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Kirov I. Toward Transgene-Free Transposon-Mediated Biological Mutagenesis for Plant Breeding. Int J Mol Sci 2023; 24:17054. [PMID: 38069377 PMCID: PMC10706983 DOI: 10.3390/ijms242317054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/20/2023] [Accepted: 11/23/2023] [Indexed: 12/18/2023] Open
Abstract
Genetic diversity is a key factor for plant breeding. The birth of novel genic and genomic variants is also crucial for plant adaptation in nature. Therefore, the genomes of almost all living organisms possess natural mutagenic mechanisms. Transposable elements (TEs) are a major mutagenic force driving genetic diversity in wild plants and modern crops. The relatively rare TE transposition activity during the thousand-year crop domestication process has led to the phenotypic diversity of many cultivated species. The utilization of TE mutagenesis by artificial and transient acceleration of their activity in a controlled mode is an attractive foundation for a novel type of mutagenesis called TE-mediated biological mutagenesis. Here, I focus on TEs as mutagenic sources for plant breeding and discuss existing and emerging transgene-free approaches for TE activation in plants. Furthermore, I also review the non-randomness of TE insertions in a plant genome and the molecular and epigenetic factors involved in shaping TE insertion preferences. Additionally, I discuss the molecular mechanisms that prevent TE transpositions in germline plant cells (e.g., meiocytes, pollen, egg and embryo cells, and shoot apical meristem), thereby reducing the chances of TE insertion inheritance. Knowledge of these mechanisms can expand the TE activation toolbox using novel gene targeting approaches. Finally, the challenges and future perspectives of plant populations with induced novel TE insertions (iTE plant collections) are discussed.
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Affiliation(s)
- Ilya Kirov
- All-Russia Research Institute of Agricultural Biotechnology, 127550 Moscow, Russia;
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
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2
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Dutta M, Raturi V, Gahlaut V, Kumar A, Sharma P, Verma V, Gupta VK, Sood S, Zinta G. The interplay of DNA methyltransferases and demethylases with tuberization genes in potato ( Solanum tuberosum L.) genotypes under high temperature. FRONTIERS IN PLANT SCIENCE 2022; 13:933740. [PMID: 36051291 PMCID: PMC9425917 DOI: 10.3389/fpls.2022.933740] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 07/08/2022] [Indexed: 06/15/2023]
Abstract
Potato is a temperate crop consumed globally as a staple food. High temperature negatively impacts the tuberization process, eventually affecting crop yield. DNA methylation plays an important role in various developmental and physiological processes in plants. It is a conserved epigenetic mark determined by the dynamic concurrent action of cytosine-5 DNA methyltransferases (C5-MTases) and demethylases (DeMets). However, C5-MTases and DeMets remain unidentified in potato, and their expression patterns are unknown under high temperatures. Here, we performed genome-wide analysis and identified 10 C5-MTases and 8 DeMets in potatoes. Analysis of their conserved motifs, gene structures, and phylogenetic analysis grouped C5-MTases into four subfamilies (StMET, StCMT3, StDRM, and StDNMT2) and DeMets into three subfamilies (StROS, StDML, and StDME). Promoter analysis showed the presence of multiple cis-regulatory elements involved in plant development, hormone, and stress response. Furthermore, expression dynamics of C5-MTases and DeMets were determined in the different tissues (leaf, flower, and stolon) of heat-sensitive (HS) and heat-tolerant (HT) genotypes under high temperature. qPCR results revealed that high temperature resulted in pronounced upregulation of CMT and DRM genes in the HT genotype. Likewise, demethylases showed strong upregulation in HT genotype as compared to HS genotype. Several positive (StSP6A and StBEL5) and negative (StSP5G, StSUT4, and StRAP1) regulators are involved in the potato tuberization. Expression analysis of these genes revealed that high temperature induces the expression of positive regulators in the leaf and stolon samples of HT genotype, possibly through active DNA demethylation and RNA-directed DNA methylation (RdDM) pathway components. Our findings lay a framework for understanding how epigenetic pathways synergistically or antagonistically regulate the tuberization process under high-temperature stress in potatoes. Uncovering such mechanisms will contribute to potato breeding for developing thermotolerant potato varieties.
