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Pigolev AV, Miroshnichenko DN, Dolgov SV, Alekseeva VV, Pushin AS, Degtyaryova VI, Klementyeva A, Gorbach D, Leonova T, Basnet A, Frolov AA, Savchenko TV. Endogenously Produced Jasmonates Affect Leaf Growth and Improve Osmotic Stress Tolerance in Emmer Wheat. Biomolecules 2023; 13:1775. [PMID: 38136646 PMCID: PMC10742046 DOI: 10.3390/biom13121775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 11/20/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
In light of recent climate change, with its rising temperatures and precipitation changes, we are facing the need to increase the valuable crop's tolerance against unfavorable environmental conditions. Emmer wheat is a cereal crop with high nutritional value. We investigated the possibility of improving the stress tolerance of emmer wheat by activating the synthesis of the stress hormone jasmonate by overexpressing two genes of the jasmonate biosynthetic pathway from Arabidopsis thaliana, ALLENE OXIDE SYNTHASE (AtAOS) and OXOPHYTODIENOATE REDUCTASE 3 (AtOPR3). Analyses of jasmonates in intact and mechanically wounded leaves of non-transgenic and transgenic plants showed that the overexpression of each of the two genes resulted in increased wounding-induced levels of jasmonic acid and jasmonate-isoleucine. Against all expectations, the overexpression of AtAOS, encoding a chloroplast-localized enzyme, does not lead to an increased level of the chloroplast-formed 12-oxo-phytodienoic acid (OPDA), suggesting an effective conversion of OPDA to downstream products in wounded emmer wheat leaves. Transgenic plants overexpressing AtAOS or AtOPR3 with increased jasmonate levels show a similar phenotype, manifested by shortening of the first and second leaves and elongation of the fourth leaf, as well as increased tolerance to osmotic stress induced by the presence of the polyethylene glycol (PEG) 6000.
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Affiliation(s)
- Alexey V. Pigolev
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.V.P.); (D.N.M.)
| | - Dmitry N. Miroshnichenko
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.V.P.); (D.N.M.)
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.V.D.); (V.V.A.); (A.S.P.); (V.I.D.); (A.K.)
| | - Sergey V. Dolgov
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.V.D.); (V.V.A.); (A.S.P.); (V.I.D.); (A.K.)
| | - Valeria V. Alekseeva
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.V.D.); (V.V.A.); (A.S.P.); (V.I.D.); (A.K.)
| | - Alexander S. Pushin
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.V.D.); (V.V.A.); (A.S.P.); (V.I.D.); (A.K.)
| | - Vlada I. Degtyaryova
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.V.D.); (V.V.A.); (A.S.P.); (V.I.D.); (A.K.)
| | - Anna Klementyeva
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (S.V.D.); (V.V.A.); (A.S.P.); (V.I.D.); (A.K.)
| | - Daria Gorbach
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (D.G.); (T.L.); (A.A.F.)
- Laboratory of Analytical Biochemistry and Biotechnology, Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, 127276 Moscow, Russia
| | - Tatiana Leonova
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (D.G.); (T.L.); (A.A.F.)
| | - Aditi Basnet
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (D.G.); (T.L.); (A.A.F.)
| | - Andrej A. Frolov
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (D.G.); (T.L.); (A.A.F.)
- Laboratory of Analytical Biochemistry and Biotechnology, Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, 127276 Moscow, Russia
| | - Tatyana V. Savchenko
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.V.P.); (D.N.M.)
