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Park JS, Choi Y, Jeong MG, Jeong YI, Han JH, Choi HK. Uncovering transcriptional reprogramming during callus development in soybean: insights and implications. FRONTIERS IN PLANT SCIENCE 2023; 14:1239917. [PMID: 37600197 PMCID: PMC10436568 DOI: 10.3389/fpls.2023.1239917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 07/21/2023] [Indexed: 08/22/2023]
Abstract
Callus, a valuable tool in plant genetic engineering, originates from dedifferentiated cells. While transcriptional reprogramming during callus formation has been extensively studied in Arabidopsis thaliana, our knowledge of this process in other species, such as Glycine max, remains limited. To bridge this gap, our study focused on conducting a time-series transcriptome analysis of soybean callus cultured for various durations (0, 1, 7, 14, 28, and 42 days) on a callus induction medium following wounding with the attempt of identifying genes that play key roles during callus formation. As the result, we detected a total of 27,639 alterations in gene expression during callus formation, which could be categorized into eight distinct clusters. Gene ontology analysis revealed that genes associated with hormones, cell wall modification, and cell cycle underwent transcriptional reprogramming throughout callus formation. Furthermore, by scrutinizing the expression patterns of genes related to hormones, cell cycle, cell wall, and transcription factors, we discovered that auxin, cytokinin, and brassinosteroid signaling pathways activate genes involved in both root and shoot meristem development during callus formation. In summary, our transcriptome analysis provides significant insights into the molecular mechanisms governing callus formation in soybean. The information obtained from this study contributes to a deeper understanding of this intricate process and paves the way for further investigation in the field.
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Affiliation(s)
- Joo-Seok Park
- Department of Applied Bioscience, Dong-A University, Busan, Republic of Korea
| | - Yoram Choi
- Department of Applied Bioscience, Dong-A University, Busan, Republic of Korea
| | - Min-Gyun Jeong
- Department of Applied Bioscience, Dong-A University, Busan, Republic of Korea
| | - Yeong-Il Jeong
- Department of Applied Bioscience, Dong-A University, Busan, Republic of Korea
| | - Ji-Hyun Han
- Department of Applied Bioscience, Dong-A University, Busan, Republic of Korea
| | - Hong-Kyu Choi
- Department of Molecular Genetics, Dong-A University, Busan, Republic of Korea
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2
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Bekalu ZE, Panting M, Bæksted Holme I, Brinch-Pedersen H. Opportunities and Challenges of In Vitro Tissue Culture Systems in the Era of Crop Genome Editing. Int J Mol Sci 2023; 24:11920. [PMID: 37569295 PMCID: PMC10419073 DOI: 10.3390/ijms241511920] [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: 06/21/2023] [Revised: 07/17/2023] [Accepted: 07/21/2023] [Indexed: 08/13/2023] Open
Abstract
Currently, the development of genome editing (GE) tools has provided a wide platform for targeted modification of plant genomes. However, the lack of versatile DNA delivery systems for a large variety of crop species has been the main bottleneck for improving crops with beneficial traits. Currently, the generation of plants with heritable mutations induced by GE tools mostly goes through tissue culture. Unfortunately, current tissue culture systems restrict successful results to only a limited number of plant species and genotypes. In order to release the full potential of the GE tools, procedures need to be species and genotype independent. This review provides an in-depth summary and insights into the various in vitro tissue culture systems used for GE in the economically important crops barley, wheat, rice, sorghum, soybean, maize, potatoes, cassava, and millet and uncovers new opportunities and challenges of already-established tissue culture platforms for GE in the crops.