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Affiliation(s)
- Madhushree Dutta
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Vidhi Raturi
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Vijay Gahlaut
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
| | - Akhil Kumar
- Agrotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
| | - Paras Sharma
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
| | - Vipasha Verma
- Agrotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
| | | | - Salej Sood
- Division of Crop Improvement, ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
| | - Gaurav Zinta
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
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3
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Gahlaut V, Samtani H, Khurana P. Genome-wide identification and expression profiling of cytosine-5 DNA methyltransferases during drought and heat stress in wheat (Triticum aestivum). Genomics 2020; 112:4796-4807. [PMID: 32890700 DOI: 10.1016/j.ygeno.2020.08.031] [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: 06/29/2020] [Revised: 08/17/2020] [Accepted: 08/25/2020] [Indexed: 01/25/2023]
Abstract
DNA methylation is a potential epigenetic mechanism that regulates genome stability, development, and stress mitigation in plants. It is mediated by cytosine-5 DNA methyltransferases (C5-MTases). We identified 52 wheat C5-MTases; and based on domain structure and phylogenetics, these 52 C5-MTases were classified into four sub-families including MET, CMT, DRM and DNMT2; and were distributed on 18 chromosomes. Cis-acting regulatory elements analysis identified abiotic stress-responsive, phytohormone-responsive, development-related and light-related elements in the promoters of TaC5-MTases. We also examined the transcript abundance of TaC5-MTases in different tissues, developmental stages and under abiotic stresses. Notably, most of the TaC5-MTases (TaCMT2, TaCMT3b, TaCMT3c, TaMET1, TaDRM10, TaDNMT2) showed differential regulation of their transcript abundance during drought and heat stress. Overall, the above results provide significant insights into the expression and the probable functions of TaC5-MTases and will also expedite future research programs to explore the mechanisms of epigenetic regulation in wheat.
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Affiliation(s)
- Vijay Gahlaut
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi 110021, India.
| | - Harsha Samtani
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi 110021, India
| | - Paramjit Khurana
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi 110021, India
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4
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You WJ, Feng YR, Shen YH, Chen YR, Chen TY, Fu SF. Silencing of NbCMT3s has Pleiotropic Effects on Development by Interfering with Autophagy-Related Genes in Nicotiana benthamiana. PLANT & CELL PHYSIOLOGY 2019; 60:1120-1135. [PMID: 30785195 DOI: 10.1093/pcp/pcz034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 02/14/2019] [Indexed: 05/25/2023]
Abstract
DNA methylation is a chromatin mark that has a crucial role in regulating gene expression. The chromomethylase (CMT) protein family is a plant-specific DNA methyltransferase that mediates growth and development. However, the roles of CMT3 in autophagy remain to be elucidated. Here, we identified the potential targets of CMT3 in Nicotiana benthamiana (NbCMT3) during developmental programs. Virus-induced gene silencing of NbCMT3/3-2 in N. benthamiana had pleiotropic effects on plant morphology, which indicates its indispensible role in development. Genome-wide transcriptome analysis of NbCMT3/3-2-silenced plants revealed interference with genes related to autophagy and ubiquitination. The expression of NbBeclin 1 and NbHRD1B was higher in NbCMT3/3-2-silenced than control plants. The formation of autophagosomes and starch degradation was disrupted in NbCMT3/3-2-silenced plants, which implies a perturbed autophagic processes. We further generated transgenic N. benthamiana plants carrying a chimeric promoter-reporter construct linking the NbBeclin 1 promoter region and β-glucuronidase (GUS) reporter (pNbBeclin::GUS). NbBeclin 1 promoter activity was significantly enhanced in NbCMT3/3-2-silenced plants. Thus, NbCMT3/3-2 silencing had pleiotropic effects on development by interfering with NbBeclin 1 expression and autophagy-related processes.
