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Haelterman L, Louvieaux J, Chiodi C, Bouchet AS, Kupcsik L, Stahl A, Rousseau-Gueutin M, Snowdon R, Laperche A, Nesi N, Hermans C. Genetic control of root morphology in response to nitrogen across rapeseed diversity. Physiol Plant 2024; 176:e14315. [PMID: 38693794 DOI: 10.1111/ppl.14315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 04/03/2024] [Accepted: 04/11/2024] [Indexed: 05/03/2024]
Abstract
Rapeseed (Brassica napus L.) is an oil-containing crop of great economic value but with considerable nitrogen requirement. Breeding root systems that efficiently absorb nitrogen from the soil could be a driver to ensure genetic gains for more sustainable rapeseed production. The aim of this study is to identify genomic regions that regulate root morphology in response to nitrate availability. The natural variability offered by 300 inbred lines was screened at two experimental locations. Seedlings grew hydroponically with low or elevated nitrate levels. Fifteen traits related to biomass production and root morphology were measured. On average across the panel, a low nitrate level increased the root-to-shoot biomass ratio and the lateral root length. A large phenotypic variation was observed, along with important heritability values and genotypic effects, but low genotype-by-nitrogen interactions. Genome-wide association study and bulk segregant analysis were used to identify loci regulating phenotypic traits. The first approach nominated 319 SNPs that were combined into 80 QTLs. Three QTLs identified on the A07 and C07 chromosomes were stable across nitrate levels and/or experimental locations. The second approach involved genotyping two groups of individuals from an experimental F2 population created by crossing two accessions with contrasting lateral root lengths. These individuals were found in the tails of the phenotypic distribution. Co-localized QTLs found in both mapping approaches covered a chromosomal region on the A06 chromosome. The QTL regions contained some genes putatively involved in root organogenesis and represent selection targets for redesigning the root morphology of rapeseed.
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Affiliation(s)
- Loïc Haelterman
- Crop Production and Biostimulation Laboratory (CPBL), Brussels Bioengineering School, Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Julien Louvieaux
- Crop Production and Biostimulation Laboratory (CPBL), Brussels Bioengineering School, Université libre de Bruxelles (ULB), Brussels, Belgium
- Laboratory of Applied Plant Ecophysiology, Haute Ecole Provinciale de Hainaut Condorcet, Centre pour l'Agronomie et l'Agro-industrie de la Province de Hainaut (CARAH), Belgium
| | - Claudia Chiodi
- Crop Production and Biostimulation Laboratory (CPBL), Brussels Bioengineering School, Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Anne-Sophie Bouchet
- Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), Institut Agro, Université de Rennes, Le Rheu, France
| | - Laszlo Kupcsik
- Crop Production and Biostimulation Laboratory (CPBL), Brussels Bioengineering School, Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Andreas Stahl
- Julius Kühn Institute (JKI), Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Quedlinburg, Germany
| | - Mathieu Rousseau-Gueutin
- Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), Institut Agro, Université de Rennes, Le Rheu, France
| | - Rod Snowdon
- Department of Plant Breeding, IFZ Research Centre for Biosystems, Land Use and Nutrition, Justus Liebig University, Germany
| | - Anne Laperche
- Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), Institut Agro, Université de Rennes, Le Rheu, France
| | - Nathalie Nesi
- Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), Institut Agro, Université de Rennes, Le Rheu, France
| | - Christian Hermans
- Crop Production and Biostimulation Laboratory (CPBL), Brussels Bioengineering School, Université libre de Bruxelles (ULB), Brussels, Belgium
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2
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Bianchetti G, Clouet V, Legeai F, Baron C, Gazengel K, Carrillo A, Manzanares-Dauleux MJ, Buitink J, Nesi N. RNA sequencing data for responses to drought stress and/or clubroot infection in developing seeds of Brassica napus. Data Brief 2021; 38:107392. [PMID: 34611536 PMCID: PMC8477133 DOI: 10.1016/j.dib.2021.107392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 11/17/2022] Open
Abstract
Oilseed rape (Brassica napus L.) is the third largest oil crop worldwide. Like other crops, oilseed rape faces unfavorable environmental conditions resulting from multiple and combined actions of abiotic and biotic constraints that occur throughout the growing season. In particular drought severely reduces seed yield but also impacts seed quality in oilseed rape. In addition, clubroot disease, caused by the pathogen Plasmodiophora brassicae, limits the yield of the oilseed rape crops grown in infected areas. Clubroot induces swellings or galls on the roots that decrease the flow of water and nutrients within the plant. Furthermore, combinations of different stresses lead to complex plant responses that can not be predicted by the simple addition of individual stress responses. Indeed, an abiotic constraint can either reduce or stimulate the plant response to a pathogen or pest. Transcriptome datasets from different conditions are key resources to improve our knowledge of environmental stress-resistance mechanisms in plant organs. Here, we describe a RNA-seq dataset consisting of 72 samples of immature B. napus seeds from plants grown either under drought, infected with P. brassicae, or a combination of both stresses. A total of 67.6 Gb of transcriptome paired-end reads were filtered, mapped onto the B. napus reference genome Darmor-bzh and used for identification of differentially expressed genes and gene ontology enrichment. The raw reads are available under accession PRJNA738318 at NCBI Sequence Read Archive (SRA) repository. The dataset is a resource for the scientific community exploring seed plasticity.
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Affiliation(s)
- Grégoire Bianchetti
- IGEPP, INRAE, Institut Agro, Université de Rennes 1, BP35327, Le Rheu 35650, France
| | - Vanessa Clouet
- IGEPP, INRAE, Institut Agro, Université de Rennes 1, BP35327, Le Rheu 35650, France
| | - Fabrice Legeai
- IGEPP, INRAE, Institut Agro, Université de Rennes 1, BP35327, Le Rheu 35650, France
| | - Cécile Baron
- IGEPP, INRAE, Institut Agro, Université de Rennes 1, BP35327, Le Rheu 35650, France
| | - Kévin Gazengel
- IGEPP, INRAE, Institut Agro, Université de Rennes 1, BP35327, Le Rheu 35650, France
| | - Aurélien Carrillo
- IGEPP, INRAE, Institut Agro, Université de Rennes 1, BP35327, Le Rheu 35650, France
| | | | - Julia Buitink
- IRHS, INRAE, Institut Agro, Université d'Angers, SFR4207 QuaSaV, Beaucouzé 49070, France
| | - Nathalie Nesi
- IGEPP, INRAE, Institut Agro, Université de Rennes 1, BP35327, Le Rheu 35650, France
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3
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Bianchetti G, Baron C, Carrillo A, Berardocco S, Marnet N, Wagner MH, Demilly D, Ducournau S, Manzanares-Dauleux MJ, Cahérec FL, Buitink J, Nesi N. Dataset for the metabolic and physiological characterization of seeds from oilseed rape ( Brassica napus L.) plants grown under single or combined effects of drought and clubroot pathogen Plasmodiophora brassicae. Data Brief 2021; 37:107247. [PMID: 34277900 PMCID: PMC8267568 DOI: 10.1016/j.dib.2021.107247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/21/2021] [Accepted: 06/24/2021] [Indexed: 11/20/2022] Open
Abstract
Faced with the challenges of adapting agriculture to climate change, seed production should have increased resilience to abiotic stress factors and the expected proliferation of pathogens. This concerns both the nutritional quality and seed vigor, two crucial factors in seedling establishment and yield. Both qualities are acquired during seed development, but how environment influences the genetic and physiological determinisms of these qualities remains to be elucidated. With a world production of 71 Mt of seeds per year, oilseed rape (Brassica napus) is the third largest oleaginous crop. But its productivity must cope with several abiotic stresses, among which drought is one of the main constraints in current and future climate scenarios. In addition, clubroot disease, caused by the pathogen Plasmodiophora brassicae, leads to severe yield losses for the Brassica crops worldwide. Clubroot provokes the formation of galls on the infected roots that can restrict the flow of water and nutrients within the plant throughout the growth cycle. In order to get new insights into the impact of single or combined constraints on seed qualities, metabolic profiling assays were run for a collection of 330 seed samples (including developing, mature and imbibed seeds) harvested from plants of two B. napus cultivars ("Express" and "Montego") that were grown under either drought conditions, the presence of P. brassicae, or a combination of both stresses. Metabolites were identified and quantified by UPLC or GC. In addition, monitoring germination traits was conducted for 60 mature seed lots under in vitro conditions using an automated phenotyping platform. The present dataset contains the raw contents for 42 metabolites (nmol.mg-1 of seed dry weight) filtered and analyzed with statistical tests as well as germination speed and percentages. This dataset is available under accession at Data INRAE. These data will contribute to a better understanding of the crosstalk between the plant responses to water deprivation and/or pathogen attack and how it compromises seed quality. A better understanding of the molecular and physiological responses of the seed to (a)biotic stress on a molecular and physiological will be a first step to meet scientific and technological challenges of adapting seeds to their environment.