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3
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Su W, Xu M, Radani Y, Yang L. Technological Development and Application of Plant Genetic Transformation. Int J Mol Sci 2023; 24:10646. [PMID: 37445824 DOI: 10.3390/ijms241310646] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/07/2023] [Accepted: 06/16/2023] [Indexed: 07/15/2023] Open
Abstract
Genetic transformation is an important strategy for enhancing plant biomass or resistance in response to adverse environments and population growth by imparting desirable genetic characteristics. Research on plant genetic transformation technology can promote the functional analysis of plant genes, the utilization of excellent traits, and precise breeding. Various technologies of genetic transformation have been continuously discovered and developed for convenient manipulation and high efficiency, mainly involving the delivery of exogenous genes and regeneration of transformed plants. Here, currently developed genetic transformation technologies were expounded and compared. Agrobacterium-mediated gene delivery methods are commonly used as direct genetic transformation, as well as external force-mediated ways such as particle bombardment, electroporation, silicon carbide whiskers, and pollen tubes as indirect ones. The regeneration of transformed plants usually involves the de novo organogenesis or somatic embryogenesis pathway of the explants. Ectopic expression of morphogenetic transcription factors (Bbm, Wus2, and GRF-GIF) can significantly improve plant regeneration efficiency and enable the transformation of some hard-to-transform plant genotypes. Meanwhile, some limitations in these gene transfer methods were compared including genotype dependence, low transformation efficiency, and plant tissue damage, and recently developed flexible approaches for plant genotype transformation are discussed regarding how gene delivery and regeneration strategies can be optimized to overcome species and genotype dependence. This review summarizes the principles of various techniques for plant genetic transformation and discusses their application scope and limiting factors, which can provide a reference for plant transgenic breeding.
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Affiliation(s)
- Wenbin Su
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Mingyue Xu
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Yasmina Radani
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Liming Yang
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
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Miller S, Rønager A, Holm R, Fontanet-Manzaneque JB, Caño-Delgado AI, Bjarnholt N. New methods for sorghum transformation in temperate climates. AOB PLANTS 2023; 15:plad030. [PMID: 37396498 PMCID: PMC10308921 DOI: 10.1093/aobpla/plad030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 06/02/2023] [Indexed: 07/04/2023]
Abstract
Sorghum (Sorghum bicolor) is an emerging cereal crop in temperate climates due to its high drought tolerance and other valuable traits. Genetic transformation is an important tool for the improvement of cereals. However, sorghum is recalcitrant to genetic transformation which is almost only successful in warmer climates. Here, we test the application of two new techniques for sorghum transformation in temperate climates, namely transient transformation by Agrobacterium tumefaciens-mediated agroinfiltration and stable transformation using gold particle bombardment and leaf whorls as explants. We optimized the transient transformation method, including post-infiltration incubation of plants in the dark and using Agrobacterium grown on plates with a high cell density (OD600 = 2.0). Expression of the green fluorescence protein (GFP)-tagged endogenous sorghum gene SbDHR2 was achieved with low transformation efficiency, and our results point out a potential weakness in using this approach for localization studies. Furthermore, we succeeded in the production of callus and somatic embryos from leaf whorls, although no genetic transformation was accomplished with this method. Both methods show potential, even if they seem to be influenced by climatic conditions and therefore need further optimization to be applied routinely in temperate climates.
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Affiliation(s)
- Sara Miller
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksbergs, Denmark
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
| | - Asta Rønager
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksbergs, Denmark
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
| | - Rose Holm
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksbergs, Denmark
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
| | - Juan B Fontanet-Manzaneque
- Department of Molecular Genetics, Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB (Cerdanyola del Vallès), 08193 Barcelona, Spain
| | - Ana I Caño-Delgado
- Department of Molecular Genetics, Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB (Cerdanyola del Vallès), 08193 Barcelona, Spain
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Baloch FS, Altaf MT, Liaqat W, Bedir M, Nadeem MA, Cömertpay G, Çoban N, Habyarimana E, Barutçular C, Cerit I, Ludidi N, Karaköy T, Aasim M, Chung YS, Nawaz MA, Hatipoğlu R, Kökten K, Sun HJ. Recent advancements in the breeding of sorghum crop: current status and future strategies for marker-assisted breeding. Front Genet 2023; 14:1150616. [PMID: 37252661 PMCID: PMC10213934 DOI: 10.3389/fgene.2023.1150616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 04/17/2023] [Indexed: 05/31/2023] Open
Abstract
Sorghum is emerging as a model crop for functional genetics and genomics of tropical grasses with abundant uses, including food, feed, and fuel, among others. It is currently the fifth most significant primary cereal crop. Crops are subjected to various biotic and abiotic stresses, which negatively impact on agricultural production. Developing high-yielding, disease-resistant, and climate-resilient cultivars can be achieved through marker-assisted breeding. Such selection has considerably reduced the time to market new crop varieties adapted to challenging conditions. In the recent years, extensive knowledge was gained about genetic markers. We are providing an overview of current advances in sorghum breeding initiatives, with a special focus on early breeders who may not be familiar with DNA markers. Advancements in molecular plant breeding, genetics, genomics selection, and genome editing have contributed to a thorough understanding of DNA markers, provided various proofs of the genetic variety accessible in crop plants, and have substantially enhanced plant breeding technologies. Marker-assisted selection has accelerated and precised the plant breeding process, empowering plant breeders all around the world.
