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Gambino G, Nuzzo F, Moine A, Chitarra W, Pagliarani C, Petrelli A, Boccacci P, Delliri A, Velasco R, Nerva L, Perrone I. Genome editing of a recalcitrant wine grape genotype by lipofectamine-mediated delivery of CRISPR/Cas9 ribonucleoproteins to protoplasts. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024. [PMID: 38646817 DOI: 10.1111/tpj.16770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/29/2024] [Accepted: 04/04/2024] [Indexed: 04/23/2024]
Abstract
The main bottleneck in the application of biotechnological breeding methods to woody species is due to the in vitro regeneration recalcitrance shown by several genotypes. On the other side, woody species, especially grapevine (Vitis vinifera L.), use most of the pesticides and other expensive inputs in agriculture, making the development of efficient approaches of genetic improvement absolutely urgent. Genome editing is an extremely promising technique particularly for wine grape genotypes, as it allows to modify the desired gene in a single step, preserving all the quality traits selected and appreciated in elite varieties. A genome editing and regeneration protocol for the production of transgene-free grapevine plants, exploiting the lipofectamine-mediated direct delivery of CRISPR-Cas9 ribonucleoproteins (RNPs) to target the phytoene desaturase gene, is reported. We focused on Nebbiolo (V. vinifera), an extremely in vitro recalcitrant wine genotype used to produce outstanding wines, such as Barolo and Barbaresco. The use of the PEG-mediated editing method available in literature and employed for highly embryogenic grapevine genotypes did not allow the proper embryo development in the recalcitrant Nebbiolo. Lipofectamines, on the contrary, did not have a negative impact on protoplast viability and plant regeneration, leading to the obtainment of fully developed edited plants after about 5 months from the transfection. Our work represents one of the first examples of lipofectamine use for delivering editing reagents in plant protoplasts. The important result achieved for the wine grape genotype breeding could be extended to other important wine grape varieties and recalcitrant woody species.
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Affiliation(s)
- Giorgio Gambino
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
| | - Floriana Nuzzo
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
| | - Amedeo Moine
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
| | - Walter Chitarra
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
- Research Centre for Viticulture and Enology, Council for Agricultural Research and Economics (CREA-VE), Via XXVIII Aprile 26, 31015, Conegliano, Italy
| | - Chiara Pagliarani
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
| | - Annalisa Petrelli
- Open Laboratory - Department of Veterinary Sciences, University of Turin (DSV-UNITO), Largo Paolo Braccini 2, 10095, Grugliasco, Italy
| | - Paolo Boccacci
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
| | - Andrea Delliri
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
| | - Riccardo Velasco
- Research Centre for Viticulture and Enology, Council for Agricultural Research and Economics (CREA-VE), Via XXVIII Aprile 26, 31015, Conegliano, Italy
| | - Luca Nerva
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
- Research Centre for Viticulture and Enology, Council for Agricultural Research and Economics (CREA-VE), Via XXVIII Aprile 26, 31015, Conegliano, Italy
| | - Irene Perrone
- Institute for Sustainable Plant Protection, National Research Council (CNR-IPSP), Strada delle Cacce, 73, 10135, Torino, Italy
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Djennane S, Gersch S, Le-Bohec F, Piron MC, Baltenweck R, Lemaire O, Merdinoglu D, Hugueney P, Nogué F, Mestre P. CRISPR/Cas9 editing of Downy mildew resistant 6 (DMR6-1) in grapevine leads to reduced susceptibility to Plasmopara viticola. JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:2100-2112. [PMID: 38069501 DOI: 10.1093/jxb/erad487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/04/2023] [Indexed: 03/28/2024]
Abstract
Downy mildew of grapevine (Vitis vinifera), caused by the oomycete Plasmopara viticola, is an important disease that is present in cultivation areas worldwide, and using resistant varieties provides an environmentally friendly alternative to fungicides. DOWNY MILDEW RESISTANT 6 (DMR6) from Arabidopsis is a negative regulator of plant immunity and its loss of function confers resistance to downy mildew. In grapevine, DMR6 is present in two copies, named VvDMR6-1 and VvDMR6-2. Here, we describe the editing of VvDMR6-1 in embryogenic calli using CRISPR/Cas9 and the regeneration of the edited plants. All edited plants were found to be biallelic and chimeric, and whilst they all showed reduced growth compared with non-transformed control plants, they also had reduced susceptibility to P. viticola. Comparison between mock-inoculated genotypes showed that all edited lines presented higher levels of salicylic acid than controls, and lines subjected to transformation presented higher levels of cis-resveratrol than controls. Our results identify VvDMR6-1 as a promising target for breeding grapevine cultivars with improved resistance to downy mildew.