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Ye X, Shrawat A, Moeller L, Rode R, Rivlin A, Kelm D, Martinell BJ, Williams EJ, Paisley A, Duncan DR, Armstrong CL. Agrobacterium-mediated direct transformation of wheat mature embryos through organogenesis. FRONTIERS IN PLANT SCIENCE 2023; 14:1202235. [PMID: 37324676 PMCID: PMC10264787 DOI: 10.3389/fpls.2023.1202235] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 05/11/2023] [Indexed: 06/17/2023]
Abstract
Transgenic plant production in monocotyledonous species has primarily relied on embryogenic callus induction from both immature and mature embryos as the pathway for plant regeneration. We have efficiently regenerated fertile transgenic wheat plants through organogenesis after Agrobacterium-mediated direct transformation of mechanically isolated mature embryos from field-grown seed. Centrifugation of the mature embryos in the presence of Agrobacterium was found to be essential for efficient T-DNA delivery to the relevant regenerable cells. The inoculated mature embryos formed multiple buds/shoots on high-cytokinin medium, which directly regenerated into transgenic shoots on hormone-free medium containing glyphosate for selection. Rooted transgenic plantlets were obtained within 10-12 weeks after inoculation. Further optimization of this transformation protocol resulted in significant reduction of chimeric plants to below 5%, as indicated by leaf GUS staining and T1 transgene segregation analysis. Direct transformation of wheat mature embryos has substantial advantages over traditional immature embryo-based transformation systems, including long-term storability of the mature dry explants, scalability, and greatly improved flexibility and consistency in transformation experiments.
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Degtyaryov E, Pigolev A, Miroshnichenko D, Frolov A, Basnet AT, Gorbach D, Leonova T, Pushin AS, Alekseeva V, Dolgov S, Savchenko T. 12-Oxophytodienoate Reductase Overexpression Compromises Tolerance to Botrytis cinerea in Hexaploid and Tetraploid Wheat. PLANTS (BASEL, SWITZERLAND) 2023; 12:2050. [PMID: 37653967 PMCID: PMC10222670 DOI: 10.3390/plants12102050] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 05/11/2023] [Accepted: 05/17/2023] [Indexed: 09/02/2023]
Abstract
12-Oxophytodienoate reductase is the enzyme involved in the biosynthesis of phytohormone jasmonates, which are considered to be the major regulators of plant tolerance to biotic challenges, especially necrotrophic pathogens. However, we observe compromised tolerance to the necrotrophic fungal pathogen Botrytis cinerea in transgenic hexaploid bread wheat and tetraploid emmer wheat plants overexpressing 12-OXOPHYTODIENOATE REDUCTASE-3 gene from Arabidopsis thaliana, while in Arabidopsis plants themselves, endogenously produced and exogenously applied jasmonates exert a strong protective effect against B. cinerea. Exogenous application of methyl jasmonate on hexaploid and tetraploid wheat leaves suppresses tolerance to B. cinerea and induces the formation of chlorotic damages. Exogenous treatment with methyl jasmonate in concentrations of 100 µM and higher causes leaf yellowing even in the absence of the pathogen, in agreement with findings on the role of jasmonates in the regulation of leaf senescence. Thereby, the present study demonstrates the negative role of the jasmonate system in hexaploid and tetraploid wheat tolerance to B. cinerea and reveals previously unknown jasmonate-mediated responses.
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Affiliation(s)
- Evgeny Degtyaryov
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (E.D.); (A.P.); (D.M.)
| | - Alexey Pigolev
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (E.D.); (A.P.); (D.M.)
| | - Dmitry Miroshnichenko
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (E.D.); (A.P.); (D.M.)
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.S.P.); (V.A.); (S.D.)
| | - Andrej Frolov
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (A.F.); (A.T.B.); (D.G.); (T.L.)
- Laboratory of Analytical Biochemistry and Biotechnology, Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, 127276 Moscow, Russia
| | - Adi Ti Basnet
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (A.F.); (A.T.B.); (D.G.); (T.L.)
| | - Daria Gorbach
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (A.F.); (A.T.B.); (D.G.); (T.L.)
| | - Tatiana Leonova
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (A.F.); (A.T.B.); (D.G.); (T.L.)
| | - Alexander S. Pushin
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.S.P.); (V.A.); (S.D.)
| | - Valeriya Alekseeva
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.S.P.); (V.A.); (S.D.)
| | - Sergey Dolgov
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.S.P.); (V.A.); (S.D.)
| | - Tatyana Savchenko
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (E.D.); (A.P.); (D.M.)
