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Stein P, Savy V, Williams AM, Williams CJ. Modulators of calcium signalling at fertilization. Open Biol 2020; 10:200118. [PMID: 32673518 PMCID: PMC7574550 DOI: 10.1098/rsob.200118] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 06/18/2020] [Indexed: 12/16/2022] Open
Abstract
Calcium (Ca2+) signals initiate egg activation across the animal kingdom and in at least some plants. These signals are crucial for the success of development and, in the case of mammals, health of the offspring. The mechanisms associated with fertilization that trigger these signals and the molecules that regulate their characteristic patterns vary widely. With few exceptions, a major contributor to fertilization-induced elevation in cytoplasmic Ca2+ is release from endoplasmic reticulum stores through the IP3 receptor. In some cases, Ca2+ influx from the extracellular space and/or release from alternative intracellular stores contribute to the rise in cytoplasmic Ca2+. Following the Ca2+ rise, the reuptake of Ca2+ into intracellular stores or efflux of Ca2+ out of the egg drive the return of cytoplasmic Ca2+ back to baseline levels. The molecular mediators of these Ca2+ fluxes in different organisms include Ca2+ release channels, uptake channels, exchangers and pumps. The functions of these mediators are regulated by their particular activating mechanisms but also by alterations in their expression and spatial organization. We discuss here the molecular basis for modulation of Ca2+ signalling at fertilization, highlighting differences across several animal phyla, and we mention key areas where questions remain.
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Affiliation(s)
- Paula Stein
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | - Virginia Savy
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | - Audrey M. Williams
- Department of Molecular Genetics and Cell Biology, The University of Chicago, Chicago, IL 60637, USA
| | - Carmen J. Williams
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
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Yan G, Liu H, Wang H, Lu Z, Wang Y, Mullan D, Hamblin J, Liu C. Accelerated Generation of Selfed Pure Line Plants for Gene Identification and Crop Breeding. FRONTIERS IN PLANT SCIENCE 2017; 8:1786. [PMID: 29114254 PMCID: PMC5660708 DOI: 10.3389/fpls.2017.01786] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 10/02/2017] [Indexed: 05/18/2023]
Abstract
Production of pure lines is an important step in biological studies and breeding of many crop plants. The major types of pure lines for biological studies and breeding include doubled haploid (DH) lines, recombinant inbred lines (RILs), and near isogenic lines (NILs). DH lines can be produced through microspore and megaspore culture followed by chromosome doubling while RILs and NILs can be produced through introgressions or repeated selfing of hybrids. DH approach was developed as a quicker method than conventional method to produce pure lines. However, its drawbacks of genotype-dependency and only a single chance of recombination limited its wider application. A recently developed fast generation cycling system (FGCS) achieved similar times to those of DH for the production of selfed pure lines but is more versatile as it is much less genotype-dependent than DH technology and does not restrict recombination to a single event. The advantages and disadvantages of the technologies and their produced pure line populations for different purposes of biological research and breeding are discussed. The development of a concept of complete in vitro meiosis and mitosis system is also proposed. This could integrate with the recently developed technologies of single cell genomic sequencing and genome wide selection, leading to a complete laboratory based pre-breeding scheme.
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Affiliation(s)
- Guijun Yan
- Faculty of Science, UWA School of Agriculture and Environment, University of Western Australia, Perth, WA, Australia
- The UWA Institute of Agriculture, University of Western Australia, Crawley, WA, Australia
- *Correspondence: Guijun Yan
| | - Hui Liu
- Faculty of Science, UWA School of Agriculture and Environment, University of Western Australia, Perth, WA, Australia
- The UWA Institute of Agriculture, University of Western Australia, Crawley, WA, Australia
| | - Haibo Wang
- Hebei Centre of Plant Genetic Engineering, Institute of Genetics and Physiology, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang, China
| | - Zhanyuan Lu
- Inner Mongolia Academy of Agriculture and Animal Husbandry Sciences, Huhhot, China
| | - Yanxia Wang
- Hebei Province Wheat Engineering Technical Research Center, Shijiazhuang Academy of Agricultural Sciences, Shijiazhuang, China
| | - Daniel Mullan
- Faculty of Science, UWA School of Agriculture and Environment, University of Western Australia, Perth, WA, Australia
- The UWA Institute of Agriculture, University of Western Australia, Crawley, WA, Australia
- InterGrain Pty. Ltd., Bibra Lake, WA, Australia
| | - John Hamblin
- Faculty of Science, UWA School of Agriculture and Environment, University of Western Australia, Perth, WA, Australia
