvement of leucine in the formation of a pore constriction in the closed state. FEBS J 2019; 286:3473-3487. [DOI: 10.1111/febs.14922] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/25/2019] [Accepted: 05/08/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Agustina Canessa Fortuna
- Facultad de Farmacia y Bioquímica Instituto de Química y Fisicoquímica Biológica (IQUIFIB) CONICET Universidad de Buenos Aires Argentina
- Departamento de Fisicomatemática Facultad de Farmacia y Bioquímica Universidad de Buenos Aires Argentina
| | - Gerardo Zerbetto De Palma
- Facultad de Farmacia y Bioquímica Instituto de Química y Fisicoquímica Biológica (IQUIFIB) CONICET Universidad de Buenos Aires Argentina
- Departamento de Fisicomatemática Facultad de Farmacia y Bioquímica Universidad de Buenos Aires Argentina
- Instituo de Biotecnología Universidad Nacional de Hurlingham Villa Tesei Argentina
| | - Lucio Aliperti Car
- Laboratorio de Fisiología de Proteínas IQUIBICEN y Facultad de Ciencias Exactas y Naturales CONICET Universidad de Buenos Aires Argentina
| | - Luciano Armentia
- Departamento de Fisicomatemática Facultad de Farmacia y Bioquímica Universidad de Buenos Aires Argentina
| | - Victoria Vitali
- Facultad de Farmacia y Bioquímica Instituto de Química y Fisicoquímica Biológica (IQUIFIB) CONICET Universidad de Buenos Aires Argentina
- Departamento de Fisicomatemática Facultad de Farmacia y Bioquímica Universidad de Buenos Aires Argentina
| | - Ari Zeida
- Departamento de Bioquímica Facultad de Medicina Center for Free Radical and Biomedical Research Universidad de la República Montevideo Uruguay
| | - Darío A. Estrin
- DQIAQF‐INQUIMAE Facultad de Ciencias Exactas y Naturales CONICET Universidad de Buenos Aires Argentina
| | - Karina Alleva
- Facultad de Farmacia y Bioquímica Instituto de Química y Fisicoquímica Biológica (IQUIFIB) CONICET Universidad de Buenos Aires Argentina
- Departamento de Fisicomatemática Facultad de Farmacia y Bioquímica Universidad de Buenos Aires Argentina
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134
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Zou Z, Yang J. Genome-wide comparison reveals divergence of cassava and rubber aquaporin family genes after the recent whole-genome duplication. BMC Genomics 2019; 20:380. [PMID: 31092186 PMCID: PMC6521647 DOI: 10.1186/s12864-019-5780-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 05/07/2019] [Indexed: 12/19/2022] Open
Abstract
Background Aquaporins (AQPs) are a class of integral membrane proteins that facilitate the passive transport of water and other small solutes across biological membranes. Despite their importance, little information is available in cassava (Manihot esculenta), a perennial shrub of the Euphorbiaceae family that serves the sixth major staple crop in the world. Results This study presents a genome-wide analysis of the AQP gene family in cassava. The family of 42 members in this species could be divided into five subfamilies based on phylogenetic analysis, i.e., 14 plasma membrane intrinsic proteins (PIPs), 13 tonoplast intrinsic proteins (TIPs), nine NOD26-like intrinsic proteins (NIPs), four X intrinsic proteins (XIPs), and two small basic intrinsic proteins (SIPs). Best-reciprocal-hit-based sequence comparison and synteny analysis revealed 34 orthologous groups (OGs) present in the Euphorbiaceae ancestor, and nearly one-to-one or two-to-one orthologous relationships were observed between cassava with rubber/physic nut, reflecting the occurrence of one so-called ρ recent whole-genome duplication (WGD) in the last common ancestor of cassava and rubber. In contrast to a predominant role of the ρ WGD on family expansion in rubber, cassava AQP duplicates were derived from the WGD as well as local duplication. Species-specific gene loss was also observed in cassava, which includes the entire NIP4 group and/or six OGs. Comparison of conserved motifs and gene expression profiles revealed divergence of paralogs in cassava as observed in rubber. Conclusions Our findings will not only improve our knowledge on family evolution in Euphorbiaceae, but also provide valuable information for further functional analysis of AQP genes in cassava and rubber. Electronic supplementary material The online version of this article (10.1186/s12864-019-5780-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zhi Zou
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture and Rural Affairs, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, Hainan, People's Republic of China.
