1
|
Roy Choudhury D, Maurya A, Singh NK, Singh GP, Singh R. Discovering New QTNs and Candidate Genes Associated with Rice-Grain-Related Traits within a Collection of Northeast Core Set and Rice Landraces. PLANTS (BASEL, SWITZERLAND) 2024; 13:1707. [PMID: 38931139 PMCID: PMC11207502 DOI: 10.3390/plants13121707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 06/05/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024]
Abstract
Grain-related traits are pivotal in rice cultivation, influencing yield and consumer preference. The complex inheritance of these traits, involving multiple alleles contributing to their expression, poses challenges in breeding. To address these challenges, a multi-locus genome-wide association study (ML-GWAS) utilizing 35,286 high-quality single-nucleotide polymorphisms (SNPs) was conducted. Our study utilized an association panel comprising 483 rice genotypes sourced from a northeast core set and a landraces set collected from various regions in India. Forty quantitative trait nucleotides (QTNs) were identified, associated with four grain-related traits: grain length (GL), grain width (GW), grain aroma (Aro), and length-width ratio (LWR). Notably, 16 QTNs were simultaneously identified using two ML-GWAS methods, distributed across multiple chromosomes. Nearly 258 genes were found near the 16 significant QTNs. Gene annotation study revealed that sixty of these genes exhibited elevated expression levels in specific tissues and were implicated in pathways influencing grain quality. Gene ontology (GO), trait ontology (TO), and enrichment analysis pinpointed 60 candidate genes (CGs) enriched in relevant GO terms. Among them, LOC_Os05g06470, LOC_Os06g06080, LOC_Os08g43470, and LOC_Os03g53110 were confirmed as key contributors to GL, GW, Aro, and LWR. Insights from QTNs and CGs illuminate rice trait regulation and genetic connections, offering potential targets for future studies.
Collapse
Affiliation(s)
- Debjani Roy Choudhury
- Division of Genomic Resources, ICAR—National Bureau of Plant Genetic Resources, New Delhi 110012, India; (D.R.C.); (A.M.)
| | - Avantika Maurya
- Division of Genomic Resources, ICAR—National Bureau of Plant Genetic Resources, New Delhi 110012, India; (D.R.C.); (A.M.)
| | | | | | - Rakesh Singh
- Division of Genomic Resources, ICAR—National Bureau of Plant Genetic Resources, New Delhi 110012, India; (D.R.C.); (A.M.)
| |
Collapse
|
2
|
Roychowdhury A, Srivastava R, Akash, Shukla G, Zehirov G, Mishev K, Kumar R. Metabolic footprints in phosphate-starved plants. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2023; 29:755-767. [PMID: 37363416 PMCID: PMC10284745 DOI: 10.1007/s12298-023-01319-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/28/2023]
Abstract
Plants' requirement of Phosphorus (P) as an essential macronutrient is obligatory for their normal growth and metabolism. Besides restricting plants' primary growth, P depletion affects both primary and secondary metabolism and leads to altered levels of sugars, metabolites, amino acids, and other secondary compounds. Such metabolic shifts help plants optimize their metabolism and growth under P limited conditions. Under P deprivation, both sugar levels and their mobilization change that influences the expression of Pi starvation-inducible genes. Increased sugar repartitioning from shoot to root help root growth and organic acids secretion that in turn promotes phosphate (Pi) uptake from the soil. Other metabolic changes such as lipid remodeling or P reallocation from older to younger leaves release the P from its bound forms in the cell. In this review, we summarize the metabolic footprinting of Pi-starved plants with respect to the benefits offered by such metabolic changes to intracellular Pi homeostasis.
Collapse
Affiliation(s)
- Abhishek Roychowdhury
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana 500046 India
| | - Rajat Srivastava
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana 500046 India
| | - Akash
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana 500046 India
| | - Gyanesh Shukla
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana 500046 India
| | - Grigor Zehirov
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Kiril Mishev
- Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Rahul Kumar
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana 500046 India
| |
Collapse
|
3
|
Wang Z, Kuo HF, Chiou TJ. Intracellular phosphate sensing and regulation of phosphate transport systems in plants. PLANT PHYSIOLOGY 2021; 187:2043-2055. [PMID: 35235674 PMCID: PMC8644344 DOI: 10.1093/plphys/kiab343] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 06/29/2021] [Indexed: 05/04/2023]
Abstract
Recent research on the regulation of cellular phosphate (Pi) homeostasis in eukaryotes has collectively made substantial advances in elucidating inositol pyrophosphates (PP-InsP) as Pi signaling molecules that are perceived by the SPX (Syg1, Pho81, and Xpr1) domains residing in multiple proteins involved in Pi transport and signaling. The PP-InsP-SPX signaling module is evolutionarily conserved across eukaryotes and has been elaborately adopted in plant Pi transport and signaling systems. In this review, we have integrated these advances with prior established knowledge of Pi and PP-InsP metabolism, intracellular Pi sensing, and transcriptional responses according to the dynamics of cellular Pi status in plants. Anticipated challenges and pending questions as well as prospects are also discussed.