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Affiliation(s)
| | - Cécile Baron
- IGEPP, INRAE, Institut Agro, Univ. Rennes 1, Le Rheu 35650, France
| | | | | | | | | | - Didier Demilly
- GEVES, Station Nationale d'Essais de Semences, Beaucouzé 49070, France
| | - Sylvie Ducournau
- GEVES, Station Nationale d'Essais de Semences, Beaucouzé 49070, France
| | | | | | - Julia Buitink
- IRHS, INRAE, Institut Agro, Univ. Angers, SFR4207 QuaSaV, Beaucouzé 49070, France
| | - Nathalie Nesi
- IGEPP, INRAE, Institut Agro, Univ. Rennes 1, Le Rheu 35650, France
- Corresponding author.
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4
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Blary A, Gonzalo A, Eber F, Bérard A, Bergès H, Bessoltane N, Charif D, Charpentier C, Cromer L, Fourment J, Genevriez C, Le Paslier MC, Lodé M, Lucas MO, Nesi N, Lloyd A, Chèvre AM, Jenczewski E. Corrigendum: FANCM Limits Meiotic Crossovers in Brassica Crops. Front Plant Sci 2020; 11:604728. [PMID: 33343604 PMCID: PMC7747853 DOI: 10.3389/fpls.2020.604728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 10/27/2020] [Indexed: 06/12/2023]
Abstract
[This corrects the article DOI: 10.3389/fpls.2018.00368.].
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Affiliation(s)
- Aurélien Blary
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Adrián Gonzalo
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Frédérique Eber
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Aurélie Bérard
- EPGV US 1279, Institut National de la Recherche Agronomique, CEA-IG-CNG, Université Paris-Saclay, Evry, France
| | - Hélène Bergès
- Institut National de la Recherche Agronomique UPR 1258, Centre National des Ressources Génomiques Végétales, Castanet-Tolosan, France
| | - Nadia Bessoltane
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Delphine Charif
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Catherine Charpentier
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Laurence Cromer
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Joelle Fourment
- Institut National de la Recherche Agronomique UPR 1258, Centre National des Ressources Génomiques Végétales, Castanet-Tolosan, France
| | - Camille Genevriez
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Marie-Christine Le Paslier
- EPGV US 1279, Institut National de la Recherche Agronomique, CEA-IG-CNG, Université Paris-Saclay, Evry, France
| | - Maryse Lodé
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Marie-Odile Lucas
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Nathalie Nesi
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Andrew Lloyd
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Anne-Marie Chèvre
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Eric Jenczewski
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
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5
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Boter M, Calleja-Cabrera J, Carrera-Castaño G, Wagner G, Hatzig SV, Snowdon RJ, Legoahec L, Bianchetti G, Bouchereau A, Nesi N, Pernas M, Oñate-Sánchez L. An Integrative Approach to Analyze Seed Germination in Brassica napus. Front Plant Sci 2019; 10:1342. [PMID: 31708951 PMCID: PMC6824160 DOI: 10.3389/fpls.2019.01342] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 09/26/2019] [Indexed: 05/23/2023]
Abstract
Seed germination is a complex trait determined by the interaction of hormonal, metabolic, genetic, and environmental components. Variability of this trait in crops has a big impact on seedling establishment and yield in the field. Classical studies of this trait in crops have focused mainly on the analyses of one level of regulation in the cascade of events leading to seed germination. We have carried out an integrative and extensive approach to deepen our understanding of seed germination in Brassica napus by generating transcriptomic, metabolic, and hormonal data at different stages upon seed imbibition. Deep phenotyping of different seed germination-associated traits in six winter-type B. napus accessions has revealed that seed germination kinetics, in particular seed germination speed, are major contributors to the variability of this trait. Metabolic profiling of these accessions has allowed us to describe a common pattern of metabolic change and to identify the levels of malate and aspartate metabolites as putative metabolic markers to estimate germination performance. Additionally, analysis of seed content of different hormones suggests that hormonal balance between ABA, GA, and IAA at crucial time points during this process might underlie seed germination differences in these accessions. In this study, we have also defined the major transcriptome changes accompanying the germination process in B. napus. Furthermore, we have observed that earlier activation of key germination regulatory genes seems to generate the differences in germination speed observed between accessions in B. napus. Finally, we have found that protein-protein interactions between some of these key regulator are conserved in B. napus, suggesting a shared regulatory network with other plant species. Altogether, our results provide a comprehensive and detailed picture of seed germination dynamics in oilseed rape. This new framework will be extremely valuable not only to evaluate germination performance of B. napus accessions but also to identify key targets for crop improvement in this important process.
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Affiliation(s)
- Marta Boter
- Centro de Biotecnología y Genómica de Plantas, (Universidad Politécnica de Madrid –Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria), Madrid, Spain
| | - Julián Calleja-Cabrera
- Centro de Biotecnología y Genómica de Plantas, (Universidad Politécnica de Madrid –Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria), Madrid, Spain
| | - Gerardo Carrera-Castaño
- Centro de Biotecnología y Genómica de Plantas, (Universidad Politécnica de Madrid –Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria), Madrid, Spain
| | - Geoffrey Wagner
- Department of Plant Breeding, Justus Liebig University Giessen, Giessen, Germany
| | - Sarah Vanessa Hatzig
- Department of Plant Breeding, Justus Liebig University Giessen, Giessen, Germany
| | - Rod J. Snowdon
- Department of Plant Breeding, Justus Liebig University Giessen, Giessen, Germany
| | - Laurie Legoahec
- Joint Laboratory for Genetics, Institute for Genetics, Environment and Plant Protection (IGEPP), Le Rheu, France
| | - Grégoire Bianchetti
- Joint Laboratory for Genetics, Institute for Genetics, Environment and Plant Protection (IGEPP), Le Rheu, France
| | - Alain Bouchereau
- Joint Laboratory for Genetics, Institute for Genetics, Environment and Plant Protection (IGEPP), Le Rheu, France
| | - Nathalie Nesi
- Joint Laboratory for Genetics, Institute for Genetics, Environment and Plant Protection (IGEPP), Le Rheu, France
| | - Mónica Pernas
- Centro de Biotecnología y Genómica de Plantas, (Universidad Politécnica de Madrid –Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria), Madrid, Spain
| | - Luis Oñate-Sánchez
- Centro de Biotecnología y Genómica de Plantas, (Universidad Politécnica de Madrid –Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria), Madrid, Spain
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6
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Hatzig S, Breuer F, Nesi N, Ducournau S, Wagner MH, Leckband G, Abbadi A, Snowdon RJ. Hidden Effects of Seed Quality Breeding on Germination in Oilseed Rape ( Brassica napus L.). Front Plant Sci 2018; 9:419. [PMID: 29666629 PMCID: PMC5891602 DOI: 10.3389/fpls.2018.00419] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 03/16/2018] [Indexed: 05/19/2023]
Abstract
Intense selection for specific seed qualities in winter oilseed rape breeding has had an inadvertent negative influence on seed germination performance. In a panel of 215 diverse winter oilseed rape varieties spanning over 50 years of breeding progress in winter-type rapeseed, we found that low seed erucic acid content and reduced seed glucosinolate content were significantly related with prolonged germination time. Genome-wide association mapping revealed that this relationship is caused by linkage drag between important loci for seed quality and germination traits. One QTL for mean germination time on chromosome A09 co-localized with significant but minor QTL for both seed erucic acid and seed glucosinolate content. This suggested either potential pleiotropy or close linkage of minor factors influencing all three traits. Therefore, a reduction in germination performance may be due to inadvertent co-selection of genetic variants associated with 00 seed quality that have a negative influence on germination. Our results suggest that marker-assisted selection of positive alleles for mean germination time within the modern quality pool can help breeders to maintain maximal germination capacity in new 00-quality oilseed rape cultivars.
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Affiliation(s)
- Sarah Hatzig
- Department of Plant Breeding, Justus-Liebig University of Giessen, Giessen, Germany
| | | | - Nathalie Nesi
- Institute for Genetics, Environment and Plant Protection, Le Rheu, France
| | - Sylvie Ducournau
- Groupe d’Etude et de Contrôle des Variétés et des Semences, Beaucouzé, France
| | - Marie-Helene Wagner
- Groupe d’Etude et de Contrôle des Variétés et des Semences, Beaucouzé, France
| | | | | | - Rod J. Snowdon
- Department of Plant Breeding, Justus-Liebig University of Giessen, Giessen, Germany
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7
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Blary A, Gonzalo A, Eber F, Bérard A, Bergès H, Bessoltane N, Charif D, Charpentier C, Cromer L, Fourment J, Genevriez C, Le Paslier MC, Lodé M, Lucas MO, Nesi N, Lloyd A, Chèvre AM, Jenczewski E. FANCM Limits Meiotic Crossovers in Brassica Crops. Front Plant Sci 2018; 9:368. [PMID: 29628933 PMCID: PMC5876677 DOI: 10.3389/fpls.2018.00368] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 03/06/2018] [Indexed: 05/18/2023]
Abstract
Meiotic crossovers (COs) are essential for proper chromosome segregation and the reshuffling of alleles during meiosis. In WT plants, the number of COs is usually small, which limits the genetic variation that can be captured by plant breeding programs. Part of this limitation is imposed by proteins like FANCM, the inactivation of which results in a 3-fold increase in COs in Arabidopsis thaliana. Whether the same holds true in crops needed to be established. In this study, we identified EMS induced mutations in FANCM in two species of economic relevance within the genus Brassica. We showed that CO frequencies were increased in fancm mutants in both diploid and tetraploid Brassicas, Brassica rapa and Brassica napus respectively. In B. rapa, we observed a 3-fold increase in the number of COs, equal to the increase observed previously in Arabidopsis. In B. napus we observed a lesser but consistent increase (1.3-fold) in both euploid (AACC) and allohaploid (AC) plants. Complementation tests in A. thaliana suggest that the smaller increase in crossover frequency observed in B. napus reflects residual activity of the mutant C copy of FANCM. Altogether our results indicate that the anti-CO activity of FANCM is conserved across the Brassica, opening new avenues to make a wider range of genetic diversity accessible to crop improvement.