| | - Jianghua Yang
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, Hainan, People's Republic of China
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Comparative Analysis of the aquaporin Gene Family in 12 Fish Species. Animals (Basel) 2019; 9:ani9050233. [PMID: 31086002 PMCID: PMC6562760 DOI: 10.3390/ani9050233] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/10/2019] [Accepted: 05/11/2019] [Indexed: 01/15/2023] Open
Abstract
Simple Summary Aquaporins (Aqps) are a group of membrane proteins. In this study, 166 Aqp genes were identified in 12 fish species. Gene organization, motif distribution, recombination, and selection pressure were performed to investigate their evolutionary characteristics. In addition, expression profiles of Aqps were also examined under pathogens infection and organophosphorus pesticide stress. This study will provide a useful reference for further functional study. Abstract Aquaporins (Aqps) are a class of water channel proteins that play key roles in many physiological functions and cellular processes. Here, we analyzed 166 putative Aqp genes in 12 fish species and divided them into four groups. Gene organization and motif distribution analyses suggested potentially conserved functions in each group. Several recombination events were identified in some members, which accelerate their divergence in evolution. Furthermore, a few positive selection sites were identified, and mutations at these sites could alter the stability of Aqp proteins. In addition, expression profiles of some Aqp genes under pathogen infection and organophosphorus pesticide stress were also investigated. The result implied that several Aqp genes may affect different immune responses and osmoregulation. This study provides a comparative analysis of the fish Aqp gene family to facilitate further functional analyses.
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Scharwies JD, Dinneny JR. Water transport, perception, and response in plants. JOURNAL OF PLANT RESEARCH 2019; 132:311-324. [PMID: 30747327 DOI: 10.1007/s10265-019-01089-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 01/16/2019] [Indexed: 05/09/2023]
Abstract
Sufficient water availability in the environment is critical for plant survival. Perception of water by plants is necessary to balance water uptake and water loss and to control plant growth. Plant physiology and soil science research have contributed greatly to our understanding of how water moves through soil, is taken up by roots, and moves to leaves where it is lost to the atmosphere by transpiration. Water uptake from the soil is affected by soil texture itself and soil water content. Hydraulic resistances for water flow through soil can be a major limitation for plant water uptake. Changes in water supply and water loss affect water potential gradients inside plants. Likewise, growth creates water potential gradients. It is known that plants respond to changes in these gradients. Water flow and loss are controlled through stomata and regulation of hydraulic conductance via aquaporins. When water availability declines, water loss is limited through stomatal closure and by adjusting hydraulic conductance to maintain cell turgor. Plants also adapt to changes in water supply by growing their roots towards water and through refinements to their root system architecture. Mechanosensitive ion channels, aquaporins, proteins that sense the cell wall and cell membrane environment, and proteins that change conformation in response to osmotic or turgor changes could serve as putative sensors. Future research is required to better understand processes in the rhizosphere during soil drying and how plants respond to spatial differences in water availability. It remains to be investigated how changes in water availability and water loss affect different tissues and cells in plants and how these biophysical signals are translated into chemical signals that feed into signaling pathways like abscisic acid response or organ development.
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Affiliation(s)
- Johannes Daniel Scharwies
- Department of Plant Biology, Carnegie Institution for Science, 260 Panama Street, Stanford, CA, 94305, USA
- Department of Biology, Stanford University, 371 Serra Mall, Stanford, CA, 94305, USA
| | - José R Dinneny
- Department of Plant Biology, Carnegie Institution for Science, 260 Panama Street, Stanford, CA, 94305, USA.
- Department of Biology, Stanford University, 371 Serra Mall, Stanford, CA, 94305, USA.
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Hajek P, Bader A, Helmstetter F, Henke B, Arnold P, Beitz E. Cell-Free and Yeast-Based Production of the Malarial Lactate Transporter, PfFNT, Delivers Comparable Yield and Protein Quality. Front Pharmacol 2019; 10:375. [PMID: 31024323 PMCID: PMC6467934 DOI: 10.3389/fphar.2019.00375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 03/26/2019] [Indexed: 11/16/2022] Open
Abstract
Cell-free protein production is an attractive alternative to cell-based expression. Rapid results, small-volume reactions, irrelevance of protein toxicity, flexibility, and openness of the system are strong points in favor of the cell-free system. However, the in vitro situation lacks the cellular quality control machinery comprising e.g., the translocon for inserting membrane proteins into lipid bilayers, and chaperon-assisted protein degradation pathways. Here, we compare yield and protein quality of the lactate transporter, PfFNT, from malaria parasites when produced in Pichia pastoris yeast, or in an Escherichia coli S30-extract-based cell-free system. Besides solubilization and correct folding, PfFNT requires oligomerization into homopentamers. We assessed PfFNT folding/oligomerization and function by transmission electron microscopy imaging, transport assays, and binding of small-molecule inhibitors. For the latter, we used chromatography of the PfFNT-inhibitor complex with dual-wavelength detection, and biolayer interferometry. Our data show, that PfFNT possesses an intrinsic capability for assuming the correct fold, oligomerization pattern, and functionality during in vitro translation. This competence depended on the detergent present in the cell-free reaction. The choice of detergent further affected purification and inhibitor binding. In conclusion, in the presence of a suitable detergent, cell-free systems are very well capable of producing high quality membrane proteins.