Collapse
Affiliation(s)
- Zhengrui Wang
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Hui-Fen Kuo
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Tzyy-Jen Chiou
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan
- Author for communication:
| |
Collapse
|
4
|
Menadue DJ, Riboni M, Baumann U, Schilling RK, Plett DC, Roy SJ. Proton-pumping pyrophosphatase homeolog expression is a dynamic trait in bread wheat ( Triticum aestivum). PLANT DIRECT 2021; 5:e354. [PMID: 34646976 PMCID: PMC8496507 DOI: 10.1002/pld3.354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 08/20/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Proton-pumping pyrophosphatases (H+-PPases) have been shown to enhance biomass and yield. However, to date, there has been little work towards identify genes encoding H+-PPases in bread wheat (Triticum aestivum) (TaVPs) and limited knowledge on how the expression of these genes varies across different growth stages and tissue types. In this study, the IWGSC database was used to identify two novel TaVP genes, TaVP4 and TaVP5, and elucidate the complete homeolog sequences of the three known TaVP genes, bringing the total number of bread wheat TaVPs from 9 to 15. Gene expression levels of each TaVP homeolog were assessed using quantitative real-time PCR (qRT-PCR) in four diverse wheat varieties in terms of phenotypic traits related to high vacuolar pyrophosphatase expression. Homeolog expression was analyzed across multiple tissue types and developmental stages. Expression levels of the TaVP homeologs were found to vary significantly between varieties, tissues and plant developmental stages. During early development (Z10 and Z13), expressions of TaVP1 and TaVP2 homeologs were higher in shoot tissue than root tissue, with both shoot and root expression increasing in later developmental stages (Z22). TaVP2-D was expressed in all varieties and tissue types and was the most highly expressed homeolog at all developmental stages. Expression of the TaVP3 homeologs was restricted to developing grain (Z75), while TaVP4 homeolog expression was higher at Z22 than earlier developmental stages. Variation in TaVP4B was detected among varieties at Z22 and Z75, with Buck Atlantico (high biomass) and Scout (elite Australian cultivar) having the highest levels of expression. These findings offer a comprehensive overview of the bread wheat H+-PPase family and identify variation in TaVP homeolog expression that will be of use to improve the growth, yield, and abiotic stress tolerance of bread wheat.
Collapse
Affiliation(s)
- Daniel Jamie Menadue
- School of Agriculture, Food and WineUniversity of AdelaideAdelaideSouth AustraliaAustralia
- Australian Centre for Plant Functional GenomicsThe University of AdelaideUrrbraeSouth AustraliaAustralia
| | - Matteo Riboni
- School of Agriculture, Food and WineUniversity of AdelaideAdelaideSouth AustraliaAustralia
- Australian Centre for Plant Functional GenomicsThe University of AdelaideUrrbraeSouth AustraliaAustralia
| | - Ute Baumann
- School of Agriculture, Food and WineUniversity of AdelaideAdelaideSouth AustraliaAustralia
- Australian Centre for Plant Functional GenomicsThe University of AdelaideUrrbraeSouth AustraliaAustralia
| | - Rhiannon Kate Schilling
- School of Agriculture, Food and WineUniversity of AdelaideAdelaideSouth AustraliaAustralia
- Australian Centre for Plant Functional GenomicsThe University of AdelaideUrrbraeSouth AustraliaAustralia
- Department of Primary Industries and RegionsSouth Australian Research and Development InstituteUrrbraeSouth AustraliaAustralia
| | - Darren Craig Plett
- School of Agriculture, Food and WineUniversity of AdelaideAdelaideSouth AustraliaAustralia
- Australian Plant Phenomics Facility, The Plant AcceleratorThe University of AdelaideAdelaideSouth AustraliaAustralia
| | - Stuart John Roy
- School of Agriculture, Food and WineUniversity of AdelaideAdelaideSouth AustraliaAustralia
- Australian Centre for Plant Functional GenomicsThe University of AdelaideUrrbraeSouth AustraliaAustralia
- ARC Industrial Transformation Research Hub for Wheat in a Hot and Dry ClimateUniversity of AdelaideAdelaideSouth AustraliaAustralia
| |
Collapse
|
5
|
Holzheu P, Krebs M, Larasati C, Schumacher K, Kummer U. An integrative view on vacuolar pH homeostasis in Arabidopsis thaliana: Combining mathematical modeling and experimentation. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 106:1541-1556. [PMID: 33780094 DOI: 10.1111/tpj.15251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 02/27/2021] [Accepted: 03/10/2021] [Indexed: 06/12/2023]
Abstract
The acidification of plant vacuoles is of great importance for various physiological processes, as a multitude of secondary active transporters utilize the proton gradient established across the vacuolar membrane. Vacuolar-type H+ -translocating ATPases and a pyrophosphatase are thought to enable vacuoles to accumulate protons against their electrochemical potential. However, recent studies pointed to the ATPase located at the trans-Golgi network/early endosome (TGN/EE) to contribute to vacuolar acidification in a manner not understood as of now. Here, we combined experimental data and computational modeling to test different hypotheses for vacuolar acidification mechanisms. For this, we analyzed different models with respect to their ability to describe existing experimental data. To better differentiate between alternative acidification mechanisms, new experimental data have been generated. By fitting the models to the experimental data, we were able to prioritize the hypothesis in which vesicular trafficking of Ca2+ /H+ -antiporters from the TGN/EE to the vacuolar membrane and the activity of ATP-dependent Ca2+ -pumps at the tonoplast might explain the residual acidification observed in Arabidopsis mutants defective in vacuolar proton pump activity. The presented modeling approach provides an integrative perspective on vacuolar pH regulation in Arabidopsis and holds potential to guide further experimental work.