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Affiliation(s)
- Faheem Shehzad Baloch
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Türkiye
| | - Muhammad Tanveer Altaf
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Türkiye
| | - Waqas Liaqat
- Department of Field Crops, Faculty of Agriculture, Çukurova University, Adana, Türkiye
| | - Mehmet Bedir
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Türkiye
| | - Muhammad Azhar Nadeem
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Türkiye
| | - Gönül Cömertpay
- Eastern Mediterranean Agricultural Research Institute, Adana, Türkiye
| | - Nergiz Çoban
- Eastern Mediterranean Agricultural Research Institute, Adana, Türkiye
| | - Ephrem Habyarimana
- International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, Telangana, India
| | - Celaleddin Barutçular
- Department of Field Crops, Faculty of Agriculture, Çukurova University, Adana, Türkiye
| | - Ibrahim Cerit
- Eastern Mediterranean Agricultural Research Institute, Adana, Türkiye
| | - Ndomelele Ludidi
- Plant Stress Tolerance Laboratory, Department of Biotechnology, University of the Western Cape, Bellville, South Africa
- DSI-NRF Centre of Excellence in Food Security, University of the Western Cape, Bellville, South Africa
| | - Tolga Karaköy
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Türkiye
| | - Muhammad Aasim
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Türkiye
| | - Yong Suk Chung
- Department of Plant Resources and Environment, Jeju National University, Jeju, Republic of Korea
| | | | - Rüştü Hatipoğlu
- Kırşehir Ahi Evran Universitesi Ziraat Fakultesi Tarla Bitkileri Bolumu, Kırşehir, Türkiye
| | - Kağan Kökten
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Türkiye
| | - Hyeon-Jin Sun
- Subtropical Horticulture Research Institute, Jeju National University, Jeju, Republic of Korea
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6
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Liang Y, Yan X, Xu J, Liu Y, Xie K, Li J, Zhan Q. An efficient transformation method for tannin-containing sorghum. PeerJ 2023; 11:e15066. [PMID: 36935918 PMCID: PMC10022505 DOI: 10.7717/peerj.15066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/23/2023] [Indexed: 03/16/2023] Open
Abstract
Background Tannins are the main bottlenecks restricting the transformation efficiency of plants. Hongyingzi is a special tannin-containing sorghum cultivar used in brewing. Methods In this study, a highly efficient microprojectile transformation system for tannin-containing sorghum was successfully exploited using immature embryos (IEs) of Hongyingzi as explants. Results Hongyingzi presented two types of calli. Type II calli were found to be the most suitable and effective explants for transformation. After optimization of the geneticin (G418) concentration and tissue culture medium, an average transformation frequency of 27% was achieved. Molecular analyzis showed that all transgenic plants were positive and showed transgenes expression. The inheritance analyzis confirmed that the transgenes could be inherited into the next generation. Thus, we successfully established an efficient transformation system for tannin-containing sorghum and demonstrated the possibility of breaking the restriction imposed by tannins in plants.
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Affiliation(s)
- Yuan Liang
- College of Agricultural, Anhui Science and Technology University, Fengyang, Anhui, China
| | - Xuehui Yan
- College of Agricultural, Anhui Science and Technology University, Fengyang, Anhui, China
| | - Jingyi Xu
- College of Agricultural, Anhui Science and Technology University, Fengyang, Anhui, China
| | - Yanlong Liu
- College of Agricultural, Anhui Science and Technology University, Fengyang, Anhui, China
| | - Ke Xie
- Research Center of Biology and Agriculture, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, China
| | - Jieqin Li
- College of Agricultural, Anhui Science and Technology University, Fengyang, Anhui, China
| | - Qiuwen Zhan
- College of Agricultural, Anhui Science and Technology University, Fengyang, Anhui, China
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7
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Chapman MA, He Y, Zhou M. Beyond a reference genome: pangenomes and population genomics of underutilized and orphan crops for future food and nutrition security. THE NEW PHYTOLOGIST 2022; 234:1583-1597. [PMID: 35318683 PMCID: PMC9994440 DOI: 10.1111/nph.18021] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 01/22/2022] [Indexed: 04/14/2023]
Abstract
Underutilized crops are, by definition, under-researched compared to staple crops yet come with traits that may be especially important given climate change and the need to feed a globally increasing population. These crops are often stress-tolerant, and this combined with unique and beneficial nutritional profiles. Whilst progress is being made by generating reference genome sequences, in this Tansley Review, we show how this is only the very first step. We advocate that going 'beyond a reference genome' should be a priority, as it is only at this stage one can identify the specific genes and the adaptive alleles that underpin the valuable traits. We sum up how population genomic and pangenomic approaches have led to the identification of stress- and disease-tolerant alleles in staple crops and compare this to the small number of examples from underutilized crops. We also demonstrate how previously underutilized crops have benefitted from genomic advances and that many breeding targets in underutilized crops are often well studied in staple crops. This cross-crop population-level resequencing could lead to an understanding of the genetic basis of adaptive traits in underutilized crops. This level of investment may be crucial for fully understanding the value of these crops before they are lost.
