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Olivares F, Loyola R, Olmedo B, Miccono MDLÁ, Aguirre C, Vergara R, Riquelme D, Madrid G, Plantat P, Mora R, Espinoza D, Prieto H. CRISPR/Cas9 Targeted Editing of Genes Associated With Fungal Susceptibility in Vitis vinifera L. cv. Thompson Seedless Using Geminivirus-Derived Replicons. FRONTIERS IN PLANT SCIENCE 2021; 12:791030. [PMID: 35003180 PMCID: PMC8733719 DOI: 10.3389/fpls.2021.791030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/29/2021] [Indexed: 05/14/2023]
Abstract
The woody nature of grapevine (Vitis vinifera L.) has hindered the development of efficient gene editing strategies to improve this species. The lack of highly efficient gene transfer techniques, which, furthermore, are applied in multicellular explants such as somatic embryos, are additional technical handicaps to gene editing in the vine. The inclusion of geminivirus-based replicons in regular T-DNA vectors can enhance the expression of clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 (CRISPR/Cas9) elements, thus enabling the use of these multicellular explants as starting materials. In this study, we used Bean yellow dwarf virus (BeYDV)-derived replicon vectors to express the key components of CRISPR/Cas9 system in vivo and evaluate their editing capability in individuals derived from Agrobacterium-mediated gene transfer experiments of 'Thompson Seedless' somatic embryos. Preliminary assays using a BeYDV-derived vector for green fluorescent protein reporter gene expression demonstrated marker visualization in embryos for up to 33 days post-infiltration. A universal BeYDV-based vector (pGMV-U) was assembled to produce all CRISPR/Cas9 components with up to four independent guide RNA (gRNA) expression cassettes. With a focus on fungal tolerance, we used gRNA pairs to address considerably large deletions of putative grape susceptibility genes, including AUXIN INDUCED IN ROOT CULTURE 12 (VviAIR12), SUGARS WILL EVENTUALLY BE EXPORTED TRANSPORTER 4 (VviSWEET4), LESION INITIATION 2 (VviLIN2), and DIMERIZATION PARTNER-E2F-LIKE 1 (VviDEL1). The editing functionality of gRNA pairs in pGMV-U was evaluated by grapevine leaf agroinfiltration assays, thus enabling longer-term embryo transformations. These experiments allowed for the establishment of greenhouse individuals exhibiting a double-cut edited status for all targeted genes under different allele-editing conditions. After approximately 18 months, the edited grapevine plants were preliminary evaluated regarding its resistance to Erysiphe necator and Botrytis cinerea. Assays have shown that a transgene-free VviDEL1 double-cut edited line exhibits over 90% reduction in symptoms triggered by powdery mildew infection. These results point to the use of geminivirus-based replicons for gene editing in grapevine and other relevant fruit species.
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Affiliation(s)
- Felipe Olivares
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Rodrigo Loyola
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Blanca Olmedo
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - María de los Ángeles Miccono
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Carlos Aguirre
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Ricardo Vergara
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Danae Riquelme
- Phytopathology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Gabriela Madrid
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Philippe Plantat
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Roxana Mora
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Daniel Espinoza
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
| | - Humberto Prieto
- Biotechnology Laboratory, La Platina Research Station, National Institute of Agriculture Research, Santiago, Chile
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Egertsdotter U, Ahmad I, Clapham D. Automation and Scale Up of Somatic Embryogenesis for Commercial Plant Production, With Emphasis on Conifers. FRONTIERS IN PLANT SCIENCE 2019; 10:109. [PMID: 30833951 PMCID: PMC6388443 DOI: 10.3389/fpls.2019.00109] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 01/23/2019] [Indexed: 05/19/2023]
Abstract
For large scale production of clonal plants, somatic embryogenesis (SE) has many advantages over other clonal propagation methods such as the rooting of cuttings. In particular, the SE process is more suited to scale up and automation, thereby reducing labor costs and increasing the reliability of the production process. Furthermore, the plants resulting from SE closely resemble those from seeds, as somatic embryos, like zygotic (seed) embryos, develop with good connection between root and shoot, and without the plagiotropism often associated with propagation by cuttings. For practical purposes in breeding programs and for deployment of elite clones, it is valuable that a virtually unlimited number of SE plants can be generated from one original seed embryo; and SE cultures (clones) can be cryostored for at least 20 years, allowing long-term testing of clones. To date, there has however been limited use of SE for large-scale plant production mainly because without automation it is labor-intensive. Development of automation is particularly attractive in countries with high labor costs, where conifer forestry is often of great economic importance. Various approaches for automating SE processes are under investigation and the progress is reviewed here, with emphasis on conifers. These approaches include simplification of culture routines with preference for liquid rather than solid cultures, use of robotics and automation for the harvest of selected individual mature embryos, followed by automated handling of germination and subsequent planting. Different approaches to handle the processes of somatic embryogenesis in conifers are outlined below, followed by an update on efforts to automate the different steps, which are nearing an operational stage.