Collapse
Affiliation(s)
- Pascal Holzheu
- Department of Modeling of Biological Processes, COS Heidelberg/Bioquant, Heidelberg University, Im Neuenheimer Feld 267, Heidelberg, 69120, Germany
| | - Melanie Krebs
- Department of Cell Biology, COS Heidelberg, Heidelberg University, Im Neuenheimer Feld 230, Heidelberg, 69120, Germany
| | - Catharina Larasati
- Department of Cell Biology, COS Heidelberg, Heidelberg University, Im Neuenheimer Feld 230, Heidelberg, 69120, Germany
| | - Karin Schumacher
- Department of Cell Biology, COS Heidelberg, Heidelberg University, Im Neuenheimer Feld 230, Heidelberg, 69120, Germany
| | - Ursula Kummer
- Department of Modeling of Biological Processes, COS Heidelberg/Bioquant, Heidelberg University, Im Neuenheimer Feld 267, Heidelberg, 69120, Germany
| |
Collapse
|
6
|
Gunji S, Oda Y, Takigawa-Imamura H, Tsukaya H, Ferjani A. Excess Pyrophosphate Restrains Pavement Cell Morphogenesis and Alters Organ Flatness in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2020; 11:31. [PMID: 32153602 PMCID: PMC7047283 DOI: 10.3389/fpls.2020.00031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 01/13/2020] [Indexed: 05/31/2023]
Abstract
In Arabidopsis thaliana, the vacuolar proton-pumping pyrophosphatase (H+-PPase) is highly expressed in young tissues, which consume large amounts of energy in the form of nucleoside triphosphates and produce pyrophosphate (PPi) as a byproduct. We reported that excess PPi in the H+-PPase loss-of-function fugu5 mutant severely compromised gluconeogenesis from seed storage lipids, arrested cell division in cotyledonary palisade tissue, and triggered compensated cell enlargement; this phenotype was recovered upon sucrose supply. Thus, we provided evidence that the hydrolysis of inhibitory PPi, rather than vacuolar acidification, is the major contribution of H+-PPase during seedling establishment. Here, examination of the epidermis revealed that fugu5 pavement cells exhibited defective puzzle-cell formation. Importantly, removal of PPi from fugu5 background by the yeast cytosolic PPase IPP1, in fugu5-1 AVP1pro::IPP1 transgenic lines, restored the phenotypic aberrations of fugu5 pavement cells. Surprisingly, pavement cells in mutants with defects in gluconeogenesis (pck1-2) or the glyoxylate cycle (icl-2; mls-2) showed no phenotypic alteration, indicating that reduced sucrose production from seed storage lipids is not the cause of fugu5 epidermal phenotype. fugu5 had oblong cotyledons similar to those of angustifolia-1 (an-1), whose leaf pavement cells display an abnormal arrangement of cortical microtubules (MTs). To gain insight into the genetic interaction between ANGUSTIFOLIA and H+-PPase in pavement cell differentiation, an-1 fugu5-1 was analyzed. Surprisingly, epidermis developmental defects were synergistically enhanced in the double mutant. In fact, an-1 fugu5-1 pavement cells showed a striking three-dimensional growth phenotype on both abaxial and adaxial sides of cotyledons, which was recovered by hydrolysis of PPi in an-1 fugu5-1 AVP1pro::IPP1. Live imaging revealed that cortical MTs exhibited a reduced velocity, were slightly fragmented and sparse in the above lines compared to the WT. Consistently, addition of PPi in vitro led to a dose-dependent delay of tubulin polymerization, thus supporting a link between PPi and MT dynamics. Moreover, mathematical simulation of three-dimensional growth based on cotyledon proximo-distal and medio-lateral phenotypic quantification implicated restricted cotyledon expansion along the medio-lateral axis in the crinkled surface of an-1 fugu5-1. Together, our data suggest that PPi homeostasis is a prerequisite for proper pavement cell morphogenesis, epidermal growth and development, and organ flattening.
Collapse
Affiliation(s)
- Shizuka Gunji
- United Graduate School of Education, Tokyo Gakugei University, Tokyo, Japan
| | - Yoshihisa Oda
- Department of Gene Function and Phenomics, National Institute of Genetics, Mishima, Japan
- Department of Genetics, The Graduate University for Advanced Studies, SOKENDAI, Mishima, Japan
| | - Hisako Takigawa-Imamura
- Department of Anatomy and Cell Biology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hirokazu Tsukaya
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Ali Ferjani
- United Graduate School of Education, Tokyo Gakugei University, Tokyo, Japan
- Department of Biology, Tokyo Gakugei University, Tokyo, Japan
| |
Collapse
|
7
|
Munns R, Day DA, Fricke W, Watt M, Arsova B, Barkla BJ, Bose J, Byrt CS, Chen ZH, Foster KJ, Gilliham M, Henderson SW, Jenkins CLD, Kronzucker HJ, Miklavcic SJ, Plett D, Roy SJ, Shabala S, Shelden MC, Soole KL, Taylor NL, Tester M, Wege S, Wegner LH, Tyerman SD. Energy costs of salt tolerance in crop plants. THE NEW PHYTOLOGIST 2020; 225:1072-1090. [PMID: 31004496 DOI: 10.1111/nph.15864] [Citation(s) in RCA: 177] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 03/25/2019] [Indexed: 05/21/2023]
Abstract
Agriculture is expanding into regions that are affected by salinity. This review considers the energetic costs of salinity tolerance in crop plants and provides a framework for a quantitative assessment of costs. Different sources of energy, and modifications of root system architecture that would maximize water vs ion uptake are addressed. Energy requirements for transport of salt (NaCl) to leaf vacuoles for osmotic adjustment could be small if there are no substantial leaks back across plasma membrane and tonoplast in root and leaf. The coupling ratio of the H+ -ATPase also is a critical component. One proposed leak, that of Na+ influx across the plasma membrane through certain aquaporin channels, might be coupled to water flow, thus conserving energy. For the tonoplast, control of two types of cation channels is required for energy efficiency. Transporters controlling the Na+ and Cl- concentrations in mitochondria and chloroplasts are largely unknown and could be a major energy cost. The complexity of the system will require a sophisticated modelling approach to identify critical transporters, apoplastic barriers and root structures. This modelling approach will inform experimentation and allow a quantitative assessment of the energy costs of NaCl tolerance to guide breeding and engineering of molecular components.