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Affiliation(s)
- Aurélien Blary
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Adrián Gonzalo
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Frédérique Eber
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Aurélie Bérard
- EPGV US 1279, Institut National de la Recherche Agronomique, CEA-IG-CNG, Université Paris-Saclay, Evry, France
| | - Hélène Bergès
- Institut National de la Recherche Agronomique UPR 1258, Centre National des Ressources Génomiques Végétales, Castanet-Tolosan, France
| | - Nadia Bessoltane
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Delphine Charif
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Catherine Charpentier
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Laurence Cromer
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Joelle Fourment
- Institut National de la Recherche Agronomique UPR 1258, Centre National des Ressources Génomiques Végétales, Castanet-Tolosan, France
| | - Camille Genevriez
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Marie-Christine Le Paslier
- EPGV US 1279, Institut National de la Recherche Agronomique, CEA-IG-CNG, Université Paris-Saclay, Evry, France
| | - Maryse Lodé
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Marie-Odile Lucas
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Nathalie Nesi
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Andrew Lloyd
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
| | - Anne-Marie Chèvre
- IGEPP, Institut National de la Recherche Agronomique, Agrocampus Ouest, Université de Rennes 1, Le Rheu, France
| | - Eric Jenczewski
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National De La Recherche Scientifique, Université Paris-Saclay, Versailles, France
- *Correspondence: Eric Jenczewski
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8
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Bouchet AS, Laperche A, Bissuel-Belaygue C, Baron C, Morice J, Rousseau-Gueutin M, Dheu JE, George P, Pinochet X, Foubert T, Maes O, Dugué D, Guinot F, Nesi N. Genetic basis of nitrogen use efficiency and yield stability across environments in winter rapeseed. BMC Genet 2016; 17:131. [PMID: 27628849 PMCID: PMC5024496 DOI: 10.1186/s12863-016-0432-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 08/24/2016] [Indexed: 01/13/2023] Open
Abstract
Background Nitrogen use efficiency is an important breeding trait that can be modified to improve the sustainability of many crop species used in agriculture. Rapeseed is a major oil crop with low nitrogen use efficiency, making its production highly dependent on nitrogen input. This complex trait is suspected to be sensitive to genotype × environment interactions, especially genotype × nitrogen interactions. Therefore, phenotyping diverse rapeseed populations under a dense network of trials is a powerful approach to study nitrogen use efficiency in this crop. The present study aimed to determine the quantitative trait loci (QTL) associated with yield in winter oilseed rape and to assess the stability of these regions under contrasting nitrogen conditions for the purpose of increasing nitrogen use efficiency. Results Genome-wide association studies and linkage analyses were performed on two diversity sets and two doubled-haploid populations. These populations were densely genotyped, and yield-related traits were scored in a multi-environment design including seven French locations, six growing seasons (2009 to 2014) and two nitrogen nutrition levels (optimal versus limited). Very few genotype × nitrogen interactions were detected, and a large proportion of the QTL were stable across nitrogen nutrition conditions. In contrast, strong genotype × trial interactions in which most of the QTL were specific to a single trial were found. To obtain further insight into the QTL × environment interactions, genetic analyses of ecovalence were performed to identify the genomic regions contributing to the genotype × nitrogen and genotype × trial interactions. Fifty-one critical genomic regions contributing to the additive genetic control of yield-associated traits were identified, and the structural organization of these regions in the genome was investigated. Conclusions Our results demonstrated that the effect of the trial was greater than the effect of nitrogen nutrition levels on seed yield-related traits under our experimental conditions. Nevertheless, critical genomic regions associated with yield that were stable across environments were identified in rapeseed. Electronic supplementary material The online version of this article (doi:10.1186/s12863-016-0432-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Anne Laperche
- AGROCAMPUS OUEST, UMR 1349 IGEPP, BP 35327, 35650, le Rheu, France.
| | | | - Cécile Baron
- INRA, UMR 1349 IGEPP, BP 35327, 35650, le Rheu, France
| | - Jérôme Morice
- INRA, UMR 1349 IGEPP, BP 35327, 35650, le Rheu, France
| | | | - Jean-Eric Dheu
- Limagrain Europe, Ferme de l'Etang, 77390, Verneuil-l'Etang, France
| | - Pierre George
- Biogemma, Chemin de Panedautes, 31700, Mondonville, France
| | - Xavier Pinochet
- Terres Inovia, Avenue Lucien Brétignières, 78850, Thiverval Grignon, France
| | - Thomas Foubert
- Euralis, Chemin de Panedautes, 31700, Mondonville, France
| | - Olivier Maes
- Maisadour Semences, Route de Saint Sever, BP27, 40001, Mont de Marsan Cedex, France
| | - Damien Dugué
- RAGT R2n, Rue Emile Singla, BP 3331, 12033, Rodez, France
| | - Florent Guinot
- Syngenta, Chemin de l'Hobit, 31790, Saint-Sauveur, France
| | - Nathalie Nesi
- INRA, UMR 1349 IGEPP, BP 35327, 35650, le Rheu, France
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9
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Boulard C, Bardet M, Chardot T, Dubreucq B, Gromova M, Guillermo A, Miquel M, Nesi N, Yen-Nicolaÿ S, Jolivet P. The structural organization of seed oil bodies could explain the contrasted oil extractability observed in two rapeseed genotypes. Planta 2015; 242:53-68. [PMID: 25820267 DOI: 10.1007/s00425-015-2286-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 03/17/2015] [Indexed: 06/04/2023]
Abstract
The protein, phospholipid and sterol composition of the oil body surface from the seeds of two rapeseed genotypes was compared in order to explain their contrasted oil extractability. In the mature seeds of oleaginous plants, storage lipids accumulate in specialized structures called oil bodies (OBs). These organelles consist of a core of neutral lipids surrounded by a phospholipid monolayer in which structural proteins are embedded. The physical stability of OBs is a consequence of the interactions between proteins and phospholipids. A detailed study of OB characteristics in mature seeds as well as throughout seed development was carried out on two contrasting rapeseed genotypes Amber and Warzanwski. These two accessions were chosen because they differ dramatically in (1) crushing ability, (2) oil extraction yield and, (3) the stability of purified OBs. Warzanwski has higher crushing ability, better oil extraction yield and less stable purified OBs than Amber. OB morphology was investigated in situ using fluorescence microscopy, transmission electron microscopy and pulsed field gradient NMR. During seed development, OB diameter first increased and then decreased 30 days after pollination in both Amber and Warzanwski embryos. In mature seeds, Amber OBs were significantly smaller. The protein, phospholipid and sterol composition of the hemi-membrane was compared between the two accessions. Amber OBs were enriched with H-oleosins and steroleosins, suggesting increased coverage of the OB surface consistent with their higher stability. The nature and composition of phospholipids and sterols in Amber OBs suggest that the hemi-membrane would have a more rigid structure than that of Warzanwski OBs.
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Affiliation(s)
- Céline Boulard
- INRA, Institut Jean-Pierre Bourgin, UMR 1318, ERL CNRS 3559, Saclay Plant Sciences, Versailles, France
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10
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Chiron H, Wilmer J, Lucas MO, Nesi N, Delseny M, Devic M, Roscoe TJ. Regulation of FATTY ACID ELONGATION1 expression in embryonic and vascular tissues of Brassica napus. Plant Mol Biol 2015; 88:65-83. [PMID: 25795129 PMCID: PMC4408364 DOI: 10.1007/s11103-015-0309-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 03/13/2015] [Indexed: 05/09/2023]
Abstract
The expression of the FATTY ACID ELONGATION1 genes was characterised to provide insight into the regulation of very long chain fatty acid (VLCFA) biosynthesis in Brassica napus embryos. Each of the two rapeseed homoeologous genes (Bn-FAE1.1 and Bn-FAE1.2) encoding isozymes of 3-keto-acylCoA synthase, a subunit of the cytoplasmic acyl-CoA elongase complex that controls the production of elongated fatty acids, are expressed predominantly in developing seeds. The proximal regions of the Bn-FAE1.1 and Bn-FAE1.2 promoters possess strong sequence identity suggesting that transcriptional control of expression is mediated by this region which contains putative cis-elements characteristic of those found in the promoters of genes expressed in embryo and endosperm. Histochemical staining of rapeseed lines expressing Bn-FAE1.1 promoter:reporter gene fusions revealed a strong expression in the embryo cotyledon and axis throughout the maturation phase. Quantitative analyses revealed the region, -331 to -149, exerts a major control on cotyledon specific expression and the level of expression. A second region, -640 to -475, acts positively to enhance expression levels and extends expression of Bn-FAE1.1 into the axis and hypocotyl but also acts negatively to repress expression in the root meristem. The expression of the Bn-FAE1.1 gene was not restricted to the seed but was also detected in the vascular tissues of germinating seedlings and mature plants in the fascicular cambium tissue present in roots, stem and leaf petiole. We propose that Bn-FAE1.1 expression in vascular tissue may contribute VLCFA for barrier lipid synthesis and reflects the ancestral function of FAE1 encoded 3-keto-acylCoA synthase.