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Affiliation(s)
- Mark A. Chapman
- Biological SciencesUniversity of SouthamptonLife Sciences Building 85, Highfield CampusSouthamptonSO17 1BJUK
| | - Yuqi He
- Institute of Crop SciencesChinese Academy of Agricultural SciencesRoom 405, National Crop Gene Bank BuildingZhongguancun South Street No. 12Haidian DistrictBeijing100081China
| | - Meiliang Zhou
- Institute of Crop SciencesChinese Academy of Agricultural SciencesRoom 405, National Crop Gene Bank BuildingZhongguancun South Street No. 12Haidian DistrictBeijing100081China
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8
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Silva TN, Thomas JB, Dahlberg J, Rhee SY, Mortimer JC. Progress and challenges in sorghum biotechnology, a multipurpose feedstock for the bioeconomy. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:646-664. [PMID: 34644381 PMCID: PMC8793871 DOI: 10.1093/jxb/erab450] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 10/10/2021] [Indexed: 05/09/2023]
Abstract
Sorghum [Sorghum bicolor (L.) Moench] is the fifth most important cereal crop globally by harvested area and production. Its drought and heat tolerance allow high yields with minimal input. It is a promising biomass crop for the production of biofuels and bioproducts. In addition, as an annual diploid with a relatively small genome compared with other C4 grasses, and excellent germplasm diversity, sorghum is an excellent research species for other C4 crops such as maize. As a result, an increasing number of researchers are looking to test the transferability of findings from other organisms such as Arabidopsis thaliana and Brachypodium distachyon to sorghum, as well as to engineer new biomass sorghum varieties. Here, we provide an overview of sorghum as a multipurpose feedstock crop which can support the growing bioeconomy, and as a monocot research model system. We review what makes sorghum such a successful crop and identify some key traits for future improvement. We assess recent progress in sorghum transformation and highlight how transformation limitations still restrict its widespread adoption. Finally, we summarize available sorghum genetic, genomic, and bioinformatics resources. This review is intended for researchers new to sorghum research, as well as those wishing to include non-food and forage applications in their research.
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Affiliation(s)
- Tallyta N Silva
- Joint BioEnergy Institute, Emeryville, CA, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Jason B Thomas
- Carnegie Institution for Science, Department of Plant Biology, Stanford, CA, USA
| | - Jeff Dahlberg
- Joint BioEnergy Institute, Emeryville, CA, USA
- UC-ANR-KARE, 9240 S. Riverbend Ave, Parlier, CA, USA
| | - Seung Y Rhee
- Carnegie Institution for Science, Department of Plant Biology, Stanford, CA, USA
- Correspondence: or
| | - Jenny C Mortimer
- Joint BioEnergy Institute, Emeryville, CA, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, SA, Australia
- Correspondence: or
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9
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Fontanet-Manzaneque JB, Blasco-Escámez D, Martignago D, Rico-Medina A, Caño-Delgado AI. A Method for Rapid and Reliable Molecular Detection of Drought-Response Genes in Sorghum bicolor (L.) Moench Roots. Methods Mol Biol 2022; 2539:223-233. [PMID: 35895207 DOI: 10.1007/978-1-0716-2537-8_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Drought is a major environmental stress that limits growth and productivity in agricultural ecosystems limiting crop yield worldwide. Breeding crops for enhanced drought tolerance is a priority to preserve food security on the increasing world population. Recent work in Arabidopsis has shown that vascular brassinosteroid receptor BRL3 (Brassinosteroid insensitive like-3) transcriptionally controls the production of osmoprotectant metabolites that confer drought resistance without penalizing growth, offering new and exciting possibilities for biotechnological improvement of drought-resistant crops. In cereals, understanding transcriptional responses to drought is an essential step for the production of gene-edited drought-resistant cereals. In this chapter, we present a method to analyze the transcriptional responses to drought in Sorghum bicolor (L.) Moench, our cereal of choice. Among the genes we tested, we found that drought marker gene SbDHN1 has a 1000-fold increase only after 1 day of drought, bringing possibilities for the development of molecular sensors for testing drought. Overall, this analysis is useful to set up conditions of high-throughput transcriptomic analysis of drought stressed plants before drought phenotype is observed.
