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Chupeau MC, Granier F, Pichon O, Renou JP, Gaudin V, Chupeau Y. Characterization of the early events leading to totipotency in an Arabidopsis protoplast liquid culture by temporal transcript profiling. Plant Cell 2013; 25:2444-63. [PMID: 23903317 PMCID: PMC3753376 DOI: 10.1105/tpc.113.109538] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 05/31/2013] [Accepted: 07/03/2013] [Indexed: 05/19/2023]
Abstract
The molecular mechanisms underlying plant cell totipotency are largely unknown. Here, we present a protocol for the efficient regeneration of plants from Arabidopsis thaliana protoplasts. The specific liquid medium used in our study leads to a high rate of reentry into the cell cycle of most cell types, providing a powerful system to study dedifferentiation/regeneration processes in independent somatic cells. To identify the early events in the establishment of totipotency, we monitored the genome-wide transcript profiles of plantlets and protoplast-derived cells (PdCs) during the first week of culture. Plant cells rapidly dedifferentiated. Then, we observed the reinitiation and reorientation of protein synthesis, accompanied by the reinitiation of cell division and de novo cell wall synthesis. Marked changes in the expression of chromatin-associated genes, especially of those in the histone variant family, were observed during protoplast culture. Surprisingly, the epigenetic status of PdCs and well-established cell cultures differed, with PdCs exhibiting rare reactivated transposons and epigenetic changes. The differentially expressed genes identified in this study are interesting candidates for investigating the molecular mechanisms underlying plant cell plasticity and totipotency. One of these genes, the plant-specific transcription factor ABERRANT LATERAL ROOT FORMATION4, is required for the initiation of protoplast division.
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Affiliation(s)
- Marie-Christine Chupeau
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1318–AgroParisTech, Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique–Centre de Versailles-Grignon, F-78026 Versailles cedex, France
| | - Fabienne Granier
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1318–AgroParisTech, Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique–Centre de Versailles-Grignon, F-78026 Versailles cedex, France
| | - Olivier Pichon
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1165, Unité Mixte de Recherche en Génomique Végétale, F-91057 Évry cedex 2, France
| | - Jean-Pierre Renou
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1165, Unité Mixte de Recherche en Génomique Végétale, F-91057 Évry cedex 2, France
| | - Valérie Gaudin
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1318–AgroParisTech, Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique–Centre de Versailles-Grignon, F-78026 Versailles cedex, France
| | - Yves Chupeau
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1318–AgroParisTech, Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique–Centre de Versailles-Grignon, F-78026 Versailles cedex, France
- Address correspondence to
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Tessadori F, Chupeau MC, Chupeau Y, Knip M, Germann S, van Driel R, Fransz P, Gaudin V. Large-scale dissociation and sequential reassembly of pericentric heterochromatin in dedifferentiated Arabidopsis cells. J Cell Sci 2007; 120:1200-8. [PMID: 17376962 DOI: 10.1242/jcs.000026] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Chromocenters in Arabidopsis thaliana are discrete nuclear domains of mainly pericentric heterochromatin. They are characterized by the presence of repetitive sequences, methylated DNA and dimethylated histone H3K9. Here we show that dedifferentiation of specialized mesophyll cells into undifferentiated protoplasts is accompanied by the disruption of chromocenter structures. The dramatic reduction of heterochromatin involves the decondensation of all major repeat regions, also including the centromeric 180 bp tandem repeats. Only the 45S rDNA repeat remained in a partly compact state in most cells. Remarkably, the epigenetic indicators for heterochromatin, DNA methylation and H3K9 dimethylation, did not change upon decondensation. Furthermore, the decondensation of pericentric heterochromatin did not result in transcriptional reactivation of silent genomic elements. The decondensation process was reversible upon prolonged culturing. Strikingly, recondensation of heterochromatin into chromocenters is a stepwise process. Compaction of the tandemly arranged 45S rDNA regions occurs first, followed by the centromeric 180 bp and the 5S rDNA repeats and finally the dispersed repeats, including transposons. The sequence of reassembly seems to be correlated to the size of the repeat domains. Our results indicate that different types of pericentromeric repeats form different types of heterochromatin, which subsequently merge to form a chromocenter.