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Affiliation(s)
- Hélène Chiron
- Laboratoire Genome et Developpement des Plantes, CNRS-UP UMR5096, Université de Perpignan, 52 Avenue Paul Alduy, 66860 Perpignan, France
| | - Jeroen Wilmer
- BIOGEMMA, Chappes Research Centre, Route d’Ennezat, 63720 Chappes, France
| | - Marie-Odile Lucas
- UMR1349 INRA-Agrocampus Ouest-Université de Rennes, Institut de Génétique, Environnement et Protection des Plantes, BP 35327, 35653 Le Rheu Cedex, France
| | - Nathalie Nesi
- UMR1349 INRA-Agrocampus Ouest-Université de Rennes, Institut de Génétique, Environnement et Protection des Plantes, BP 35327, 35653 Le Rheu Cedex, France
| | - Michel Delseny
- Laboratoire Genome et Developpement des Plantes, CNRS-UP UMR5096, Université de Perpignan, 52 Avenue Paul Alduy, 66860 Perpignan, France
| | - Martine Devic
- Laboratoire Genome et Developpement des Plantes, CNRS-UP UMR5096, Université de Perpignan, 52 Avenue Paul Alduy, 66860 Perpignan, France
- Present Address: CNRS ERL5300 Epigenetic Regulation and Seed Development Group, IRD UMR232 DIADE, Institute de Recherche pour le Développment, 911 Avenue Agropolis, 34032 Montpellier Cedex 1, France
| | - Thomas J. Roscoe
- Laboratoire Genome et Developpement des Plantes, CNRS-UP UMR5096, Université de Perpignan, 52 Avenue Paul Alduy, 66860 Perpignan, France
- Present Address: CNRS ERL5300 Epigenetic Regulation and Seed Development Group, IRD UMR232 DIADE, Institute de Recherche pour le Développment, 911 Avenue Agropolis, 34032 Montpellier Cedex 1, France
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11
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Girondé A, Etienne P, Trouverie J, Bouchereau A, Le Cahérec F, Leport L, Orsel M, Niogret MF, Nesi N, Carole D, Soulay F, Masclaux-Daubresse C, Avice JC. The contrasting N management of two oilseed rape genotypes reveals the mechanisms of proteolysis associated with leaf N remobilization and the respective contributions of leaves and stems to N storage and remobilization during seed filling. BMC Plant Biol 2015; 15:59. [PMID: 25848818 PMCID: PMC4384392 DOI: 10.1186/s12870-015-0437-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 01/23/2015] [Indexed: 05/02/2023]
Abstract
BACKGROUND Oilseed rape is the third largest oleaginous crop in the world but requires high levels of N fertilizer of which only 50% is recovered in seeds. This weak N use efficiency is associated with a low foliar N remobilization, leading to a significant return of N to the soil and a risk of pollution. Contrary to what is observed during senescence in the vegetative stages, N remobilization from stems and leaves is considered efficient during monocarpic senescence. However, the contribution of stems towards N management and the cellular mechanisms involved in foliar remobilization remain largely unknown. To reach this goal, the N fluxes at the whole plant level from bolting to mature seeds and the processes involved in leaf N remobilization and proteolysis were investigated in two contrasting genotypes (Aviso and Oase) cultivated under ample or restricted nitrate supply. RESULTS During seed filling in both N conditions, Oase efficiently allocated the N from uptake to seeds while Aviso favoured a better N remobilization from stems and leaves towards seeds. Nitrate restriction decreased seed yield and oil quality for both genotypes but Aviso had the best seed N filling. Under N limitation, Aviso had a better N remobilization from leaves to stems before the onset of seed filling. Afterwards, the higher N remobilization from stems and leaves of Aviso led to a higher final N amount in seeds. This high leaf N remobilization is associated with a better degradation/export of insoluble proteins, oligopeptides, nitrate and/or ammonia. By using an original method based on the determination of Rubisco degradation in the presence of inhibitors of proteases, efficient proteolysis associated with cysteine proteases and proteasome activities was identified as the mechanism of N remobilization. CONCLUSION The results confirm the importance of foliar N remobilization after bolting to satisfy seed filling and highlight that an efficient proteolysis is mainly associated with (i) cysteine proteases and proteasome activities and (ii) a fine coordination between proteolysis and export mechanisms. In addition, the stem may act as transient storage organs in the case of an asynchronism between leaf N remobilization and N demand for seed filling.
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Affiliation(s)
- Alexandra Girondé
- />Université de Caen Basse-Normandie, F-14032 Caen, France
- />UCBN, UMR INRA–UCBN 950 Ecophysiologie Végétale, Agronomie & Nutritions N.C.S., F-14032 Caen, France
- />INRA, UMR INRA–UCBN 950 Ecophysiologie Végétale, Agronomie & Nutritions N.C.S., F-14032 Caen, France
| | - Philippe Etienne
- />Université de Caen Basse-Normandie, F-14032 Caen, France
- />UCBN, UMR INRA–UCBN 950 Ecophysiologie Végétale, Agronomie & Nutritions N.C.S., F-14032 Caen, France
- />INRA, UMR INRA–UCBN 950 Ecophysiologie Végétale, Agronomie & Nutritions N.C.S., F-14032 Caen, France
| | - Jacques Trouverie
- />Université de Caen Basse-Normandie, F-14032 Caen, France
- />UCBN, UMR INRA–UCBN 950 Ecophysiologie Végétale, Agronomie & Nutritions N.C.S., F-14032 Caen, France
- />INRA, UMR INRA–UCBN 950 Ecophysiologie Végétale, Agronomie & Nutritions N.C.S., F-14032 Caen, France
| | - Alain Bouchereau
- />INRA, UMR 1349 Institut de Génétique, Environnement et Protection des Plantes, INRA, Agrocampus Ouest, Université de Rennes 1, F-35653 Le Rheu, France
| | - Françoise Le Cahérec
- />INRA, UMR 1349 Institut de Génétique, Environnement et Protection des Plantes, INRA, Agrocampus Ouest, Université de Rennes 1, F-35653 Le Rheu, France
| | - Laurent Leport
- />INRA, UMR 1349 Institut de Génétique, Environnement et Protection des Plantes, INRA, Agrocampus Ouest, Université de Rennes 1, F-35653 Le Rheu, France
| | - Mathilde Orsel
- />INRA, UMR 1349 Institut de Génétique, Environnement et Protection des Plantes, INRA, Agrocampus Ouest, Université de Rennes 1, F-35653 Le Rheu, France
- />UMR 1345 Institut de Recherche en Horticulture et Semences, SFR 4207 QUASAV, PRES L’UNAM, Université d’Angers, F-49045 Angers, France
- />UMR 1345 Institut de Recherche en Horticulture et Semences, AgroCampus-Ouest, F-49045 Angers, France
| | - Marie-Françoise Niogret
- />INRA, UMR 1349 Institut de Génétique, Environnement et Protection des Plantes, INRA, Agrocampus Ouest, Université de Rennes 1, F-35653 Le Rheu, France
| | - Nathalie Nesi
- />INRA, UMR 1349 Institut de Génétique, Environnement et Protection des Plantes, INRA, Agrocampus Ouest, Université de Rennes 1, F-35653 Le Rheu, France
| | - Deleu Carole
- />INRA, UMR 1349 Institut de Génétique, Environnement et Protection des Plantes, INRA, Agrocampus Ouest, Université de Rennes 1, F-35653 Le Rheu, France
| | - Fabienne Soulay
- />Département Adaptation des Plantes à l’Environnement, UMR 1318, INRA, Institut Jean-Pierre Bourgin, RD10, 78026 Versailles, Cedex France
| | - Céline Masclaux-Daubresse
- />Département Adaptation des Plantes à l’Environnement, UMR 1318, INRA, Institut Jean-Pierre Bourgin, RD10, 78026 Versailles, Cedex France
| | - Jean-Christophe Avice
- />Université de Caen Basse-Normandie, F-14032 Caen, France
- />UCBN, UMR INRA–UCBN 950 Ecophysiologie Végétale, Agronomie & Nutritions N.C.S., F-14032 Caen, France
- />INRA, UMR INRA–UCBN 950 Ecophysiologie Végétale, Agronomie & Nutritions N.C.S., F-14032 Caen, France
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12
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Hatzig SV, Frisch M, Breuer F, Nesi N, Ducournau S, Wagner MH, Leckband G, Abbadi A, Snowdon RJ. Genome-wide association mapping unravels the genetic control of seed germination and vigor in Brassica napus. Front Plant Sci 2015; 6:221. [PMID: 25914704 PMCID: PMC4391041 DOI: 10.3389/fpls.2015.00221] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 03/20/2015] [Indexed: 05/18/2023]
Abstract
Rapid and uniform seed germination is a crucial prerequisite for crop establishment and high yield levels in crop production. A disclosure of genetic factors contributing to adequate seed vigor would help to further increase yield potential and stability. Here we carried out a genome-wide association study in order to define genomic regions influencing seed germination and early seedling growth in oilseed rape (Brassica napus L.). A population of 248 genetically diverse winter-type B. napus accessions was genotyped with the Brassica 60k SNP Illumina genotyping array. Automated high-throughput in vitro phenotyping provided extensive data for multiple traits related to germination and early vigor, such as germination speed, absolute germination rate and radicle elongation. The data obtained indicate that seed germination and radicle growth are strongly environmentally dependent, but could nevertheless be substantially improved by genomic-based breeding. Conditions during seed production and storage were shown to have a profound effect on seed vigor, and a variable manifestation of seed dormancy appears to contribute to differences in germination performance in B. napus. Several promising positional and functional candidate genes could be identified within the genomic regions associated with germination speed, absolute germination rate, radicle growth and thousand seed weight. These include B. napus orthologs of the Arabidopsis thaliana genes SNOWY COTYLEDON 1 (SCO1), ARABIDOPSIS TWO-COMPONENT RESPONSE REGULATOR (ARR4), and ARGINYL-t-RNA PROTEIN TRANSFERASE 1 (ATE1), which have been shown previously to play a role in seed germination and seedling growth in A. thaliana.