- The UWA Institute of Agriculture, University of Western Australia, Crawley, WA, Australia
- SuperSeeds Technologies Pty. Ltd., Perth, WA, Australia
| | - Chunji Liu
- Faculty of Science, UWA School of Agriculture and Environment, University of Western Australia, Perth, WA, Australia
- The UWA Institute of Agriculture, University of Western Australia, Crawley, WA, Australia
- Commonwealth Scientific and Industrial Research Organisation Agriculture and Food, St. Lucia, QLD, Australia
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Pónya Z, Corsi I, Hoffmann R, Kovács M, Dobosy A, Kovács AZ, Cresti M, Barnabás B. When isolated at full receptivity, in vitro fertilized wheat (Triticum aestivum, L.) egg cells reveal [Ca2+]cyt oscillation of intracellular origin. Int J Mol Sci 2014; 15:23766-91. [PMID: 25535074 PMCID: PMC4284791 DOI: 10.3390/ijms151223766] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 08/19/2014] [Accepted: 09/25/2014] [Indexed: 11/28/2022] Open
Abstract
During in vitro fertilization of wheat (Triticum aestivum, L.) in egg cells isolated at various developmental stages, changes in cytosolic free calcium ([Ca2+]cyt) were observed. The dynamics of [Ca2+]cyt elevation varied, reflecting the difference in the developmental stage of the eggs used. [Ca2+]cyt oscillation was exclusively observed in fertile, mature egg cells fused with the sperm cell. To determine how [Ca2+]cyt oscillation in mature egg cells is generated, egg cells were incubated in thapsigargin, which proved to be a specific inhibitor of the endoplasmic reticulum (ER) Ca2+-ATPase in wheat egg cells. In unfertilized egg cells, the addition of thapsigargin caused an abrupt transient increase in [Ca2+]cyt in the absence of extracellular Ca2+, suggesting that an influx pathway for Ca2+ is activated by thapsigargin. The [Ca2+]cyt oscillation seemed to require the filling of an intracellular calcium store for the onset of which, calcium influx through the plasma membrane appeared essential. This was demonstrated by omitting extracellular calcium from (or adding GdCl3 to) the fusion medium, which prevented [Ca2+]cyt oscillation in mature egg cells fused with the sperm. Combined, these data permit the hypothesis that the first sperm-induced transient increase in [Ca2+]cyt depletes an intracellular Ca2+ store, triggering an increase in plasma membrane Ca2+ permeability, and this enhanced Ca2+ influx results in [Ca2+]cyt oscillation.
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Affiliation(s)
- Zsolt Pónya
- Department of Plant Production and Plant Protection, Institute of Plant Science, Faculty of Agricultural and Environmental Sciences, Kaposvár University, Kaposvár H-7400, Hungary.
| | - Ilaria Corsi
- Dipartimento di Scienze Ambientali "G. Sarfatti", University of Siena, Siena 53100, Italy.
| | - Richárd Hoffmann
- Department of Plant Production and Plant Protection, Institute of Plant Science, Faculty of Agricultural and Environmental Sciences, Kaposvár University, Kaposvár H-7400, Hungary.
| | - Melinda Kovács
- Institute of Physiology, Biochemistry and Animal Health, Faculty of Agricultural and Environmental Sciences, Kaposvár University, Kaposvár H-7400, Hungary.
| | - Anikó Dobosy
- Department of Plant Production and Plant Protection, Institute of Plant Science, Faculty of Agricultural and Environmental Sciences, Kaposvár University, Kaposvár H-7400, Hungary.
| | - Attila Zoltán Kovács
- Department of Technology of Animal Breeding and Management, Faculty of Agricultural and Environmental Sciences Kaposvár University, Kaposvár H-7400, Hungary.
| | - Mauro Cresti
- Dipartimento di Scienze Ambientali "G. Sarfatti", University of Siena, Siena 53100, Italy.
| | - Beáta Barnabás
- Department of Plant Cell Biology, Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Martonvàsàr H-2462, Hungary.
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De La Fuente GN, Frei UK, Lübberstedt T. Accelerating plant breeding. TRENDS IN PLANT SCIENCE 2013; 18:667-72. [PMID: 24080381 DOI: 10.1016/j.tplants.2013.09.001] [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] [Received: 05/31/2013] [Revised: 08/29/2013] [Accepted: 09/05/2013] [Indexed: 05/18/2023]
Abstract
The growing demand for food with limited arable land available necessitates that the yield of major food crops continues to increase over time. Advances in marker technology, predictive statistics, and breeding methodology have allowed for continued increases in crop performance through genetic improvement. However, one major bottleneck is the generation time of plants, which is biologically limited and has not been improved since the introduction of doubled haploid technology. In this opinion article, we propose to implement in vitro nurseries, which could substantially shorten generation time through rapid cycles of meiosis and mitosis. This could prove a useful tool for speeding up future breeding programs with the aim of sustainable food production.
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Affiliation(s)
- Gerald N De La Fuente
- Department of Agronomy, Iowa State University, 100 Osborn Drive, Ames, IA 50011, USA.
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