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Holme IB, Madsen CK, Wendt T, Brinch-Pedersen H. Horizontal Stacking of PAPhy_a Cisgenes in Barley Is a Potent Strategy for Increasing Mature Grain Phytase Activity. FRONTIERS IN PLANT SCIENCE 2020; 11:592139. [PMID: 33193549 PMCID: PMC7644513 DOI: 10.3389/fpls.2020.592139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
Mature grain phytase activity (MGPA) in the Triticea tribe cereals has evolved through gene duplications and neo-functionalization of the purple acid phosphatase phytase gene (PAPhy) in a common ancestor. Increased gene copy number of the PAPhy_a gene expressed during seed development has augmented the MGPA in cereals like rye and wheat. PAPhy_a phytase is highly stable and a potent enzyme in feed. However, barley only contains one HvPAPhy_a gene and the MGPA levels needs to be increased to substitute for the addition of microbial phytases to the feed. A substantial increase in MGPA for cisgenic barley was achieved with one extra homozygous HvPAPhy_a insert when the plants were grown in the greenhouse. In the current study, the stability of increased MGPA was confirmed in open field grown cisgenic barley. Furthermore, the gene dose response of phytase cisgenes from three different cisgenic barley plants were horizontally stacked. Cisgenic barley with 0, 1, 2, 3, 4, and 6 extra HvPAPhy_a inserts demonstrated a perfect positive linear correlation with the level of MGPA. The current study provides new insight into the potential of stacking of cisgenes in crops and suggests cisgene stacking as a versatile strategy for crop improvement.
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102
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Tabei Y, Shimura S, Kwon Y, Itaka S, Fukino N. Analyzing Twitter Conversation on Genome-Edited Foods and Their Labeling in Japan. FRONTIERS IN PLANT SCIENCE 2020; 11:535764. [PMID: 33193475 PMCID: PMC7642521 DOI: 10.3389/fpls.2020.535764] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
In recent years, the research and development of genome editing technology have been progressing rapidly, and the commercial use of genome-edited soybean started in the United States in 2019. A preceding study's results found that there is public concern with regard to the safety of high-tech foods, such as genetically modified foods and genome-edited foods. Twitter, one of the most popular social networks, allows users to post their opinions instantaneously, making it an extremely useful tool to collect what people are actually saying online in a timely manner. Therefore, it was used for collecting data on the users' concerns with and expectations of high-tech foods. This study collected and analyzed Twitter data on genome-edited foods and their labeling from May 25 to October 15 in 2019. Of 14,066 unique user IDs, 94.9% posted 5 or less tweets, whereas 64.8% tweeted only once, indicating that the majority of users who tweeted on this issue are not as intense, as they posted tweets consistently. After a process of refining, there were 28,722 tweets, of which 2,536 tweets (8.8%) were original, 326 (1.1%) were replies, and 25,860 (90%) were retweets. The numbers of tweets increased in response to government announcements and news content in the media. A total of six prominent peaks were detected during the investigation period, proving that Twitter could serve as a tool for monitoring degree of users' interests in real time. The co-occurrence network of original and reply tweets provided different words from various tweets that appeared with a certain frequency. However, the network derived from all tweets seemed to concentrate on words from specific tweets with negative overtones. As a result of sentiment analysis, 54.5% to 62.8% tweets were negative about genome-edited food and the labeling policy of the Consumer Affairs Agency, respectively, indicating a strong demand for mandatory labeling. These findings are expected to contribute to the communication strategy of genome-edited foods toward social implementation by government officers and science communicators.
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Affiliation(s)
- Yutaka Tabei
- Strategic Planning Headquarters, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Sachiko Shimura
- Strategic Planning Headquarters, National Agriculture and Food Research Organization, Tsukuba, Japan
- Research Center for Agricultural Information Technology, National Agriculture and Food Research Organization, Tokyo, Japan
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Yeondae Kwon
- Research Center for Agricultural Information Technology, National Agriculture and Food Research Organization, Tokyo, Japan
| | - Shizu Itaka
- Research Center for Agricultural Information Technology, National Agriculture and Food Research Organization, Tokyo, Japan
- Faculty of Science and Technology, Tokyo University of Science, Noda, Japan
| | - Nobuko Fukino
- Strategic Planning Headquarters, National Agriculture and Food Research Organization, Tsukuba, Japan
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103
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Shu H, Luo Z, Peng Z, Wang J. The application of CRISPR/Cas9 in hairy roots to explore the functions of AhNFR1 and AhNFR5 genes during peanut nodulation. BMC PLANT BIOLOGY 2020; 20:417. [PMID: 32894045 PMCID: PMC7487912 DOI: 10.1186/s12870-020-02614-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 08/19/2020] [Indexed: 05/05/2023]
Abstract
BACKGROUND Peanut is an important legume crop growing worldwide. With the published allotetraploid genomes, further functional studies of the genes in peanut are very critical for crop improvement. CRISPR/Cas9 system is emerging as a robust tool for gene functional study and crop improvement, which haven't been extensively utilized in peanut yet. Peanut plant forms root nodules to fix nitrogen through a symbiotic relationship with rhizobia. In model legumes, the response of plants to rhizobia is initiated by Nod factor receptors (NFRs). However, information about the function of NFRs in peanut is still limited. In this study, we applied the CRISPR/Cas9 tool in peanut hairy root transformation system to explore the function of NFR genes. RESULTS We firstly identified four AhNFR1 genes and two AhNFR5 genes in cultivated peanut (Tifrunner). The gene expression analysis showed that the two AhNFR1 and two AhNFR5 genes had high expression levels in nodulating (Nod+) line E5 compared with non-nodulating (Nod-) line E4 during the process of nodule formation, suggesting their roles in peanut nodulation. To further explore their functions in peanut nodulation, we applied CRISPR technology to create knock-out mutants of AhNFR1 and AhNFR5 genes using hairy root transformation system. The sequencing of these genes in transgenic hairy roots showed that the selected AhNFR1 and AhNFR5 genes were successfully edited by the CRISPR system, demonstrating its efficacy for targeted mutation in allotetraploid peanut. The mutants with editing in the two AhNFR5 genes showed Nod- phenotype, whereas mutants with editing in the two selected AhNFR1 genes could still form nodules after rhizobia inoculation. CONCLUSIONS This study showed that CRISPR-Cas9 could be used in peanut hairy root transformation system for peanut functional genomic studies, specifically on the gene function in roots. By using CRISPR-Cas9 targeting peanut AhNFR genes in hairy root transformation system, we validated the function of AhNFR5 genes in nodule formation in peanut.
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Affiliation(s)
- Hongmei Shu
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014 China
- Agronomy Department, University of Florida, Gainesville, FL 32610 USA
| | - Ziliang Luo
- Agronomy Department, University of Florida, Gainesville, FL 32610 USA
| | - Ze Peng
- Agronomy Department, University of Florida, Gainesville, FL 32610 USA
| | - Jianping Wang
- Agronomy Department, University of Florida, Gainesville, FL 32610 USA
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104
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Zheng HX, Sun X, Zhang XS, Sui N. m 6A Editing: New Tool to Improve Crop Quality? TRENDS IN PLANT SCIENCE 2020; 25:859-867. [PMID: 32376086 DOI: 10.1016/j.tplants.2020.04.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 04/01/2020] [Accepted: 04/03/2020] [Indexed: 06/11/2023]
Abstract
N6-methyladenosine (m6A) is the most common type of eukaryotic mRNA modification. It plays an important role in regulating plant growth and development and stress resistance. m6A modification influences nearly all aspects of RNA metabolism and functionality and has great potential for improving crop quality. However, changing m6A modification levels as a whole may have unpredictable effects, making it impossible to accurately predict the effect of specific m6A modifications on RNA. In this opinion article, the main challenges and possible solutions for exploring m6A modification functions in plant systems are discussed. An m6A editing platform that uses new high-throughput methods to identify m6A modification at single-base resolution, and genome editing for selective editing of specific m6A sites for crop improvement is proposed.
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Affiliation(s)
- Hong-Xiang Zheng
- Shandong Provincial Key Laboratory of Plant Stress, College of life Sciences, Shandong Normal University, Jinan, Shandong 250014, China
| | - Xi Sun
- Shandong Provincial Key Laboratory of Plant Stress, College of life Sciences, Shandong Normal University, Jinan, Shandong 250014, China
| | - Xian-Sheng Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Na Sui
- Shandong Provincial Key Laboratory of Plant Stress, College of life Sciences, Shandong Normal University, Jinan, Shandong 250014, China.
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105
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Barone P, Wu E, Lenderts B, Anand A, Gordon-Kamm W, Svitashev S, Kumar S. Efficient Gene Targeting in Maize Using Inducible CRISPR-Cas9 and Marker-free Donor Template. MOLECULAR PLANT 2020; 13:1219-1227. [PMID: 32574856 DOI: 10.1016/j.molp.2020.06.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/11/2020] [Accepted: 06/18/2020] [Indexed: 05/26/2023]
Abstract
CRISPR-Cas9 is a powerful tool for generating targeted mutations and genomic deletions. However, precise gene insertion or sequence replacement remains a major hurdle before application of CRISPR-Cas9 technology is fully realized in plant breeding. Here, we report high-frequency, selectable marker-free intra-genomic gene targeting (GT) in maize. Heat shock-inducible Cas9 was used for generating targeted double-strand breaks and simultaneous mobilization of the donor template from pre-integrated T-DNA. The construct was designed such that release of the donor template and subsequent DNA repair activated expression of the selectable marker gene within the donor locus. This approach generated up to 4.7% targeted insertion of the donor sequence into the target locus in T0 plants, with up to 86% detected donor template release and 99% mutation rate being observed at the donor loci and the genomic target site, respectively. Unlike previous in planta or intra-genomic homologous recombination reports in which the original chimeric GT plants required extensive progeny screening in the next generation to identify non-chimeric GT individuals, our method provides non-chimeric heritable GT in one generation.