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Affiliation(s)
- Juan B Fontanet-Manzaneque
- Department of Molecular Genetics, Centre for Research in Agricultural Genomics CSIC-IRTA-UAB-UB (CRAG), Barcelona, Spain
| | - David Blasco-Escámez
- Department of Molecular Genetics, Centre for Research in Agricultural Genomics CSIC-IRTA-UAB-UB (CRAG), Barcelona, Spain
| | - Damiano Martignago
- Department of Molecular Genetics, Centre for Research in Agricultural Genomics CSIC-IRTA-UAB-UB (CRAG), Barcelona, Spain
- Department of Biosciences, University of Milan, Milan, Italy
| | - Andrés Rico-Medina
- Department of Molecular Genetics, Centre for Research in Agricultural Genomics CSIC-IRTA-UAB-UB (CRAG), Barcelona, Spain
| | - Ana I Caño-Delgado
- Department of Molecular Genetics, Centre for Research in Agricultural Genomics CSIC-IRTA-UAB-UB (CRAG), Barcelona, Spain.
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Wang L, Gao L, Liu G, Meng R, Liu Y, Li J. An efficient sorghum transformation system using embryogenic calli derived from mature seeds. PeerJ 2021; 9:e11849. [PMID: 34430078 PMCID: PMC8349514 DOI: 10.7717/peerj.11849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/02/2021] [Indexed: 11/20/2022] Open
Abstract
Significant progress has been made on sorghum transformation in the last decades; however, the transformation process has been constrained by the availability of immature embryos because most of the researchers have utilized immature embryos as favorable explants. Although immature embryos have been proven to be optimal for tissue culture and transformation, isolation of immature embryos is time-consuming, labor-intensive, and limited by warm weather. In this study, we developed an efficient genetic transformation system using mature seeds as explants. The nptII and gus gene, used as the selective marker and report gene respectively, have been co-transformed by particle bombardment. After optimization of tissue culture, the G418 concentration, and transgenic, the average transformation frequency at 13.33% was achieved routinely. The transgenic events and transgene copy numbers were determined by PCR and RT-PCR, respectively. The geneticin selection and GUS staining on T1 seedlings confirmed that the transgenic plants were heritable. Our results demonstrated that the efficient sorghum transformation system has been established using mature seeds as explants. This transformation system will promote sorghum research on genetic engineering and genome editing without seasonal weather conditions restriction and explant resources restriction.