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Affiliation(s)
- Federico Tessadori
- Nuclear Organization Group, Swammerdam Institute for Life Sciences, University of Amsterdam, BioCentrum Amsterdam, Kruislaan 318, 1098SM Amsterdam, The Netherlands
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Mazier M, Botton E, Flamain F, Bouchet JP, Courtial B, Chupeau MC, Chupeau Y, Maisonneuve B, Lucas H. Successful gene tagging in lettuce using the Tnt1 retrotransposon from tobacco. Plant Physiol 2007; 144:18-31. [PMID: 17351058 PMCID: PMC1913772 DOI: 10.1104/pp.106.090365] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2006] [Accepted: 01/30/2007] [Indexed: 05/14/2023]
Abstract
The tobacco (Nicotiana tabacum) element Tnt1 is one of the few identified active retrotransposons in plants. These elements possess unique properties that make them ideal genetic tools for gene tagging. Here, we demonstrate the feasibility of gene tagging using the retrotransposon Tnt1 in lettuce (Lactuca sativa), which is the largest genome tested for retrotransposon mutagenesis so far. Of 10 different transgenic bushes carrying a complete Tnt1 containing T-DNA, eight contained multiple transposed copies of Tnt1. The number of transposed copies of the element per plant was particularly high, the smallest number being 28. Tnt1 transposition in lettuce can be induced by a very simple in vitro culture protocol. Tnt1 insertions were stable in the progeny of the primary transformants and could be segregated genetically. Characterization of the sequences flanking some insertion sites revealed that Tnt1 often inserted into genes. The progeny of some primary transformants showed phenotypic alterations due to recessive mutations. One of these mutations was due to Tnt1 insertion in the gibberellin 3beta-hydroxylase gene. Taken together, these results indicate that Tnt1 is a powerful tool for insertion mutagenesis especially in plants with a large genome.
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Affiliation(s)
- Marianne Mazier
- Unité de Génétique et d'Amélioration des Fruits et Légumes, UR1502, Institut National de la Recherche Agronomique, F-84143 Montfavet cedex, France.
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Chupeau Y. [Transgenic plants: towards a more balanced nutrition?]. Bull Acad Natl Med 2003; 186:1363-74; discussion 1374-5. [PMID: 12669356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Over the past ten years, the knowledge of metabolic capabilities of plants have been considerably expanded. Combined with technical achievements in gene transfer, the understanding of metabolic regulation provide new means, which are more and more precise and targeted, for modifying plant products towards improving health and well being through diet. Yet, a great number of attempts to modify plant metabolism are still purely exploratory. However, some key applications are emerging as well for macronutrients that for micronutrients.
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Affiliation(s)
- Yves Chupeau
- INRA Versailles-Grignon, Biologie Cellulaire, route de Saint-Cyr, 78026 Versailles
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Chupeau Y. [Transgenic plants: towards a more balanced diet?]. Ann Pharm Fr 2003; 61:78-85; discussion 85-6. [PMID: 12668945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Over the past ten years, knowledge of the metabolic capacities of plants has expanded considerably. Combined with technical achievements in gene transfer, a better understanding of metabolic regulation provides new more precise and targeted means of modifying plant products in order to improve health and well being through diet. While a great number of attempts to modify plant metabolism are still in the exploratory phase, some key applications are emerging with applications involving micro and macronutrients.