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Affiliation(s)
| | - Emily Wu
- Corteva Agriscience™, Johnston, IA 50131, USA
| | | | - Ajith Anand
- Corteva Agriscience™, Johnston, IA 50131, USA
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106
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Ye S, Chen G, Kohnen MV, Wang W, Cai C, Ding W, Wu C, Gu L, Zheng Y, Ma X, Lin C, Zhu Q. Robust CRISPR/Cas9 mediated genome editing and its application in manipulating plant height in the first generation of hexaploid Ma bamboo (Dendrocalamus latiflorus Munro). PLANT BIOTECHNOLOGY JOURNAL 2020; 18:1501-1503. [PMID: 31858701 PMCID: PMC7292545 DOI: 10.1111/pbi.13320] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/29/2019] [Accepted: 12/10/2019] [Indexed: 05/18/2023]
Affiliation(s)
- Shanwen Ye
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Gang Chen
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Markus V. Kohnen
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Wenjia Wang
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Changyang Cai
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - WenSha Ding
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Chu Wu
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Lianfeng Gu
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Yushan Zheng
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Xiangqing Ma
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
| | - Chentao Lin
- Department of MolecularCell & Developmental BiologyUniversity of CaliforniaLos AngelesCAUSA
| | - Qiang Zhu
- Basic Forestry and Proteomics Center (BFPC)Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of ForestryFujian Agriculture and Forestry UniversityFujianChina
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107
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Ishida Y, Hiei Y, Komari T. Tissue culture protocols for gene transfer and editing in maize ( Zea mays L.). PLANT BIOTECHNOLOGY (TOKYO, JAPAN) 2020; 37:121-128. [PMID: 32821218 PMCID: PMC7434677 DOI: 10.5511/plantbiotechnology.20.0113a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/13/2020] [Indexed: 05/28/2023]
Abstract
Efficient methods for gene transfer to maize were developed in the 1990s, first mediated by particle bombardment and then by Agrobacterium tumefaciens. Both methods can efficiently create high-quality events. Genetically modified varieties were commercialized in 1996 and are now planted in more than 90% of the US corn field. Tissue culture protocols for both methods have been well developed and widely employed. Thus, various factors, including handling before gene delivery, techniques to protect cells during gene delivery, and culture media, have been well optimized for various genotypes. Typical protocols for both methods are herein presented to show major outputs from the studies conducted since the early 1990s. As the bombardment protocols tended to be optimized specifically for limited genotypes, the one for B104, a new public inbred with favorable agronomic characteristics, is shown. The Agrobacterium protocol is suitable for various inbred lines, including B104. These protocols are also useful starting points in the optimization of tissue culture for gene editing. The rate-limiting step in both transformation and gene editing is in tissue culture and plant regeneration from modified cells in elite germplasm. Despite the prolonged efforts, large varietal differences in tissue culture responses remain a serious issue in maize. Recently, protocols using morphogenic regulator genes, such as Bbm and Wus2, have been developed that show a strong potential of efficiently transforming recalcitrant varieties.
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Affiliation(s)
- Yuji Ishida
- Plant Innovation Center, Japan Tobacco, Inc., 700 Higashibara, Iwata, Shizuoka 438-0802, Japan
| | - Yukoh Hiei
- Plant Innovation Center, Japan Tobacco, Inc., 700 Higashibara, Iwata, Shizuoka 438-0802, Japan
| | - Toshihiko Komari
- Plant Innovation Center, Japan Tobacco, Inc., 700 Higashibara, Iwata, Shizuoka 438-0802, Japan
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108
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A review of application of base editing for the treatment of inner ear disorders. JOURNAL OF BIO-X RESEARCH 2020. [DOI: 10.1097/jbr.0000000000000040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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109
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Fraser PD, Aharoni A, Hall RD, Huang S, Giovannoni JJ, Sonnewald U, Fernie AR. Metabolomics should be deployed in the identification and characterization of gene-edited crops. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 102:897-902. [PMID: 31923321 DOI: 10.1111/tpj.14679] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 12/17/2019] [Accepted: 01/07/2020] [Indexed: 05/23/2023]
Abstract
Gene-editing techniques are currently revolutionizing biology, allowing far greater precision than previous mutagenic and transgenic approaches. They are becoming applicable to a wide range of plant species and biological processes. Gene editing can rapidly improve a range of crop traits, including disease resistance, abiotic stress tolerance, yield, nutritional quality and additional consumer traits. Unlike transgenic approaches, however, it is not facile to forensically detect gene-editing events at the molecular level, as no foreign DNA exists in the elite line. These limitations in molecular detection approaches are likely to focus more attention on the products generated from the technology than on the process in itself. Rapid advances in sequencing and genome assembly increasingly facilitate genome sequencing as a means of characterizing new varieties generated by gene-editing techniques. Nevertheless, subtle edits such as single base changes or small deletions may be difficult to distinguish from normal variation within a genotype. Given these emerging scenarios, downstream 'omics' technologies reflective of edited affects, such as metabolomics, need to be used in a more prominent manner to fully assess compositional changes in novel foodstuffs. To achieve this goal, metabolomics or 'non-targeted metabolite analysis' needs to make significant advances to deliver greater representation across the metabolome. With the emergence of new edited crop varieties, we advocate: (i) concerted efforts in the advancement of 'omics' technologies, such as metabolomics, and (ii) an effort to redress the use of the technology in the regulatory assessment for metabolically engineered biotech crops.
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Affiliation(s)
- Paul D Fraser
- School of Biological Sciences, Royal Holloway, University of London, Egham Hill, Egham, Surrey, TW20 0EX, UK
| | - Asaph Aharoni
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Robert D Hall
- Wageningen Research, Wageningen University and Research, Droevendaalsesteeg 1, Wageningen, the Netherlands
- Laboratory of Plant Physiology, Wageningen University and Research, Droevendaalsesteeg 1, Wageningen, the Netherlands
- Netherlands Metabolomics Centre, Einsteinweg 55, Leiden, the Netherlands
| | - Sanwen Huang
- Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100084, China
| | - James J Giovannoni
- USDA-ARS, Robert W. Holley Center and Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY, 14853, USA
| | - Uwe Sonnewald
- Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
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110
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Zhang P, Du H, Wang J, Pu Y, Yang C, Yan R, Yang H, Cheng H, Yu D. Multiplex CRISPR/Cas9-mediated metabolic engineering increases soya bean isoflavone content and resistance to soya bean mosaic virus. PLANT BIOTECHNOLOGY JOURNAL 2020; 18:1384-1395. [PMID: 31769589 PMCID: PMC7206993 DOI: 10.1111/pbi.13302] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 11/18/2019] [Indexed: 05/18/2023]
Abstract
Isoflavonoids, which include a variety of secondary metabolites, are derived from the phenylpropanoid pathway and are distributed predominantly in leguminous plants. These compounds play a critical role in plant-environment interactions and are beneficial to human health. Isoflavone synthase (IFS) is a key enzyme in isoflavonoid synthesis and shares a common substrate with flavanone-3-hydroxylase (F3H) and flavone synthase II (FNS II). In this study, CRISPR/Cas9-mediated multiplex gene-editing technology was employed to simultaneously target GmF3H1, GmF3H2 and GmFNSII-1 in soya bean hairy roots and plants. Various mutation types and frequencies were observed in hairy roots. Higher mutation efficiencies were found in the T0 transgenic plants, with a triple gene mutation efficiency of 44.44%, and these results of targeted mutagenesis were stably inherited in the progeny. Metabolomic analysis of T0 triple-mutants leaves revealed significant improvement in isoflavone content. Compared with the wild type, the T3 generation homozygous triple mutants had approximately twice the leaf isoflavone content, and the soya bean mosaic virus (SMV) coat protein content was significantly reduced by one-third after infection with strain SC7, suggesting that increased isoflavone content enhanced the leaf resistance to SMV. The isoflavone content in the seeds of T2 triple mutants was also significantly increased. This study provides not only materials for the improvement of soya bean isoflavone content and resistance to SMV but also a simple system to generate multiplex mutations in soya bean, which may be beneficial for further breeding and metabolic engineering.
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Affiliation(s)
- Peipei Zhang
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
| | - Hongyang Du
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural ScienceHefeiChina
| | - Jiao Wang
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
| | - Yixiang Pu
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
| | - Changyun Yang
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
| | - Rujuan Yan
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
| | - Hui Yang
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
- School of Life SciencesGuangzhou UniversityGuangzhouChina
| | - Hao Cheng
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
| | - Deyue Yu
- National Center for Soybean ImprovementNational Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina
- School of Life SciencesGuangzhou UniversityGuangzhouChina
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111
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Fusing T5 exonuclease with Cas9 and Cas12a increases the frequency and size of deletion at target sites. SCIENCE CHINA-LIFE SCIENCES 2020; 63:1918-1927. [DOI: 10.1007/s11427-020-1671-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 03/05/2020] [Indexed: 02/06/2023]
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112
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Liu S, Zhang M, Feng F, Tian Z. Toward a "Green Revolution" for Soybean. MOLECULAR PLANT 2020; 13:688-697. [PMID: 32171732 DOI: 10.1016/j.molp.2020.03.002] [Citation(s) in RCA: 117] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 02/03/2020] [Accepted: 03/06/2020] [Indexed: 05/25/2023]
Abstract
Soybean (Glycine max), as an economically important food and oilseedcrop, is a major source of plant proteins and oils. Although considerable progress has been made in increasing the yields of rice, wheat, and maize through the "Green Revolution", little improvements have been made for soybean. With the increasing demand of soybean production and the rapid development of crop breeding technologies, time has come for this important crop to undergo a Green Revolution. Here, we briefly summarize the history of crop breeding and Green Revolution in other crops. We then discuss the possible directions and potential approaches toward achieving a Green Revolution for soybean. We provide our views and perspectives on how to breed new soybean varieties with improved yield.
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Affiliation(s)
- Shulin Liu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Feng Feng
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhixi Tian
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
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113
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Wang D, Li F, Cao S, Zhang K. Genomic and functional genomics analyses of gluten proteins and prospect for simultaneous improvement of end-use and health-related traits in wheat. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2020; 133:1521-1539. [PMID: 32020238 PMCID: PMC7214497 DOI: 10.1007/s00122-020-03557-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/24/2020] [Indexed: 05/09/2023]
Abstract
KEY MESSAGE Recent genomic and functional genomics analyses have substantially improved the understanding on gluten proteins, which are important determinants of wheat grain quality traits. The new insights obtained and the availability of precise, versatile and high-throughput genome editing technologies will accelerate simultaneous improvement of wheat end-use and health-related traits. Being a major staple food crop in the world, wheat provides an indispensable source of dietary energy and nutrients to the human population. As worldwide population grows and living standards rise in both developed and developing countries, the demand for wheat with high quality attributes increases globally. However, efficient breeding of high-quality wheat depends on critically the knowledge on gluten proteins, which mainly include several families of prolamin proteins specifically accumulated in the endospermic tissues of grains. Although gluten proteins have been studied for many decades, efficient manipulation of these proteins for simultaneous enhancement of end-use and health-related traits has been difficult because of high complexities in their expression, function and genetic variation. However, recent genomic and functional genomics analyses have substantially improved the understanding on gluten proteins. Therefore, the main objective of this review is to summarize the genomic and functional genomics information obtained in the last 10 years on gluten protein chromosome loci and genes and the cis- and trans-factors regulating their expression in the grains, as well as the efforts in elucidating the involvement of gluten proteins in several wheat sensitivities affecting genetically susceptible human individuals. The new insights gathered, plus the availability of precise, versatile and high-throughput genome editing technologies, promise to speed up the concurrent improvement of wheat end-use and health-related traits and the development of high-quality cultivars for different consumption needs.
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Affiliation(s)
- Daowen Wang
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, and Center for Crop Genome Engineering, Henan Agricultural University, 15 Longzi Lake College Park, Zhengzhou, 450046, China.
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Science, 1 West Beichen Road, Beijing, 100101, China.
| | - Feng Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Science, 1 West Beichen Road, Beijing, 100101, China
| | - Shuanghe Cao
- Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing, 100081, China
| | - Kunpu Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Science, 1 West Beichen Road, Beijing, 100101, China.