Collapse
Affiliation(s)
- Rana Munns
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, and School of Agriculture and Environment, The University of Western Australia, Crawley, WA, 6009, Australia
- CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia
| | - David A Day
- College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia, 5001, Australia
| | - Wieland Fricke
- School of Biology and Environmental Sciences, University College Dublin (UCD), Dublin, 4, Ireland
| | - Michelle Watt
- Plant Sciences, Institute of Bio and Geosciences, Forschungszentrum Juelich, Helmholtz Association, 52425, Juelich, Germany
| | - Borjana Arsova
- Plant Sciences, Institute of Bio and Geosciences, Forschungszentrum Juelich, Helmholtz Association, 52425, Juelich, Germany
| | - Bronwyn J Barkla
- Southern Cross Plant Science, Southern Cross University, Lismore, NSW, 2481, Australia
| | - Jayakumar Bose
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Caitlin S Byrt
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
- Research School of Biology, Australian National University, Canberra, ACT, 2600, Australia
| | - Zhong-Hua Chen
- School of Science and Health, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Kylie J Foster
- Phenomics and Bioinformatics Research Centre, School of Information Technology and Mathematical Sciences, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Matthew Gilliham
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Sam W Henderson
- Commonwealth Scientific and Industrial Research Organisation, Agriculture and Food, Urrbrae, SA, 5064, Australia
| | - Colin L D Jenkins
- College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia, 5001, Australia
| | - Herbert J Kronzucker
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Stanley J Miklavcic
- Phenomics and Bioinformatics Research Centre, School of Information Technology and Mathematical Sciences, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Darren Plett
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Stuart J Roy
- Australian Research Council (ARC) Industrial Transformation Research Hub for Wheat in a Hot and Dry Climate, School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, SA, 5064, Australia
| | - Sergey Shabala
- Tasmanian Institute for Agriculture, University of Tasmania, Private Bag 54, Hobart, Tas., 7001, Australia
- International Centre for Environmental Membrane Biology, Foshan University, Foshan, 528000, China
| | - Megan C Shelden
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Kathleen L Soole
- College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia, 5001, Australia
| | - Nicolas L Taylor
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Molecular Sciences and Institute of Agriculture, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Mark Tester
- Biological and Environmental Sciences & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Stefanie Wege
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Lars H Wegner
- Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), D-76344, Eggenstein-Leopoldshafen, Germany
| | - Stephen D Tyerman
- Australian Research Council (ARC) Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| |
Collapse
|
8
|
Asaoka M, Inoue SI, Gunji S, Kinoshita T, Maeshima M, Tsukaya H, Ferjani A. Excess Pyrophosphate within Guard Cells Delays Stomatal Closure. PLANT & CELL PHYSIOLOGY 2019; 60:875-887. [PMID: 30649470 DOI: 10.1093/pcp/pcz002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 12/28/2018] [Indexed: 05/08/2023]
Abstract
A variety of cellular metabolic reactions generate inorganic pyrophosphate (PPi) as an ATP hydrolysis byproduct. The vacuolar H+-translocating pyrophosphatase (H+-PPase) loss-of-function fugu5 mutant is susceptible to drought and displays pleotropic postgerminative growth defects due to excess PPi. It was recently reported that stomatal closure after abscisic acid (ABA) treatment is delayed in vhp1-1, a fugu5 allele. In contrast, we found that specific removal of PPi rescued all of the above fugu5 developmental and growth defects. Hence, we speculated that excess PPi itself, rather than vacuolar acidification, might delay stomatal closure. To test this hypothesis, we constructed transgenic plants expressing the yeast IPP1 gene (encoding a cytosolic pyrophosphatase) driven by a guard cell-specific promoter (pGC1::IPP1) in the fugu5 background. Our measurements confirmed stomatal closure defects in fugu5, further supporting a role for H+-PPase in stomatal functioning. Importantly, while pGC1::IPP1 transgenics morphologically mimicked fugu5, stomatal closure was restored in response to ABA and darkness. Quantification of water loss revealed that fugu5 stomata were almost completely insensitive to ABA. In addition, growth of pGC1::IPP1 plants was promoted compared to fugu5 throughout their life; however, it did not reach the wild type level. fugu5 also displayed an increased stomatal index, in violation of the one-cell-spacing rule, and phenotypes recovered upon removal of PPi by pAVP1::IPP1 (FUGU5, VHP1 and AVP1 are the same gene encoding H+-PPase), but not in the pGC1::IPP1 line. Taken together, these results clearly support our hypothesis that dysfunction in stomata is triggered by excess PPi within guard cells, probably via perturbed guard cell metabolism.
