1
|
Ben-Amar A, Allel D, Bouamama-Gzara B. Osmotic priming-induced cryotolerance uncovers rejuvenation of grapevine cell cultures: morphogenetic changes and gene expression pattern highlighting enhanced embryogenic potential. PROTOPLASMA 2024:10.1007/s00709-024-01968-5. [PMID: 38980351 DOI: 10.1007/s00709-024-01968-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Accepted: 06/25/2024] [Indexed: 07/10/2024]
Abstract
Cryopreservation is a reliable technique for the long-term storage and preservation of embryogenic cells, maintaining their viability without loss of their embryogenic capacity. However, the large-scale conservation of grapevine embryogenic lines in cryobanks remains limited. A significant challenge is understanding somatic cell rejuvenation. Here, we investigate the encapsulation/dehydration and encapsulation/vitrification for cryopreserving embryogenic material. Cell rejuvenation and enhanced embryogenic competence were observed after cryopreservation, as evidenced through structural cellular changes observed by histology and electron scanning microscopy. Results showed that cryopreserved samples of 110-Richter, Riesling, and Tempranillo using encapsulation/dehydration had better survival rates, averaging 81%, 62%, and 48%, respectively, while encapsulation/vitrification yielded lower survival rates, averaging 58%, 42%, and 32%, respectively. Cryopreservation also improved post-thaw recovery and regeneration efficiency assessed through regrowth of proembryogenic masses and somatic embryo conversion reaching 54-72% against 11-17% in control samples. Cryopreservation triggered changes in gene expression patterns and exhibited considerable increase at genotype-specific basis of 1.5- to 4.5-fold in SERK1, BBM, and WOX associated to embryogenic competence as well as in ChitIV and LEA involved in stress response. Membrane stability index, hydrogen peroxide, and proline contents were used as indicators of oxidative stress uncovering a key role of an osmotic trans-priming effect leading to cryotolerance. Our finding highlighted that cryopreservation enhances embryogenic capacity in senescent callus and probably acts as a screening process allowing safe maintenance of proembryogenic cells and promoting their recovery. This study provides a high throughput innovation to set up cryolines for cell rejuvenation of grapevine and other important plant species.
Collapse
Affiliation(s)
- Anis Ben-Amar
- Department of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Science and Technology Park, P.O. Box. 901, 2050, Hammam-Lif, Tunisia.
| | - Dorsaf Allel
- Department of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Science and Technology Park, P.O. Box. 901, 2050, Hammam-Lif, Tunisia
| | - Badra Bouamama-Gzara
- Department of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Science and Technology Park, P.O. Box. 901, 2050, Hammam-Lif, Tunisia
| |
Collapse
|
2
|
Martínez ME, Jorquera L, Poirrier P, Díaz K, Chamy R. Effect of Inoculum Size and Age, and Sucrose Concentration on Cell Growth to Promote Metabolites Production in Cultured Taraxacum officinale (Weber) Cells. PLANTS (BASEL, SWITZERLAND) 2023; 12:1116. [PMID: 36903977 PMCID: PMC10004745 DOI: 10.3390/plants12051116] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
Pentacyclic triterpenes, including lupeol, α- amyrin, and β-amyrin, present a large range of biological activities including anti-inflammatory, anti-cancer, and gastroprotective properties. The phytochemistry of dandelion (Taraxacum officinale) tissues has been widely described. Plant biotechnology offers an alternative for secondary metabolite production and several active plant ingredients are already synthesized through in vitro cultures. This study aimed to establish a suitable protocol for cell growth and to determine the accumulation of α-amyrin and lupeol in cell suspension cultures of T. officinale under different culture conditions. To this end, inoculum density (0.2% to 8% (w/v)), inoculum age (2- to 10-week-old), and carbon source concentration (1%, 2.3%, 3.2%, and 5.5% (w/v)) were investigated. Hypocotyl explants of T. officinale were used for callus induction. Age, size, and sucrose concentrations were statistically significant in cell growth (fresh and dry weight), cell quality (aggregation, differentiation, viability), and triterpenes yield. The best conditions for establishing a suspension culture were achieved by using a 6-week-old callus at 4% (w/v) and 1% (w/v) of sucrose concentration. Results indicate that 0.04 (±0.02) α-amyrin and 0.03 (±0.01) mg/g lupeol can be obtained in suspension culture under these starting conditions at the 8th week of culture. The results of the present study provide a backdrop for future studies in which an elicitor could be incorporated to increase the large-scale production of α-amyrin and lupeol from T. officinale.