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114
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Liu HJ, Jian L, Xu J, Zhang Q, Zhang M, Jin M, Peng Y, Yan J, Han B, Liu J, Gao F, Liu X, Huang L, Wei W, Ding Y, Yang X, Li Z, Zhang M, Sun J, Bai M, Song W, Chen H, Sun X, Li W, Lu Y, Liu Y, Zhao J, Qian Y, Jackson D, Fernie AR, Yan J. High-Throughput CRISPR/Cas9 Mutagenesis Streamlines Trait Gene Identification in Maize. THE PLANT CELL 2020; 32:1397-1413. [PMID: 32102844 PMCID: PMC7203946 DOI: 10.1105/tpc.19.00934] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/06/2020] [Accepted: 02/21/2020] [Indexed: 05/19/2023]
Abstract
Maize (Zea mays) is one of the most important crops in the world. However, few agronomically important maize genes have been cloned and used for trait improvement, due to its complex genome and genetic architecture. Here, we integrated multiplexed CRISPR/Cas9-based high-throughput targeted mutagenesis with genetic mapping and genomic approaches to successfully target 743 candidate genes corresponding to traits relevant for agronomy and nutrition. After low-cost barcode-based deep sequencing, 412 edited sequences covering 118 genes were precisely identified from individuals showing clear phenotypic changes. The profiles of the associated gene-editing events were similar to those identified in human cell lines and consequently are predictable using an existing algorithm originally designed for human studies. We observed unexpected but frequent homology-directed repair through endogenous templates that was likely caused by spatial contact between distinct chromosomes. Based on the characterization and interpretation of gene function from several examples, we demonstrate that the integration of forward and reverse genetics via a targeted mutagenesis library promises rapid validation of important agronomic genes for crops with complex genomes. Beyond specific findings, this study also guides further optimization of high-throughput CRISPR experiments in plants.
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Affiliation(s)
- Hai-Jun Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Liumei Jian
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Jieting Xu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
- WIMI Biotechnology Co., Ltd., Changzhou 213000, China
| | - Qinghua Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Maolin Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Minliang Jin
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Yong Peng
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Jiali Yan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Baozhu Han
- WIMI Biotechnology Co., Ltd., Changzhou 213000, China
| | - Jie Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Fan Gao
- Xishuangbanna Institute of Agricultural Science, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
| | - Xiangguo Liu
- Jilin Provincial Key Laboratory of Agricultural Biotechnology, Agro-Biotechnology Institute, Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Lei Huang
- WIMI Biotechnology Co., Ltd., Changzhou 213000, China
| | - Wenjie Wei
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Yunxiu Ding
- Xishuangbanna Institute of Agricultural Science, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
| | - Xiaofeng Yang
- WIMI Biotechnology Co., Ltd., Changzhou 213000, China
| | - Zhenxian Li
- Xishuangbanna Institute of Agricultural Science, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
| | - Mingliang Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Jiamin Sun
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Minji Bai
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenhao Song
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Hanmo Chen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Xi'ang Sun
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenqiang Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Yuming Lu
- Biogle Genome Editing Center, Changzhou 213125, China
| | - Ya Liu
- Beijing Key Laboratory of Maize DNA Fingerprinting and Molecular Breeding, Beijing Academy of Agriculture & Forestry Sciences, Beijing 100097, China
| | - Jiuran Zhao
- Beijing Key Laboratory of Maize DNA Fingerprinting and Molecular Breeding, Beijing Academy of Agriculture & Forestry Sciences, Beijing 100097, China
| | - Yangwen Qian
- WIMI Biotechnology Co., Ltd., Changzhou 213000, China
| | - David Jackson
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm 14476, Germany
| | - Jianbing Yan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
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115
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Base Editing: The Ever Expanding Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) Tool Kit for Precise Genome Editing in Plants. Genes (Basel) 2020; 11:genes11040466. [PMID: 32344599 PMCID: PMC7231171 DOI: 10.3390/genes11040466] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/21/2020] [Accepted: 04/21/2020] [Indexed: 12/26/2022] Open
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR associated protein 9 (Cas9), a newly developed genome-editing tool, has revolutionized animal and plant genetics by facilitating modification of target genes. This simple, convenient base-editing technology was developed to improve the precision of genome editing. Base editors generate precise point mutations by permanent base conversion at a specific point, with very low levels of insertions and deletions. Different plant base editors have been established by fusing various nucleobase deaminases with Cas9, Cas13, or Cas12a (Cpf1), proteins. Adenine base editors can efficiently convert adenine (A) to guanine (G), whereas cytosine base editors can convert cytosine (C) to thymine (T) in the target region. RNA base editors can induce a base substitution of A to inosine (I) or C to uracil (U). In this review, we describe the precision of base editing systems and their revolutionary applications in plant science; we also discuss the limitations and future perspectives of this approach.
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116
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Ahmar S, Gill RA, Jung KH, Faheem A, Qasim MU, Mubeen M, Zhou W. Conventional and Molecular Techniques from Simple Breeding to Speed Breeding in Crop Plants: Recent Advances and Future Outlook. Int J Mol Sci 2020; 21:E2590. [PMID: 32276445 PMCID: PMC7177917 DOI: 10.3390/ijms21072590] [Citation(s) in RCA: 132] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 04/03/2020] [Accepted: 04/05/2020] [Indexed: 01/28/2023] Open
Abstract
In most crop breeding programs, the rate of yield increment is insufficient to cope with the increased food demand caused by a rapidly expanding global population. In plant breeding, the development of improved crop varieties is limited by the very long crop duration. Given the many phases of crossing, selection, and testing involved in the production of new plant varieties, it can take one or two decades to create a new cultivar. One possible way of alleviating food scarcity problems and increasing food security is to develop improved plant varieties rapidly. Traditional farming methods practiced since quite some time have decreased the genetic variability of crops. To improve agronomic traits associated with yield, quality, and resistance to biotic and abiotic stresses in crop plants, several conventional and molecular approaches have been used, including genetic selection, mutagenic breeding, somaclonal variations, whole-genome sequence-based approaches, physical maps, and functional genomic tools. However, recent advances in genome editing technology using programmable nucleases, clustered regularly interspaced short palindromic repeats (CRISPR), and CRISPR-associated (Cas) proteins have opened the door to a new plant breeding era. Therefore, to increase the efficiency of crop breeding, plant breeders and researchers around the world are using novel strategies such as speed breeding, genome editing tools, and high-throughput phenotyping. In this review, we summarize recent findings on several aspects of crop breeding to describe the evolution of plant breeding practices, from traditional to modern speed breeding combined with genome editing tools, which aim to produce crop generations with desired traits annually.
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Affiliation(s)
- Sunny Ahmar
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China; (S.A.); (M.U.Q.)
| | - Rafaqat Ali Gill
- Oil Crops Research Institute, Chinese Academy of Agriculture Sciences, Wuhan 430070, China;
| | - Ki-Hong Jung
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin 17104, Korea
| | - Aroosha Faheem
- State Key Laboratory of Agricultural Microbiology and State Key Laboratory of Microbial Biosensor, College of Life Sciences Huazhong Agriculture University, Wuhan 430070, China
| | - Muhammad Uzair Qasim
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China; (S.A.); (M.U.Q.)
| | - Mustansar Mubeen
- State Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Weijun Zhou
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China
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117
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Komori T, Sun Y, Kashihara M, Uekawa N, Kato N, Usami S, Ishikawa N, Hiei Y, Kobayashi K, Kum R, Bortiri E, White K, Oeller P, Takemori N, Bate NJ, Komari T. High-throughput phenotypic screening of random genomic fragments in transgenic rice identified novel drought tolerance genes. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2020; 133:1291-1301. [PMID: 31980835 DOI: 10.1007/s00122-020-03548-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
Novel drought tolerance genes were identified by screening thousands of random genomic fragments from grass species in transgenic rice. Identification of agronomically important genes is a critical step for crop breeding through biotechnology. Multiple approaches have been employed to identify new gene targets, including comprehensive screening platforms for gene discovery such as the over-expression of libraries of cDNA clones. In this study, random genomic fragments from plants were introduced into rice and screened for drought tolerance in a high-throughput manner with the aim of finding novel genetic elements not exclusively limited to coding sequences. To illustrate the power of this approach, genomic libraries were constructed from four grass species, and screening a total of 50,825 transgenic rice lines for drought tolerance resulted in the identification of 12 reproducibly efficacious fragments. Of the twelve, two were from the mitochondrial genome of signal grass and ten were from the nuclear genome of buffalo grass. Subsequent sequencing and analyses revealed that the ten fragments from buffalo grass carried a similar genetic element with no significant homology to any previously characterized gene. The deduced protein sequence was rich in acidic amino acid residues in the C-terminal half, and two of the glutamic acid residues in the C-terminal half were shown to play an important role in drought tolerance. The results demonstrate that an open-ended screening approach using random genomic fragments could discover trait genes distinct from gene discovery based on known pathways or biased toward coding sequence over-expression.
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Affiliation(s)
- Toshiyuki Komori
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan.
| | - Yuejin Sun
- Syngenta Crop Protection LLC, 9 Davis Drive, Research Triangle Park, NC, 27709, USA
| | - Masakazu Kashihara
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Natsuko Uekawa
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Norio Kato
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Satoru Usami
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Noriko Ishikawa
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Yukoh Hiei
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Kei Kobayashi
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Rise Kum
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Esteban Bortiri
- Syngenta Crop Protection LLC, 9 Davis Drive, Research Triangle Park, NC, 27709, USA
| | - Kimberly White
- Syngenta Crop Protection LLC, 9 Davis Drive, Research Triangle Park, NC, 27709, USA
| | - Paul Oeller
- Syngenta Crop Protection LLC, 9 Davis Drive, Research Triangle Park, NC, 27709, USA
| | - Naoki Takemori
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
| | - Nicholas J Bate
- Syngenta Crop Protection LLC, 9 Davis Drive, Research Triangle Park, NC, 27709, USA
- Pairwise Plants, 110 TW Alexander Drive, Research Triangle Park, NC, 27709, USA
| | - Toshihiko Komari
- Plant Innovation Center, Japan Tobacco Inc., 700 Higashibara, Iwata, Shizuoka, 438-0802, Japan
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118
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Marker-free carotenoid-enriched rice generated through targeted gene insertion using CRISPR-Cas9. Nat Commun 2020; 11:1178. [PMID: 32132530 PMCID: PMC7055238 DOI: 10.1038/s41467-020-14981-y] [Citation(s) in RCA: 126] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 02/10/2020] [Indexed: 12/19/2022] Open
Abstract
Targeted insertion of transgenes at pre-determined plant genomic safe harbors provides a desirable alternative to insertions at random sites achieved through conventional methods. Most existing cases of targeted gene insertion in plants have either relied on the presence of a selectable marker gene in the insertion cassette or occurred at low frequency with relatively small DNA fragments (<1.8 kb). Here, we report the use of an optimized CRISPR-Cas9-based method to achieve the targeted insertion of a 5.2 kb carotenoid biosynthesis cassette at two genomic safe harbors in rice. We obtain marker-free rice plants with high carotenoid content in the seeds and no detectable penalty in morphology or yield. Whole-genome sequencing reveals the absence of off-target mutations by Cas9 in the engineered plants. These results demonstrate targeted gene insertion of marker-free DNA in rice using CRISPR-Cas9 genome editing, and offer a promising strategy for genetic improvement of rice and other crops. Existing examples of targeted gene insertion in plants either rely on a selectable marker gene or result in short DNA inserts. Here, the authors use an optimized CRISPR-Cas9 method to insert a 5.2 kb carotenoid biosynthesis cassette into genomic safe harbors in rice, and obtain marker-free lines with high carotenoid content.