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Affiliation(s)
- Philipp Hajek
- Department of Pharmaceutical and Medicinal Chemistry, Pharmaceutical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Annika Bader
- Department of Pharmaceutical and Medicinal Chemistry, Pharmaceutical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Folknand Helmstetter
- Department of Pharmaceutical and Medicinal Chemistry, Pharmaceutical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Björn Henke
- Department of Pharmaceutical and Medicinal Chemistry, Pharmaceutical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Philipp Arnold
- Anatomical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Eric Beitz
- Department of Pharmaceutical and Medicinal Chemistry, Pharmaceutical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
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Sharma A, Berntsen P, Harimoorthy R, Appio R, Sjöhamn J, Järvå M, Björling A, Hammarin G, Westenhoff S, Brändén G, Neutze R. A simple adaptation to a protein crystallography station to facilitate difference X-ray scattering studies. J Appl Crystallogr 2019; 52:378-386. [PMID: 30996717 PMCID: PMC6448683 DOI: 10.1107/s1600576719001900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 02/01/2019] [Indexed: 11/10/2022] Open
Abstract
The X-ray crystallography station I911-2 at MAXLab II (Lund, Sweden) has been adapted to enable difference small- and wide-angle X-ray scattering (SAXS/WAXS) data to be recorded. Modifications to the beamline included a customized flow cell, a motorized flow cell holder, a helium cone, a beam stop, a sample stage and a sample delivery system. This setup incorporated external devices such as infrared lasers, LEDs and reaction mixers to induce conformational changes in macromolecules. This platform was evaluated through proof-of-principle experiments capturing light-induced conformational changes in phytochromes. A difference WAXS signature of conformational changes in a plant aqua-porin was also demonstrated using caged calcium.
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Affiliation(s)
- Amit Sharma
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
- Multidisciplinary Centre for Advanced Research and Studies, Jamia Millia Islamia, New Delhi 110025, India
| | - Peter Berntsen
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
- ARC Centre of Exellence in Advanced Molecular Imaging, Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Victoria 3086, Australia
| | - Rajiv Harimoorthy
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
| | | | - Jennie Sjöhamn
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
| | - Michael Järvå
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
| | - Alexander Björling
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
- MAX IV Laboratory, Box 118, 221 00 Lund, Sweden
| | - Greger Hammarin
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
| | - Sebastian Westenhoff
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
| | - Gisela Brändén
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
| | - Richard Neutze
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 40530 Gothenburg, Sweden
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139
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Mizokami Y, Noguchi K, Kojima M, Sakakibara H, Terashima I. Effects of instantaneous and growth CO 2 levels and abscisic acid on stomatal and mesophyll conductances. PLANT, CELL & ENVIRONMENT 2019; 42:1257-1269. [PMID: 30468514 DOI: 10.1111/pce.13484] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 11/08/2018] [Accepted: 11/10/2018] [Indexed: 05/26/2023]
Abstract
C3 photosynthesis is often limited by CO2 diffusivity or stomatal (gs ) and mesophyll (gm ) conductances. To characterize effects of stomatal closure induced by either high CO2 or abscisic acid (ABA) application on gm , we examined gs and gm in the wild type (Col-0) and ost1 and slac1-2 mutants of Arabidopsis thaliana grown at 390 or 780 μmol mol-1 CO2 . Stomata of these mutants were reported to be insensitive to both high CO2 and ABA. When the ambient CO2 increased instantaneously, gm decreased in all these plants, whereas gs in ost1 and slac1-2 was unchanged. Therefore, the decrease in gm in response to high CO2 occurred irrespective of the responses of gs . gm was mainly determined by the instantaneous CO2 concentration during the measurement and not markedly by the CO2 concentration during the growth. Exogenous application of ABA to Col-0 caused the decrease in the intercellular CO2 concentration (Ci ). With the decrease in Ci , gm did not increase but decreased, indicating that the response of gm to CO2 and that to ABA are differently regulated and that ABA content in the leaves plays an important role in the regulation of gm .