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Affiliation(s)
- Lihua Wang
- College of Agriculture, Anhui Science and Technology University, Fengyang, China
| | - Li Gao
- College of Agriculture, Anhui Science and Technology University, Fengyang, China
| | - Guoquan Liu
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia
| | - Ruirui Meng
- College of Agriculture, Anhui Science and Technology University, Fengyang, China
| | - Yanlong Liu
- College of Agriculture, Anhui Science and Technology University, Fengyang, China
| | - Jieqin Li
- College of Agriculture, Anhui Science and Technology University, Fengyang, China
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11
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Song Y, Bai X, Dong S, Yang Y, Dong H, Wang N, Zhang H, Li S. Stable and Efficient Agrobacterium-Mediated Genetic Transformation of Larch Using Embryogenic Callus. FRONTIERS IN PLANT SCIENCE 2020; 11:584492. [PMID: 33324434 PMCID: PMC7723890 DOI: 10.3389/fpls.2020.584492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/16/2020] [Indexed: 05/24/2023]
Abstract
Larix olgensis or larch is an economically important coniferous tree species with rapid growth in the early stages, strong adaptability, and a short time to harvest. The genetic improvement of larch has garnered considerable attention in recent years for reclaiming timber forests. However, traditional breeding methods are largely ineffective for achieving rapid genetic improvement of L. olgensis. Studies show that the efficiency of plant regeneration can be improved by optimizing somatic embryogenesis. On this basis, we devised a stable, fast and efficient Agrobacterium-mediated genetic transformation method using suspended embryogenic calluses as explants and β-glucuronidase as the reporter. We evaluated the effects of the Agrobacterium load, co-culture period, and addition of acetosyringone and transformant screening antibiotic on the transformation efficiency. In addition, we tested the pCAMBIA 1300-PtHCA 2-1 promoter-GUS binary expression vector, which contains the GUS gene ORF under the control of Populus trichocarpa high cambial activity PtHCA 2-1 promoter, and observed the tissue-specific expression of the GUS gene in the somatic embryos of transgenic larch. This novel technique can not only accelerate the generation of superior transgenic strains of L. olgensis but also aid in future gene functional studies.
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12
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Particle bombardment technology and its applications in plants. Mol Biol Rep 2020; 47:9831-9847. [PMID: 33222118 DOI: 10.1007/s11033-020-06001-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 11/11/2020] [Indexed: 12/15/2022]
Abstract
Particle bombardment, or biolistics, has emerged as an excellent alternative approach for plant genetic transformation which circumvents the limitations of Agrobacterium-mediated genetic transformation. The method has no biological constraints and can transform a wide range of plant species. Besides, it has been the most efficient way to achieve organelle transformation (for both chloroplasts and mitochondria) so far. Along with the recent advances in genome editing technologies, conventional gene delivery tools are now being repurposed to deliver targeted gene editing reagents into the plants. One of the key advantages is that the particle bombardment allows DNA-free gene editing of the genome. It enables the direct delivery of proteins, RNAs, and RNPs into plants. Owing to the versatility and wide-range applicability of the particle bombardment, it will likely remain one of the major genetic transformation methods in the future. This article provides an overview of the current status of particle bombardment technology and its applications in the field of plant research and biotechnology.
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13
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Flinn B, Dale S, Disharoon A, Kresovich S. Comparative Analysis of In Vitro Responses and Regeneration between Diverse Bioenergy Sorghum Genotypes. PLANTS (BASEL, SWITZERLAND) 2020; 9:E248. [PMID: 32075100 PMCID: PMC7076383 DOI: 10.3390/plants9020248] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 01/24/2020] [Accepted: 02/11/2020] [Indexed: 01/09/2023]
Abstract
Sorghum has been considered a recalcitrant plant in vitro and suffers from a lack of regeneration protocols that function broadly and efficiently across a range of genotypes. This study was initiated to identify differential genotype-in vitro protocol responses across a range of bioenergy sorghum parental lines and the common grain sorghum genotype Tx430 in order to characterize response profiles for use in future genetic studies. Two different in vitro protocols, LG and WU, were used for comparisons. Distinct genotype-protocol responses were observed, and the WU protocol performed significantly better for plantlet regeneration. Most bioenergy genotypes performed as well, if not better than Tx430, with Rio and PI329311 as the top regenerating lines. Genotypes displayed protocol-dependent, differential phenolic exudation responses, as indicated by medium browning. During the callus induction phase, genotypes prone to medium browning exhibited a response on WU medium which was either equal or greater than on LG medium. Genotype- and protocol-dependent albino plantlet regeneration was also noted, with three of the bioenergy genotypes showing albino plantlet regeneration. Grassl, Rio and Pink Kafir were susceptible to albino plantlet regeneration, with the response strongly associated with the WU protocol. These bioenergy parental genotypes, and their differential responses under two in vitro protocols, provide tools to further explore and assess the role of genetic loci, candidate genes, and allelic variants in the regulation of in vitro responsiveness in sorghum.
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Affiliation(s)
- Barry Flinn
- Advanced Plant Technology Program, Clemson University, Clemson, SC 29634, USA;
| | - Savanah Dale
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC 29634, USA; (S.D.); (A.D.)
| | - Andrew Disharoon
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC 29634, USA; (S.D.); (A.D.)
| | - Stephen Kresovich
- Advanced Plant Technology Program, Clemson University, Clemson, SC 29634, USA;
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC 29634, USA; (S.D.); (A.D.)