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Affiliation(s)
- Y Chupeau
- INRA, Versailles-Grignon, Biologie Cellulaire, route de Saint-Cyr, F 78026 Versailles Cedex
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Djennane S, Chauvin JE, Quilleré I, Meyer C, Chupeau Y. Introduction and expression of a deregulated tobacco nitrate reductase gene in potato lead to highly reduced nitrate levels in transgenic tubers. Transgenic Res 2002; 11:175-84. [PMID: 12054351 DOI: 10.1023/a:1015299711171] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Twenty transformed Solanum tuberosum plants issued from five different varieties and carrying a chimeric tobacco nitrate reductase gene (a truncated tobacco Nia2 coding sequence fused to the CaMV 35S promoter) were cultivated in field conditions at INRA Ploudaniel in 1999 and 2000. In 60% of the transgenic plants, the presence of the tobacco Nia2 transcript was detected by RT-PCR. These clones exhibited a drastic decrease in the nitrate content in tubers. Indeed the nitrate content decreased by about 95% in the tubers of transformed plants compared to nontransformed potato plants from the same variety. This decrease was correlated with a modified regulation of NR expression as revealed by a higher chlorate sensitivity of these transgenic lines. Two methods of nitrate content determination in tubers were also compared and were found to give similar results.
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Affiliation(s)
- Samia Djennane
- Station d'Amélioration de la Pomme de terre et des Plantes à Bulbes, INRA, Ploudaniel, France
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Riba G, Chupeau Y. Genetically modified plants: the stakes. Cell Mol Biol (Noisy-le-grand) 2001; 47:1319-28. [PMID: 11838952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Generically modified plants (GMP) are massively used on the American continent in Australia and in China, since they represent an unquestionable potential for progress. New attributes are therefore devoted to the human and animal diet, to the facilitating of culture management, to the reducing of the chemical fertilizer and pesticide usage, and to the conquest of new cultural spaces. Considering itself to be flawed by a too hasty plunge into the market, concomitant with sagging evaluations of other innovations, Europe is confronted by a strong societal debate which blocks GMP cultures and orientates the research towards an evaluation of the environmental and public health risks and an evaluation of their economical and sociological impacts. The authors encourage this societal debate in order to arbitrate the presence of transgenes in conventional productions and products, to define the accepted rules of responsibility, to decide what is not acceptable, and to involve the more upstream actors and operators of the innovation process, all that keeping in mind the agronomical, ecological and economical repercussions of their decisions.
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Affiliation(s)
- G Riba
- Scientific Direction Plant and Plant Products, INRA, Paris, France.
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Chupeau Y. Les raffinements sexuels d'une bactérie du sol... au service du génie génétique. Med Sci (Paris) 2001. [DOI: 10.4267/10608/2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Daubresse N, Chupeau Y, Francesch C, Lapierre C, Pollet B, Rolando C. Rational design, synthesis and biological evaluation of the first inhibitor of lignin polymerization. Chem Commun (Camb) 1997. [DOI: 10.1039/a702464i] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Desprez B, Chupeau MC, Vermeulen A, Delbreil B, Chupeau Y, Bourgin JP. Regeneration and characterization of plants produced from mature tobacco pollen protoplasts via gametosomatic hybridization. Plant Cell Rep 1995; 14:204-209. [PMID: 24190296 DOI: 10.1007/bf00233634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/1994] [Revised: 07/18/1994] [Indexed: 06/02/2023]
Abstract
Mature pollen protoplasts (n) isolated from kanamycin resistant plants of Nicotiana tabacum (2n = 4x = 48) were fused with somatic mesophyll protoplasts (2n) of Nicotiana plumbaginifolia (2n = 20) to produce plants. A total of 3.6·10(6) mature pollen protoplasts were fused with 7·10(6) mesophyll protoplasts using a PEG/Ca(2+) method. Mature pollen protoplasts did not divide in our culture conditions, and N. plumbaginifolia protoplasts stopped dividing when the protoplast-derived colonies were transferred to a selection medium containing paromomycine (20 mg·l(-1)). A total of 133 actively growing colonies were recovered on the selection medium containing kanamycin (100 mg·l(-1)). Plants from twenty resulting cell lines were confirmed as hybrids (17) or cybrids (3) based on leaf and floral morphology and fertility analysis. Isozyme pattern analysis confirmed the nuclear hybrid and cybrid nature, respectively, for 2 and 3 typical gametosomatic selected plants. Root tip squashes of 6 of the gametosomatic hybrid plants revealed chromosome numbers ranging from 44 to 68; the 3 selected cybrid plants had 48 chromosomes. Evidence for organelle transmission from the mesophyll partner in the gametosomatic plants is shown. From the analysis it can be concluded that the gametosomatic fusion involving mature pollen protoplasts (n) carrying a dominant selection marker can be convenient for synthesis of either hybrids or cybrids. Such gametosomatic fusion is therefore considered as a new approach towards the production of androgenetic plants with a choosen cytoplasm.