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119
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Using energy-efficient synthetic biochemical pathways to bypass photorespiration. Biochem Soc Trans 2020; 47:1805-1813. [PMID: 31754693 DOI: 10.1042/bst20190322] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 10/24/2019] [Accepted: 10/28/2019] [Indexed: 12/30/2022]
Abstract
Current crop yields will not be enough to sustain today's diets for a growing global population. As plant photosynthetic efficiency has not reached its theoretical maximum, optimizing photosynthesis is a promising strategy to enhance plant productivity. The low productivity of C3 plants is caused in part by the substantial energetic investments necessary to maintain a high flux through the photorespiratory pathway. Accordingly, lowering the energetic costs of photorespiration to enhance the productivity of C3 crops has been a goal of synthetic plant biology for decades. The use of synthetic bypasses to photorespiration in different plants showed an improvement of photosynthetic performance and growth under laboratory and field conditions, even though in silico predictions suggest that the tested synthetic pathways should confer a minimal or even negative energetic advantage over the wild type photorespiratory pathway. Current strategies increasingly utilize theoretical modeling and new molecular techniques to develop synthetic biochemical pathways that bypass photorespiration, representing a highly promising approach to enhance future plant productivity.
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120
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Baebler Š, Coll A, Gruden K. Plant Molecular Responses to Potato Virus Y: A Continuum of Outcomes from Sensitivity and Tolerance to Resistance. Viruses 2020; 12:E217. [PMID: 32075268 PMCID: PMC7077201 DOI: 10.3390/v12020217] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/11/2020] [Accepted: 02/13/2020] [Indexed: 12/25/2022] Open
Abstract
Potato virus Y (PVY) is the most economically important virus affecting potato production. PVY manipulates the plant cell machinery in order to successfully complete the infecting cycle. On the other side, the plant activates a sophisticated multilayer immune defense response to combat viral infection. The balance between these mechanisms, depending on the plant genotype and environment, results in a specific outcome that can be resistance, sensitivity, or tolerance. In this review, we summarize and compare the current knowledge on molecular events, leading to different phenotypic outcomes in response to PVY and try to link them with the known molecular mechanisms.
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121
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Liu X, Zhou X, Li K, Wang D, Ding Y, Liu X, Luo J, Fang C. A simple and efficient cloning system for CRISPR/Cas9-mediated genome editing in rice. PeerJ 2020; 8:e8491. [PMID: 32030327 PMCID: PMC6995270 DOI: 10.7717/peerj.8491] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 12/30/2019] [Indexed: 11/20/2022] Open
Abstract
Rapidly growing genetics and bioinformatics studies provide us with an opportunity to obtain a global view of the genetic basis of traits, but also give a challenge to the function validation of candidate genes. CRISPR/Cas9 is an emerging and efficient tool for genome editing. To construct expression clones for the CRISPR/Cas9, most current methods depend on traditional cloning using Gateway reaction or specific type IIS restriction enzymes and DNA ligation, based on multiple steps of PCR. We developed a system for introducing sgRNA expression cassette(s) directly into plant binary vectors in one step. In this system, one sgRNA expression cassette(s) is generated by an optimized multiplex PCR, in which an overlapping PCR took place. Whilst, two sgRNA expression cassettes were amplified in a single round of PCR. Subsequently, an LR or Golden gate reaction was set up with unpurified PCR product and befitting destination vector. We are able to construct expression clones within 36 h, which greatly improves efficiency and saves cost. Furthermore, the efficiency of this system was verified by an agrobacterium-mediated genetic transformation in rice. The system reported here provides a much more efficient and simpler procedure to construct expression clones for CRISPR/Cas9-mediated genome editing.
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Affiliation(s)
- Xiaoli Liu
- College of Tropical Crops, Hainan University, Haikou, Hainan, China
| | - Xiujuan Zhou
- College of Tropical Crops, Hainan University, Haikou, Hainan, China
| | - Kang Li
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Dehong Wang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yuanhao Ding
- College of Tropical Crops, Hainan University, Haikou, Hainan, China
| | - Xianqing Liu
- College of Tropical Crops, Hainan University, Haikou, Hainan, China
| | - Jie Luo
- College of Tropical Crops, Hainan University, Haikou, Hainan, China.,National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Chuanying Fang
- College of Tropical Crops, Hainan University, Haikou, Hainan, China
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122
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Niemiec E, Howard HC. Germline Genome Editing Research: What Are Gamete Donors (Not) Informed About in Consent Forms? CRISPR J 2020; 3:52-63. [PMID: 32091253 PMCID: PMC7047087 DOI: 10.1089/crispr.2019.0043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The potential for using germline genome editing (GGE) in humans has garnered a lot of attention, both for its scientific possibilities as well as for the ethical, legal, and social challenges it ignites. The ethical debate has focused primarily on the suggestions of using GGE to establish a pregnancy (i.e., to offer it in a clinical setting), which is, to date, illegal in many jurisdictions. The use of GGE in research (where a pregnancy would not be established) has received much less attention, despite the fact that it raises serious ethical and social issues as well. Herein, we report on the analysis of informed consent forms for egg and sperm donation used in a widely publicized study where genome editing was used to correct a disease-causing genetic mutation in human embryos. Importantly, embryos were created using eggs and sperm obtained specifically for these experiments. The analysis indicates deficiencies in how the forms addressed various issues, including limited and potentially misleading information about the sensitive nature of the study, the lack of an explicit mention of genomic sequencing, as well as the poor readability of the forms. Furthermore, the arguably high compensation of U.S.$5,000 for egg donors raises questions about undue inducement to participate in research. Moreover, since the procurement of eggs involves serious health risks, it may be questioned whether research requiring such a procedure should be pursued. If such experiments are continued, donors should be informed about all relevant aspects in order to make informed decisions about participating.
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Affiliation(s)
- Emilia Niemiec
- Centre for Research Ethics and Bioethics, Uppsala University, Uppsala, Sweden
| | - Heidi Carmen Howard
- Centre for Research Ethics and Bioethics, Uppsala University, Uppsala, Sweden
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123
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Alyami MZ, Alsaiari SK, Li Y, Qutub SS, Aleisa FA, Sougrat R, Merzaban JS, Khashab NM. Cell-Type-Specific CRISPR/Cas9 Delivery by Biomimetic Metal Organic Frameworks. J Am Chem Soc 2020; 142:1715-1720. [PMID: 31931564 DOI: 10.1021/jacs.9b11638] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Effective and cell-type-specific delivery of CRISPR/Cas9 gene editing elements remains a challenging open problem. Here we report the development of biomimetic cancer cell coated zeolitic imidazolate frameworks (ZIFs) for targeted and cell-specific delivery of this genome editing machinery. Coating ZIF-8 that is encapsulating CRISPR/Cas9 (CC-ZIF) with a cancer cell membrane resulted in the uniformly covered C3-ZIF(cell membrane type). Incubation of C3-ZIFMCF with MCF-7, HeLa, HDFn, and aTC cell lines showed the highest uptake by MCF-7 cells and negligible uptake by the healthy cells (i.e., HDFn and aTC). As to genome editing, a 3-fold repression in the EGFP expression was observed when MCF-7 were transfected with C3-ZIFMCF compared to 1-fold repression in the EGFP expression when MCF-7 were transfected with C3-ZIFHELA. In vivo testing confirmed the selectivity of C3-ZIFMCF to accumulate in MCF-7 tumor cells. This supports the ability of this biomimetic approach to match the needs of cell-specific targeting, which is unquestionably the most critical step in the future translation of genome editing technologies.
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Affiliation(s)
- Mram Z Alyami
- Smart Hybrid Materials (SHMs) Laboratory, Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Shahad K Alsaiari
- Smart Hybrid Materials (SHMs) Laboratory, Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Yanyan Li
- Cell Migration and Signaling Laboratory, Division of Biological and Environmental Science and Engineering , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Somayah S Qutub
- Smart Hybrid Materials (SHMs) Laboratory, Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Fajr A Aleisa
- Cell Migration and Signaling Laboratory, Division of Biological and Environmental Science and Engineering , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Rachid Sougrat
- Advanced Nanofabrication Imaging and Characterization Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Jasmeen S Merzaban
- Cell Migration and Signaling Laboratory, Division of Biological and Environmental Science and Engineering , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Niveen M Khashab
- Smart Hybrid Materials (SHMs) Laboratory, Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
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124
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Raybould A. Problem formulation and phenotypic characterisation for the development of novel crops. Transgenic Res 2020; 28:135-145. [PMID: 31321696 DOI: 10.1007/s11248-019-00147-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Phenotypic characterisation provides important information about novel crops that helps their developers to make technical and commercial decisions. Phenotypic characterisation comprises two activities. Product characterisation checks that the novel crop has the qualities of a viable product-the intended traits have been introduced and work as expected, and no unintended changes have been made that will adversely affect the performance of the final product. Risk assessment evaluates whether the intended and unintended changes are likely to harm human health or the environment. Product characterisation follows the principles of problem formulation, namely that the characteristics required in the final product are defined and criteria to decide whether the novel crop will have these properties are set. The hypothesis that the novel crop meets the criteria are tested during product development. If the hypothesis is corroborated, development continues, and if the hypothesis is falsified, the product is redesigned or its development is halted. Risk assessment should follow the same principles. Criteria that indicate the crop poses unacceptable risk should be set, and the hypothesis that the crop does not possess those properties should be tested. However, risk assessment, particularly when considering unintended changes introduced by new plant breeding methods such as gene editing, often ignores these principles. Instead, phenotypic characterisation seeks to catalogue all unintended changes by profiling methods and then proceeds to work out whether any of the changes are important. This paper argues that profiling is an inefficient and ineffective method of phenotypic characterisation for risk assessment. It discusses reasons why profiling is favoured and corrects some misconceptions about problem formulation.
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Affiliation(s)
- Alan Raybould
- Syngenta Crop Protection AG, Rosentalstrasse 67, 4002, Basel, Switzerland.
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125
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Schmidt C, Schindele P, Puchta H. From gene editing to genome engineering: restructuring plant chromosomes via CRISPR/Cas. ABIOTECH 2020; 1:21-31. [PMID: 36305002 PMCID: PMC9584095 DOI: 10.1007/s42994-019-00002-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 07/03/2019] [Indexed: 01/16/2023]
Abstract
In the last years, tremendous progress has been achieved in the field of gene editing in plants. By the induction of single site-specific double-strand breaks (DSBs), the knockout of genes by non-homologous end joining has become routine in many plant species. Recently, the efficiency of inducing pre-planned mutations by homologous recombination has also been improved considerably. However, very little effort has been undertaken until now to achieve more complex changes in plant genomes by the simultaneous induction of several DSBs. Several reports have been published on the efficient induction of deletions. However, the induction of intrachromosomal inversions and interchromosomal recombination by the use of CRISPR/Cas has only recently been reported. In this review, we want to sum up these results and put them into context with regards to what is known about natural chromosome rearrangements in plants. Moreover, we review the recent progress in CRISPR/Cas-based mammalian chromosomal rearrangements, which might be inspiring for plant biologists. In the long run, the controlled restructuring of plant genomes should enable us to link or break linkage of traits at will, thus defining a new area of plant breeding.