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14
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Tuleski TR, Kimball J, do Amaral FP, Pereira TP, Tadra-Sfeir MZ, de Oliveira Pedrosa F, Maltempi de Souza E, Balint-Kurti P, Monteiro RA, Stacey G. Herbaspirillum rubrisubalbicans as a Phytopathogenic Model to Study the Immune System of Sorghum bicolor. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2020; 33:235-246. [PMID: 31721651 DOI: 10.1094/mpmi-06-19-0154-r] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Herbaspirillum rubrisubalbicans is the causal agent of red stripe disease (RSD) and mottle stripe disease of sorghum and sugarcane, respectively. In all, 63 genotypes of Sorghum bicolor were inoculated with H. rubrisubalbicans, with 59 showing RSD symptoms. Quantitative trait loci (QTL) analysis in a recombinant inbred line (RIL) population identified several QTL associated with variation in resistance to RSD. RNA sequencing analysis identified a number of genes whose transcript levels were differentially regulated during H. rubrisubalbicans infection. Among those genes that responded to H. rubrisubalbicans inoculation were many involved in plant-pathogen interactions such as leucine-rich repeat receptors, mitogen-activated protein kinase 1, calcium-binding proteins, transcriptional factors (ethylene-responsive element binding factor), and callose synthase. Pretreatment of sorghum leaves with the pathogen-associated molecular pattern (PAMP) molecules flg22 and chitooctaose provided protection against subsequent challenge with the pathogen, suggesting that PAMP-triggered immunity plays an important role in the sorghum immunity response. These data present baseline information for the use of the genetically tractable H. rubrisubalbicans-sorghum pathosystem for the study of innate immunity and disease resistance in this important grain and bioenergy crop. Information gained from the use of this system is likely to be informative for other monocots, including those more intractable for experimental study (e.g., sugarcane).
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Affiliation(s)
- Thalita Regina Tuleski
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, PR 19046, Brazil
| | - Jennifer Kimball
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695-7613, U.S.A
| | - Fernanda P do Amaral
- Divisions of Plant Science and Biochemistry, C.S. Bond Life Science Center, University of Missouri, Columbia, MO 65211, U.S.A
| | - Tomas P Pereira
- Department of Food Science and Technology, Federal University of Santa Catarina, Florianópolis, SC 88034-001, Brazil
| | | | - Fabio de Oliveira Pedrosa
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, PR 19046, Brazil
| | - Emanuel Maltempi de Souza
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, PR 19046, Brazil
| | - Peter Balint-Kurti
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695-7613, U.S.A
- Plant Science Research Unit, United States Department of Agriculture-Agricultural Research Service, Raleigh, NC 27695-7613, U.S.A
| | - Rose Adele Monteiro
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, PR 19046, Brazil
| | - Gary Stacey
- Divisions of Plant Science and Biochemistry, C.S. Bond Life Science Center, University of Missouri, Columbia, MO 65211, U.S.A
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15
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Liu G, Massel K, Tabet B, Godwin ID. Biolistic DNA Delivery and Its Applications in Sorghum bicolor. Methods Mol Biol 2020; 2124:197-215. [PMID: 32277455 DOI: 10.1007/978-1-0716-0356-7_10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Biolistic DNA delivery has been considered a universal tool for genetic manipulation to transfer exotic genes to cells or tissues due to its simplicity, versatility, and high efficiency. It has been a preferred method for investigating plant gene function in most monocot crops. The first transgenic sorghum plants were successfully regenerated through biolistic DNA delivery in 1993, with a relatively low transformation efficiency of 0.3%. Since then, tremendous progress has been made in recent years where the highest transformation efficiency was reported at 46.6%. Overall, the successful biolistic DNA delivery system is credited to three fundamental cornerstones: robust tissue culture system, effective gene expression in sorghum, and optimal parameters of DNA delivery. In this chapter, the history, application, and current development of biolistic DNA delivery in sorghum are reviewed, and the prospect of sorghum genetic engineering is discussed.