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Affiliation(s)
- Sarah V. Hatzig
- Department of Plant Breeding, Justus Liebig UniversityGiessen, Germany
| | - Matthias Frisch
- Department of Biometry and Population Genetics, Justus Liebig UniversityGiessen, Germany
| | | | - Nathalie Nesi
- Institute for Genetics, Environment and Plant Protection, INRALe Rheu, France
| | - Sylvie Ducournau
- Groupe d'Etude et de contrôle des Variétés Et des SemencesBeaucouzé, France
| | | | | | | | - Rod J. Snowdon
- Department of Plant Breeding, Justus Liebig UniversityGiessen, Germany
- *Correspondence: Rod J. Snowdon, Department of Plant Breeding, Justus Liebig University, IFZ Research Centre for Biosystems, Land Use and Nutrition, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
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13
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Hatzig S, Zaharia LI, Abrams S, Hohmann M, Legoahec L, Bouchereau A, Nesi N, Snowdon RJ. Early osmotic adjustment responses in drought-resistant and drought-sensitive oilseed rape. J Integr Plant Biol 2014; 56:797-809. [PMID: 24667002 DOI: 10.1111/jipb.12199] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 03/24/2014] [Indexed: 05/09/2023]
Abstract
The impact of osmotic stress on growth, physiology, and metabolism of winter oilseed rape (Brassica napus L.) was investigated by detailed analysis of biomass traits, hormone metabolites and osmolytes in two genetically unrelated drought-tolerant genotypes and two unrelated drought-sensitive genotypes. Seedlings were grown in vitro under controlled conditions and osmotic stress was simulated by applying a gradual treatment with polyethylene glycol (PEG 6000), followed by hypo-osmotic treatment of variants used for metabolite determination. The results provide a basis for the identification of reliable selection criteria for drought resistance in oilseed rape. The in vitro cultivation system established during this study enabled effective discrimination of early osmotic stress responses between drought-resistant and -susceptible oilseed rape genotypes that also show large differences in relative seed yield under drought conditions in the field. Clear physiological and metabolic differences were observed between the drought-resistant and drought-sensitive genotypes, suggesting that osmotic adjustment is a key component of drought response in oilseed rape. Unexpectedly, however, the drought-resistant genotypes did not show typical hormonal adjustment and osmolyte accumulation, suggesting that they possess alternative physiological mechanisms enabling avoidance of stress symptoms.
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Affiliation(s)
- Sarah Hatzig
- Department of Plant Breeding, IFZ Research Centre for Biosystems, Land Use and Nutrition, Justus Liebig University, 35392, Giessen, Germany
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14
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Jolivet P, Acevedo F, Boulard C, d'Andréa S, Faure JD, Kohli A, Nesi N, Valot B, Chardot T. Crop seed oil bodies: from challenges in protein identification to an emerging picture of the oil body proteome. Proteomics 2013; 13:1836-49. [PMID: 23589365 DOI: 10.1002/pmic.201200431] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2012] [Revised: 02/08/2013] [Accepted: 02/11/2013] [Indexed: 01/27/2023]
Abstract
Oleaginous seeds store lipids in specialized structures called oil bodies (OBs). These organelles consist of a core of neutral lipids bound by proteins embedded in a phospholipid monolayer. OB proteins are well conserved in plants and have long been grouped into only two categories: structural proteins or enzymes. Recent work, however, which identified other classes of proteins associated with OBs, clearly shows that this classification is obsolete. Proteomics-mediated OB protein identification is facilitated in plants for which the genome is sequenced and annotated. However, it is not clear whether this knowledge can be dependably transposed to less well-characterized plants, including the well-established commercial sources of seed oil as well as the many others being proposed as novel sources for biodiesel, especially in Africa and Asia. Toward an update of the current data available on OB proteins this review discusses (i) the specific difficulties for proteomic studies of organelles; (ii) a 2012 census of the proteins found in seed OBs from various crops; (iii) the oleosin composition of OBs and their role in organelle stability; (iv) PTM of OB proteins as an emerging field of investigation; and finally we describe the emerging model of the OB proteome from oilseed crops.
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Affiliation(s)
- Pascale Jolivet
- INRA, UMR1318, Institut Jean-Pierre Bourgin, Saclay Plant Sciences, Versailles, France
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15
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Jolivet P, Boulard C, Bellamy A, Valot B, d'Andréa S, Zivy M, Nesi N, Chardot T. Oil body proteins sequentially accumulate throughout seed development in Brassica napus. J Plant Physiol 2011; 168:2015-2020. [PMID: 21803444 DOI: 10.1016/j.jplph.2011.06.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 06/07/2011] [Accepted: 06/08/2011] [Indexed: 05/31/2023]
Abstract
Despite the importance of seed oil bodies (OBs) as enclosed compartments for oil storage, little is known about lipid and protein accumulation in OBs during seed formation. OBs from rapeseed (Brassica napus) consist of a triacylglycerol (TAG) core surrounded by a phospholipid monolayer embedded with integral proteins which confer high stability to OBs in the mature dry seed. In the present study, we investigated lipid and protein accumulation patterns throughout seed development (from 5 to 65 days after pollination [DAP]) both in the whole seed and in purified OBs. Deposition of the major proteins (oleosins, caleosins and steroleosins) into OBs was assessed through (i) gene expression pattern, (ii) proteomics analysis, and (iii) protein immunodetection. For the first time, a sequential deposition of integral OB proteins was established. Accumulation of oleosins and caleosins was observed starting from early stages of seed development (12-17 DAP), while steroleosins accumulated later (~25 DAP) onwards.
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Affiliation(s)
- Pascale Jolivet
- INRA, AgroParisTech, Institut Jean-Pierre Bourgin, UMR 1318, F-78000 Versailles, France.
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16
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Rauso GM, Nesi N, Fragola L, Santagata M, Santillo V, Rauso R. Ostheosynthesis plates, screws, xenogenic graft and resorbable barriers for preimplant and peri-implant surgery. Minerva Stomatol 2010; 59:315-324. [PMID: 20588218] [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: 05/29/2023]
Abstract
AIM The guided bone regeneration (GBR) procedure allows the regeneration of bone in implant surgery. A variety of GBR procedures to provide the bony-support for implant placement have been described and a variety of devices to perform this procedures have been used. The authors have carried out a retrospective study on the use of ostheosynthesis plates, screws, xenogenic bone grafting material and resorbable barriers for implant and preimplant surgery. METHODS Fourteen partially edentulous patients were treated by a single surgeon in a private dental clinic in Italy. Patients age ranged between 28 and 52 years old. Every patients was treated with GBR technique performed with the use of ostheosynthesis plate and screws, xenogenic bone grafting material and resorbable barriers in staged or simultaneous implant placement. RESULTS Twenty-one implants were placed and no-one failed, all planned prostheses were delivered. In all the cases a complete bone regeneration was obtained. CONCLUSION The outcomes of the study allow to state that the GBR technique performed with ostheosynthesis plates, screws, xenogenic graft and resorbable barriers is a safe alternative to the others well established GBR procedure.