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Affiliation(s)
- Wen-Jing You
- Department of Biology, National Changhua University of Education, No.1, Jin-De Road, Changhua, Taiwan
| | - Yun-Ru Feng
- Department of Biology, National Changhua University of Education, No.1, Jin-De Road, Changhua, Taiwan
| | - Ya-Han Shen
- Department of Biology, National Changhua University of Education, No.1, Jin-De Road, Changhua, Taiwan
| | - Yi-Ru Chen
- Department of Biology, National Changhua University of Education, No.1, Jin-De Road, Changhua, Taiwan
| | - Tzy-Yi Chen
- Department of Biology, National Changhua University of Education, No.1, Jin-De Road, Changhua, Taiwan
| | - Shih-Feng Fu
- Department of Biology, National Changhua University of Education, No.1, Jin-De Road, Changhua, Taiwan
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Tu YC, Tsai WS, Wei JY, Chang KY, Tien CC, Hsiao HY, Fu SF. The C2 protein of tomato leaf curl Taiwan virus is a pathogenicity determinant that interferes with expression of host genes encoding chromomethylases. PHYSIOLOGIA PLANTARUM 2017; 161:515-531. [PMID: 28786123 DOI: 10.1111/ppl.12615] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 07/22/2017] [Accepted: 07/28/2017] [Indexed: 06/07/2023]
Abstract
Tomato (Solanum lycopersicum) is one of the most important crops worldwide and is severely affected by geminiviruses. Tomato leaf curl Taiwan virus (ToLCTWV), belonging to the geminiviruses, was isolated in Taiwan and causes tremendous crop loss. The geminivirus-encoded C2 proteins are crucial for a successful interaction between the virus and host plants. However, the exact functions of the viral C2 protein of ToLCTWV have not been investigated. We analyzed the molecular function(s) of the C2 protein by transient or stable expression in tomato cv. Micro-Tom and Nicotiana benthamiana. Severe stunting of tomato and N. benthamiana plants infected with ToLCTWV was observed. Expression of ToLCTWV C2-green fluorescent protein (GFP) fusion protein was predominately located in the nucleus and contributed to activation of a coat protein promoter. Notably, the C2-GFP fluorescence was distributed in nuclear aggregates. Tomato and N. benthamiana plants inoculated with potato virus X (PVX)-C2 displayed chlorotic lesions and stunted growth. PVX-C2 elicited hypersensitive responses accompanied by production of reactive oxygen species in N. benthamiana plants, which suggests that the viral C2 was a potential recognition target to induce host-defense responses. In tomato and N. benthamiana, ToLCTWV C2 was found to interfere with expression of genes encoding chromomethylases. N. benthamiana plants with suppressed NbCMT3-2 expression were more susceptible to ToLCTWV infection. Transgenic N. benthamiana plants expressing the C2 protein showed decreased expression of the NbCMT3-2 gene and pNbCMT3-2::GUS (β-glucuronidase) promoter activity. C2 protein is an important pathogenicity determinant of ToLCTWV and interferes with host components involved in DNA methylation.
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Affiliation(s)
- Yu-Ching Tu
- Department of Biology, National Changhua University of Education, Changhua, Taiwan
| | - Wen-Shi Tsai
- Department of Plant Medicine, National Chiayi University, Chiayi, Taiwan
| | - Jyuan-Yu Wei
- Department of Biology, National Changhua University of Education, Changhua, Taiwan
| | - Kai-Ya Chang
- Department of Biology, National Changhua University of Education, Changhua, Taiwan
| | - Chang-Ching Tien
- Department of Biology, National Changhua University of Education, Changhua, Taiwan
| | - Hui-Yu Hsiao
- Department of Biology, National Changhua University of Education, Changhua, Taiwan
| | - Shih-Feng Fu
- Department of Biology, National Changhua University of Education, Changhua, Taiwan
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6
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Bewick AJ, Niederhuth CE, Ji L, Rohr NA, Griffin PT, Leebens-Mack J, Schmitz RJ. The evolution of CHROMOMETHYLASES and gene body DNA methylation in plants. Genome Biol 2017; 18:65. [PMID: 28457232 PMCID: PMC5410703 DOI: 10.1186/s13059-017-1195-1] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 03/17/2017] [Indexed: 12/11/2022] Open
Abstract