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Affiliation(s)
- Yusuke Mizokami
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Ko Noguchi
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Mikiko Kojima
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource Science, Yokohama, Japan
| | - Hitoshi Sakakibara
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource Science, Yokohama, Japan
| | - Ichiro Terashima
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
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Shivaraj SM, Deshmukh R, Sonah H, Bélanger RR. Identification and characterization of aquaporin genes in Arachis duranensis and Arachis ipaensis genomes, the diploid progenitors of peanut. BMC Genomics 2019; 20:222. [PMID: 30885116 PMCID: PMC6423786 DOI: 10.1186/s12864-019-5606-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/13/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Aquaporins (AQPs) facilitate transport of water and small solutes across cell membranes and play an important role in different physiological processes in plants. Despite their importance, limited data is available about AQP distribution and function in the economically important oilseed crop peanut, Arachis hypogea (AABB). The present study reports the identification and structural and expression analysis of the AQPs found in the diploid progenitor genomes of A. hypogea i.e. Arachis duranensis (AA) and Arachis ipaensis (BB). RESULTS Genome-wide analysis revealed the presence of 32 and 36 AQPs in A. duranensis and A. ipaensis, respectively. Phylogenetic analysis showed similar numbers of AQPs clustered in five distinct subfamilies including the plasma membrane intrinsic proteins (PIPs), the tonoplast intrinsic proteins (TIPs), the nodulin 26-like intrinsic proteins (NIPs), the small basic intrinsic proteins (SIPs), and the uncharacterized intrinsic proteins (XIPs). A notable exception was the XIP subfamily where XIP1 group was observed only in A. ipaensis genome. Protein structure evaluation showed a hydrophilic aromatic/arginine (ar/R) selectivity filter (SF) in PIPs whereas other subfamilies mostly contained a hydrophobic ar/R SF. Both genomes contained one NIP2 with a GSGR SF indicating a conserved ability within the genus to uptake silicon. Analysis of RNA-seq data from A. hypogea revealed a similar expression pattern for the different AQP paralogs of AA and BB genomes. The TIP3s showed seed-specific expression while the NIP1s' expression was confined to roots and root nodules. CONCLUSIONS The identification and the phylogenetic analysis of AQPs in both Arachis species revealed the presence of all five sub-families of AQPs. Within the NIP subfamily, the presence of a NIP2 in both genomes supports a conserved ability to absorb Si within plants of the genus. The global expression profile of AQPs in A. hypogea revealed a similar pattern of AQP expression regardless of the subfamilies or the genomes. The tissue-specific expression of AQPs suggests an important role in the development and function of the respective organs. The AQPs identified in the present study will serve as a resource for further characterization and possible exploitation of AQPs to understand their physiological role in A. hypogea.
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Affiliation(s)
- S. M. Shivaraj
- Département de phytologie–Faculté des Sciences de l’agriculture et de l’alimentation, Université Laval, 2425 rue de l’Agriculture, Québec City, QC G1V 0A6 Canada
| | - Rupesh Deshmukh
- National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Humira Sonah
- National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Richard R. Bélanger
- Département de phytologie–Faculté des Sciences de l’agriculture et de l’alimentation, Université Laval, 2425 rue de l’Agriculture, Québec City, QC G1V 0A6 Canada
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Metwally NH, Radwan IT, El-Serwy WS, Mohamed MA. Design, synthesis, DNA assessment and molecular docking study of novel 2-(pyridin-2-ylimino)thiazolidin-4-one derivatives as potent antifungal agents. Bioorg Chem 2019; 84:456-467. [DOI: 10.1016/j.bioorg.2018.11.050] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 11/24/2018] [Accepted: 11/27/2018] [Indexed: 01/07/2023]
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Zhang S, Feng M, Chen W, Zhou X, Lu J, Wang Y, Li Y, Jiang CZ, Gan SS, Ma N, Gao J. In rose, transcription factor PTM balances growth and drought survival via PIP2;1 aquaporin. NATURE PLANTS 2019; 5:290-299. [PMID: 30833710 DOI: 10.1038/s41477-019-0376-1] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 01/25/2019] [Indexed: 05/02/2023]
Abstract
Plants have evolved sophisticated systems in response to environmental changes, and growth arrest is a common strategy used to enhance stress tolerance. Despite the growth-survival trade-off being essential to the shaping of plant productivity, the mechanisms balancing growth and survival remain largely unknown. Aquaporins play a crucial role in growth and stress responses by controlling water transport across membranes. Here, we show that RhPIP2;1, an aquaporin from rose (Rosa sp.), interacts with a membrane-tethered MYB protein, RhPTM. Water deficiency triggers nuclear translocation of the RhPTM C terminus. Silencing of RhPTM causes continuous growth under drought stress and a consequent decrease in survival rate. RNA sequencing (RNA-seq) indicated that RhPTM influences the expression of genes related to carbohydrate metabolism. Water deficiency induces phosphorylation of RhPIP2;1 at Ser 273, which is sufficient to promote nuclear translocation of the RhPTM C terminus. These results indicate that the RhPIP2;1-RhPTM module serves as a key player in orchestrating the trade-off between growth and stress survival in Rosa.