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Affiliation(s)
- Ulrika Egertsdotter
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden
- G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
- *Correspondence: Ulrika Egertsdotter
| | - Iftikhar Ahmad
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - David Clapham
- Department of Plant Biology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Valdiani A, Hansen OK, Nielsen UB, Johannsen VK, Shariat M, Georgiev MI, Omidvar V, Ebrahimi M, Tavakoli Dinanai E, Abiri R. Bioreactor-based advances in plant tissue and cell culture: challenges and prospects. Crit Rev Biotechnol 2018; 39:1-15. [PMID: 30431379 DOI: 10.1080/07388551.2018.1489778] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 05/29/2018] [Accepted: 06/04/2018] [Indexed: 12/13/2022]
Abstract
Bioreactors are engineered systems capable of supporting a biologically active situation for conducting aerobic or anaerobic biochemical processes. Stability, operational ease, improved nutrient uptake capacity, time- and cost-effectiveness, and large quantities of biomass production, make bioreactors suitable alternatives to conventional plant tissue and cell culture (PTCC) methods. Bioreactors are employed in a wide range of plant research, and have evolved over time. Such technological progress, has led to remarkable achievements in the field of PTCC. Since the classification of bioreactors has been extensively reviewed in numerous reviews, the current article avoids repeating the same material. Alternatively, it aims to highlight the principal advances in the bioreactor hardware s used in PTCC rather than classical categorization. Furthermore, our review summarizes the most significant steps as well as current state-of-the-art of PTCC carried out in various types of bioreactor.
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Affiliation(s)
- Alireza Valdiani
- a Department of Geosciences and Natural Resource Management, Section for Forest, Nature and Biomass, Faculty of Science , University of Copenhagen , Frederiksberg C 1958 , Denmark
| | - Ole Kim Hansen
- a Department of Geosciences and Natural Resource Management, Section for Forest, Nature and Biomass, Faculty of Science , University of Copenhagen , Frederiksberg C 1958 , Denmark
| | - Ulrik Braüner Nielsen
- a Department of Geosciences and Natural Resource Management, Section for Forest, Nature and Biomass, Faculty of Science , University of Copenhagen , Frederiksberg C 1958 , Denmark
| | - Vivian Kvist Johannsen
- a Department of Geosciences and Natural Resource Management, Section for Forest, Nature and Biomass, Faculty of Science , University of Copenhagen , Frederiksberg C 1958 , Denmark
| | - Maryam Shariat
- b Department of Food Science, Faculty of Food Science and Technology , Universiti Putra Malaysia , Serdang , Selangor 43400 UPM , Malaysia
| | - Milen I Georgiev
- c Institute of Microbiology , Bulgarian Academy of Sciences , Plovdiv 4000 , Bulgaria
| | - Vahid Omidvar
- d Department of Plant Pathology , University of Minnesota , St Paul , MN 55108 , USA
| | - Mortaza Ebrahimi
- e Department of Plant Tissue Culture , Agriculture Biotechnology Research Institute of Iran - Central Region Branch , Isfahan , Iran
| | | | - Rambod Abiri
- g Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences , Universiti Putra Malaysia , Serdang , Selangor DE 43400 UPM , Malaysia
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Rubio J, Montes C, Castro Á, Álvarez C, Olmedo B, Muñoz M, Tapia E, Reyes F, Ortega M, Sánchez E, Miccono M, Dalla Costa L, Martinelli L, Malnoy M, Prieto H. Genetically engineered Thompson Seedless grapevine plants designed for fungal tolerance: selection and characterization of the best performing individuals in a field trial. Transgenic Res 2014; 24:43-60. [PMID: 25011563 DOI: 10.1007/s11248-014-9811-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 06/12/2014] [Indexed: 11/29/2022]
Abstract
The fungi Botrytis cinerea and Erysiphe necator are responsible for gray mold and powdery mildew diseases, respectively, which are among the most devastating diseases of grapes. Two endochitinase (ech42 and ech33) genes and one N-acetyl-β-D-hexosaminidase (nag70) gene from biocontrol agents related to Trichoderma spp. were used to develop a set of 103 genetically modified (GM) 'Thompson Seedless' lines (568 plants) that were established in open field in 2004 and evaluated for fungal tolerance starting in 2006. Statistical analyses were carried out considering transgene, explant origin, and plant response to both fungi in the field and in detached leaf assays. The results allowed for the selection of the 19 consistently most tolerant lines through two consecutive years (2007-2008 and 2008-2009 seasons). Plants from these lines were grafted onto the rootstock Harmony and established in the field in 2009 for further characterization. Transgene status was shown in most of these lines by Southern blot, real-time PCR, ELISA, and immunostrips; the most tolerant candidates expressed the ech42-nag70 double gene construct and the ech33 gene from a local Hypocrea virens isolate. B. cinerea growth assays in Petri dishes supplemented with berry juices extracted from the most tolerant individuals of the selected population was inhibited. These results demonstrate that improved fungal tolerance can be attributed to transgene expression and support the iterative molecular and physiological phenotyping in order to define selected individuals from a population of GM grapevines.
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Affiliation(s)
- Julia Rubio
- Plant Sciences Master Program, Agricultural Sciences Department, Universidad de Chile, Santiago, Chile
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Ferri M, Dipalo SC, Bagni N, Tassoni A. Chitosan elicits mono-glucosylated stilbene production and release in fed-batch bioreactor cultures of grape cells. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.07.114] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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