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17
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Auger B, Marnet N, Gautier V, Maia-Grondard A, Leprince F, Renard M, Guyot S, Nesi N, Routaboul JM. A detailed survey of seed coat flavonoids in developing seeds of Brassica napus L. J Agric Food Chem 2010; 58:6246-56. [PMID: 20429588 DOI: 10.1021/jf903619v] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Proanthocyanidins (PAs) are seed coat flavonoids that impair the digestibility of Brassica napus meal. Development of low-PA lines is associated with a high-quality meal and with increased contents in oil and proteins, but requires better knowledge of seed flavonoids. Flavonoids in Brassica mature seed are mostly insoluble so that very few qualitative and quantitative data are available yet. In the present study, the profiling of seed coat flavonoids was established in eight black-seeded B. napus genotypes, during seed development when soluble flavonoids were present and predominated over the insoluble forms. Thirteen different flavonoids including (-)-epicatechin, five procyanidins (PCs which are PAs composed of epicatechin oligomers only) and seven flavonols (quercetin-3-O-glucoside, quercetin-dihexoside, isorhamnetin-3-O-glucoside, isorhamnetin-hexoside-sulfate, isorhamnetin-dihexoside, isorhamnetin-sinapoyl-trihexoside and kaempferol-sinapoyl-trihexoside) were identified and quantified using liquid chromatography coupled to electrospray ionization-mass spectrometry (LC-ESI-MS(n)). These flavonol derivatives were characterized for the first time in the seed coat of B. napus, and isorhamnetin-hexoside-sulfate and isorhamnetin-sinapoyl-trihexoside were newly identified in Brassica spp. High amounts of PCs accumulated in the seed coat, with solvent-soluble polymers of (-)-epicatechin reaching up to 10% of the seed coat weight during seed maturation. In addition, variability for both PC and flavonol contents was observed within the panel of eight black-seeded genotypes. Our results provide new insights into breeding for low-PC B. napus genotypes.
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Affiliation(s)
- Bathilde Auger
- UMR118 INRA, Agrocampus Ouest, Université Rennes 1, Amélioration des Plantes et Biotechnologies Végétales, BP35327, 35653 Le Rheu Cedex, France
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Auger B, Baron C, Lucas MO, Vautrin S, Bergès H, Chalhoub B, Fautrel A, Renard M, Nesi N. Brassica orthologs from BANYULS belong to a small multigene family, which is involved in procyanidin accumulation in the seed. Planta 2009; 230:1167-83. [PMID: 19760260 PMCID: PMC2764081 DOI: 10.1007/s00425-009-1017-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2009] [Accepted: 09/03/2009] [Indexed: 05/03/2023]
Abstract
As part of a research programme focused on flavonoid biosynthesis in the seed coat of Brassica napus L. (oilseed rape), orthologs of the BANYULS gene that encoded anthocyanidin reductase were cloned in B. napus as well as in the related species Brassica rapa and Brassica oleracea. B. napus genome contained four functional copies of BAN, two originating from each diploid progenitor. Amino acid sequences were highly conserved between the Brassicaceae including B. napus, B. rapa, B. oleracea as well as the model plant Arabidopsis thaliana. Along the 200 bp in 5' of the ATG codon, Bna.BAN promoters (ProBna.BAN) were conserved with AtANR promoter and contained putative cis-acting elements. In addition, transgenic Arabidopsis and oilseed rape plants carrying the first 230 bp of ProBna.BAN fused to the UidA reporter gene were generated. In the two Brassicaceae backgrounds, ProBna.BAN activity was restricted to the seed coat. In B. napus seed, ProBna.BAN was activated in procyanidin-accumulating cells, namely the innermost layer of the inner integument and the micropyle-chalaza area. At the transcriptional level, the four Bna.BAN genes were expressed in the seed. Laser microdissection assays of the seed integuments showed that Bna.BAN expression was restricted to the inner integument, which was consistent with the activation profile of ProBna.BAN. Finally, Bna.BAN genes were mapped onto oilseed rape genetic maps and potential co-localisations with seed colour quantitative trait loci are discussed.
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MESH Headings
- Amino Acid Sequence
- Arabidopsis/enzymology
- Arabidopsis/genetics
- Arabidopsis/metabolism
- Base Sequence
- Biflavonoids/metabolism
- Brassica/enzymology
- Brassica/genetics
- Brassica/metabolism
- Brassica napus/enzymology
- Brassica napus/genetics
- Brassica napus/metabolism
- Brassica rapa/enzymology
- Brassica rapa/genetics
- Brassica rapa/metabolism
- Catechin/metabolism
- Chromosome Mapping
- Chromosomes, Plant/genetics
- Gene Expression Profiling
- Genome, Plant
- Glucuronidase/genetics
- Glucuronidase/metabolism
- Molecular Sequence Data
- Multigene Family
- NADH, NADPH Oxidoreductases/classification
- NADH, NADPH Oxidoreductases/genetics
- NADH, NADPH Oxidoreductases/metabolism
- Phylogeny
- Plant Proteins/genetics
- Plant Proteins/metabolism
- Plants, Genetically Modified
- Proanthocyanidins/metabolism
- Promoter Regions, Genetic/genetics
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/metabolism
- Seeds/genetics
- Seeds/metabolism
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Sequence Homology, Nucleic Acid
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Affiliation(s)
- Bathilde Auger
- UMR118 Amélioration des Plantes et Biotechnologies Végétales, INRA, Agrocampus Ouest, Université Rennes1, BP 35327, 35653 Le Rheu Cedex, France
| | - Cécile Baron
- UMR118 Amélioration des Plantes et Biotechnologies Végétales, INRA, Agrocampus Ouest, Université Rennes1, BP 35327, 35653 Le Rheu Cedex, France
| | - Marie-Odile Lucas
- UMR118 Amélioration des Plantes et Biotechnologies Végétales, INRA, Agrocampus Ouest, Université Rennes1, BP 35327, 35653 Le Rheu Cedex, France
| | - Sonia Vautrin
- Centre National de Ressources en Génomique Végétale (CNRGV), INRA, Chemin de Borde Rouge, BP 52627, 31326 Castanet Tolosan, France
| | - Hélène Bergès
- Centre National de Ressources en Génomique Végétale (CNRGV), INRA, Chemin de Borde Rouge, BP 52627, 31326 Castanet Tolosan, France
| | - Boulos Chalhoub
- UMR1165 Unité de Recherche en Génomique Végétale, INRA, CNRS, Université d’Evry, 2 rue Gaston Crémieux, CP 5708, 91057 Evry Cedex, France
| | - Alain Fautrel
- IFR140 Biogenouest Plate-forme d’Histopathologie, U620 INSERM, Université Rennes1, 35043 Rennes Cedex, France
| | - Michel Renard
- UMR118 Amélioration des Plantes et Biotechnologies Végétales, INRA, Agrocampus Ouest, Université Rennes1, BP 35327, 35653 Le Rheu Cedex, France
| | - Nathalie Nesi
- UMR118 Amélioration des Plantes et Biotechnologies Végétales, INRA, Agrocampus Ouest, Université Rennes1, BP 35327, 35653 Le Rheu Cedex, France
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Jolivet P, Boulard C, Bellamy A, Larré C, Barre M, Rogniaux H, d'Andréa S, Chardot T, Nesi N. Protein composition of oil bodies from mature Brassica napus seeds. Proteomics 2009; 9:3268-84. [DOI: 10.1002/pmic.200800449] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Nesi N, Lucas MO, Auger B, Baron C, Lécureuil A, Guerche P, Kronenberger J, Lepiniec L, Debeaujon I, Renard M. The promoter of the Arabidopsis thaliana BAN gene is active in proanthocyanidin-accumulating cells of the Brassica napus seed coat. Plant Cell Rep 2009; 28:601-17. [PMID: 19153740 DOI: 10.1007/s00299-008-0667-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2008] [Revised: 12/19/2008] [Accepted: 12/30/2008] [Indexed: 05/08/2023]
Abstract
As part of an ongoing research program dedicated to the understanding of proanthocyanidin (PA) accumulation in Brassica napus seed coat, transgenic rapeseed plants carrying a 2.3-kb fragment of the Arabidopsis thaliana BAN promoter (ProAtBAN) fused to the uidA reporter gene (GUS) were generated. Analysis of these plants revealed that ProAtBAN was activated in B. napus seed coat, following a spatio-temporal pattern that was very similar to the PA deposition profile in rapeseed and also to the one previously described in Arabidopsis. ProAtBAN activity occurred as soon as the early stages of embryogenesis and was restricted to the cells where PAs were shown to accumulate. Therefore, the Arabidopsis BAN promoter can be used to trigger gene expression in B. napus seed coat for both genetic engineering and functional validation of candidate genes. In addition, these data strongly suggest that the transcriptional regulatory network of the BAN gene is conserved between Arabidopsis and rapeseed. This is consistent with the fact that similarity searches of the public rapeseed sequence databases allowed recovering the rapeseed homologs for several BAN regulators, namely TT1, TT2, TT8, TT16 and TTG1, which have been previously described in Arabidopsis.
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Affiliation(s)
- Nathalie Nesi
- UMR118 INRA-Agrocampus Ouest-Université de Rennes1 Amélioration des Plantes et Biotechnologies Végétales, Le Rheu Cedex, France.