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Affiliation(s)
- Samia Djennane
- INRAE, Université de Strasbourg, UMR SVQV, 68000 Colmar, France
| | - Sophie Gersch
- INRAE, Université de Strasbourg, UMR SVQV, 68000 Colmar, France
| | | | | | | | - Olivier Lemaire
- INRAE, Université de Strasbourg, UMR SVQV, 68000 Colmar, France
| | | | | | - Fabien Nogué
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000 Versailles, France
| | - Pere Mestre
- INRAE, Université de Strasbourg, UMR SVQV, 68000 Colmar, France
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Villette J, Lecourieux F, Bastiancig E, Héloir MC, Poinssot B. New improvements in grapevine genome editing: high efficiency biallelic homozygous knock-out from regenerated plantlets by using an optimized zCas9i. PLANT METHODS 2024; 20:45. [PMID: 38500114 PMCID: PMC10949784 DOI: 10.1186/s13007-024-01173-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 03/10/2024] [Indexed: 03/20/2024]
Abstract
BACKGROUND For ten years, CRISPR/cas9 system has become a very useful tool for obtaining site-specific mutations on targeted genes in many plant organisms. This technology opens up a wide range of possibilities for improved plant breeding in the future. In plants, the CRISPR/Cas9 system is mostly used through stable transformation with constructs that allow for the expression of the Cas9 gene and sgRNA. Numerous studies have shown that site-specific mutation efficiency can vary greatly between different plant species due to factors such as plant transformation efficiency, Cas9 expression, Cas9 nucleotide sequence, the addition of intronic sequences, and many other parameters. Since 2016, when the first edited grapevine was created, the number of studies using functional genomic approaches in grapevine has remained low due to difficulties with plant transformation and gene editing efficiency. In this study, we optimized the process to obtain site-specific mutations and generate knock-out mutants of grapevine (Vitis vinifera cv. 'Chardonnay'). Building on existing methods of grapevine transformation, we improved the method for selecting transformed plants at chosen steps of the developing process using fluorescence microscopy. RESULTS By comparison of two different Cas9 gene and two different promoters, we increased site-specific mutation efficiency using a maize-codon optimized Cas9 containing 13 introns (zCas9i), achieving up to 100% biallelic mutation in grapevine plantlets cv. 'Chardonnay'. These results are directly correlated with Cas9 expression level. CONCLUSIONS Taken together, our results highlight a complete methodology for obtaining a wide range of homozygous knock-out mutants for functional genomic studies and future breeding programs in grapevine.
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Affiliation(s)
- Jérémy Villette
- Agroécologie, INRAE, Institut Agro, Université de Bourgogne, Dijon, France
| | - Fatma Lecourieux
- UMR1287 EGFV, CNRS, Université de Bordeaux, INRAE, Bordeaux Sciences Agro, ISVV, Villenave d'Ornon, Dijon, France
| | - Eliot Bastiancig
- Agroécologie, INRAE, Institut Agro, Université de Bourgogne, Dijon, France
| | | | - Benoit Poinssot
- Agroécologie, INRAE, Institut Agro, Université de Bourgogne, Dijon, France.
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Maniatis EI, Karamichali I, Stefanidou E, Boutsika A, Tsitsigiannis DI, Paplomatas E, Madesis P, Zambounis A. Insights into the Transcriptional Reprogramming of Peach Leaves Inoculated with Taphrina deformans. PLANTS (BASEL, SWITZERLAND) 2024; 13:861. [PMID: 38592856 PMCID: PMC10976055 DOI: 10.3390/plants13060861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 04/11/2024]
Abstract
The dimorphic fungus Taphrina deformans is the causal agent of peach leaf curl disease, which affects leaves, flowers, and fruits. An RNA-seq approach was employed to gain insights into the transcriptional reprogramming of a peach cultivar during leaf inoculation with the yeast phase of the fungus across a compatible interaction. The results uncovered modulations of specific peach differentially expressed genes (DEGs) in peaches and pathways related to either the induction of host defense responses or pathogen colonization and disease spread. Expression profiles of DEGs were shown to be highly time-dependent and related to the presence of the two forms of the fungal growth, the inoculated yeast form and the later biotrophic phase during mycelial development. In parallel, this differential reprogramming was consistent with a diphasic detection of fungal load in the challenged leaves over the 120 h after inoculation (HAI) period. Leaf defense responses either occurred during the early yeast phase inoculation at 24 HAI, mediated primarily by cell wall modification processes, or more pronouncedly during the biotrophic phase at 72 HAI, as revealed by the activation of DEGs related to pathogen perception, signaling transduction, and secondary metabolism towards restraining further hypha proliferation. On the contrary, the expression patterns of specific DEGs at 120 HAI might further contribute to host susceptibility. These findings will further allow us to elucidate the molecular responses beyond the peach-T. deformans interaction.