Collapse
Affiliation(s)
- María Eugenia Martínez
- Escuela de Ingeniería Bioquímica, Facultad de Ingeniería, Pontificia Universidad Católica de Valparaíso, Brasil 2085, Valparaíso 237463, Chile
| | - Lorena Jorquera
- Escuela de Ingeniería en Construcción y Transporte, Facultad de Ingeniería, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2147, Valparaíso 237463, Chile
| | - Paola Poirrier
- Escuela de Ingeniería Bioquímica, Facultad de Ingeniería, Pontificia Universidad Católica de Valparaíso, Brasil 2085, Valparaíso 237463, Chile
| | - Katy Díaz
- Departamento de Química, Universidad Técnica Federico Santa María, Avenida España #1680, Valparaíso 2390123, Chile
| | - Rolando Chamy
- Escuela de Ingeniería Bioquímica, Facultad de Ingeniería, Pontificia Universidad Católica de Valparaíso, Brasil 2085, Valparaíso 237463, Chile
| |
Collapse
|
3
|
Ben-Amar A, Allel D, Mliki A. Up-regulation of a stress-responsive endochitinase VvChit-IV in grapevine cell cultures improves in vitro stress tolerance. PROTOPLASMA 2022; 259:1189-1203. [PMID: 34984633 DOI: 10.1007/s00709-021-01733-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Chitinases are pathogenesis-related proteins, which play an important role in plant growth regulation, defense mechanism, and stress tolerance. Embryogenic cultures from Vitis vinifera cv. Tempranillo exposed to in vitro stress exhibited the expression of an extracellular class IV endochitinase VvChit-IV. Phylogenetic and conserved motif analyses provided insights into the evolutionary relationships of chitinases. A computation-based investigation showed conserved domains and illustrated a chitin-binding site for chitin cleavage with a catalytic domain of glycoside hydrolase. Interestingly, gene expression pattern showed a differential expression of VvChit-IV associated with embryonic stress response to in vitro conditions. In response to in vitro stress, transcript level of VvChit-IV increased in embryogenic calli and cell suspensions and peaked at 1.5 and 3 folds, respectively, when compared to an internal reference gene. Evidence of tissue culture stress-induced endochitinase was reported here for the first time indicating that in vitro stress could mitigate elicitor application to induce chitinase expression and can stimulate an immune response against abiotic constraints. Data showed that up-regulation of VvChit-IV was associated with a substantial increase of H2O2 and proline without significant change in malondialdehyde content suggesting that the H2O2 signaling network might trigger a priming effect to boost the defense response against environmental stress. Endochitinase activation in plant stress mitigation was thus highlighted to improve tolerance through attenuation of oxidative stress. This study revealed that the grapevine endochitinase is promising for enhancing coping-oriented adaptation and abiotic stress tolerance, which gives new insights into its feasibility for use in cross-tolerance and crop improvement.