Background The evolution of gene body methylation (gbM), its origins, and its functional consequences are poorly understood. By pairing the largest collection of transcriptomes (>1000) and methylomes (77) across Viridiplantae, we provide novel insights into the evolution of gbM and its relationship to CHROMOMETHYLASE (CMT) proteins. Results CMTs are evolutionary conserved DNA methyltransferases in Viridiplantae. Duplication events gave rise to what are now referred to as CMT1, 2 and 3. Independent losses of CMT1, 2, and 3 in eudicots, CMT2 and ZMET in monocots and monocots/commelinids, variation in copy number, and non-neutral evolution suggests overlapping or fluid functional evolution of this gene family. DNA methylation within genes is widespread and is found in all major taxonomic groups of Viridiplantae investigated. Genes enriched with methylated CGs (mCG) were also identified in species sister to angiosperms. The proportion of genes and DNA methylation patterns associated with gbM are restricted to angiosperms with a functional CMT3 or ortholog. However, mCG-enriched genes in the gymnosperm Pinus taeda shared some similarities with gbM genes in Amborella trichopoda. Additionally, gymnosperms and ferns share a CMT homolog closely related to CMT2 and 3. Hence, the dependency of gbM on a CMT most likely extends to all angiosperms and possibly gymnosperms and ferns. Conclusions The resulting gene family phylogeny of CMT transcripts from the most diverse sampling of plants to date redefines our understanding of CMT evolution and its evolutionary consequences on DNA methylation. Future, functional tests of homologous and paralogous CMTs will uncover novel roles and consequences to the epigenome. Electronic supplementary material The online version of this article (doi:10.1186/s13059-017-1195-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Adam J Bewick
- Department of Genetics, University of Georgia, Athens, GA, 30602, USA
| | - Chad E Niederhuth
- Department of Genetics, University of Georgia, Athens, GA, 30602, USA
| | - Lexiang Ji
- Institute of Bioinformatics, University of Georgia, Athens, GA, 30602, USA
| | - Nicholas A Rohr
- Department of Genetics, University of Georgia, Athens, GA, 30602, USA
| | - Patrick T Griffin
- Department of Genetics, University of Georgia, Athens, GA, 30602, USA
| | - Jim Leebens-Mack
- Department of Plant Biology, University of Georgia, Athens, GA, 30602, USA
| | - Robert J Schmitz
- Department of Genetics, University of Georgia, Athens, GA, 30602, USA.
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Fu SF, Sun PF, Lu HY, Wei JY, Xiao HS, Fang WT, Cheng BY, Chou JY. Plant growth-promoting traits of yeasts isolated from the phyllosphere and rhizosphere of Drosera spatulata Lab. Fungal Biol 2016; 120:433-48. [PMID: 26895872 DOI: 10.1016/j.funbio.2015.12.006] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 12/11/2015] [Accepted: 12/23/2015] [Indexed: 01/29/2023]
Abstract
Microorganisms can promote plant growth through direct and indirect mechanisms. Compared with the use of bacteria and mycorrhizal fungi, the use of yeasts as plant growth-promoting (PGP) agents has not been extensively investigated. In this study, yeast isolates from the phyllosphere and rhizosphere of the medicinally important plant Drosera spatulata Lab. were assessed for their PGP traits. All isolates were tested for indole-3-acetic acid-, ammonia-, and polyamine-producing abilities, calcium phosphate and zinc oxide solubilizing ability, and catalase activity. Furthermore, the activities of siderophore, 1-aminocyclopropane-1-carboxylate deaminase, and fungal cell wall-degrading enzymes were assessed. The antagonistic action of yeasts against pathogenic Glomerella cingulata was evaluated. The cocultivation of Nicotiana benthamiana with yeast isolates enhanced plant growth, indicating a potential yeast-plant interaction. Our study results highlight the potential use of yeasts as plant biofertilizers under controlled and field conditions.
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Affiliation(s)
- Shih-Feng Fu
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan
| | - Pei-Feng Sun
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan
| | - Hsueh-Yu Lu
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan
| | - Jyuan-Yu Wei
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan
| | - Hong-Su Xiao
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan
| | - Wei-Ta Fang
- Graduate Institute of Environmental Education, National Taiwan Normal University, Taipei 116, Taiwan
| | - Bai-You Cheng
- Graduate Institute of Environmental Resources Management, TransWorld University, Yunlin County 640, Taiwan
| | - Jui-Yu Chou
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan.