Collapse
Affiliation(s)
- Mariko Asaoka
- Department of Biology, Tokyo Gakugei University, Koganei-shi, Tokyo, Japan
| | - Shin-Ichiro Inoue
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Shizuka Gunji
- United Graduated School of Education, Tokyo Gakugei University, Tokyo, Japan
| | - Toshinori Kinoshita
- Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan
| | - Masayoshi Maeshima
- Laboratory of Cell Dynamics, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Hirokazu Tsukaya
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
- Exploratory Research Center on Life and Living Systems (ExCELLS), Okazaki, Aichi, Japan
| | - Ali Ferjani
- Department of Biology, Tokyo Gakugei University, Koganei-shi, Tokyo, Japan
- United Graduated School of Education, Tokyo Gakugei University, Tokyo, Japan
| |
Collapse
|
9
|
Passamani LZ, Bertolazi AA, Ramos AC, Santa-Catarina C, Thelen JJ, Silveira V. Embryogenic Competence Acquisition in Sugar Cane Callus Is Associated with Differential H+-Pump Abundance and Activity. J Proteome Res 2018; 17:2767-2779. [DOI: 10.1021/acs.jproteome.8b00213] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Lucas Z. Passamani
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Avenue Alberto Lamego 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
- Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Avenue Alberto Lamego 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | - Amanda A. Bertolazi
- Laboratório de Fisiologia e Bioquímica de Microrganismos, CBB-UENF, Avenue Alberto Lamego 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | - Alessandro C. Ramos
- Laboratório de Fisiologia e Bioquímica de Microrganismos, CBB-UENF, Avenue Alberto Lamego 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | - Claudete Santa-Catarina
- Laboratório de Biologia Celular e Tecidual, CBB-UENF, Avenue Alberto Lamego 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| | | | - Vanildo Silveira
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Avenue Alberto Lamego 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
- Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Avenue Alberto Lamego 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil
| |
Collapse
|
10
|
Planchet E, Lothier J, Limami AM. Hypoxic Respiratory Metabolism in Plants: Reorchestration of Nitrogen and Carbon Metabolisms. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/978-3-319-68703-2_10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
11
|
Kang P, Bao AK, Kumar T, Pan YQ, Bao Z, Wang F, Wang SM. Assessment of Stress Tolerance, Productivity, and Forage Quality in T 1 Transgenic Alfalfa Co-overexpressing ZxNHX and ZxVP1-1 from Zygophyllum xanthoxylum. FRONTIERS IN PLANT SCIENCE 2016; 7:1598. [PMID: 27833624 PMCID: PMC5081344 DOI: 10.3389/fpls.2016.01598] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 10/10/2016] [Indexed: 05/21/2023]
Abstract
Salinization, desertification, and soil nutrient deprivation are threatening the production of alfalfa (Medicago sativa L.) in northern China. We have previously generated T0 transgenic alfalfa co-overexpressing Zygophyllum xanthoxylum ZxNHX and ZxVP1-1 genes with enhanced salt and drought tolerance. To further develop this excellent breeding material into the new forage cultivar, stress tolerance, productivity, and forage quality of T1 transgenic alfalfa (GM) were assessed in this study. The GM inherited the traits of salt and drought tolerance from T0 generation. Most importantly, co-overexpression of ZxNHX and ZxVP1-1 enhanced the tolerance to Pi deficiency in GM, which was associated with more Pi accumulation in plants. Meanwhile, T1 transgenic alfalfa developed a larger root system with increased root size, root dry weight and root/shoot ratio, which may be one important reason for the improvement of phosphorus nutrition and high biomass accumulation in GM under various conditions. GM also accumulated more crude protein, crude fiber, crude fat, and crude ash than wild-type (WT) plants, especially under stress conditions and in the field. More interestingly, the crude fat contents sharply dropped in WT (by 66-74%), whereas showed no change or decreased less in GM, when subjected to salinity, drought or low-Pi. Our results indicate that T1 transgenic alfalfa co-overexpressing ZxNHX and ZxVP1-1 shows stronger stress tolerance, higher productivity and better forage quality. This study provides a solid foundation for creating the alfalfa cultivars with high yield, good quality and wide adaptability on saline, dry, and nutrient-deprived marginal lands of northern China.
Collapse
Affiliation(s)
| | - Ai-Ke Bao
- *Correspondence: Ai-Ke Bao, Suo-Min Wang,
| | | | | | | | | | - Suo-Min Wang
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou UniversityLanzhou, China
| |
Collapse
|
12
|
Wilson KA, Chavda BJ, Pierre-Louis G, Quinn A, Tan-Wilson A. Role of vacuolar membrane proton pumps in the acidification of protein storage vacuoles following germination. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2016; 104:242-9. [PMID: 27043965 DOI: 10.1016/j.plaphy.2016.03.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 03/06/2016] [Accepted: 03/24/2016] [Indexed: 06/05/2023]
Abstract
During soybean (Glycine max (L.) Merrill) seed development, protease C1, the proteolytic enzyme that initiates breakdown of the storage globulins β-conglycinin and glycinin at acidic pH, is present in the protein storage vacuoles (PSVs), the same subcellular compartments in seed cotyledons where its protein substrates accumulate. Actual proteolysis begins to be evident 24 h after seed imbibition, when the PSVs become acidic, as indicated by acridine orange accumulation visualized by confocal microscopy. Imidodiphosphate (IDP), a non-hydrolyzable substrate analog of proton-translocating pyrophosphatases, strongly inhibited acidification of the PSVs in the cotyledons. Consistent with this finding, IDP treatment inhibited mobilization of β-conglycinin and glycinin, the inhibition being greater at 3 days compared to 6 days after seed imbibition. The embryonic axis does not appear to play a role in the initial PSV acidification in the cotyledon, as axis detachment did not prevent acridine orange accumulation three days after imbibition. SDS-PAGE and immunoblot analyses of cotyledon protein extracts were consistent with limited digestion of the 7S and 11S globulins by protease C1 starting at the same time and proceeding at the same rate in detached cotyledons compared to cotyledons of intact seedlings. Embryonic axis removal did slow down further breakdown of the storage globulins by reactions known to be catalyzed by protease C2, a cysteine protease that normally appears later in seedling growth to continue the storage protein breakdown initiated by protease C1.