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21
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Pignocchi C, Minns GE, Nesi N, Koumproglou R, Kitsios G, Benning C, Lloyd CW, Doonan JH, Hills MJ. ENDOSPERM DEFECTIVE1 Is a Novel Microtubule-Associated Protein Essential for Seed Development in Arabidopsis. Plant Cell 2009; 21:90-105. [PMID: 19151224 PMCID: PMC2648083 DOI: 10.1105/tpc.108.061812] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Revised: 12/10/2008] [Accepted: 01/05/2009] [Indexed: 05/18/2023]
Abstract
Early endosperm development involves a series of rapid nuclear divisions in the absence of cytokinesis; thus, many endosperm mutants reveal genes whose functions are essential for mitosis. This work finds that the endosperm of Arabidopsis thaliana endosperm-defective1 (ede1) mutants never cellularizes, contains a reduced number of enlarged polyploid nuclei, and features an aberrant microtubule cytoskeleton, where the specialized radial microtubule systems and cytokinetic phragmoplasts are absent. Early embryo development is substantially normal, although occasional cytokinesis defects are observed. The EDE1 gene was cloned using a map-based approach and represents the pioneer member of a conserved plant-specific family of genes of previously unknown function. EDE1 is expressed in the endosperm and embryo of developing seeds, and its expression is tightly regulated during cell cycle progression. EDE1 protein accumulates in nuclear caps in premitotic cells, colocalizes along microtubules of the spindle and phragmoplast, and binds microtubules in vitro. We conclude that EDE1 is a novel plant-specific microtubule-associated protein essential for microtubule function during the mitotic and cytokinetic stages that generate the Arabidopsis endosperm and embryo.
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Affiliation(s)
- Cristina Pignocchi
- John Ines Centre, Norwich Research Park, Norwich, NR4 7UH, United Kingdom
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22
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Abstract
Oilseed rape (Brassica napus L.) is a major oil crop that also supplies proteins for the feed industry. In order to reduce total cost production, the objective is to increase oil yield while reducing crop inputs (especially nitrogen and pesticides). Concomitantly, it is necessary to anticipate specific uses (e.g., fatty acid composition) and to ensure the valorisation of the by-products (rapeseed meal). By the past, improvement of seed quality focused on fatty acid balance and low seed glucosinolate content. Current goals include the breeding of yellow-seeded rapeseed lines with high content of seed oil. The use of molecular tools and the exploitation of Arabidopsis knowledge will be presented and discussed.
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Affiliation(s)
- Nathalie Nesi
- INRA-Agrocampus Rennes-University of Rennes1 Joint Laboratory, UMR118, Plant Genetics and Biotechnologies, BP 35327, 35653 Le Rheu cedex, France.
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23
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Abstract
Flavonoids are secondary metabolites that accumulate in most plant seeds and are involved in physiological functions such as dormancy or viability. This review presents a current view of the genetic and biochemical control of flavonoid metabolism during seed development. It focuses mainly on proanthocyanidin accumulation in Arabidopsis, with comparisons to other related metabolic and regulatory pathways. These intricate networks and their fine-tuned regulation, once they are determined, should contribute to a better understanding of seed coat development and the control of PA and flavonol metabolism. In addition, flavonoids provide an interesting model to study various biological processes and metabolic and regulatory networks.
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Affiliation(s)
- Loïc Lepiniec
- Seed Biology, Institut Jean-Pierre Bourgin (IJPB), INRA, 78026 Versailles, France.
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24
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Debeaujon I, Nesi N, Perez P, Devic M, Grandjean O, Caboche M, Lepiniec L. Proanthocyanidin-accumulating cells in Arabidopsis testa: regulation of differentiation and role in seed development. Plant Cell 2003. [PMID: 14555692 DOI: 10.1105/tpc.014043.1] [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: 05/10/2023]
Abstract
Anthocyanidin reductase encoded by the BANYULS (BAN) gene is the core enzyme in proanthocyanidin (PA) biosynthesis. Here, we analyzed the developmental mechanisms that regulate the spatiotemporal expression of BAN in the developing Arabidopsis seed coat. PA-accumulating cells were localized histochemically in the inner integument (seed body and micropyle) and pigment strand (chalaza). BAN promoter activity was detected specifically in these cells. Gain-of-function experiments showed that an 86-bp promoter fragment functioned as an enhancer specific for PA-accumulating cells. Mutations in regulatory genes of PA biosynthesis abolished BAN promoter activity (transparent testa2 [tt2], tt8, and transparent testa glabra1 [ttg1]), modified its spatial pattern (tt1 and tt16), or had no influence (ttg2), thus revealing complex regulatory interactions at several developmental levels. Genetic ablation of PA-accumulating cells targeted by the BAN promoter fused to BARNASE led to the formation of normal plants that produced viable yellow seeds. Importantly, these seeds had no obvious defects in endosperm and embryo development.
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Affiliation(s)
- Isabelle Debeaujon
- Laboratoire de Biologie des Semences, Unité Mixte de Recherche, 204 Institut National de la Recherche Agronomique, Paris-Grignon, 78026 Versailles, France
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25
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Debeaujon I, Nesi N, Perez P, Devic M, Grandjean O, Caboche M, Lepiniec L. Proanthocyanidin-accumulating cells in Arabidopsis testa: regulation of differentiation and role in seed development. Plant Cell 2003; 15:2514-31. [PMID: 14555692 PMCID: PMC280558 DOI: 10.1105/tpc.014043] [Citation(s) in RCA: 266] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Anthocyanidin reductase encoded by the BANYULS (BAN) gene is the core enzyme in proanthocyanidin (PA) biosynthesis. Here, we analyzed the developmental mechanisms that regulate the spatiotemporal expression of BAN in the developing Arabidopsis seed coat. PA-accumulating cells were localized histochemically in the inner integument (seed body and micropyle) and pigment strand (chalaza). BAN promoter activity was detected specifically in these cells. Gain-of-function experiments showed that an 86-bp promoter fragment functioned as an enhancer specific for PA-accumulating cells. Mutations in regulatory genes of PA biosynthesis abolished BAN promoter activity (transparent testa2 [tt2], tt8, and transparent testa glabra1 [ttg1]), modified its spatial pattern (tt1 and tt16), or had no influence (ttg2), thus revealing complex regulatory interactions at several developmental levels. Genetic ablation of PA-accumulating cells targeted by the BAN promoter fused to BARNASE led to the formation of normal plants that produced viable yellow seeds. Importantly, these seeds had no obvious defects in endosperm and embryo development.
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Affiliation(s)
- Isabelle Debeaujon
- Laboratoire de Biologie des Semences, Unité Mixte de Recherche, 204 Institut National de la Recherche Agronomique, Paris-Grignon, 78026 Versailles, France
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26
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Nesi N, Debeaujon I, Jond C, Stewart AJ, Jenkins GI, Caboche M, Lepiniec L. The TRANSPARENT TESTA16 locus encodes the ARABIDOPSIS BSISTER MADS domain protein and is required for proper development and pigmentation of the seed coat. Plant Cell 2002; 14:2463-79. [PMID: 12368498 PMCID: PMC151229 DOI: 10.1105/tpc.004127] [Citation(s) in RCA: 221] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2002] [Accepted: 07/19/2002] [Indexed: 05/18/2023]
Abstract
Screening for seed pigmentation phenotypes in Arabidopsis led to the isolation of three allelic yellow-seeded mutants, which defined the novel TRANSPARENT TESTA16 (TT16) locus. Cloning of TT16 was performed by T-DNA tagging and confirmed by genetic complementation and sequencing of two mutant alleles. TT16 encodes the ARABIDOPSIS BSISTER (ABS) MADS domain protein. ABS belongs to the recently identified "B-sister" (B(S)) clade, which contains genes of unknown function that are expressed mainly in female organs. Phylogenetic analyses using a maximum parsimony approach confirmed that TT16/ABS and related proteins form a monophyletic group. TT16/ABS was expressed mainly in the ovule, as are the other members of the B(S) clade. TT16/ABS is necessary for BANYULS expression and proanthocyanidin accumulation in the endothelium of the seed coat, with the exception of the chalazal-micropylar area. In addition, mutant phenotype and ectopic expression analyses suggested that TT16/ABS also is involved in the specification of endothelial cells. Nevertheless, TT16/ABS apparently is not required for proper ovule function. We report the functional characterization of a member of the B(S) MADS box gene subfamily, demonstrating its involvement in endothelial cell specification as well as in the increasingly complex genetic control of flavonoid biosynthesis in the Arabidopsis seed coat.