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Affiliation(s)
- Shuai Zhang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Ming Feng
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Wen Chen
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, School of Agriculture and Food Science, Zhejiang Agriculture & Forestry University, Lin'an, China
| | - Xiaofeng Zhou
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Jingyun Lu
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Yaru Wang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Yonghong Li
- School of Applied Chemistry and Biotechnology, Shenzhen Polytechnic, Shenzhen, China
| | - Cai-Zhong Jiang
- Crop Pathology and Genetic Research Unit, United States Department of Agriculture, Agricultural Research Service, Davis, CA, USA
- Department of Plant Sciences, University of California, Davis, CA, USA
| | - Su-Sheng Gan
- Plant Biology Section, School of Integrative Plant Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, USA
| | - Nan Ma
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China.
| | - Junping Gao
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China.
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Stanfield R, Laur J. Aquaporins Respond to Chilling in the Phloem by Altering Protein and mRNA Expression. Cells 2019; 8:E202. [PMID: 30818743 PMCID: PMC6468725 DOI: 10.3390/cells8030202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 02/19/2019] [Accepted: 02/21/2019] [Indexed: 11/17/2022] Open
Abstract
Previous experiments using heat exchangers (liquid cooled blocks) to chill a portion of plant stem have shown a transient stoppage in phloem translocation and an increase in measured phloem pressure. Although a chilled-induced stoppage of phloem transport has been known for over 100 years, the mechanism of this phenomenon is still poorly understood. Recently, work has highlighted that aquaporins occur within the plasma membrane of the sieve tubes along the entire source-to-sink pathway, and that isoforms of these water channel proteins may change dynamically. Aquaporins show regulatory roles in controlling tissue and cellular water status in response to environmental hardships. Thus, we tested if protein localization and mRNA transcript abundance changes occur in response to chilling in balsam poplar (Populus balsamifera) using immunohistochemistry and qrtPCR. The results of the immunolocalization experiments show that the labeling intensity of the sieve elements treated for only 2 min of chill time significantly increased for PIP2. After 10 min of chilling, this signal declined significantly to lower than that of the pre-chilled sieve elements. Overall, the abundance of mRNA transcript increased for the tested PIP2s following cold application. We discuss the implication that aquaporins are responsible for the alleviation of sieve tube pressure and the resumption of flow following a cold-induced blockage event.
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Affiliation(s)
- Ryan Stanfield
- Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2R3, Canada.
| | - Joan Laur
- Institut de Recherche en Biologie Végétale, Université de Montréal, Montréal, QC H3T 1J4, Canada.
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Aikman B, de Almeida A, Meier-Menches SM, Casini A. Aquaporins in cancer development: opportunities for bioinorganic chemistry to contribute novel chemical probes and therapeutic agents. Metallomics 2019; 10:696-712. [PMID: 29766198 DOI: 10.1039/c8mt00072g] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Aquaporins (AQPs) are membrane proteins allowing permeation of water, glycerol & hydrogen peroxide across biomembranes, and playing an important role in water homeostasis in different organs, exocrine gland secretion, urine concentration, skin moisturization, fat metabolism and neural signal transduction. Notably, a large number of studies showed that AQPs are closely associated with cancer biological functions and expressed in more than 20 human cancer cell types. Furthermore, AQP expression is positively correlated with tumour types, grades, proliferation, migration, angiogenesis, as well as tumour-associated oedema, rendering these membrane channels attractive as both diagnostic and therapeutic targets in cancer. Recent developments in the field of AQPs modulation have identified coordination metal-based complexes as potent and selective inhibitors of aquaglyceroporins, opening new avenues in the application of inorganic compounds in medicine and chemical biology. The present review is aimed at providing an overview on AQP structure and function, mainly in relation to cancer. In this context, the exploration of coordination metal compounds as possible inhibitors of aquaporins may open the way to novel chemical approaches to study AQP roles in tumour growth and potentially to new drug families. Thus, we describe recent results in the field and reflect upon the potential of inorganic chemistry in providing compounds to modulate the activity of "elusive" membrane targets as the aquaporins.