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Affiliation(s)
- Carla Schmidt
- Botanical Institute, Karlsruhe Institute of Technology, POB 6980, 76133 Karlsruhe, Germany
| | - Patrick Schindele
- Botanical Institute, Karlsruhe Institute of Technology, POB 6980, 76133 Karlsruhe, Germany
| | - Holger Puchta
- Botanical Institute, Karlsruhe Institute of Technology, POB 6980, 76133 Karlsruhe, Germany
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126
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Shan S, Soltis PS, Soltis DE, Yang B. Considerations in adapting CRISPR/Cas9 in nongenetic model plant systems. APPLICATIONS IN PLANT SCIENCES 2020; 8:e11314. [PMID: 31993256 PMCID: PMC6976890 DOI: 10.1002/aps3.11314] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 10/26/2019] [Indexed: 05/03/2023]
Abstract
The past six years have seen the rapid growth of studies of CRISPR/Cas9 in plant genome editing, a method that enormously facilitates both basic research and practical applications. Most studies have focused on genetic model species, but plant species that are not genetic models may also be economically important or biologically significant, or both. However, developing the CRISPR/Cas9 system in a nongenetic model is challenging. Here, we summarize CRISPR/Cas9 applications in 45 plant genera across 24 families and provide a reference for practical application of CRISPR in nongenetic model plant systems. Suggestions for selecting plant species and target genes are given for proof-of-principle CRISPR studies, and the processes of vector construction are reviewed. We recommend using transient assays to identify a desired CRISPR/Cas9 system in a nongenetic model. We then review methods of plant transformation and describe approaches, using regenerated transgenic plants, for evaluating CRISPR editing results. Lastly, potential future applications of CRISPR in nongenetic model plant species are discussed. This review provides a road map for developing CRISPR in nongenetic models, an application that holds enormous potential in plant biology.
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Affiliation(s)
- Shengchen Shan
- Plant Molecular and Cellular Biology ProgramUniversity of FloridaGainesvilleFlorida32611‐0180USA
- Florida Museum of Natural HistoryUniversity of FloridaGainesvilleFlorida32611‐7800USA
| | - Pamela S. Soltis
- Plant Molecular and Cellular Biology ProgramUniversity of FloridaGainesvilleFlorida32611‐0180USA
- Florida Museum of Natural HistoryUniversity of FloridaGainesvilleFlorida32611‐7800USA
- Biodiversity InstituteUniversity of FloridaGainesvilleFlorida32611‐5585USA
- Genetics InstituteUniversity of FloridaGainesvilleFlorida32610USA
| | - Douglas E. Soltis
- Plant Molecular and Cellular Biology ProgramUniversity of FloridaGainesvilleFlorida32611‐0180USA
- Florida Museum of Natural HistoryUniversity of FloridaGainesvilleFlorida32611‐7800USA
- Biodiversity InstituteUniversity of FloridaGainesvilleFlorida32611‐5585USA
- Genetics InstituteUniversity of FloridaGainesvilleFlorida32610USA
- Department of BiologyUniversity of FloridaGainesvilleFlorida32611‐8525USA
| | - Bing Yang
- Division of Plant SciencesUniversity of MissouriColumbiaMissouri65211USA
- Donald Danforth Plant Science CenterSt. LouisMissouri63132USA
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127
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Burdon JJ, Barrett LG, yang LN, He DC, Zhan J. Maximizing World Food Production through Disease Control. Bioscience 2019. [DOI: 10.1093/biosci/biz149] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jeremy J Burdon
- CSIRO Agriculture and Food, Canberra, Australia
- Fujian Agriculture and Forestry University, Fuzhou, China
| | | | - Li-Na yang
- Fujian Agricultural and Forestry University Fuzhou, China
| | - Dun-Chun He
- Fujian Agricultural and Forestry University Fuzhou, China
| | - Jiasui Zhan
- Fujian Agriculture and Forestry University, Fuzhou, China
- Swedish University of Agricultural Sciences, Uppsala, Sweden
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128
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Erpen-Dalla Corte L, M. Mahmoud L, S. Moraes T, Mou Z, W. Grosser J, Dutt M. Development of Improved Fruit, Vegetable, and Ornamental Crops Using the CRISPR/Cas9 Genome Editing Technique. PLANTS (BASEL, SWITZERLAND) 2019; 8:E601. [PMID: 31847196 PMCID: PMC6963220 DOI: 10.3390/plants8120601] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 12/06/2019] [Accepted: 12/11/2019] [Indexed: 02/06/2023]
Abstract
Horticultural crops, including fruit, vegetable, and ornamental plants are an important component of the agriculture production systems and play an important role in sustaining human life. With a steady growth in the world's population and the consequent need for more food, sustainable and increased fruit and vegetable crop production is a major challenge to guarantee future food security. Although conventional breeding techniques have significantly contributed to the development of important varieties, new approaches are required to further improve horticultural crop production. Clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) has emerged as a valuable genome-editing tool able to change DNA sequences at precisely chosen loci. The CRISPR/Cas9 system was developed based on the bacterial adaptive immune system and comprises of an endonuclease guided by one or more single-guide RNAs to generate double-strand breaks. These breaks can then be repaired by the natural cellular repair mechanisms, during which genetic mutations are introduced. In a short time, the CRISPR/Cas9 system has become a popular genome-editing technique, with numerous examples of gene mutation and transcriptional regulation control in both model and crop plants. In this review, various aspects of the CRISPR/Cas9 system are explored, including a general presentation of the function of the CRISPR/Cas9 system in bacteria and its practical application as a biotechnological tool for editing plant genomes, particularly in horticultural crops.
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Affiliation(s)
| | - Lamiaa M. Mahmoud
- Pomology Department, Faculty of Agriculture, Mansoura University, 35516 Mansoura, Egypt;
- Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA;
| | - Tatiana S. Moraes
- Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba 13416-000, SP, Brazil;
| | - Zhonglin Mou
- Department of Microbiology and Cell Sciences, University of Florida, Gainesville, FL 32603, USA;
| | - Jude W. Grosser
- Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA;
| | - Manjul Dutt
- Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA;
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129
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Jaiswal S, Gautam RK, Singh RK, Krishnamurthy SL, Ali S, Sakthivel K, Iquebal MA, Rai A, Kumar D. Harmonizing technological advances in phenomics and genomics for enhanced salt tolerance in rice from a practical perspective. RICE (NEW YORK, N.Y.) 2019; 12:89. [PMID: 31802312 PMCID: PMC6892996 DOI: 10.1186/s12284-019-0347-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 11/06/2019] [Indexed: 05/12/2023]
Abstract
Half of the global human population is dependent on rice as a staple food crop and more than 25% increase in rice productivity is required to feed the global population by 2030. With increase in irrigation, global warming and rising sea level, rising salinity has become one of the major challenges to enhance the rice productivity. Since the loss on this account is to the tune of US$12 billion per annum, it necessitates the global attention. In the era of technological advancement, substantial progress has been made on phenomics and genomics data generation but reaping benefit of this in rice salinity variety development in terms of cost, time and precision requires their harmonization. There is hardly any comprehensive holistic review for such combined approach. Present review describes classical salinity phenotyping approaches having morphological, physiological and biochemical components. It also gives a detailed account of invasive and non-invasive approaches of phenomic data generation and utilization. Classical work of rice salinity QLTs mapping in the form of chromosomal atlas has been updated. This review describes how QTLs can be further dissected into QTN by GWAS and transcriptomic approaches. Opportunities and progress made by transgenic, genome editing, metagenomics approaches in combating rice salinity problems are discussed. Major aim of this review is to provide a comprehensive over-view of hitherto progress made in rice salinity tolerance research which is required to understand bridging of phenotype based breeding with molecular breeding. This review is expected to assist rice breeders in their endeavours by fetching greater harmonization of technological advances in phenomics and genomics for better pragmatic approach having practical perspective.
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Affiliation(s)
- Sarika Jaiswal
- Centre for Agricultural Bioinformatics, ICAR-Indian Agricultural Statistical Research Institute, PUSA, New Delhi, 110012, India
| | - R K Gautam
- Division of Field Crop Improvement & Protection, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, 744105, India.
| | - R K Singh
- Division of Plant Breeding Genetics and Biotechnology, International Rice Research Institute, DAPO Box 7777, Los Banos, Metro Manila, Philippines
| | - S L Krishnamurthy
- Division of Crop Improvement, ICAR-Central Soil Salinity Research Institute, Karnal, Haryana, 132001, India
| | - S Ali
- Division of Crop Improvement, ICAR-Central Soil Salinity Research Institute, Karnal, Haryana, 132001, India
| | - K Sakthivel
- Division of Field Crop Improvement & Protection, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, 744105, India
| | - M A Iquebal
- Centre for Agricultural Bioinformatics, ICAR-Indian Agricultural Statistical Research Institute, PUSA, New Delhi, 110012, India
| | - Anil Rai
- Centre for Agricultural Bioinformatics, ICAR-Indian Agricultural Statistical Research Institute, PUSA, New Delhi, 110012, India
| | - Dinesh Kumar
- Centre for Agricultural Bioinformatics, ICAR-Indian Agricultural Statistical Research Institute, PUSA, New Delhi, 110012, India.
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130
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Manghwar H, Lindsey K, Zhang X, Jin S. CRISPR/Cas System: Recent Advances and Future Prospects for Genome Editing. TRENDS IN PLANT SCIENCE 2019; 24:1102-1125. [PMID: 31727474 DOI: 10.1016/j.tplants.2019.09.006] [Citation(s) in RCA: 221] [Impact Index Per Article: 44.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 08/30/2019] [Accepted: 09/12/2019] [Indexed: 05/20/2023]
Abstract
Genome editing (GE) has revolutionized biological research through the new ability to precisely edit the genomes of living organisms. In recent years, various GE tools have been explored for editing simple and complex genomes. The clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 system has widely been used in GE due to its high efficiency, ease of use, and accuracy. It can be used to add desirable and remove undesirable alleles simultaneously in a single event. Here, we discuss various applications of CRISPR/Cas9 in a range of important crops, compare it with other GE tools, and review its mechanism, limitations, and future possibilities. Various newly emerging CRISPR/Cas systems, including base editing (BE), xCas9, and Cas12a (Cpf1), are also considered.
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Affiliation(s)
- Hakim Manghwar
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, P.R. China
| | - Keith Lindsey
- Department of Biosciences, Durham University, Durham DH1 3LE, UK
| | - Xianlong Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, P.R. China.
| | - Shuangxia Jin
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, P.R. China.