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Affiliation(s)
- B Desprez
- Florimond Desprez, B.P. 41, F-59242, Cappelle-en-Pévèle, France
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Desprez B, Chupeau Y, Bourgin JP. Preparation and fusion properties of protoplasts from mature pollen of Nicotiana tabacum. Plant Cell Rep 1995; 14:199-203. [PMID: 24190295 DOI: 10.1007/bf00233633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/1994] [Revised: 07/18/1994] [Indexed: 06/02/2023]
Abstract
A method to remove the exine from mature tobacco pollen and to release numerous intact pollen protoplasts has been developed. Post-anthesis binucleate pollen was treated with water, buffered with MES at pH 5.5, for two hours. Rupture of the exine was caused by the force of pollen hydration exposing the intine to subsequent enzymatic maceration. The high osmotic pressure (1000 mOsm·kg(-1) H2O) of pollen protoplasts required a special maceration medium, 4% KCl (w/v). Action of an enzyme solution containing 1% (w/v) Macerozyme and 1% (w/v) Cellulase gave rise to viable protoplasts within 4 hours. When cultured in a tobacco mesophyll protoplast culture medium, the pollen protoplasts underwent regeneration of a cell wall, formation of various tube-shaped structures, and division of the generative nucleus into two nuclei. Using a PEG/Ca(2+) method pollen protoplasts were fused with diploid mesophyll protoplasts. Evidence of transfer of chloroplasts into the pollen protoplasts was observed after one day of culture.
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Affiliation(s)
- B Desprez
- Florimond Desprez, B.P. 41, F-59242, Cappelle-en-Pévèle, France
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Bretagne B, Chupeau MC, Chupeau Y, Fouilloux G. Improved flax regeneration from hypocotyls using thidiazuron as a cytokinin source. Plant Cell Rep 1994; 14:120-124. [PMID: 24192878 DOI: 10.1007/bf00233774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/1994] [Revised: 05/19/1994] [Indexed: 06/02/2023]
Abstract
The effects of thidiazuron, benzyladenine and zeatin were tested with respect to bud regeneration of different flax explants from hypocotyls, cotyledons and apices of two fibre varieties (Ariane, Viking) and one linseed variety (Antarès). These three cytokinins were tested either alone or in combination with naphthalene acetic acid, indole acetic acid or 2,4-dichlorophenoxyacetic acid.Hypocotyls were the most responsive explants. Thidiazuron was significantly the most effective followed by benzyladenine, and then zeatin, in inducing organogenesis from hypocotyl segments. The optimal thidiazuron concentration for bud regeneration from hypocotyls was 0.1-0.3 μM in combination with 0.01 μM of naphthalene acetic acid. Six days after plating, shoot initials began to appear on hypocotyl sections compared with ten to fifteen days when using benzyladenine or zeatin.