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Affiliation(s)
- Nathalie Nesi
- Laboratoire de Biologie des Semences, Unité Mixte de Recherche, Institut National de la Recherche Agronomique, Centre de Versailles, Route de Saint-Cyr, 78026 Versailles Cedex, France
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27
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Nesi N, Jond C, Debeaujon I, Caboche M, Lepiniec L. The Arabidopsis TT2 gene encodes an R2R3 MYB domain protein that acts as a key determinant for proanthocyanidin accumulation in developing seed. Plant Cell 2001; 13:2099-2114. [PMID: 11549766 DOI: 10.1105/tpc.13.9.2099] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In Arabidopsis, proanthocyanidins specifically accumulate in the endothelium during early seed development. At least three TRANSPARENT TESTA (TT) genes, TT2, TT8, and TTG1, are necessary for the normal expression of several flavonoid structural genes in immature seed, such as DIHYDROFLAVONOL-4-REDUCTASE and BANYULS (BAN). TT8 and TTG1 were characterized recently and found to code for a basic helix-loop-helix domain transcription factor and a WD-repeat-containing protein, respectively. Here the molecular cloning of the TT2 gene was achieved by T-DNA tagging. TT2 encoded an R2R3 MYB domain protein with high similarity to the rice OsMYB3 protein and the maize COLORLESS1 factor. A TT2-green fluorescent protein fusion protein was located mostly in the nucleus, in agreement with the regulatory function of the native TT2 protein. TT2 expression was restricted to the seed during early embryogenesis, consistent with BAN expression and the proanthocyanidin deposition profile. Finally, in gain-of-function experiments, TT2 was able to induce ectopic expression of BAN in young seedlings and roots in the presence of a functional TT8 protein. Therefore, our results strongly suggest that stringent spatial and temporal BAN expression, and thus proanthocyanidin accumulation, are determined at least partially by TT2.
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Affiliation(s)
- N Nesi
- Laboratoire de Biologie des Semences, Unité Mixte de Recherche, Institut National de la Recherche Agronomique, Centre de Versailles, Route de Saint-Cyr, 78026 Versailles Cedex, France
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28
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Nesi N, Jond C, Debeaujon I, Caboche M, Lepiniec L. The Arabidopsis TT2 gene encodes an R2R3 MYB domain protein that acts as a key determinant for proanthocyanidin accumulation in developing seed. Plant Cell 2001; 13:2099-2114. [PMID: 11549766 DOI: 10.2307/3871430] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In Arabidopsis, proanthocyanidins specifically accumulate in the endothelium during early seed development. At least three TRANSPARENT TESTA (TT) genes, TT2, TT8, and TTG1, are necessary for the normal expression of several flavonoid structural genes in immature seed, such as DIHYDROFLAVONOL-4-REDUCTASE and BANYULS (BAN). TT8 and TTG1 were characterized recently and found to code for a basic helix-loop-helix domain transcription factor and a WD-repeat-containing protein, respectively. Here the molecular cloning of the TT2 gene was achieved by T-DNA tagging. TT2 encoded an R2R3 MYB domain protein with high similarity to the rice OsMYB3 protein and the maize COLORLESS1 factor. A TT2-green fluorescent protein fusion protein was located mostly in the nucleus, in agreement with the regulatory function of the native TT2 protein. TT2 expression was restricted to the seed during early embryogenesis, consistent with BAN expression and the proanthocyanidin deposition profile. Finally, in gain-of-function experiments, TT2 was able to induce ectopic expression of BAN in young seedlings and roots in the presence of a functional TT8 protein. Therefore, our results strongly suggest that stringent spatial and temporal BAN expression, and thus proanthocyanidin accumulation, are determined at least partially by TT2.
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Affiliation(s)
- N Nesi
- Laboratoire de Biologie des Semences, Unité Mixte de Recherche, Institut National de la Recherche Agronomique, Centre de Versailles, Route de Saint-Cyr, 78026 Versailles Cedex, France
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29
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Nesi N, Jond C, Debeaujon I, Caboche M, Lepiniec L. The Arabidopsis TT2 gene encodes an R2R3 MYB domain protein that acts as a key determinant for proanthocyanidin accumulation in developing seed. Plant Cell 2001; 13:2099-114. [PMID: 11549766 PMCID: PMC139454 DOI: 10.1105/tpc.010098] [Citation(s) in RCA: 462] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2001] [Accepted: 06/09/2001] [Indexed: 05/18/2023]
Abstract
In Arabidopsis, proanthocyanidins specifically accumulate in the endothelium during early seed development. At least three TRANSPARENT TESTA (TT) genes, TT2, TT8, and TTG1, are necessary for the normal expression of several flavonoid structural genes in immature seed, such as DIHYDROFLAVONOL-4-REDUCTASE and BANYULS (BAN). TT8 and TTG1 were characterized recently and found to code for a basic helix-loop-helix domain transcription factor and a WD-repeat-containing protein, respectively. Here the molecular cloning of the TT2 gene was achieved by T-DNA tagging. TT2 encoded an R2R3 MYB domain protein with high similarity to the rice OsMYB3 protein and the maize COLORLESS1 factor. A TT2-green fluorescent protein fusion protein was located mostly in the nucleus, in agreement with the regulatory function of the native TT2 protein. TT2 expression was restricted to the seed during early embryogenesis, consistent with BAN expression and the proanthocyanidin deposition profile. Finally, in gain-of-function experiments, TT2 was able to induce ectopic expression of BAN in young seedlings and roots in the presence of a functional TT8 protein. Therefore, our results strongly suggest that stringent spatial and temporal BAN expression, and thus proanthocyanidin accumulation, are determined at least partially by TT2.
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Affiliation(s)
- N Nesi
- Laboratoire de Biologie des Semences, Unité Mixte de Recherche, Institut National de la Recherche Agronomique, Centre de Versailles, Route de Saint-Cyr, 78026 Versailles Cedex, France
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30
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Nesi N, Debeaujon I, Jond C, Pelletier G, Caboche M, Lepiniec L. The TT8 gene encodes a basic helix-loop-helix domain protein required for expression of DFR and BAN genes in Arabidopsis siliques. Plant Cell 2000; 12:1863-1878. [PMID: 11041882 DOI: 10.2307/3871198] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The TRANSPARENT TESTA8 (TT8) locus is involved in the regulation of flavonoid biosynthesis in Arabidopsis. The tt8-3 allele was isolated from a T-DNA-mutagenized Arabidopsis collection and found to be tagged by an integrative molecule, thus permitting the cloning and sequencing of the TT8 gene. TT8 identity was confirmed by complementation of tt8-3 and sequence analysis of an additional allele. The TT8 gene encodes a protein that displays a basic helix-loop-helix at its C terminus and represents an Arabidopsis ortholog of the maize R transcription factors. The TT8 transcript is present in developing siliques and in young seedlings. The TT8 protein is required for normal expression of two flavonoid late biosynthetic genes, namely, DIHYDROFLAVONOL 4-REDUCTASE (DFR) and BANYULS (BAN), in Arabidopsis siliques. Interestingly, TRANSPARENT TESTA GLABRA1 (TTG1) and TT2 genes also control the expression of DFR and BAN genes. Our results suggest that the TT8, TTG1, and TT2 proteins may interact to control flavonoid metabolism in the Arabidopsis seed coat.
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Affiliation(s)
- N Nesi
- Laboratoire de Biologie des Semences, Unité Mixte de Recherche INRA/INA-PG, Institut National de la Recherche Agronomique, Centre de Versailles, Route de Saint-Cyr, 78026 Versailles Cedex, France
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31
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Nesi N, Debeaujon I, Jond C, Pelletier G, Caboche M, Lepiniec L. The TT8 gene encodes a basic helix-loop-helix domain protein required for expression of DFR and BAN genes in Arabidopsis siliques. Plant Cell 2000; 12:1863-78. [PMID: 11041882 PMCID: PMC149125 DOI: 10.1105/tpc.12.10.1863] [Citation(s) in RCA: 509] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2000] [Accepted: 08/28/2000] [Indexed: 05/17/2023]
Abstract
The TRANSPARENT TESTA8 (TT8) locus is involved in the regulation of flavonoid biosynthesis in Arabidopsis. The tt8-3 allele was isolated from a T-DNA-mutagenized Arabidopsis collection and found to be tagged by an integrative molecule, thus permitting the cloning and sequencing of the TT8 gene. TT8 identity was confirmed by complementation of tt8-3 and sequence analysis of an additional allele. The TT8 gene encodes a protein that displays a basic helix-loop-helix at its C terminus and represents an Arabidopsis ortholog of the maize R transcription factors. The TT8 transcript is present in developing siliques and in young seedlings. The TT8 protein is required for normal expression of two flavonoid late biosynthetic genes, namely, DIHYDROFLAVONOL 4-REDUCTASE (DFR) and BANYULS (BAN), in Arabidopsis siliques. Interestingly, TRANSPARENT TESTA GLABRA1 (TTG1) and TT2 genes also control the expression of DFR and BAN genes. Our results suggest that the TT8, TTG1, and TT2 proteins may interact to control flavonoid metabolism in the Arabidopsis seed coat.
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Affiliation(s)
- N Nesi
- Laboratoire de Biologie des Semences, Unité Mixte de Recherche INRA/INA-PG, Institut National de la Recherche Agronomique, Centre de Versailles, Route de Saint-Cyr, 78026 Versailles Cedex, France
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32
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Nesi N, Magrì G, Massimino O, Seminara F, Lanzafame S, Messina C, Nesi L. [Esophageal stenosis caused by benign mucous pemphigoid]. G Chir 1989; 10:191-4. [PMID: 2518554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The Authors report a case of benign mucous pemphigoid. The review of the literature has confirmed the rarity of this disease. After having discussed acquired diagnostic data, the Authors show reasons to justify the endoscopic surgical treatment. Furthermore, they underline the importance of associated medical therapy as well as follow-ups which patients must periodically undergo.
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