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131
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Barman A, Deb B, Chakraborty S. A glance at genome editing with CRISPR–Cas9 technology. Curr Genet 2019; 66:447-462. [DOI: 10.1007/s00294-019-01040-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/18/2019] [Accepted: 10/21/2019] [Indexed: 12/16/2022]
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132
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Gionfriddo M, De Gara L, Loreto F. Directed Evolution of Plant Processes: Towards a Green (r)Evolution? TRENDS IN PLANT SCIENCE 2019; 24:999-1007. [PMID: 31604600 DOI: 10.1016/j.tplants.2019.08.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 08/11/2019] [Accepted: 08/13/2019] [Indexed: 05/13/2023]
Abstract
Directed evolution (DE) is a powerful approach for generating proteins with new chemical and physical properties. It mimics the principles of Darwinian evolution by imposing selective pressure on a large population of molecules harboring random genetic variation in DNA, such that sequences with specific desirable properties are generated and selected. We propose that combining DE and genome-editing (DE-GE) technologies represents a powerful tool to discover and integrate new traits into plants for agronomic and biotechnological gain. DE-GE has the potential to deliver a new green (r)evolution research platform that can provide novel solutions to major trait delivery aspirations for sustainable agriculture, climate-resilient crops, and improved food security and nutritional quality.
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Affiliation(s)
- Matteo Gionfriddo
- Unit of Food Science and Human Nutrition, Campus Bio-Medico, University of Rome, Via Álvaro del Portillo 21, 00128 Rome, Italy; Department of Biology, Agriculture, and Food Sciences, National Research Council of Italy (CNR-DISBA), Piazzale Aldo Moro 7, 00185 Rome, Italy
| | - Laura De Gara
- Unit of Food Science and Human Nutrition, Campus Bio-Medico, University of Rome, Via Álvaro del Portillo 21, 00128 Rome, Italy.
| | - Francesco Loreto
- Department of Biology, Agriculture, and Food Sciences, National Research Council of Italy (CNR-DISBA), Piazzale Aldo Moro 7, 00185 Rome, Italy; Department of Biology, University Federico II, Via Cinthia, 80126 Naples, Italy.
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133
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Yang T, Deng L, Zhao W, Zhang R, Jiang H, Ye Z, Li CB, Li C. Rapid breeding of pink-fruited tomato hybrids using the CRISPR/Cas9 system. J Genet Genomics 2019; 46:505-508. [PMID: 31734133 DOI: 10.1016/j.jgg.2019.10.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/17/2019] [Accepted: 10/21/2019] [Indexed: 11/19/2022]
Affiliation(s)
- Tianxia Yang
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Lei Deng
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Wei Zhao
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ruoxi Zhang
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Hongling Jiang
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Zhibiao Ye
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Chang-Bao Li
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (North China), Ministry of Agriculture, Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, China.
| | - Chuanyou Li
- State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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134
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Sun L, Ke F, Nie Z, Wang P, Xu J. Citrus Genetic Engineering for Disease Resistance: Past, Present and Future. Int J Mol Sci 2019; 20:E5256. [PMID: 31652763 PMCID: PMC6862092 DOI: 10.3390/ijms20215256] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/20/2019] [Accepted: 10/21/2019] [Indexed: 11/16/2022] Open
Abstract
Worldwide, citrus is one of the most important fruit crops and is grown in more than 130 countries, predominantly in tropical and subtropical areas. The healthy progress of the citrus industry has been seriously affected by biotic and abiotic stresses. Several diseases, such as canker and huanglongbing, etc., rigorously affect citrus plant growth, fruit quality, and yield. Genetic engineering technologies, such as genetic transformation and genome editing, represent successful and attractive approaches for developing disease-resistant crops. These genetic engineering technologies have been widely used to develop citrus disease-resistant varieties against canker, huanglongbing, and many other fungal and viral diseases. Recently, clustered regularly interspaced short palindromic repeats (CRISPR)-based systems have made genome editing an indispensable genetic manipulation tool that has been applied to many crops, including citrus. The improved CRISPR systems, such as CRISPR/CRISPR-associated protein (Cas)9 and CRISPR/Cpf1 systems, can provide a promising new corridor for generating citrus varieties that are resistant to different pathogens. The advances in biotechnological tools and the complete genome sequence of several citrus species will undoubtedly improve the breeding for citrus disease resistance with a much greater degree of precision. Here, we attempt to summarize the recent successful progress that has been achieved in the effective application of genetic engineering and genome editing technologies to obtain citrus disease-resistant (bacterial, fungal, and virus) crops. Furthermore, we also discuss the opportunities and challenges of genetic engineering and genome editing technologies for citrus disease resistance.
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Affiliation(s)
- Lifang Sun
- Institute of Citrus Research, Zhejiang Academy of Agricultural Sciences, Taizhou 318026, China.
- National Center for Citrus Variety Improvement, Zhejiang Branch, Taizhou 318026, China.
| | - Fuzhi Ke
- Institute of Citrus Research, Zhejiang Academy of Agricultural Sciences, Taizhou 318026, China.
- National Center for Citrus Variety Improvement, Zhejiang Branch, Taizhou 318026, China.
| | - Zhenpeng Nie
- Institute of Citrus Research, Zhejiang Academy of Agricultural Sciences, Taizhou 318026, China.
- National Center for Citrus Variety Improvement, Zhejiang Branch, Taizhou 318026, China.
| | - Ping Wang
- Institute of Citrus Research, Zhejiang Academy of Agricultural Sciences, Taizhou 318026, China.
- National Center for Citrus Variety Improvement, Zhejiang Branch, Taizhou 318026, China.
| | - Jianguo Xu
- Institute of Citrus Research, Zhejiang Academy of Agricultural Sciences, Taizhou 318026, China.
- National Center for Citrus Variety Improvement, Zhejiang Branch, Taizhou 318026, China.
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135
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Young JK, Gasior SL, Jones S, Wang L, Navarro P, Vickroy B, Barrangou R. The repurposing of type I-E CRISPR-Cascade for gene activation in plants. Commun Biol 2019; 2:383. [PMID: 31646186 PMCID: PMC6802105 DOI: 10.1038/s42003-019-0637-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 09/27/2019] [Indexed: 02/07/2023] Open
Abstract
CRISPR-Cas systems are robust and facile tools for manipulating the genome, epigenome and transcriptome of eukaryotic organisms. Most groups use class 2 effectors, such as Cas9 and Cas12a, however, other CRISPR-Cas systems may provide unique opportunities for genome engineering. Indeed, the multi-subunit composition of class 1 systems offers to expand the number of domains and functionalities that may be recruited to a genomic target. Here we report DNA targeting in Zea mays using a class 1 type I-E CRISPR-Cas system from S. thermophilus. First, we engineer its Cascade complex to modulate gene expression by tethering a plant transcriptional activation domain to 3 different subunits. Next, using an immunofluorescent assay, we confirm Cascade cellular complex formation and observe enhanced gene activation when multiple subunits tagged with the transcriptional activator are combined. Finally, we examine Cascade mediated gene activation at chromosomal DNA targets by reprogramming Zea mays cells to change color.
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Affiliation(s)
- Joshua K. Young
- Department of Molecular Engineering, Corteva Agriscience™, Johnston, IA 50131 USA
| | - Stephen L. Gasior
- Department of Molecular Engineering, Corteva Agriscience™, Johnston, IA 50131 USA
| | - Spencer Jones
- Department of Molecular Engineering, Corteva Agriscience™, Johnston, IA 50131 USA
| | - Lijuan Wang
- Department of Molecular Engineering, Corteva Agriscience™, Johnston, IA 50131 USA
| | - Pedro Navarro
- Department of Molecular Engineering, Corteva Agriscience™, Johnston, IA 50131 USA
| | - Becca Vickroy
- Department of Molecular Engineering, Corteva Agriscience™, Johnston, IA 50131 USA
| | - Rodolphe Barrangou
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC 27695 USA
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136
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Bernabé‐Orts JM, Casas‐Rodrigo I, Minguet EG, Landolfi V, Garcia‐Carpintero V, Gianoglio S, Vázquez‐Vilar M, Granell A, Orzaez D. Assessment of Cas12a-mediated gene editing efficiency in plants. PLANT BIOTECHNOLOGY JOURNAL 2019; 17:1971-1984. [PMID: 30950179 PMCID: PMC6737022 DOI: 10.1111/pbi.13113] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 02/19/2019] [Accepted: 03/20/2019] [Indexed: 05/17/2023]
Abstract
The CRISPR/Cas12a editing system opens new possibilities for plant genome engineering. To obtain a comparative assessment of RNA-guided endonuclease (RGEN) types in plants, we adapted the CRISPR/Cas12a system to the GoldenBraid (GB) modular cloning platform and compared the efficiency of Acidaminococcus (As) and Lachnospiraceae (Lb) Cas12a variants with the previously described GB-assembled Streptococcus pyogenes Cas9 (SpCas9) constructs in eight Nicotiana benthamiana loci using transient expression. All three nucleases showed drastic target-dependent differences in efficiency, with LbCas12 producing higher mutagenesis rates in five of the eight loci assayed, as estimated with the T7E1 endonuclease assay. Attempts to engineer crRNA direct repeat (DR) had little effect improving on-target efficiency for AsCas12a and resulted deleterious in the case of LbCas12a. To complete the assessment of Cas12a activity, we carried out genome editing experiments in three different model plants, namely N. benthamiana, Solanum lycopersicum and Arabidopsis thaliana. For the latter, we also resequenced Cas12a-free segregating T2 lines to assess possible off-target effects. Our results showed that the mutagenesis footprint of Cas12a is enriched in deletions of -10 to -2 nucleotides and included in some instances complex rearrangements in the surroundings of the target sites. We found no evidence of off-target mutations neither in related sequences nor somewhere else in the genome. Collectively, this study shows that LbCas12a is a viable alternative to SpCas9 for plant genome engineering.
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Affiliation(s)
- Joan Miquel Bernabé‐Orts
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Consejo Superior de Investigaciones CientíficasUniversidad Politécnica de ValenciaValenciaSpain
| | - Iván Casas‐Rodrigo
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Consejo Superior de Investigaciones CientíficasUniversidad Politécnica de ValenciaValenciaSpain
- Present address:
Department of Biosystems Science and EngineeringEidgenössische Technische Hochschule (ETH) ZurichBaselSwitzerland
| | - Eugenio G. Minguet
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Consejo Superior de Investigaciones CientíficasUniversidad Politécnica de ValenciaValenciaSpain
| | - Viola Landolfi
- Department of Agricultural, Forest and Food SciencesUniversity of TorinoGrugliascoItaly
| | - Victor Garcia‐Carpintero
- Institute for the Conservation and Breeding of Agricultural Biodiversity (COMAV‐UPV)Universitat Politècnica de ValènciaValenciaSpain
| | - Silvia Gianoglio
- Department of Agricultural, Forest and Food SciencesUniversity of TorinoGrugliascoItaly
| | - Marta Vázquez‐Vilar
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Consejo Superior de Investigaciones CientíficasUniversidad Politécnica de ValenciaValenciaSpain
| | - Antonio Granell
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Consejo Superior de Investigaciones CientíficasUniversidad Politécnica de ValenciaValenciaSpain
| | - Diego Orzaez
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Consejo Superior de Investigaciones CientíficasUniversidad Politécnica de ValenciaValenciaSpain
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137
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Yun JY, Kim ST, Kim SG, Kim JS. A zero-background CRISPR binary vector system for construction of sgRNA libraries in plant functional genomics applications. PLANT BIOTECHNOLOGY REPORTS 2019; 13:543-551. [DOI: 10.1007/s11816-019-00567-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 09/17/2019] [Indexed: 08/30/2023]
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138
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Hajizadeh Dastjerdi A, Newman A, Burgio G. The Expanding Class 2 CRISPR Toolbox: Diversity, Applicability, and Targeting Drawbacks. BioDrugs 2019; 33:503-513. [PMID: 31385197 DOI: 10.1007/s40259-019-00369-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The class 2 clustered regularly interspaced short palindromic repeats (CRISPR)-Cas system, one of the prokaryotic adaptive immune systems, has sparked a lot of attention for its use as a gene editing tool. Currently, type II, V, and VI effector modules of this class have been characterized and extensively tested for nucleic acid editing, imaging, and disease diagnostics. Due to the unique composition of their nuclease catalytic center, the effector modules substantially vary in their function and possible biotechnology applications. In this review, we discuss the structural and functional diversity in class 2 CRISPR effectors, and debate their suitability for nucleic acid targeting and their shortcomings as gene editing tools.