Collapse
Affiliation(s)
- Anis Ben-Amar
- Department of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Science and Technology Park, P.O. Box. 901, 2050, Hammam-Lif, Tunisia.
| | - Dorsaf Allel
- Department of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Science and Technology Park, P.O. Box. 901, 2050, Hammam-Lif, Tunisia
| | - Ahmed Mliki
- Department of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Science and Technology Park, P.O. Box. 901, 2050, Hammam-Lif, Tunisia
| |
Collapse
|
4
|
Ben-Amar A, Mliki A. Timely gene detection assay and reliable screening of genetically engineered plants using an improved direct PCR-based technology. Transgenic Res 2021; 30:263-274. [PMID: 33880718 DOI: 10.1007/s11248-021-00250-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/28/2021] [Indexed: 10/21/2022]
Abstract
Engineered plants have been widely produced for fundamental and practical use. Several methods have been developed for genetically modified crop detection and quantification; however; they still laborious and expensive. Efforts are needed to set-up diagnosis-oriented techniques as alternatives to overcome DNA extraction which remains a tedious and time-consuming procedure. Here, we established a standard direct PCR workflow using a regular Taq polymerase without prior DNA purification over a wide range of plant species. Only a small amount of fresh tissue allowed direct amplification of target gene sequences. Evaluation of accuracy, sensitivity, and reproducibility of direct PCR assay was investigated for proof-of-concept, and subsequently applied to gene detection assays and rapid transgenic revealing. The newly established method achieved full success and has amplified constitutive housekeeping genes from several plant specimens in a reproducible manner with high-quality sequencing profiles. In our case, the screening of transgenic plants confirmed that both the gfp-ER reporter gene and the npt II selectable marker were integrated into the plant genome. This direct PCR approach provides a powerful tool for large-scale PCR-based gene detection making DNA purification irrelevant. It could be easily implemented for downstream applications in the field of genetic fingerprinting, plant biotechnology, and functional genomics.
Collapse
Affiliation(s)
- Anis Ben-Amar
- Department of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Science and Technology Park, P.O. Box. 901, 2050, Hammam-Lif, Tunisia.
| | - Ahmed Mliki
- Department of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Science and Technology Park, P.O. Box. 901, 2050, Hammam-Lif, Tunisia
| |
Collapse
|
5
|
Sabbadini S, Capriotti L, Molesini B, Pandolfini T, Navacchi O, Limera C, Ricci A, Mezzetti B. Comparison of regeneration capacity and Agrobacterium-mediated cell transformation efficiency of different cultivars and rootstocks of Vitis spp. via organogenesis. Sci Rep 2019; 9:582. [PMID: 30679725 PMCID: PMC6345860 DOI: 10.1038/s41598-018-37335-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 11/30/2018] [Indexed: 12/20/2022] Open
Abstract
The success of in vitro plant regeneration and the competence of genetic transformation greatly depends on the genotype of the species of interest. In previous work, we developed a method for the efficient Agrobacterium-mediated genetic transformation via organogenesis of V. vinifera cultivar Thompson Seedless, by using meristematic bulk (MB) as starting tissue. In this study, we applied this method for the regeneration and transformation of MBs obtained from the Italian cultivar Ciliegiolo and two of the commonly used Vitis rootstocks, 110 Richter and Kober 5BB, in comparison with Thompson Seedless. The A. tumefaciens strain EHA105, harbouring pK7WG2 binary vector, was used for the transformation trials, which allowed selection through the enhanced-green fluorescent protein (eGFP) and the neomycin phosphotransferase (nptII) gene. Putative transformed tissues and/or shoots were identified by either a screening based on the eGFP expression alone or its use in combination with kanamycin in the medium. MBs obtained from Thompson Seedless showed the highest regeneration and transformation cell competence, which subsequently allowed the recovery of stably transformed plants. Ciliegiolo, 110 Richter, and Kober 5BB, produced actively growing transgenic calli showing eGFP fluorescence, more consistently on selective media, but had no regenerative competence.