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Affiliation(s)
- B Bretagne
- Laboratoire de Biologie Cellulaire, INRA, Route de Saint-Cyr, 78026, Versailles Cedex, France
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Chupeau MC, Maisonneuve B, Bellec Y, Chupeau Y. A Lactuca universal hybridizer, and its use in creation of fertile interspecific somatic hybrids. Mol Gen Genet 1994; 245:139-45. [PMID: 7816020 DOI: 10.1007/bf00283260] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A Lactuca sativa cv. Ardente line heterozygous for a gene encoding resistance to kanamycin, a positive and dominant trait, was crossed with cv. Girelle, which is heterozygous for a recessive albinism marker. The resulting seeds yielded 25% albino seedlings, of which 50% were also resistant to kanamycin. Such plantlets (KR, a) grown in vitro were used for preparation of universal hybridizer protoplasts, since green buds that can develop on kanamycin containing-medium should result from fusion with any wild-type protoplast. To test the practicability of this selection scheme, we fused L. sativa KR, a protoplasts with protoplasts derived from various wild Lactuca as well as various other related species. Protoplast-derived cell colonies were selected for resistance to kanamycin at the regeneration stage. Green buds were regenerated after fusion with protoplasts of L. tatarica and of L. perennis. So far, 9 interspecific hybrid plants have been characterized morphologically. In addition, random amplified polymorphic DNA (RAPD) analysis with selected primers confirmed that these plants are indeed interspecific hybrids. Some plants are female-fertile and production of backcross progenies with L. sativa is in progress. Since many desirable traits such as resistances to viruses, bacteria and fungi (Bremia lactucae) have been characterized in wild Lactuca species, the use of somatic hybridization in breeding programmes now appears a practical possibility.
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Affiliation(s)
- M C Chupeau
- Laboratoire de Biologie Cellulaire and Station de Génétique et d'Amélioration des plantes, INRA Centre de Versailles, France
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Dorlhac de Borne F, Vincentz M, Chupeau Y, Vaucheret H. Co-suppression of nitrate reductase host genes and transgenes in transgenic tobacco plants. Mol Gen Genet 1994; 243:613-21. [PMID: 8028577 DOI: 10.1007/bf00279570] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Constructs carrying the entire or part of the tobacco nitrate reductase cDNA (NIA) cloned between the promoter and terminator sequences of the 35S RNA of the cauliflower mosaic virus were introduced into tobacco, in an attempt to improve nitrate assimilation. Several transgenic plants that had elevated NIA mRNA and nitrate reductase (NR) activity were obtained. In addition, a few plants that exhibited a chlorotic phenotype characteristic of NR-deficient mutants were also obtained. One of these plants contained no NIA mRNA, no NR activity and accumulated nitrate. This phenotype was therefore assumed to result from co-suppression of 35S-NIA transgenes and host NIA genes. NR-deficient plants were also found among the progeny of transformants overexpressing NIA mRNA. Genetic analyses indicated that these NR-deficient plants were homozygous for the 35S-NIA transgene, although not all homozygous plants were deficient for NR. The ratio of normal to NR-deficient plants in the progeny of homozygous plants remained constant at each generation, irrespective of the state of expression of the NIA genes (active or inactive) in the previous generation. This ratio also remained unchanged when field trials were performed in two areas of France: Versailles and Bergerac. The analysis of homozygous plants revealed that co-suppression was reversible at some stage of sexual reproduction. Indeed, host genes and transgenes reactivated at each generation, and co-suppression always appeared after a lag period of normal growth, suggesting that the phenomenon is developmentally regulated.(ABSTRACT TRUNCATED AT 250 WORDS)
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MESH Headings
- Caulimovirus/genetics
- Cloning, Molecular
- Fertilizers
- Gene Expression Regulation
- Genes, Plant/genetics
- Genes, Viral/genetics
- Light
- Nitrate Reductase
- Nitrate Reductases/genetics
- Nitrates/metabolism
- Plants, Genetically Modified/genetics
- Plants, Toxic
- Promoter Regions, Genetic/genetics
- RNA, Viral/genetics
- Suppression, Genetic
- Terminator Regions, Genetic/genetics
- Nicotiana/genetics
- Nicotiana/growth & development
- Nicotiana/radiation effects
- Transformation, Genetic
- Water/metabolism
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Hamza S, Camilleri C, Pollien JM, Vaucheret H, Bourgin JP, Chupeau Y. Selection for spontaneous tomato haploids using a conditional lethal marker. Theor Appl Genet 1993; 86:657-664. [PMID: 24193773 DOI: 10.1007/bf00222653] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/1992] [Accepted: 12/01/1992] [Indexed: 06/02/2023]
Abstract
We describe a method for the isolation of spontaneous haploid tomato plants from greenhousegrown seedlings obtained from crosses involving a transgenic parental line in which a counter-selectionable chimeric gene has been introduced. Transgenic seeds transformed with the aux2 gene, a gene of Agrobacterium rhizogenes that transforms naphthalene acetamide (NAM) into naphthalene acetic acid (NAA), did not develop roots in the presence of NAM, whereas wildtype tomato seeds developed a normal rooting system in its presence. Transgenic plants homozygous for aux2 (cv 'UC82b') were used to pollinate male-sterile (ms322) tomato plants (cv 'Apedice'). Using NAM as a toxic substrate to kill heterozygous diploid plants carrying aux2, we selected for three maternal haploid plants resulting from the development of the female nucleus without fertilization. Maternal haploid selection using the aux2 marker was less efficient than the visual screening of haploid plants displaying recessive morphological markers of the female parent, but provided evidence for the feasibility of haploid selection in species for which no morphological markers are available.
