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Divya K, Thangaraj M, Krishna Radhika N. CRISPR/Cas9: an advanced platform for root and tuber crops improvement. Front Genome Ed 2024; 5:1242510. [PMID: 38312197 PMCID: PMC10836405 DOI: 10.3389/fgeed.2023.1242510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 12/26/2023] [Indexed: 02/06/2024] Open
Abstract
Root and tuber crops (RTCs), which include cassava, potato, sweet potato, and yams, principally function as staple crops for a considerable fraction of the world population, in addition to their diverse applications in nutrition, industry, and bioenergy sectors. Even then, RTCs are an underutilized group considering their potential as industrial raw material. Complexities in conventional RTC improvement programs curb the extensive exploitation of the potentials of this group of crop species for food, energy production, value addition, and sustainable development. Now, with the advent of whole-genome sequencing, sufficient sequence data are available for cassava, sweet potato, and potato. These genomic resources provide enormous scope for the improvement of tuber crops, to make them better suited for agronomic and industrial applications. There has been remarkable progress in RTC improvement through the deployment of new strategies like gene editing over the last decade. This review brings out the major areas where CRISPR/Cas technology has improved tuber crops. Strategies for genetic transformation of RTCs with CRISPR/Cas9 constructs and regeneration of edited lines and the bottlenecks encountered in their establishment are also discussed. Certain attributes of tuber crops requiring focus in future research along with putative editing targets are also indicated. Altogether, this review provides a comprehensive account of developments achieved, future lines of research, bottlenecks, and major experimental concerns regarding the establishment of CRISPR/Cas9-based gene editing in RTCs.
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Affiliation(s)
- K Divya
- ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, India
| | | | - N Krishna Radhika
- ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, India
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Li X, Niu G, Fan Y, Liu W, Wu Q, Yu C, Wang J, Xiao Y, Hou L, Jin D, Chen S, Hu R, Yang Y, Pei Y. Synthetic dual hormone-responsive promoters enable engineering of plants with broad-spectrum resistance. PLANT COMMUNICATIONS 2023:100596. [PMID: 36998212 PMCID: PMC10363552 DOI: 10.1016/j.xplc.2023.100596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/17/2023] [Accepted: 03/23/2023] [Indexed: 06/19/2023]
Abstract
In plant immunity, the mutually antagonistic hormones salicylic acid (SA) and jasmonic acid (JA) are implicated in resistance to biotrophic and necrotrophic pathogens, respectively. Promoters that can respond to both SA and JA signals are urgently needed to engineer plants with enhanced resistance to a broad spectrum of pathogens. However, few natural pathogen-inducible promoters are available for this purpose. To address this problem, we have developed a strategy to synthesize dual SA- and JA-responsive promoters by combining SA- and JA-responsive cis elements based on the interaction between their cognate trans-acting factors. The resulting promoters respond rapidly and strongly to both SA and Methyl Jasmonate (MeJA), as well as different types of phytopathogens. When such a synthetic promoter was used to control expression of an antimicrobial peptide, transgenic plants displayed enhanced resistance to a diverse range of biotrophic, necrotrophic, and hemi-biotrophic pathogens. A dual-inducible promoter responsive to the antagonistic signals auxin and cytokinin was generated in a similar manner, confirming that our strategy can be used for the design of other biotically or abiotically inducible systems.
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Affiliation(s)
- Xianbi Li
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Guoqing Niu
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Yanhua Fan
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Wenying Liu
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Qian Wu
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Chen Yu
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Jian Wang
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Yuehua Xiao
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Lei Hou
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Dan Jin
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Song Chen
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Rongyu Hu
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Yumei Yang
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China
| | - Yan Pei
- Chongqing Key Laboratory of Application and Safety Control of Genetically Modified Crops, Beibei, Chongqing 400716, China; Biotechnology Research Center, Southwest University, Beibei, Chongqing 400716, China.