Collapse
Affiliation(s)
- Karl A Wilson
- Department of Biological Sciences, Binghamton University, Binghamton, NY 13902-6000, USA.
| | - Burzin J Chavda
- Department of Biological Sciences, Binghamton University, Binghamton, NY 13902-6000, USA
| | - Gandhy Pierre-Louis
- Department of Biological Sciences, Binghamton University, Binghamton, NY 13902-6000, USA
| | - Adam Quinn
- Department of Biological Sciences, Binghamton University, Binghamton, NY 13902-6000, USA
| | - Anna Tan-Wilson
- Department of Biological Sciences, Binghamton University, Binghamton, NY 13902-6000, USA
| |
Collapse
|
13
|
Bao AK, Du BQ, Touil L, Kang P, Wang QL, Wang SM. Co-expression of tonoplast Cation/H(+) antiporter and H(+)-pyrophosphatase from xerophyte Zygophyllum xanthoxylum improves alfalfa plant growth under salinity, drought and field conditions. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:964-75. [PMID: 26268400 DOI: 10.1111/pbi.12451] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 07/10/2015] [Indexed: 05/20/2023]
Abstract
Salinity and drought are major environmental factors limiting the growth and productivity of alfalfa worldwide as this economically important legume forage is sensitive to these kinds of abiotic stress. In this study, transgenic alfalfa lines expressing both tonoplast NXH and H(+)-PPase genes, ZxNHX and ZxVP1-1 from the xerophyte Zygophyllum xanthoxylum L., were produced via Agrobacterium tumefaciens-mediated transformation. Compared with wild-type (WT) plants, transgenic alfalfa plants co-expressing ZxNHX and ZxVP1-1 grew better with greater plant height and dry mass under normal or stress conditions (NaCl or water-deficit) in the greenhouse. The growth performance of transgenic alfalfa plants was associated with more Na(+), K(+) and Ca(2+) accumulation in leaves and roots, as a result of co-expression of ZxNHX and ZxVP1-1. Cation accumulation contributed to maintaining intracellular ions homoeostasis and osmoregulation of plants and thus conferred higher leaf relative water content and greater photosynthesis capacity in transgenic plants compared to WT when subjected to NaCl or water-deficit stress. Furthermore, the transgenic alfalfa co-expressing ZxNHX and ZxVP1-1 also grew faster than WT plants under field conditions, and most importantly, exhibited enhanced photosynthesis capacity by maintaining higher net photosynthetic rate, stomatal conductance, and water-use efficiency than WT plants. Our results indicate that co-expression of tonoplast NHX and H(+)-PPase genes from a xerophyte significantly improved the growth of alfalfa, and enhanced its tolerance to high salinity and drought. This study laid a solid basis for reclaiming and restoring saline and arid marginal lands as well as improving forage yield in northern China.
Collapse
Affiliation(s)
- Ai-Ke Bao
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Bao-Qiang Du
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Lanzhou Animal Husbandry and Veterinary Institute, Lanzhou, China
| | - Leila Touil
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Laboratory of arid and oasis cropping, Institute of Arid Area (IRA), Medenine, Tunisia
| | - Peng Kang
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Qiang-Long Wang
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Suo-Min Wang
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| |
Collapse
|
14
|
Katano M, Takahashi K, Hirano T, Kazama Y, Abe T, Tsukaya H, Ferjani A. Suppressor Screen and Phenotype Analyses Revealed an Emerging Role of the Monofunctional Peroxisomal Enoyl-CoA Hydratase 2 in Compensated Cell Enlargement. FRONTIERS IN PLANT SCIENCE 2016; 7:132. [PMID: 26925070 PMCID: PMC4756126 DOI: 10.3389/fpls.2016.00132] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 01/25/2016] [Indexed: 05/02/2023]
Abstract
Efficient use of seed nutrient reserves is crucial for germination and establishment of plant seedlings. Mobilizing seed oil reserves in Arabidopsis involves β-oxidation, the glyoxylate cycle, and gluconeogenesis, which provide essential energy and the carbon skeletons needed to sustain seedling growth until photoautotrophy is acquired. We demonstrated that H(+)-PPase activity is required for gluconeogenesis. Lack of H(+)-PPase in fugu5 mutants increases cytosolic pyrophosphate (PPi) levels, which partially reduces sucrose synthesis de novo and inhibits cell division. In contrast, post-mitotic cell expansion in cotyledons was unusually enhanced, a phenotype called compensation. Therefore, it appears that PPi inhibits several cellular functions, including cell cycling, to trigger compensated cell enlargement (CCE). Here, we mutagenized fugu5-1 seeds with (12)C(6+) heavy-ion irradiation and screened mutations that restrain CCE to gain insight into the genetic pathway(s) involved in CCE. We isolated A#3-1, in which cell size was severely reduced, but cell number remained similar to that of original fugu5-1. Moreover, cell number decreased in A#3-1 single mutant (A#3-1sm), similar to that of fugu5-1, but cell size was almost equal to that of the wild type. Surprisingly, A#3-1 mutation did not affect CCE in other compensation exhibiting mutant backgrounds, such as an3-4 and fugu2-1/fas1-6. Subsequent map-based cloning combined with genome sequencing and HRM curve analysis identified enoyl-CoA hydratase 2 (ECH2) as the causal gene of A#3-1. The above phenotypes were consistently observed in the ech2-1 allele and supplying sucrose restored the morphological and cellular phenotypes in fugu5-1, ech2-1, A#3-1sm, fugu5-1 ech2-1, and A#3-1; fugu5-1. Taken together, these results suggest that defects in either H(+)-PPase or ECH2 compromise cell proliferation due to defects in mobilizing seed storage lipids. In contrast, ECH2 alone likely promotes CCE during the post-mitotic cell expansion stage of cotyledon development, probably by converting indolebutyric acid to indole acetic acid.