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Affiliation(s)
- Brech Aikman
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK.
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145
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Tan X, Zwiazek JJ. Stable expression of aquaporins and hypoxia-responsive genes in adventitious roots are linked to maintaining hydraulic conductance in tobacco (Nicotiana tabacum) exposed to root hypoxia. PLoS One 2019; 14:e0212059. [PMID: 30730995 PMCID: PMC6366753 DOI: 10.1371/journal.pone.0212059] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/26/2019] [Indexed: 11/22/2022] Open
Abstract
Formation of adventitious roots in plants is a common response to hypoxia caused by flooding. In tobacco, after one week of root hypoxia treatment, plants produced twice as many adventitious roots as the aerated plants, but their maximum length was reduced. Hypoxia severely reduced net photosynthesis, transpiration rates, and photosynthetic light responses. Relative transcript abundance of the examined aquaporins in lateral roots was reduced by hypoxia, but in adventitious roots it remained unchanged. This apparent lack of an effect of root hypoxia on the aquaporin expression likely contributed to maintenance of high hydraulic conductance in adventitious roots. Lateral roots had lower porosity compared with adventitious roots and the expression of the ACS (1-aminocyclopropane-1-carboxylate synthase) gene was induced in hypoxic lateral roots, but not in adventitious roots, providing additional evidence that lateral roots were more affected by hypoxia compared with adventitious roots. ATP concentrations were markedly lower in both hypoxic lateral and adventitious roots compared with aerated roots, while the expression of fermentation-related genes, ADH1 (alcohol dehydrogenase 1) and PDC1 (pyruvate decarboxylase 1), was higher in lateral roots compared with adventitious roots. Since root porosity was greater in adventitious compared with lateral roots, the results suggest that the improved O2 delivery and stable root aquaporin expression in adventitious roots were likely the key factors helping flooded tobacco plants maintain high rates of root hydraulic conductance and, consequently, shoot gas exchange.
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Affiliation(s)
- Xiangfeng Tan
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada
| | - Janusz J. Zwiazek
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada
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146
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Nesverova V, Törnroth-Horsefield S. Phosphorylation-Dependent Regulation of Mammalian Aquaporins. Cells 2019; 8:cells8020082. [PMID: 30678081 PMCID: PMC6406877 DOI: 10.3390/cells8020082] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/17/2019] [Accepted: 01/21/2019] [Indexed: 12/26/2022] Open
Abstract
Water homeostasis is fundamental for cell survival. Transport of water across cellular membranes is governed by aquaporins—tetrameric integral membrane channels that are highly conserved throughout the prokaryotic and eukaryotic kingdoms. In eukaryotes, specific regulation of these channels is required and is most commonly carried out by shuttling the protein between cellular compartments (trafficking) or by opening and closing the channel (gating). Structural and functional studies have revealed phosphorylation as a ubiquitous mechanism in aquaporin regulation by both regulatory processes. In this review we summarize what is currently known about the phosphorylation-dependent regulation of mammalian aquaporins. Focusing on the water-specific aquaporins (AQP0–AQP5), we discuss how gating and trafficking are controlled by phosphorylation and how phosphorylation affects the binding of aquaporins to regulatory proteins, thereby highlighting structural details and dissecting the contribution of individual phosphorylated residues when possible. Our aim is to provide an overview of the mechanisms behind how aquaporin phosphorylation controls cellular water balance and to identify key areas where further studies are needed.
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Affiliation(s)
- Veronika Nesverova
- Department of Biochemistry and Structural Biology, Center for Molecular Protein Science, Lund University, Box 124, 221 00 Lund, Sweden.
| | - Susanna Törnroth-Horsefield
- Department of Biochemistry and Structural Biology, Center for Molecular Protein Science, Lund University, Box 124, 221 00 Lund, Sweden.