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Wang Y, Zeng J, Su P, Zhao H, Li L, Xie X, Zhang Q, Wu Y, Wang R, Zhang Y, Yu B, Chen M, Wang Y, Yang G, He G, Chang J, Li Y. An established protocol for generating transgenic wheat for wheat functional genomics via particle bombardment. FRONTIERS IN PLANT SCIENCE 2022; 13:979540. [PMID: 36570946 PMCID: PMC9772560 DOI: 10.3389/fpls.2022.979540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Wheat is one of the most important food crops in the world and is considered one of the top targets in crop biotechnology. With the high-quality reference genomes of wheat and its relative species and the recent burst of genomic resources in Triticeae, demands to perform gene functional studies in wheat and genetic improvement have been rapidly increasing, requiring that production of transgenic wheat should become a routine technique. While established for more than 20 years, the particle bombardment-mediated wheat transformation has not become routine yet, with only a handful of labs being proficient in this technique. This could be due to, at least partly, the low transformation efficiency and the technical difficulties. Here, we describe the current version of this method through adaptation and optimization. We report the detailed protocol of producing transgenic wheat by the particle gun, including several critical steps, from the selection of appropriate explants (i.e., immature scutella), the preparation of DNA-coated gold particles, and several established strategies of tissue culture. More importantly, with over 20 years of experience in wheat transformation in our lab, we share the many technical details and recommendations and emphasize that the particle bombardment-mediated approach has fewer limitations in genotype dependency and vector construction when compared with the Agrobacterium-mediated methods. The particle bombardment-mediated method has been successful for over 30 wheat genotypes, from the tetraploid durum wheat to the hexaploid common wheat, from modern elite varieties to landraces. In conclusion, the particle bombardment-mediated wheat transformation has demonstrated its potential and wide applications, and the full set of protocol, experience, and successful reports in many wheat genotypes described here will further its impacts, making it a routine and robust technique in crop research labs worldwide.
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Affiliation(s)
- Yaqiong Wang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Jian Zeng
- Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, Shaoguan, Guangdong, China
| | - Peipei Su
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Hongyan Zhao
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Li Li
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Xiaoxue Xie
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Qian Zhang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Ya’nan Wu
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Ruibin Wang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Yufan Zhang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Boju Yu
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Mingjie Chen
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Yuesheng Wang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Guangxiao Yang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Guangyuan He
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Junli Chang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Yin Li
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
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Miroshnichenko D, Timerbaev V, Klementyeva A, Pushin A, Sidorova T, Litvinov D, Nazarova L, Shulga O, Divashuk M, Karlov G, Salina E, Dolgov S. CRISPR/Cas9-induced modification of the conservative promoter region of VRN-A1 alters the heading time of hexaploid bread wheat. FRONTIERS IN PLANT SCIENCE 2022; 13:1048695. [PMID: 36544871 PMCID: PMC9760837 DOI: 10.3389/fpls.2022.1048695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/04/2022] [Indexed: 06/17/2023]
Abstract
In cereals, the vernalization-related gene network plays an important role in regulating the transition from the vegetative to the reproductive phase to ensure optimal reproduction in a temperate climate. In hexaploid bread wheat (Triticum aestivum L.), the spring growth habit is associated with the presence of at least one dominant locus of VERNALIZATION 1 gene (VRN-1), which usually differs from recessive alleles due to mutations in the regulatory sequences of the promoter or/and the first intron. VRN-1 gene is a key regulator of floral initiation; various combinations of dominant and recessive alleles, especially VRN-A1 homeologs, determine the differences in the timing of wheat heading/flowering. In the present study, we attempt to expand the types of VRN-A1 alleles using CRISPR/Cas9 targeted modification of the promoter sequence. Several mono- and biallelic changes were achieved within the 125-117 bp upstream sequence of the start codon of the recessive vrn-A1 gene in plants of semi-winter cv. 'Chinese Spring'. New mutations stably inherited in subsequent progenies and transgene-free homozygous plants carrying novel VRN-A1 variants were generated. Minor changes in the promoter sequence, such as 1-4 nucleotide insertions/deletions, had no effect on the heading time of plants, whereas the CRISPR/Cas9-mediated 8 bp deletion between -125 and -117 bp of the vrn-A1 promoter shortened the time of head emergence by up to 2-3 days. Such a growth habit was consistently observed in homozygous mutant plants under nonvernalized cultivation using different long day regimes (16, 18, or 22 h), whereas the cold treatment (from two weeks and more) completely leveled the effect of the 8 bp deletion. Importantly, comparison with wild-type plants showed that the implemented alteration has no negative effects on main yield characteristics. Our results demonstrate the potential to manipulate the heading time of wheat through targeted editing of the VRN-A1 gene promoter sequence on an otherwise unchanged genetic background.