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Affiliation(s)
- Elissaios I. Maniatis
- Laboratory of Plant Pathology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Ioanna Karamichali
- Laboratory of Agrobiotechnology and Molecular Plant Breeding, Institute of Applied Biosciences (INAB), Center for Research and Technology (CERTH), 57001 Thessaloniki, Greece
| | - Eleni Stefanidou
- Laboratory of Agrobiotechnology and Molecular Plant Breeding, Institute of Applied Biosciences (INAB), Center for Research and Technology (CERTH), 57001 Thessaloniki, Greece
| | - Anastasia Boutsika
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organization Demeter, 57001 Thessaloniki, Greece
| | - Dimitrios I. Tsitsigiannis
- Laboratory of Plant Pathology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Epaminondas Paplomatas
- Laboratory of Plant Pathology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Panagiotis Madesis
- Laboratory of Agrobiotechnology and Molecular Plant Breeding, Institute of Applied Biosciences (INAB), Center for Research and Technology (CERTH), 57001 Thessaloniki, Greece
- Laboratory of Molecular Biology of Plants, Department of Agriculture Crop Production and Rural Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, Greece
| | - Antonios Zambounis
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organization Demeter, 57001 Thessaloniki, Greece
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Yang D, Chen Y, Wang R, He Y, Ma X, Shen J, He Z, Lai H. Effects of Exogenous Abscisic Acid on the Physiological and Biochemical Responses of Camellia oleifera Seedlings under Drought Stress. PLANTS (BASEL, SWITZERLAND) 2024; 13:225. [PMID: 38256779 PMCID: PMC11154478 DOI: 10.3390/plants13020225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/05/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024]
Abstract
This study comprehensively investigates the physiological and molecular regulatory mechanisms of Camellia oleifera seedlings under drought stress with a soil moisture content of about 30%, where exogenous abscisic acid (ABA) was applied via foliar spraying at concentrations of 50 µg/L, 100 µg/L, and 200 µg/L. The results demonstrated that appropriate concentrations of ABA treatment can regulate the physiological state of the seedlings through multiple pathways, including photosynthesis, oxidative stress response, and osmotic balance, thereby aiding in the restructuring of their drought response strategy. ABA treatment effectively activated the antioxidant system by reducing stomatal conductance and moderately inhibiting the photosynthetic rate, thus alleviating oxidative damage caused by drought stress. Additionally, ABA treatment promoted the synthesis of osmotic regulators such as proline, maintaining cellular turgor stability and enhancing the plant's drought adaptability. The real-time quantitative PCR results of related genes indicated that ABA treatment enhanced the plant's response to the ABA signaling pathway and improved disease resistance by regulating the expression of related genes, while also enhancing membrane lipid stability. A comprehensive evaluation using a membership function approach suggested that 50 µg/L ABA treatment may be the most-effective in mitigating drought effects in practical applications, followed by 100 µg/L ABA. The application of 50 µg/L ABA for 7 h induced significant changes in various biochemical parameters, compared to a foliar water spray. Notably, superoxide dismutase activity increased by 17.94%, peroxidase activity by 30.27%, glutathione content by 12.41%, and proline levels by 25.76%. The content of soluble sugars and soluble proteins rose by 14.79% and 87.95%, respectively. Additionally, there was a significant decrease of 31.15% in the malondialdehyde levels.
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Affiliation(s)
- Dayu Yang
- School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (D.Y.); (Y.H.); (X.M.); (J.S.)
- Research Institute of Oil Tea Camellia, Hunan Academy of Forestry, Changsha 410004, China; (Y.C.); (R.W.)
| | - Yongzhong Chen
- Research Institute of Oil Tea Camellia, Hunan Academy of Forestry, Changsha 410004, China; (Y.C.); (R.W.)
- National Engineering Research Center for Oil-Tea Camellia, State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410116, China
| | - Rui Wang
- Research Institute of Oil Tea Camellia, Hunan Academy of Forestry, Changsha 410004, China; (Y.C.); (R.W.)
- National Engineering Research Center for Oil-Tea Camellia, State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410116, China
| | - Yimin He
- School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (D.Y.); (Y.H.); (X.M.); (J.S.)
- Research Institute of Oil Tea Camellia, Hunan Academy of Forestry, Changsha 410004, China; (Y.C.); (R.W.)
| | - Xiaofan Ma
- School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (D.Y.); (Y.H.); (X.M.); (J.S.)
- Research Institute of Oil Tea Camellia, Hunan Academy of Forestry, Changsha 410004, China; (Y.C.); (R.W.)
| | - Jiancai Shen
- School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (D.Y.); (Y.H.); (X.M.); (J.S.)
- Research Institute of Oil Tea Camellia, Hunan Academy of Forestry, Changsha 410004, China; (Y.C.); (R.W.)
| | - Zhilong He
- Research Institute of Oil Tea Camellia, Hunan Academy of Forestry, Changsha 410004, China; (Y.C.); (R.W.)
- National Engineering Research Center for Oil-Tea Camellia, State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410116, China
| | - Hanggui Lai
- School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (D.Y.); (Y.H.); (X.M.); (J.S.)
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