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Affiliation(s)
- Arash Hajizadeh Dastjerdi
- Department of Immunology and Infectious Diseases, The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra, ACT, 2603, Australia
| | - Anthony Newman
- Department of Immunology and Infectious Diseases, The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra, ACT, 2603, Australia
| | - Gaetan Burgio
- Department of Immunology and Infectious Diseases, The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra, ACT, 2603, Australia.
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Han YJ, Kim JI. Application of CRISPR/Cas9-mediated gene editing for the development of herbicide-resistant plants. PLANT BIOTECHNOLOGY REPORTS 2019; 13:447-457. [PMID: 0 DOI: 10.1007/s11816-019-00575-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/26/2019] [Indexed: 05/27/2023]
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Kanesaka Y, Okada M, Ito S, Oyama T. Monitoring single-cell bioluminescence of Arabidopsis leaves to quantitatively evaluate the efficiency of a transiently introduced CRISPR/Cas9 system targeting the circadian clock gene ELF3. PLANT BIOTECHNOLOGY (TOKYO, JAPAN) 2019; 36:187-193. [PMID: 31768121 PMCID: PMC6854346 DOI: 10.5511/plantbiotechnology.19.0531a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 05/31/2019] [Indexed: 05/04/2023]
Abstract
The rapid assessment of gene function is crucial in biological research. The CRISPR/Cas9 system is widely used as a tool for targeted gene editing in many organisms including plants. Previously, we established a transient gene expression system for investigating cellular circadian rhythms in duckweed. In this system, circadian reporters and clock gene effectors-such as overexpressors, RNA interference (RNAi), and CRISPR/Cas9-were introduced into duckweed cells using a particle bombardment method. In the present study, we applied the CRISPR/Cas9 system at a single cell level to Arabidopsis thaliana, a model organism in plant biology. To evaluate the mutation induction efficiency of the system, we monitored single-cell bioluminescence after application of the CRISPR/Cas9 system targeting the ELF3 gene, which is essential for robust circadian rhythmicity. We evaluated the mutation induction efficiency by determining the proportion of cells with impaired circadian rhythms. Three single guide RNAs (sgRNAs) were designed, and the proportion of arrhythmic cells following their use ranged from 32 to 91%. A comparison of the mutation induction efficiencies of diploid and tetraploid Arabidopsis suggested that endoreduplication had a slight effect on efficiency. Taken together, our results demonstrate that the transiently introduced CRISPR/Cas9 system is useful for rapidly assessing the physiological function of target genes in Arabidopsis cells.
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Affiliation(s)
| | - Masaaki Okada
- Department of Botany, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shogo Ito
- Department of Botany, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Tokitaka Oyama
- Department of Botany, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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141
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Wang H, Wu Y, Zhang Y, Yang J, Fan W, Zhang H, Zhao S, Yuan L, Zhang P. CRISPR/Cas9-Based Mutagenesis of Starch Biosynthetic Genes in Sweet Potato (Ipomoea Batatas) for the Improvement of Starch Quality. Int J Mol Sci 2019; 20:E4702. [PMID: 31547486 PMCID: PMC6801948 DOI: 10.3390/ijms20194702] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/12/2019] [Accepted: 09/18/2019] [Indexed: 12/13/2022] Open
Abstract
CRISPR/Cas9-mediated genome editing is a powerful technology that has been used for the genetic modification of a number of crop species. In order to evaluate the efficacy of CRISPR/Cas9 technology in the root crop, sweet potato (Ipomoea batatas), two starch biosynthetic pathway genes, IbGBSSI (encoding granule-bound starch synthase I), and IbSBEII (encoding starch branching enzyme II), were targeted in the starch-type cultivar Xushu22 and carotenoid-rich cultivar Taizhong6. I. batatas was transformed using a binary vector, in which the Cas9 gene is driven by the Arabidopsis AtUBQ promoter and the guide RNA is controlled by the Arabidopsis AtU6 promoter. A total of 72 Xushu22 and 35 Taizhong6 transgenic lines were generated and analyzed for mutations. The mutation efficiency was 62-92% with multi-allelic mutations in both cultivars. Most of the mutations were nucleotide substitutions that lead to amino acid changes and, less frequently, stop codons. In addition, short nucleotide insertions or deletions were also found in both IbGBSSI and IbSBEII. Furthermore, a 2658 bp deletion was found in one IbSBEII transgenic line. The total starch contents were not significantly changed in IbGBSSI- and IbSBEII-knockout transgenic lines compared to the wild-type control. However, in the allopolyploid sweet potato, the IbGBSSI-knockout reduced, while the IbSBEII-knockout increased, the amylose percentage. Our results demonstrate that CRISPR/Cas9 technology is an effective tool for the improvement of starch qualities in sweet potato and breeding of polyploid root crops.
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Affiliation(s)
- Hongxia Wang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai 200032, China.
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY 40546, USA.
| | - Yinliang Wu
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai 200032, China.
- Shanghai Sanshu Biotechnology Co., LTD. Shanghai 201210, China.
| | - Yandi Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai 200032, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Jun Yang
- Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Science, Shanghai Chenshan Botanical Garden, Shanghai 201602, China.
| | - Weijuan Fan
- Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Science, Shanghai Chenshan Botanical Garden, Shanghai 201602, China.
| | - Hui Zhang
- Shanghai Center for Plant Stress Biology, Chinese Academy of Sciences, Shanghai 201602, China.
| | - Shanshan Zhao
- Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Science, Shanghai Chenshan Botanical Garden, Shanghai 201602, China.
| | - Ling Yuan
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY 40546, USA.
| | - Peng Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai 200032, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
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142
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Pixley KV, Falck-Zepeda JB, Giller KE, Glenna LL, Gould F, Mallory-Smith CA, Stelly DM, Stewart CN. Genome Editing, Gene Drives, and Synthetic Biology: Will They Contribute to Disease-Resistant Crops, and Who Will Benefit? ANNUAL REVIEW OF PHYTOPATHOLOGY 2019; 57:165-188. [PMID: 31150590 DOI: 10.1146/annurev-phyto-080417-045954] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Genetically engineered crops have been grown for more than 20 years, resulting in widespread albeit variable benefits for farmers and consumers. We review current, likely, and potential genetic engineering (GE) applications for the development of disease-resistant crop cultivars. Gene editing, gene drives, and synthetic biology offer novel opportunities to control viral, bacterial, and fungal pathogens, parasitic weeds, and insect vectors of plant pathogens. We conclude that there will be no shortage of GE applications totackle disease resistance and other farmer and consumer priorities for agricultural crops. Beyond reviewing scientific prospects for genetically engineered crops, we address the social institutional forces that are commonly overlooked by biological scientists. Intellectual property regimes, technology regulatory frameworks, the balance of funding between public- and private-sector research, and advocacy by concerned civil society groups interact to define who uses which GE technologies, on which crops, and for the benefit of whom. Ensuring equitable access to the benefits of genetically engineered crops requires affirmative policies, targeted investments, and excellent science.
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Affiliation(s)
- Kevin V Pixley
- International Maize and Wheat Improvement Center (CIMMYT), 56237 Texcoco, Mexico;
| | - Jose B Falck-Zepeda
- International Food Policy Research Institute (IFPRI), Washington, DC 20005-3915, USA
| | - Ken E Giller
- Plant Production Systems Group, Wageningen University & Research (WUR), 6700 AK Wageningen, The Netherlands
| | - Leland L Glenna
- Department of Agricultural Economics, Sociology, and Education, Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Fred Gould
- Genetic Engineering and Society Center and Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, North Carolina 27695, USA
| | - Carol A Mallory-Smith
- Department of Crop and Soil Science, Oregon State University, Corvallis, Oregon 97331, USA
| | - David M Stelly
- Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas 77843-2474, USA
| | - C Neal Stewart
- Department of Plant Sciences and Center for Agricultural Synthetic Biology, University of Tennessee, Knoxville, Tennessee 37996, USA
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143
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Zhu M, van Grinsven IL, Kormelink R, Tao X. Paving the Way to Tospovirus Infection: Multilined Interplays with Plant Innate Immunity. ANNUAL REVIEW OF PHYTOPATHOLOGY 2019; 57:41-62. [PMID: 30893008 DOI: 10.1146/annurev-phyto-082718-100309] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Tospoviruses are among the most important plant pathogens and cause serious crop losses worldwide. Tospoviruses have evolved to smartly utilize the host cellular machinery to accomplish their life cycle. Plants mount two layers of defense to combat their invasion. The first one involves the activation of an antiviral RNA interference (RNAi) defense response. However, tospoviruses encode an RNA silencing suppressor that enables them to counteract antiviral RNAi. To further combat viral invasion, plants also employ intracellular innate immune receptors (e.g., Sw-5b and Tsw) to recognize different viral effectors (e.g., NSm and NSs). This leads to the triggering of a much more robust defense against tospoviruses called effector-triggered immunity (ETI). Tospoviruses have further evolved their effectors and can break Sw-5b-/Tsw-mediated resistance. The arms race between tospoviruses and both layers of innate immunity drives the coevolution of host defense and viral genes involved in counter defense. In this review, a state-of-the-art overview is presented on the tospoviral life cycle and the multilined interplays between tospoviruses and the distinct layers of defense.
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Affiliation(s)
- Min Zhu
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China;
| | - Irene Louise van Grinsven
- Laboratory of Virology, Department of Plant Sciences, Wageningen University, 6708PB Wageningen, The Netherlands
| | - Richard Kormelink
- Laboratory of Virology, Department of Plant Sciences, Wageningen University, 6708PB Wageningen, The Netherlands
| | - Xiaorong Tao
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China;
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144
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Liu Y, Gao Y, Gao Y, Zhang Q. Targeted deletion of floral development genes in Arabidopsis with CRISPR/Cas9 using the RNA endoribonuclease Csy4 processing system. HORTICULTURE RESEARCH 2019; 6:99. [PMID: 31666960 PMCID: PMC6804923 DOI: 10.1038/s41438-019-0179-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 06/23/2019] [Accepted: 06/26/2019] [Indexed: 05/04/2023]
Abstract
The formation of flowers in higher plants is controlled by complex gene regulatory networks. The study of floral development in Arabidopsis is promoted and maintained by transposon-tagged mutant lines. In this study, we report a CRISPR/Cas9 genome-editing system based on RNA endoribonuclease Csy4 processing to induce high-efficiency and inheritable targeted deletion of transcription factors involved in floral development in Arabidopsis. Using AP1, SVP, and TFL1 as the target genes, multisite and multiple-gene mutations were achieved with a tandemly arrayed Csy4-sgRNA architecture to express multiplexed sgRNAs from a single transcript driven by the Pol II promoter in transgenic lines. Targeted deletions of chromosomal fragments between the first exon and second exon in either one or three genes were generated by using a single binary vector. Interestingly, the efficiency of site-targeted deletion was comparable to that of indel mutation with the multiplexed sgRNAs. DNA sequencing analysis of RT-PCR products showed that targeted deletions of AP1 and TFL1 could lead to frameshift mutations and introduce premature stop codons to disrupt the open-reading frames of the target genes. In addition, no RT-PCR amplified product was acquired after SVP-targeted deletion. Furthermore, the targeted deletions resulted in abnormal floral development in the mutant lines compared to that of wild-type plants. AP1 and SVP mutations increased plant branching significantly, while TFL1 mutant plants displayed a change from indeterminate to determinate inflorescences. Thus, our results demonstrate that CRISPR/Cas9 with the RNA endoribonuclease Csy4 processing system is an efficient tool to study floral development and improve floral traits rapidly and simply.