Collapse
Affiliation(s)
- Mana Katano
- Department of Biology, Tokyo Gakugei UniversityTokyo, Japan
| | | | - Tomonari Hirano
- Department of Biochemistry and Applied Biosciences, Miyazaki UniversityMiyazaki, Japan
| | | | | | - Hirokazu Tsukaya
- Department of Biological Sciences, Graduate School of Science, University of TokyoTokyo, Japan
- Okazaki Institute for Integrative Bioscience, National Institutes of Natural SciencesOkazaki, Japan
| | - Ali Ferjani
- Department of Biology, Tokyo Gakugei UniversityTokyo, Japan
- *Correspondence: Ali Ferjani,
| |
Collapse
|
15
|
Kriegel A, Andrés Z, Medzihradszky A, Krüger F, Scholl S, Delang S, Patir-Nebioglu MG, Gute G, Yang H, Murphy AS, Peer WA, Pfeiffer A, Krebs M, Lohmann JU, Schumacher K. Job Sharing in the Endomembrane System: Vacuolar Acidification Requires the Combined Activity of V-ATPase and V-PPase. THE PLANT CELL 2015; 27:3383-96. [PMID: 26589552 PMCID: PMC4707456 DOI: 10.1105/tpc.15.00733] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 10/21/2015] [Accepted: 11/05/2015] [Indexed: 05/19/2023]
Abstract
The presence of a large central vacuole is one of the hallmarks of a prototypical plant cell, and the multiple functions of this compartment require massive fluxes of molecules across its limiting membrane, the tonoplast. Transport is assumed to be energized by the membrane potential and the proton gradient established by the combined activity of two proton pumps, the vacuolar H(+)-pyrophosphatase (V-PPase) and the vacuolar H(+)-ATPase (V-ATPase). Exactly how labor is divided between these two enzymes has remained elusive. Here, we provide evidence using gain- and loss-of-function approaches that lack of the V-ATPase cannot be compensated for by increased V-PPase activity. Moreover, we show that increased V-ATPase activity during cold acclimation requires the presence of the V-PPase. Most importantly, we demonstrate that a mutant lacking both of these proton pumps is conditionally viable and retains significant vacuolar acidification, pointing to a so far undetected contribution of the trans-Golgi network/early endosome-localized V-ATPase to vacuolar pH.
Collapse
Affiliation(s)
- Anne Kriegel
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Zaida Andrés
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Anna Medzihradszky
- Department of Stem Cell Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Falco Krüger
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Stefan Scholl
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Simon Delang
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - M Görkem Patir-Nebioglu
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Gezahegn Gute
- Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland 20742
| | - Haibing Yang
- Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana 47907
| | - Angus S Murphy
- Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland 20742
| | - Wendy Ann Peer
- Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland 20742 Environmental Science and Technology, University of Maryland, College Park, Maryland 20742
| | - Anne Pfeiffer
- Department of Stem Cell Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Melanie Krebs
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Jan U Lohmann
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Karin Schumacher
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| |
Collapse
|
16
|
Liu J, Pace D, Dou Z, King TP, Guidot D, Li ZH, Carruthers VB, Moreno SNJ. A vacuolar-H(+) -pyrophosphatase (TgVP1) is required for microneme secretion, host cell invasion, and extracellular survival of Toxoplasma gondii. Mol Microbiol 2014; 93:698-712. [PMID: 24975633 DOI: 10.1111/mmi.12685] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/19/2014] [Indexed: 01/17/2023]
Abstract
The vacuolar proton pyrophosphatase (H(+) -PPase) of Toxoplasma gondii (TgVP1), a membrane proton pump, localizes to acidocalcisomes and a novel lysosome-like compartment termed plant-like vacuole (PLV) or vacuolar compartment (VAC). We report the characterization of a T. gondii null mutant for the TgVP1 gene. Propagation of these mutants decreased significantly because of deficient attachment and invasion of host cells, which correlated with deficient microneme secretion. Processing of cathepsin L (CPL) in these mutants was deficient only when the parasites were incubated in the presence of low concentrations of the vacuolar H(+) -ATPase (V-H(+) -ATPase) inhibitor bafilomycin A1 , suggesting that either TgVP1 or the T. gondii V-H(+) -ATPase (TgVATPase) are sufficient to support CPL processing. The lack of TgVP1 did not affect processing of micronemal proteins, indicating that it does not contribute to proMIC maturations. The TgVP1 null mutants were more sensitive to extracellular conditions and were less virulent in mice. We demonstrate that T. gondii tachyzoites possess regulatory volume decrease capability during hypo-osmotic stress and this ability is impaired in TgVP1 null mutants implicating TgVP1 in osmoregulation. We hypothesize that osmoregulation is needed for host cell invasion and that TgVP1 plays a role during the normal lytic cycle of T. gondii.
Collapse
Affiliation(s)
- Jing Liu
- Center for Tropical and Emerging Global Diseases and Department of Cellular Biology, University of Georgia, GA, 30602-7400, USA; College of Veterinary Medicine, China Agricultural University, Beijing, 100193, China
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Mustroph A, Hess N, Sasidharan R. Hypoxic Energy Metabolism and PPi as an Alternative Energy Currency. LOW-OXYGEN STRESS IN PLANTS 2014. [DOI: 10.1007/978-3-7091-1254-0_9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
18
|
Regulation of PPi Levels Through the Vacuolar Membrane H+-Pyrophosphatase. PROGRESS IN BOTANY 2014. [DOI: 10.1007/978-3-642-38797-5_5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
19
|
Venancio JB, Catunda MG, Ogliari J, Rima JAH, Okorokova-Facanha AL, Okorokov LA, Facanha AR. A vacuolar H(+)-pyrophosphatase differential activation and energy coupling integrate the responses of weeds and crops to drought stress. Biochim Biophys Acta Gen Subj 2013; 1840:1987-92. [PMID: 24365406 DOI: 10.1016/j.bbagen.2013.12.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 12/04/2013] [Accepted: 12/15/2013] [Indexed: 11/24/2022]
Abstract
BACKGROUND Cyperus rotundus L. is a C4 weed of large vegetative and reproductive vigor endowed with competitive advantages over most crop species mainly under adverse environmental conditions. Vacuole functions are critical for the mechanisms of drought resistance, and here the modulation of the primary system of vacuolar ion transport is investigated during a transient water stress imposed to this weed and to C4 crop species (Zea mays L.). METHODS The vacuolar H(+) pumps, the H(+)-ATPase and H(+)-PPiase, expression, activities and the energy coupling were spectrophotometrically investigated as key elements in the differential drought-resistance mechanisms developed by weeds and crops. RESULTS In C. rotundus tonoplasts, ATP hydrolysis was more sensitive to drought than its coupled H(+) transport, which was in turn at least 3-folds faster than that mediated by the H(+)-PPiase. Its PPi hydrolysis was only slightly affected by severe water deficit, contrasting with the disruption induced in the PPi-dependent H(+)-gradient. This effect was antagonized by plant rehydration as the H(+)-PPiase activity was highly stimulated, reassuming a coupled PPi-driven H(+) pumping. Maize tonoplasts exhibited 2-4 times lower hydrolytic activities than that of C. rotundus, but were able to overactivate specifically PPi-dependent H(+) pumping in response to stress relief, resulting in an enhanced H(+)-pumps coupling efficiency. CONCLUSION These results together with immunoanalysis revealed profiles consistent with pre- and post-translational changes occurring on the tonoplast H(+)-pumps, which differ between weeds and crops upon water deficit. GENERAL SIGNIFICANCE The evidences highlight an unusual modulation of the H(+)-PPiase energy coupling as a key biochemical change related to environmental stresses adaptive capacity of plants.