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Affiliation(s)
- S Hamza
- Laboratory of Molecular Biology, INRA, F-78026, Versailles Cedex, France
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Lefrançois C, Chupeau Y, Bourgin JP. Sexual and somatic hybridization in the genusLycopersicon. Theor Appl Genet 1993; 86:533-546. [PMID: 24193700 DOI: 10.1007/bf00838706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/1992] [Accepted: 11/11/1992] [Indexed: 06/02/2023]
Abstract
In recent years, a large number of reports have been published on the recovery of somatic hybrids in the genusLycopersicon and their potential use as a tool in plant breeding programs. Somatic hybridization as a way of enabling the incompatibility barriers which exist within the genusLycopersicon to be bypassed has attracted great interest. WildLycopersicon species harbor numerous interesting agronomic characteristics, which could be transferred to tomato by somatic hybridization. In particular, the production of asymmetric hybrids is explored as an approach to obtain the transfer of only a part of the nuclear genome of wildLycopersicon species. Considerable information is available on the fate of chloroplasts and mitochondria in fusion products inLycopersicon, and unfortunately, cybridization (transfer of chloroplasts and/or mitochondria) seems often difficult to achieve.
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Affiliation(s)
- C Lefrançois
- Laboratoire de Biologie Cellulaire, INRA, route de Saint-Cyr, F-78026, Versailles Cédex, France
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Vermeulen A, Vaucheret H, Pautot V, Chupeau Y. Agrobacterium mediated transfer of a mutant Arabidopsis acetolactate synthase gene confers resistance to chlorsulfuron in chicory (Cichorium intybus L.). Plant Cell Rep 1992; 11:243-247. [PMID: 24203132 DOI: 10.1007/bf00235074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/1992] [Revised: 03/06/1992] [Indexed: 06/02/2023]
Abstract
Leaf discs of C. intybus were inoculated with an Agrobacterium tumefaciens strain harboring a neomycin phosphotransferase (neo) gene for kanamycin resistance and a mutant acetolactate synthase gene (csr1-1) from Arabidopsis thaliana conferring resistance to sulfonylurea herbicides. A regeneration medium was optimized which permitted an efficient shoot regeneration from leaf discs. Transgenic shoots were selected on rooting medium containing 100 mg/l kanamycin sulfate. Integration of the csr1-1 gene into genomic DNA of kanamycin resistant chicory plants was confirmed by Southern blot hybridizations. Analysis of the selfed progenies (S1 and S2) of two independent transformed clones showed that kanamycin and chlorsulfuron resistances were inherited as dominant Mendelian traits. The method described here for producing transformed plants will allow new opportunities for chicory breeding.
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Affiliation(s)
- A Vermeulen
- Laboratoire de Biologie Cellulaire, INRA, F-78026, Versailles Cedex, France
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Crepy L, Chupeau MC, Chupeau Y. The Isolation and Culture of Leaf Protoplasts of Cichorium intybus and Their Regeneration into Plants. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/s0044-328x(82)80098-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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