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Affiliation(s)
- Dmitry Miroshnichenko
- Kurchatov Genomic Center — All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
- Branch of Institute of Bioorganic Chemistry RAS, Pushchino, Russia
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
| | - Vadim Timerbaev
- Kurchatov Genomic Center — All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
- Branch of Institute of Bioorganic Chemistry RAS, Pushchino, Russia
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
| | - Anna Klementyeva
- Branch of Institute of Bioorganic Chemistry RAS, Pushchino, Russia
| | - Alexander Pushin
- Branch of Institute of Bioorganic Chemistry RAS, Pushchino, Russia
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
| | - Tatiana Sidorova
- Branch of Institute of Bioorganic Chemistry RAS, Pushchino, Russia
| | - Dmitry Litvinov
- Kurchatov Genomic Center — All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
| | - Lubov Nazarova
- Kurchatov Genomic Center — All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
| | - Olga Shulga
- Kurchatov Genomic Center — All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
| | - Mikhail Divashuk
- Kurchatov Genomic Center — All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
| | - Gennady Karlov
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
| | - Elena Salina
- Institute of Cytology and Genetics, SB RAS, Novosibirsk, Russia
| | - Sergey Dolgov
- Branch of Institute of Bioorganic Chemistry RAS, Pushchino, Russia
- All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia
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Kuluev BR, Mikhailova EV, Kuluev AR, Galimova AA, Zaikina EA, Khlestkina EK. Genome Editing in Species of the Tribe Triticeae with the CRISPR/Cas System. Mol Biol 2022. [DOI: 10.1134/s0026893322060127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Wijerathna-Yapa A, Ramtekey V, Ranawaka B, Basnet BR. Applications of In Vitro Tissue Culture Technologies in Breeding and Genetic Improvement of Wheat. PLANTS (BASEL, SWITZERLAND) 2022; 11:2273. [PMID: 36079653 PMCID: PMC9459818 DOI: 10.3390/plants11172273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/13/2022] [Accepted: 08/29/2022] [Indexed: 12/20/2022]
Abstract
Sources of new genetic variability have been limited to existing germplasm in the past. Wheat has been studied extensively for various agronomic traits located throughout the genome. The large size of the chromosomes and the ability of its polyploid genome to tolerate the addition or loss of chromosomes facilitated rapid progress in the early study of wheat genetics using cytogenetic techniques. At the same time, its large genome size has limited the progress in genetic characterization studies focused on diploid species, with a small genome and genetic engineering procedures already developed. Today, the genetic transformation and gene editing procedures offer attractive alternatives to conventional techniques for breeding wheat because they allow one or more of the genes to be introduced or altered into an elite cultivar without affecting its genetic background. Recently, significant advances have been made in regenerating various plant tissues, providing the essential basis for regenerating transgenic plants. In addition, Agrobacterium-mediated, biolistic, and in planta particle bombardment (iPB) gene delivery procedures have been developed for wheat transformation and advanced transgenic wheat development. As a result, several useful genes are now available that have been transferred or would be helpful to be transferred to wheat in addition to the current traditional effort to improve trait values, such as resistance to abiotic and biotic factors, grain quality, and plant architecture. Furthermore, the in planta genome editing method will significantly contribute to the social implementation of genome-edited crops to innovate the breeding pipeline and leverage unique climate adaptations.