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Affiliation(s)
- Yingzhu Liu
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Ornamental Horticulture and Landscape Architecture, Beijing Forestry University, 100083 Beijing, China
| | - Yike Gao
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Ornamental Horticulture and Landscape Architecture, Beijing Forestry University, 100083 Beijing, China
| | - Yaohui Gao
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Ornamental Horticulture and Landscape Architecture, Beijing Forestry University, 100083 Beijing, China
| | - Qixiang Zhang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, College of Ornamental Horticulture and Landscape Architecture, Beijing Forestry University, 100083 Beijing, China
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145
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Shelake RM, Pramanik D, Kim JY. Exploration of Plant-Microbe Interactions for Sustainable Agriculture in CRISPR Era. Microorganisms 2019; 7:E269. [PMID: 31426522 PMCID: PMC6723455 DOI: 10.3390/microorganisms7080269] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/08/2019] [Accepted: 08/14/2019] [Indexed: 12/16/2022] Open
Abstract
Plants and microbes are co-evolved and interact with each other in nature. Plant-associated microbes, often referred to as plant microbiota, are an integral part of plant life. Depending on the health effects on hosts, plant-microbe (PM) interactions are either beneficial or harmful. The role of microbiota in plant growth promotion (PGP) and protection against various stresses is well known. Recently, our knowledge of community composition of plant microbiome and significant driving factors have significantly improved. So, the use of plant microbiome is a reliable approach for a next green revolution and to meet the global food demand in sustainable and eco-friendly agriculture. An application of the multifaceted PM interactions needs the use of novel tools to know critical genetic and molecular aspects. Recently discovered clustered regularly interspaced short palindromic repeats (CRISPR)/Cas-mediated genome editing (GE) tools are of great interest to explore PM interactions. A systematic understanding of the PM interactions will enable the application of GE tools to enhance the capacity of microbes or plants for agronomic trait improvement. This review focuses on applying GE techniques in plants or associated microbiota for discovering the fundamentals of the PM interactions, disease resistance, PGP activity, and future implications in agriculture.
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Affiliation(s)
- Rahul Mahadev Shelake
- Division of Applied Life Science (BK21 Plus Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Korea
| | - Dibyajyoti Pramanik
- Division of Applied Life Science (BK21 Plus Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Korea
| | - Jae-Yean Kim
- Division of Applied Life Science (BK21 Plus Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Korea.
- Division of Life Science (CK1 Program), Gyeongsang National University, Jinju 660-701, Korea.
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146
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147
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Hua K, Zhang J, Botella JR, Ma C, Kong F, Liu B, Zhu JK. Perspectives on the Application of Genome-Editing Technologies in Crop Breeding. MOLECULAR PLANT 2019; 12:1047-1059. [PMID: 31260812 DOI: 10.1016/j.molp.2019.06.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 06/23/2019] [Accepted: 06/24/2019] [Indexed: 05/20/2023]
Abstract
Most conventional and modern crop-improvement methods exploit natural or artificially induced genetic variations and require laborious characterization of the progenies of multiple generations derived from time-consuming genetic crosses. Genome-editing systems, in contrast, provide the means to rapidly modify genomes in a precise and predictable way, making it possible to introduce improvements directly into elite varieties. Here, we describe the range of applications available to agricultural researchers using existing genome-editing tools. In addition to providing examples of genome-editing applications in crop breeding, we discuss the technical and social challenges faced by breeders using genome-editing tools for crop improvement.
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Affiliation(s)
- Kai Hua
- Shanghai Center for Plant Stress Biology, CAS Center of Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jinshan Zhang
- Shanghai Center for Plant Stress Biology, CAS Center of Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jose Ramon Botella
- School of Agriculture and Food Sciences, University of Queensland, Brisbane, QLD 4072, Australia
| | - Changle Ma
- Shandong Provincial Key Lab of Plant Stress, School of Life Sciences, Shandong Normal University, Jinan, China
| | - Fanjiang Kong
- School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Baohui Liu
- School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Jian-Kang Zhu
- Shanghai Center for Plant Stress Biology, CAS Center of Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China; Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907, USA.
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148
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Zhang Y, Malzahn AA, Sretenovic S, Qi Y. The emerging and uncultivated potential of CRISPR technology in plant science. NATURE PLANTS 2019; 5:778-794. [PMID: 31308503 DOI: 10.1038/s41477-019-0461-5] [Citation(s) in RCA: 207] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 05/24/2019] [Indexed: 05/18/2023]
Abstract
The application of clustered regularly interspaced short palindromic repeats (CRISPR) for genetic manipulation has revolutionized life science over the past few years. CRISPR was first discovered as an adaptive immune system in bacteria and archaea, and then engineered to generate targeted DNA breaks in living cells and organisms. During the cellular DNA repair process, various DNA changes can be introduced. The diverse and expanding CRISPR toolbox allows programmable genome editing, epigenome editing and transcriptome regulation in plants. However, challenges in plant genome editing need to be fully appreciated and solutions explored. This Review intends to provide an informative summary of the latest developments and breakthroughs of CRISPR technology, with a focus on achievements and potential utility in plant biology. Ultimately, CRISPR will not only facilitate basic research, but also accelerate plant breeding and germplasm development. The application of CRISPR to improve germplasm is particularly important in the context of global climate change as well as in the face of current agricultural, environmental and ecological challenges.
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Affiliation(s)
- Yingxiao Zhang
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, USA
| | - Aimee A Malzahn
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, USA
| | - Simon Sretenovic
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, USA
| | - Yiping Qi
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, USA.
- Institute for Bioscience and Biotechnology Research, University of Maryland, Rockville, MD, USA.
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149
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Gao Y, Gu H, Leburu M, Li X, Wang Y, Sheng J, Fang H, Gu M, Liang G. The heterotrimeric G protein β subunit RGB1 is required for seedling formation in rice. RICE (NEW YORK, N.Y.) 2019; 12:53. [PMID: 31321558 PMCID: PMC6639528 DOI: 10.1186/s12284-019-0313-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/08/2019] [Indexed: 05/22/2023]
Abstract
BACKGROUND The heterotrimeric G protein β subunit RGB1 plays an important role in plant growth and development. However, the molecular mechanisms underlying the regulation of rice growth by RGB1 remain elusive. RESULTS Here, the rgb1 mutants rgb1-1 (+ 1 bp), rgb1-2 (- 1 bp), and rgb1-3 (- 11 bp) were isolated using the CRISPR/Cas9 system, and they were arrested at 1 day after germination and ultimately exhibited seedling lethality. The dynamic anatomical characteristics of the embryos of the rgb1 seedlings and WT during early postgermination and according to TUNEL assays showed that the suppressed growth of the rgb1 mutants was caused by cell death. In addition to the limited shoot and root development, the development of the embryo shoot-root axis was suppressed in the rgb1 mutants. RGB1 was expressed mainly in the root epidermal and vascular tissues of the embryo. Moreover, transcript profiling analysis revealed that the expression of a large number of auxin-, cytokinin-, and brassinosteroid-inducible genes was upregulated or downregulated in the rgb1 mutant compared to the wild type during seedling development. CONCLUSIONS Overall, the rgb1 mutants provide an ideal material for exploring the molecular mechanism underlying rice seedling formation during early postgermination development by G proteins. SIGNIFICANCE STATEMENT The heterotrimeric G protein β subunit RGB1 acts as a crucial factor in promoting early postgermination seedling development in rice.
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Affiliation(s)
- Yun Gao
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China
| | - Houwen Gu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China
| | - Mamotshewa Leburu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China
| | - Xuhui Li
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China
| | - Yan Wang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China
| | - Jiayan Sheng
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China
| | - Huimin Fang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China
| | - Minghong Gu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China
| | - Guohua Liang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College, Yangzhou University, Yangzhou, 225009, China.
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150
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Ren B, Liu L, Li S, Kuang Y, Wang J, Zhang D, Zhou X, Lin H, Zhou H. Cas9-NG Greatly Expands the Targeting Scope of the Genome-Editing Toolkit by Recognizing NG and Other Atypical PAMs in Rice. MOLECULAR PLANT 2019; 12:1015-1026. [PMID: 30928635 DOI: 10.1016/j.molp.2019.03.010] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 03/22/2019] [Accepted: 03/23/2019] [Indexed: 05/13/2023]
Abstract
CRISPR technologies enabling precise genome manipulation are valuable for gene function studies and molecular crop breeding. However, the requirement of a protospacer adjacent motif (PAM), such as NGG and TTN, for Cas protein recognition restricts the selection of targetable genomic loci in practical applications of CRISPR technologies. Recently Cas9-NG, which recognizes a minimal NG PAM, was reported to expand the targeting space of genome editing in human cells, but it remains unclear whether this Cas9 variant can be used in plants. In this study, we evaluated the nuclease activity of Cas9-NG toward various NGN PAMs by targeting endogenous genes in transgenic rice. We found that Cas9-NG edits all NGG, NGA, NGT, and NGC sites with impaired activity, while the gene-edited plants were dominated by monoallelic mutations. Cas9-NG-engineered base editors were then developed and used to generate OsBZR1 gain-of-function plants that can not be created by other available Cas9-engineered base editors. Moreover, we showed that a Cas9-NG-based transcriptional activator efficiently upregulated the expression of endogenous target genes in rice. In addition, we discovered that Cas9-NG recognizes NAC, NTG, NTT, and NCG apart from NG PAM. Together, these findings demonstrate that Cas9-NG can greatly expand the targeting scope of genome-editing tools, showing great potential for targeted genome editing, base editing, and genome regulation in plants.
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Affiliation(s)
- Bin Ren
- Ministry of Education Key Laboratory of Bio-Resource and Eco-Environment, College of Life Sciences, Sichuan University, Chengdu 610065, China; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Lang Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shaofang Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yongjie Kuang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jingwen Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Dawei Zhang
- Ministry of Education Key Laboratory of Bio-Resource and Eco-Environment, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Xueping Zhou
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Honghui Lin
- Ministry of Education Key Laboratory of Bio-Resource and Eco-Environment, College of Life Sciences, Sichuan University, Chengdu 610065, China.
| | - Huanbin Zhou
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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