Collapse
Affiliation(s)
- S Sabbadini
- Department of Agricultural, Food and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - L Capriotti
- Department of Agricultural, Food and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - B Molesini
- Department of Biotechnology, University of Verona, Verona, Italy
| | - T Pandolfini
- Department of Biotechnology, University of Verona, Verona, Italy
| | | | - C Limera
- Department of Agricultural, Food and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - A Ricci
- Department of Agricultural, Food and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - B Mezzetti
- Department of Agricultural, Food and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy.
| |
Collapse
|
6
|
San Pedro T, Gammoudi N, Peiró R, Olmos A, Gisbert C. Somatic embryogenesis from seeds in a broad range of Vitis vinifera L. varieties: rescue of true-to-type virus-free plants. BMC PLANT BIOLOGY 2017; 17:226. [PMID: 29187140 PMCID: PMC5706158 DOI: 10.1186/s12870-017-1159-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 11/08/2017] [Indexed: 05/27/2023]
Abstract
BACKGROUND Somatic embryogenesis is the preferred method for cell to plant regeneration in Vitis vinifera L. However, low frequencies of plant embryo conversion are commonly found. In a previous work we obtained from cut-seeds of a grapevine infected with the Grapevine leafroll associated viruses 1 and 3 (GLRaV-1 and GLRaV-3), high rates of direct regeneration, embryo plant conversion and sanitation. The aim of this study is to evaluate the usefulness of this procedure for regeneration of other grapevine varieties which include some infected with one to three common grapevine viruses (GLRaV-3, Grapevine fanleaf virus (GFLV) and Grapevine fleck virus (GFkV)). As grapevine is highly heterozygous, it was necessary to select from among the virus-free plants those that regenerated from mother tissues around the embryo, (true-to-type). RESULTS Somatic embryogenesis and plant regeneration were achieved in a first experiment, using cut-seeds from the 14 grapevine varieties Airén, Cabernet Franc, Cabernet Sauvignon, Mencía, Merlot, Monastrell, Petit Verdot, Pinot Blanc (infected by GFLV and GFkV), Pinot Gris, Pinot Meunier, Pinot Noir, Syrah, Tempranillo (infected by GFLV), and Verdil. All regenerated plants were confirmed to be free of GFkV whereas at least 68% sanitation was obtained for GFLV. The SSR profiles of the virus-free plants showed, in both varieties, around 10% regeneration from mother tissue (the same genetic make-up as the mother plant). In a second experiment, this procedure was used to sanitize the varieties Cabernet Franc, Godello, Merlot and Valencí Blanc infected by GLRaV-3, GFkV and/or GFLV. CONCLUSIONS Cut-seeds can be used as explants for embryogenesis induction and plant conversion in a broad range of grapevine varieties. The high regeneration rates obtained with this procedure facilitate the posterior selection of true-to-type virus-free plants. A sanitation rate of 100% was obtained for GFkV as this virus is not seed-transmitted. However, the presence of GLRaV-3 and GFLV in some of the regenerated plants showed that both viruses are seed-transmitted. The regeneration of true-to-type virus-free plants from all infected varieties indicates that this methodology may represent an alternative procedure for virus cleaning in grapevine.
Collapse
Affiliation(s)
- Tània San Pedro
- Instituto Valenciano de Investigaciones Agrarias (IVIA), Centro de Protección Vegetal y Biotecnología, Carretera de Moncada a Náquera km 4.5, 46113 Moncada, Spain
| | - Najet Gammoudi
- Arid and Oases Cropping Laboratory, Arid Lands Institute (IRA), 4119 Medenine, Tunisia
| | - Rosa Peiró
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana (COMAV), Universitat Politècnica de València, Camino de Vera, 14, 46022 Valencia, Spain
| | - Antonio Olmos
- Instituto Valenciano de Investigaciones Agrarias (IVIA), Centro de Protección Vegetal y Biotecnología, Carretera de Moncada a Náquera km 4.5, 46113 Moncada, Spain
| | - Carmina Gisbert
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana (COMAV), Universitat Politècnica de València, Camino de Vera, 14, 46022 Valencia, Spain
| |
Collapse
|
7
|