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Affiliation(s)
- Guoquan Liu
- Centre for Crop Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia.
| | - Karen Massel
- Centre for Crop Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia
| | - Basam Tabet
- Centre for Crop Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia
| | - Ian D Godwin
- Centre for Crop Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Australia
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16
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Establishment and Characterization of Callus and Cell Suspension Cultures of Selected Sorghum bicolor (L.) Moench Varieties: A Resource for Gene Discovery in Plant Stress Biology. AGRONOMY-BASEL 2019. [DOI: 10.3390/agronomy9050218] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Sorghum, a naturally drought tolerant crop, is genetically diverse and provides a wide gene pool for exploitation in crop breeding. In this study, we experimentally assessed friable callus induction rates of seven sorghum varieties using shoot explant for the generation of cell suspension cultures. The cell suspensions were characterized in terms of cell growth and viability profiles as well as gene expression following 400 mM sorbitol-induced osmotic stress for 72 h. Only ICSB 338, a drought susceptible variety, was readily amenable to friable callus formation. Cell culture growth plots of both ICSB 338 and White sorghum (used as a reference line) depicted typical sigmoidal curves. Interestingly, Evans blue assay showed that ICSB 338 cell cultures are more susceptible to osmotic stress than the White sorghum cells. The osmotic stress treatment also triggered differential expression of eight target genes between the two cell culture lines. Overall, these results suggest that the genetic diversity of sorghum germplasm influences friable callus induction rates and molecular responses to osmotic stress, and could be further exploited in plant stress biology studies. Therefore, we have developed a valuable resource for use in molecular studies of sorghum in response to a range of biotic and abiotic stresses.
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17
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Vanhercke T, Belide S, Taylor MC, El Tahchy A, Okada S, Rolland V, Liu Q, Mitchell M, Shrestha P, Venables I, Ma L, Blundell C, Mathew A, Ziolkowski L, Niesner N, Hussain D, Dong B, Liu G, Godwin ID, Lee J, Rug M, Zhou X, Singh SP, Petrie JR. Up-regulation of lipid biosynthesis increases the oil content in leaves of Sorghum bicolor. PLANT BIOTECHNOLOGY JOURNAL 2019; 17:220-232. [PMID: 29873878 PMCID: PMC6330533 DOI: 10.1111/pbi.12959] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/23/2018] [Accepted: 05/30/2018] [Indexed: 05/07/2023]
Abstract
Synthesis and accumulation of the storage lipid triacylglycerol in vegetative plant tissues has emerged as a promising strategy to meet the world's future need for vegetable oil. Sorghum (Sorghum bicolor) is a particularly attractive target crop given its high biomass, drought resistance and C4 photosynthesis. While oilseed-like triacylglycerol levels have been engineered in the C3 model plant tobacco, progress in C4 monocot crops has been lagging behind. In this study, we report the accumulation of triacylglycerol in sorghum leaf tissues to levels between 3 and 8.4% on a dry weight basis depending on leaf and plant developmental stage. This was achieved by the combined overexpression of genes encoding the Zea mays WRI1 transcription factor, Umbelopsis ramanniana UrDGAT2a acyltransferase and Sesamum indicum Oleosin-L oil body protein. Increased oil content was visible as lipid droplets, primarily in the leaf mesophyll cells. A comparison between a constitutive and mesophyll-specific promoter driving WRI1 expression revealed distinct changes in the overall leaf lipidome as well as transitory starch and soluble sugar levels. Metabolome profiling uncovered changes in the abundance of various amino acids and dicarboxylic acids. The results presented here are a first step forward towards the development of sorghum as a dedicated biomass oil crop and provide a basis for further combinatorial metabolic engineering.
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Affiliation(s)
| | | | | | | | | | | | - Qing Liu
- CSIRO Agriculture and FoodCanberraACTAustralia
| | | | | | | | - Lina Ma
- CSIRO Agriculture and FoodCanberraACTAustralia
| | | | - Anu Mathew
- CSIRO Agriculture and FoodCanberraACTAustralia
| | | | | | | | - Bei Dong
- CSIRO Agriculture and FoodCanberraACTAustralia
| | - Guoquan Liu
- School of Agriculture and Food SciencesUniversity of QueenslandBrisbaneQLDAustralia
| | - Ian D. Godwin
- School of Agriculture and Food SciencesUniversity of QueenslandBrisbaneQLDAustralia
| | - Jiwon Lee
- Centre for Advanced MicroscopyAustralian National UniversityCanberraACTAustralia
| | - Melanie Rug
- Centre for Advanced MicroscopyAustralian National UniversityCanberraACTAustralia
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