Collapse
Affiliation(s)
- Josimara Barcelos Venancio
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil; Núcleo de Desenvolvimento de Insumos Biológicos para Agricultura (NUDIBA), Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil
| | | | - Juarez Ogliari
- Instituto Federal Fluminense, Bom Jesus do Itabapoana, RJ, Brazil
| | - Janaína Aparecida Hottz Rima
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil; Núcleo de Desenvolvimento de Insumos Biológicos para Agricultura (NUDIBA), Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil
| | - Anna Lvovna Okorokova-Facanha
- Laboratório de Fisiologia e Bioquímica de Microorganismos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil
| | - Lev Alexandrovitich Okorokov
- Laboratório de Fisiologia e Bioquímica de Microorganismos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil
| | - Arnoldo Rocha Facanha
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil; Núcleo de Desenvolvimento de Insumos Biológicos para Agricultura (NUDIBA), Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
| |
Collapse
|
20
|
Ferjani A, Ishikawa K, Asaoka M, Ishida M, Horiguchi G, Maeshima M, Tsukaya H. Enhanced cell expansion in a KRP2 overexpressor is mediated by increased V-ATPase activity. PLANT & CELL PHYSIOLOGY 2013; 54:1989-98. [PMID: 24068796 DOI: 10.1093/pcp/pct138] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Decreased cell numbers during leaf development often trigger increased cell size, a phenomenon called compensation. In compensation-exhibiting mutants, the unusually high cell expansion activity occurs through two different mechanisms during the post-mitotic stage of leaf development, except in the KIP-RELATED PROTEIN 2-overexpressing line (KRP2 o/e), whose cell sizes are 2-fold greater during proliferative growth. However, the molecular basis of compensated cell expansion (CCE) has not been characterized. The det3-1 mutant has a mutation in the C-subunit of the vacuolar-type H(+)-ATPase (V-ATPase) complex that causes a 50% decrease in its activity and cell size. To determine the contribution of V-ATPase activity to CCE, the cellular phenotypes of double mutants between det3-1 and compensation-exhibiting fugu5-1, an3-4, fas1-5 and KRP2 o/e were analyzed in detail. Interestingly, while decreased V-ATPase activity caused by det3-1 did not suppress CCE in fugu5-1, fas1-5 and an3-4, CCE in KRP2 o/e was totally suppressed. Furthermore, measurements revealed that the activity and quantity of the A-subunit of the V-ATPase complex were significantly increased in the shoots of KRP2 o/e plants. Importantly, the unusually increased size of actively dividing KRP2 o/e cells was restored to normal in the det3-1 background. Taken together, our data strongly suggest that CCE in KRP2 o/e, but not in other compensation-exhibiting mutants, occurs exclusively through the increase of V-ATPase activity.
Collapse
Affiliation(s)
- Ali Ferjani
- Department of Biology, Tokyo Gakugei University, Koganei-shi, 184-8501 Japan
| | | | | | | | | | | | | |
Collapse
|
21
|
Seidel T, Siek M, Marg B, Dietz KJ. Energization of vacuolar transport in plant cells and its significance under stress. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2013; 304:57-131. [PMID: 23809435 DOI: 10.1016/b978-0-12-407696-9.00002-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The plant vacuole is of prime importance in buffering environmental perturbations and in coping with abiotic stress caused by, for example, drought, salinity, cold, or UV. The large volume, the efficient integration in anterograde and retrograde vesicular trafficking, and the dynamic equipment with tonoplast transporters enable the vacuole to fulfill indispensible functions in cell biology, for example, transient and permanent storage, detoxification, recycling, pH and redox homeostasis, cell expansion, biotic defence, and cell death. This review first focuses on endomembrane dynamics and then summarizes the functions, assembly, and regulation of secretory and vacuolar proton pumps: (i) the vacuolar H(+)-ATPase (V-ATPase) which represents a multimeric complex of approximately 800 kDa, (ii) the vacuolar H(+)-pyrophosphatase, and (iii) the plasma membrane H(+)-ATPase. These primary proton pumps regulate the cytosolic pH and provide the driving force for secondary active transport. Carriers and ion channels modulate the proton motif force and catalyze uptake and vacuolar compartmentation of solutes and deposition of xenobiotics or secondary compounds such as flavonoids. ABC-type transporters directly energized by MgATP complement the transport portfolio that realizes the multiple functions in stress tolerance of plants.
Collapse
Affiliation(s)
- Thorsten Seidel
- Biochemistry and Physiology of Plants, Faculty of Biology, Bielefeld University, Bielefeld, Germany.
| | | | | | | |
Collapse
|