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Sun YW, Tee CS, Ma YH, Wang G, Yao XM, Ye J. Attenuation of Histone Methyltransferase KRYPTONITE-mediated transcriptional gene silencing by Geminivirus. Sci Rep 2015; 5:16476. [PMID: 26602265 PMCID: PMC4658475 DOI: 10.1038/srep16476] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 10/06/2015] [Indexed: 01/07/2023] Open
Abstract
Although histone H3K9 methylation has been intensively studied in animals and a model plant Arabidopsis thaliana, little is known about the evolution of the histone methyltransferase and its roles in plant biotic stress response. Here we identified a Nicotiana benthamiana homolog of H3K9 histone methyltransferase KRYPTONITE (NbKYP) and demonstrated its fundamental roles on methylation of plant and virus, beside of leading to the suppression of endogenous gene expression and virus replication. NbKYP and another gene encoding DNA methyltransferase CHROMOMETHYLTRANSFERASE 3 (NbCMT3-1) were further identified as the key components of maintenance of transcriptional gene silencing, a DNA methylation involved anti-virus machinery. All three types of DNA methylations (asymmetric CHH and symmetric CHG/CG) were severely affected in NbKYP-silenced plants, but only severe reduction of CHG methylation found in NbCMT3-1-silenced plants. Attesting to the importance of plant histone H3K9 methylation immunity to virus, the virulence of geminiviruses requires virus-encoded trans-activator AC2 which inhibits the expression of KYP via activation of an EAR-motif-containing transcription repressor RAV2 (RELATED TO ABI3 and VP1). The reduction of KYP was correlated with virulence of various similar geminiviruses. These findings provide a novel mechanism of how virus trans-activates a plant endogenous anti-silencing machinery to gain high virulence.
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Affiliation(s)
- Yan-Wei Sun
- State Key Laboratory of Plant Genomics, Institute of
Microbiology, Chinese Academy of Sciences, Beijing
100101, China
| | - Chuan-Sia Tee
- Temasek Life Sciences Laboratory, National University of
Singapore, Singapore
117604, Singapore
| | - Yong-Huan Ma
- State Key Laboratory of Plant Genomics, Institute of
Microbiology, Chinese Academy of Sciences, Beijing
100101, China
| | - Gang Wang
- Temasek Life Sciences Laboratory, National University of
Singapore, Singapore
117604, Singapore
| | - Xiang-Mei Yao
- State Key Laboratory of Plant Genomics, Institute of
Microbiology, Chinese Academy of Sciences, Beijing
100101, China
| | - Jian Ye
- State Key Laboratory of Plant Genomics, Institute of
Microbiology, Chinese Academy of Sciences, Beijing
100101, China
- Temasek Life Sciences Laboratory, National University of
Singapore, Singapore
117604, Singapore
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Kim JY, Kwon YJ, Kim SI, Kim DY, Song JT, Seo HS. Ammonium Inhibits Chromomethylase 3-Mediated Methylation of the Arabidopsis Nitrate Reductase Gene NIA2. FRONTIERS IN PLANT SCIENCE 2015; 6:1161. [PMID: 26834755 PMCID: PMC4720742 DOI: 10.3389/fpls.2015.01161] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 12/07/2015] [Indexed: 05/10/2023]
Abstract
Gene methylation is an important mechanism regulating gene expression and genome stability. Our previous work showed that methylation of the nitrate reductase (NR) gene NIA2 was dependent on chromomethylase 3 (CMT3). Here, we show that CMT3-mediated NIA2 methylation is regulated by ammonium in Arabidopsis thaliana. CHG sequences (where H can be A, T, or C) were methylated in NIA2 but not in NIA1, and ammonium [(NH4)2SO4] treatment completely blocked CHG methylation in NIA2. By contrast, ammonium had no effect on CMT3 methylation, indicating that ammonium negatively regulates CMT3-mediated NIA2 methylation without affecting CMT3 methylation. Ammonium upregulated NIA2 mRNA expression, which was consistent with the repression of NIA2 methylation by ammonium. Ammonium treatment also reduced the overall genome methylation level of wild-type Arabidopsis. Moreover, CMT3 bound to specific promoter and intragenic regions of NIA2. These combined results indicate that ammonium inhibits CMT3-mediated methylation of NIA2 and that of other target genes, and CMT3 selectively binds to target DNA sequences for methylation.
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Affiliation(s)
- Joo Yong Kim
- Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Ye Jin Kwon
- Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Sung-Il Kim
- Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Do Youn Kim
- Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
| | - Jong Tae Song
- School of Applied Biosciences, Kyungpook National UniversityDaegu, South Korea
| | - Hak Soo Seo
- Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National UniversitySeoul, South Korea
- Plant Genomics and Breeding Institute, Seoul National UniversitySeoul, South Korea
- Bio-MAX Institute, Seoul National UniversitySeoul, South Korea
- *Correspondence: Hak Soo Seo,
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