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147
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Xu F, Wang K, Yuan W, Xu W, Liu S, Kronzucker HJ, Chen G, Miao R, Zhang M, Ding M, Xiao L, Kai L, Zhang J, Zhu Y. Overexpression of rice aquaporin OsPIP1;2 improves yield by enhancing mesophyll CO2 conductance and phloem sucrose transport. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:671-681. [PMID: 30535321 PMCID: PMC6322580 DOI: 10.1093/jxb/ery386] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 11/13/2018] [Indexed: 05/19/2023]
Abstract
Aquaporins are involved in CO2 transport from the leaf intercellular air space to the chloroplast, which contributes to CO2 assimilation. However, the mechanism of CO2 transport by rice (Oryza sativa L.) aquaporins is unknown. Here, we investigated the function of the aquaporin OsPIP1;2 in CO2 diffusion-associated photosynthesis and phloem sucrose transport. Moreover, the grain yield of rice lines overexpressing OsPIP1;2 was determined. OsPIP1;2 was localized to the plasma membrane and the relative expression of OsPIP1;2 was approximately 5-fold higher in leaves in the presence of an elevated CO2 concentration. Overexpression of OsPIP1;2 increased mesophyll conductance by approximately 150% compared with wild-type (WT) rice. The OsPIP1;2-overexpressing lines had higher biomass than the WT, possibly due to increased phloem sucrose transport. In addition, the grain yield of OsPIP1;2-overexpressing lines was approximately 25% higher than that of the WT in three-season field experiments, due to the increased numbers of effective tillers and spikelets per panicle. Our results suggest that OsPIP1;2 modulates rice growth and grain yield by facilitating leaf CO2 diffusion, which increases both the net CO2 assimilation rate and sucrose transport.
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Affiliation(s)
- Feiyun Xu
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences and Joint International Research Laboratory of Water and Nutrient in Crops, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ke Wang
- College of Life Sciences and Joint International Research Laboratory of Water and Nutrient in Crops, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Wei Yuan
- College of Life Sciences and Joint International Research Laboratory of Water and Nutrient in Crops, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Weifeng Xu
- College of Life Sciences and Joint International Research Laboratory of Water and Nutrient in Crops, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Shuang Liu
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
| | - Herbert J Kronzucker
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, VIC, Australia
| | - Guanglei Chen
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
| | - Rui Miao
- College of Life Sciences and Joint International Research Laboratory of Water and Nutrient in Crops, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Maoxing Zhang
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
| | - Ming Ding
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
| | - Liang Xiao
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
| | - Lei Kai
- The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, China
| | - Jianhua Zhang
- Department of Biology, Hong Kong Baptist University, and the State Key Laboratory of Agrobiotechnology, Chinese University of Hong Kong, Hong Kong, China
| | - Yiyong Zhu
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
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148
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Khan S, Thomas BR, de la Mata R, Randall MJ, Zhang W, Zwiazek JJ. Variation in Aquaporin and Physiological Responses Among Pinus contorta Families Under Different Moisture Conditions. PLANTS 2019; 8:plants8010013. [PMID: 30621354 PMCID: PMC6359517 DOI: 10.3390/plants8010013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 12/22/2018] [Accepted: 12/31/2018] [Indexed: 01/05/2023]
Abstract
A population of eight open pollinated families of Pinus contorta was selected from sites varying in precipitation regimes and elevation to examine the possible role of aquaporins in adaptation to different moisture conditions. Five Pinus contorta aquaporins encoding PiconPIP2;1, PiconPIP2;2, PiconPIP2;3, PiconPIP1;2, and PiconTIP1;1 were cloned and detailed structural analyses were conducted to provide essential information that can explain their biological and molecular function. All five PiconAQPs contained hydrophilic aromatic/arginine selective filters to facilitate the transport of water. Transcript abundance patterns of PiconAQPs varied significantly across the P. contorta families under varying soil moisture conditions. The transcript abundance of five PiconPIPs remained unchanged under control and water-stress conditions in two families that originated from the sites with lower precipitation levels. These two families also displayed a different adaptive strategy of photosynthesis to cope with drought stress, which was manifested by reduced sensitivity in photosynthesis (maintaining the same rate) while exhibiting a reduction in stomatal conductance. In general, root:shoot ratios were not affected by drought stress, but some variation was observed between families. The results showed variability in drought coping mechanisms, including the expression of aquaporin genes and plant biomass allocation among eight families of Pinus contorta.
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Affiliation(s)
- Shanjida Khan
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB T6G 2E3, Canada.
| | - Barb R Thomas
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB T6G 2E3, Canada.
| | - Raul de la Mata
- Institut de Recerca i Tecnología Agroalimentàries (IRTA), Torre Marimon, 08140 Caldes de Montbui, Spain.
| | - Morgan J Randall
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB T6G 2E3, Canada.
| | - Wenqing Zhang
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB T6G 2E3, Canada.