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Affiliation(s)
- Akila Wijerathna-Yapa
- ARC Centre of Excellence for Plant Success in Nature and Agriculture, St Lucia, QLD 4072, Australia
- School of Biological Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Vinita Ramtekey
- ICAR-Indian Institute of Seed Science, Kushmaur, Mau, Uttar Pradesh 275103, India
| | - Buddhini Ranawaka
- ARC Centre of Excellence for Plant Success in Nature and Agriculture, St Lucia, QLD 4072, Australia
- Centre for Agriculture and the Bioeconomy, Institute for Future Environments, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Bhoja Raj Basnet
- Global Wheat Program, International Maize and Wheat Improvement Center (CIMMYT), El Batán 56237, Mexico
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Miroshnichenko D, Klementyeva A, Dolgov S. The Effect of Daminozide, Dark/Light Schedule and Copper Sulphate in Tissue Culture of Triticum timopheevii. PLANTS (BASEL, SWITZERLAND) 2021; 10:2620. [PMID: 34961089 PMCID: PMC8706679 DOI: 10.3390/plants10122620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/23/2021] [Accepted: 11/26/2021] [Indexed: 06/14/2023]
Abstract
Triticum timopheevii Zhuk. is a tetraploid wheat that is utilized worldwide as a valuable breeding source for wheat improvement. Gene-based biotechnologies can contribute to this field; however, T. timopheevii exhibits recalcitrance and albinism in tissue cultures, making this species of little use for manipulation through genetic engineering and genome editing. This study tested various approaches to increasing in vitro somatic embryogenesis and plant regeneration, while reducing the portion of albinos in cultures derived from immature embryos (IEs) of T. timopheevii. They included (i) adjusting the balance between 2,4-D and daminozide in callus induction medium; (ii) cultivation using various darkness/illumination schedules; and (iii) inclusion of additional concentrations of copper ions in the tissue culture medium. We achieved a 2.5-fold increase in somatic embryogenesis (up to 80%) when 50 mg L-1 daminozide was included in the callus induction medium together with 3 mg L-1 2,4-D. It was found that the dark cultivation for 20-30 days was superior in terms of achieving maximum culture efficiency; moreover, switching to light in under 2 weeks from culture initiation significantly increased the number of albino plants, suppressed somatic embryogenesis, and decreased the regeneration of green plants. Media containing higher levels of copper ions did not have a positive effect on the regeneration of green plants; contrarily, the elevated concentrations caused albinism in plantlets. The results and relevant conclusions of the present study might be valuable for establishing an improved protocol for the regeneration of green plants in tissue cultures of T. timopheevii.
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Affiliation(s)
- Dmitry Miroshnichenko
- Kurchatov Genomics Center of All-Russia Research Institute of Agricultural Biotechnology, Timiryazevskaya Street 42, 127550 Moscow, Russia
- Branch of Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russion Academy of Science, 142290 Pushchino, Russia; (A.K.); (S.D.)
| | - Anna Klementyeva
- Branch of Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russion Academy of Science, 142290 Pushchino, Russia; (A.K.); (S.D.)
| | - Sergey Dolgov
- Branch of Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russion Academy of Science, 142290 Pushchino, Russia; (A.K.); (S.D.)
- All-Russia Research Institute of Agricultural Biotechnology, Timiryazevskaya Street 42, 127550 Moscow, Russia
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