Steinmacher DA, Saare-Surminski K, Lieberei R. Arabinogalactan proteins and the extracellular matrix surface network during peach palm somatic embryogenesis. PHYSIOLOGIA PLANTARUM 2012; 146:336-49. [PMID: 22574975 DOI: 10.1111/j.1399-3054.2012.01642.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Somatic embryogenesis has been described in peach palm as a reliable method for its in vitro multiplication and conservation. In this study, we evaluated the possible role of arabinogalactan proteins (AGPs) during this morphogenetic pathway. The presence of Yariv reagent, a synthesized chemical antibody that specifically binds AGP molecules, affected somatic embryos and callus development rate, but no effect was observed on fresh weight increment. This substance also had profound effects on embryo morphology: somatic embryos presented loose cells in the protoderm and no signs of polarization could be observed. To better evaluate the role of AGPs, analyses of specific monoclonal antibodies (MAbs) against different AGP epitopes revealed a specific pattern of distribution for each epitope. MAb JIM13 had differential expression and showed intense signal on the embryogenic sector and some immediately adjacent layers. MAb JIM7 against pectin recognized cell walls and a specific layer over the developing somatic embryo, as well as over the shoot meristem region of mature somatic embryos. This corresponds to an extracellular matrix surface network (ECMSN) associated with the development of somatic embryos and closely related to the expression of MAb JIM13. Scanning electron microscopy confirmed the presence of an ECMSN covering a specific group of cells and ultra-structural analyses revealed that the ECMSN had lipophilic substances.
Collapse
Affiliation(s)
- Douglas A Steinmacher
- Department of Crop Science and Plant Ecology, Biocentre Klein Flottbek and Botanical Garden, University Hamburg, Ohnhorststr. 18, 22609 Hamburg, Germany.
| | | | | |
Collapse
|
8
|
Poon S, Heath RL, Clarke AE. A chimeric arabinogalactan protein promotes somatic embryogenesis in cotton cell culture. PLANT PHYSIOLOGY 2012; 160:684-95. [PMID: 22858635 PMCID: PMC3461548 DOI: 10.1104/pp.112.203075] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 07/30/2012] [Indexed: 05/05/2023]
Abstract
Arabinogalactan proteins (AGPs) are a family of extracellular plant proteoglycans implicated in many aspects of plant growth and development, including in vitro somatic embryogenesis (SE). We found that specific AGPs were produced by cotton (Gossypium hirsutum) calli undergoing SE and that when these AGPs were isolated and incorporated into tissue culture medium, cotton SE was promoted. When the AGPs were partly or fully deglycosylated, SE-promoting activity was not diminished. Testing of AGPs separated by reverse-phase high-performance liquid chromatography revealed that the SE-promoting activity resided in a hydrophobic fraction. We cloned a full-length complementary DNA (cotton PHYTOCYANIN-LIKE ARABINOGALACTAN-PROTEIN1 [GhPLA1]) that encoded the protein backbone of an AGP in the active fraction. It has a chimeric structure comprising an amino-terminal signal sequence, a phytocyanin-like domain, an AGP-like domain, and a hydrophobic carboxyl-terminal domain. Recombinant production of GhPLA1 in tobacco (Nicotiana tabacum) cells enabled us to purify and analyze a single glycosylated AGP and to demonstrate that this chimeric AGP promotes cotton SE. Furthermore, the nonglycosylated phytocyanin-like domain from GhPLA1, which was bacterially produced, also promoted SE, indicating that the glycosylated AGP domain was unnecessary for in vitro activity.
Collapse
Affiliation(s)
- Simon Poon
- School of Botany, University of Melbourne, Victoria 3010, Australia.
| | | | | |
Collapse
|
9
|
Novák E, Zok A, Forgács I, Pedryc A, Oláh R. Evaluation of regeneration capacity in grape towards the improvement of new cultivars with enhanced berry and wine quality. ACTA ALIMENTARIA 2011. [DOI: 10.1556/aalim.40.2011.suppl.14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
10
|
Somatic embryogenesis and histological analysis from zygotic embryos in Vitis vinifera L. ‘Moldova’. ACTA ACUST UNITED AC 2008. [DOI: 10.1007/s11632-008-0040-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|