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB T6G 2E3, Canada.
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149
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Vitali V, Jozefkowicz C, Canessa Fortuna A, Soto G, González Flecha FL, Alleva K. Cooperativity in proton sensing by PIP aquaporins. FEBS J 2018; 286:991-1002. [PMID: 30430736 DOI: 10.1111/febs.14701] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Revised: 11/05/2018] [Accepted: 11/13/2018] [Indexed: 11/28/2022]
Abstract
One of the most intriguing properties of plasma membrane intrinsic protein (PIP) aquaporins (AQPs) is their ability to modulate water transport by sensing different levels of intracellular pH through the assembly of homo- and heterotetrameric molecular species in the plasma membrane. In this work, using a phenomenological modeling approach, we demonstrate that cooperativity in PIP biological response cannot be directly attributed to a cooperative proton binding, as it is usually considered, since it could also be the consequence of a cooperative conformation transition between open and closed states of the channel. Moreover, our results show that, when mixed populations of homo- and heterotetrameric PIP channels are coexpressed in the plasma membrane of the same cell, the observed decrease in the degree of positive cooperativity would result from the simultaneous presence of molecular species with different levels of proton sensing. Indeed, the random mixing between different PIP paralogues as subunits in a single tetramer, plus the possibility of mixed populations of homo- and heterotetrameric PIP channels widen the spectrum of cooperative responses of a cell membrane. Our approach offers a deep understanding of cooperative transport of AQP channels, as members of a multiprotein family where the relevant proton binding sites of each member have not been clearly elucidated yet.
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Affiliation(s)
- Victoria Vitali
- Universidad de Buenos Aires, CONICET, Facultad de Farmacia y Bioquímica, Instituto de Química y Fisicoquímica Biológica (IQUIFIB), Argentina.,Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Fisicomatemática, Argentina
| | - Cintia Jozefkowicz
- Instituto Nacional de Tecnología Agropecuaria, INTA, Castelar, Argentina.,CONICET, Buenos Aires, Argentina
| | - Agustina Canessa Fortuna
- Universidad de Buenos Aires, CONICET, Facultad de Farmacia y Bioquímica, Instituto de Química y Fisicoquímica Biológica (IQUIFIB), Argentina.,Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Fisicomatemática, Argentina
| | - Gabriela Soto
- Instituto Nacional de Tecnología Agropecuaria, INTA, Castelar, Argentina.,CONICET, Buenos Aires, Argentina
| | - F Luis González Flecha
- Universidad de Buenos Aires, CONICET, Facultad de Farmacia y Bioquímica, Instituto de Química y Fisicoquímica Biológica (IQUIFIB), Argentina
| | - Karina Alleva
- Universidad de Buenos Aires, CONICET, Facultad de Farmacia y Bioquímica, Instituto de Química y Fisicoquímica Biológica (IQUIFIB), Argentina.,Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Fisicomatemática, Argentina
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150
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Hrmova M, Gilliham M. Plants fighting back: to transport or not to transport, this is a structural question. CURRENT OPINION IN PLANT BIOLOGY 2018; 46:68-76. [PMID: 30138844 DOI: 10.1016/j.pbi.2018.07.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/06/2018] [Accepted: 07/12/2018] [Indexed: 06/08/2023]
Abstract
Membrane-embedded transport proteins are fundamental to life; their co-ordinated action controls the movement and distribution of solutes into, around and out of cells for signalling, metabolism, nutrition, stress tolerance and development. Here we outline two case studies of transport systems that plants use to tolerate soil elemental toxicity, demonstrating how iterative studies of protein structure and function result in unparalleled insights into transport mechanics. Further, we propose that integrative platforms of biological, biochemical and biophysical tools can provide quantitative data on substrate specificity and transport rates, which are important in understanding transporter evolution and their roles in cell biology and whole plant physiology. Such knowledge equips biotechnologists and breeders with the power to deliver improvements in crop yields in sub-optimal soils.
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Affiliation(s)
- Maria Hrmova
- School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Glen Osmond, South Australia 5064, Australia; School of Life Sciences, Huaiyin Normal University, Huai'an 223300, China.
| | - Matthew Gilliham
- School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Glen Osmond, South Australia 5064, Australia; Australian Research Council Centre of Excellence in Plant Energy Biology, University of Adelaide, Waite Research Institute, Glen Osmond, South Australia 5064, Australia
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