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Zhang H, Gao X, Zhi Y, Li X, Zhang Q, Niu J, Wang J, Zhai H, Zhao N, Li J, Liu Q, He S. A non-tandem CCCH-type zinc-finger protein, IbC3H18, functions as a nuclear transcriptional activator and enhances abiotic stress tolerance in sweet potato. THE NEW PHYTOLOGIST 2019; 223:1918-1936. [PMID: 31091337 DOI: 10.1111/nph.15925] [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: 04/28/2019] [Accepted: 05/08/2019] [Indexed: 05/21/2023]
Abstract
CCCH-type zinc-finger proteins play essential roles in regulating plant development and stress responses. However, the molecular and functional properties of non-tandem CCCH-type zinc-finger (non-TZF) proteins have been rarely characterized in plants. Here, we report the biological and molecular characterization of a sweet potato non-TZF gene, IbC3H18. We show that IbC3H18 exhibits tissue- and abiotic stress-specific expression, and could be effectively induced by abiotic stresses, including NaCl, polyethylene glycol (PEG) 6000, H2 O2 and abscisic acid (ABA) in sweet potato. Accordingly, overexpression of IbC3H18 led to increased, whereas knock-down of IbC3H18 resulted in decreased tolerance of sweet potato to salt, drought and oxidation stresses. In addition, IbC3H18 functions as a nuclear transcriptional activator and regulates the expression of a range of abiotic stress-responsive genes involved in reactive oxygen species (ROS) scavenging, ABA signaling, photosynthesis and ion transport pathways. Moreover, our data demonstrate that IbC3H18 physically interacts with IbPR5, and that overexpression of IbPR5 enhances salt and drought tolerance in transgenic tobacco plants. Collectively, our data indicate that IbC3H18 functions in enhancing abiotic stress tolerance in sweet potato, which may serve as a candidate gene for use in improving abiotic stress resistance in crops.
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Affiliation(s)
- Huan Zhang
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Xiaoru Gao
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Yuhai Zhi
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Xu Li
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Qian Zhang
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Jinbiao Niu
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Jun Wang
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Hong Zhai
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Ning Zhao
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Jigang Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Qingchang Liu
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Shaozhen He
- Key Laboratory of Sweet Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs/Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis & Utilization and Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education, College of Agronomy & Biotechnology, China Agricultural University, Beijing, 100193, China
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Shin SY, Kim MH, Kim YH, Park HM, Yoon HS. Co-expression of monodehydroascorbate reductase and dehydroascorbate reductase from Brassica rapa effectively confers tolerance to freezing-induced oxidative stress. Mol Cells 2013; 36:304-15. [PMID: 24170089 PMCID: PMC3887988 DOI: 10.1007/s10059-013-0071-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 08/20/2013] [Accepted: 08/26/2013] [Indexed: 01/01/2023] Open
Abstract
Plants are exposed to various environmental stresses and have therefore developed antioxidant enzymes and molecules to protect their cellular components against toxicity derived from reactive oxygen species (ROS). Ascorbate is a very important antioxidant molecule in plants, and monodehydroascorbate reductase (MDHAR; EC 1.6.5.4) and dehydroascorbate reductase (DHAR; EC 1.8.5.1) are essential to regeneration of ascorbate for maintenance of ROS scavenging ability. The MDHAR and DHAR genes from Brassica rapa were cloned, transgenic plants overexpressing either BrMDHAR and BrDHAR were established, and then, each transgenic plant was hybridized to examine the effects of co-expression of both genes conferring tolerance to freezing. Transgenic plants co-overexpressing BrMDHAR and BrDHAR showed activated expression of relative antioxidant enzymes, and enhanced levels of glutathione and phenolics under freezing condition. Then, these alteration caused by co-expression led to alleviated redox status and lipid peroxidation and consequently conferred improved tolerance against severe freezing stress compared to transgenic plants overexpressing single gene. The results of this study suggested that although each expression of BrMDHAR or BrDHAR was available to according tolerance to freezing, the simultaneous expression of two genes generated synergistic effects conferring improved tolerance more effectively even severe freezing.
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Affiliation(s)
| | | | | | | | - Ho-Sung Yoon
- Advanced Bio-resource Research Center/Department of Biology, Kyungpook National University, Daegu 702-701, Korea
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Kim YH, Lee HS, Kwak SS. Differential responses of sweetpotato peroxidases to heavy metals. CHEMOSPHERE 2010; 81:79-85. [PMID: 20638101 DOI: 10.1016/j.chemosphere.2010.06.063] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Revised: 06/24/2010] [Accepted: 06/24/2010] [Indexed: 05/29/2023]
Abstract
Oxidative stress is one of the major causes of damage in plants exposed to different types of environmental stress, including heavy metals. Accumulation of heavy metals in plants can disrupt many cellular functions and plant growth. To assess the contribution of oxidative stress to heavy metal toxicity in plants, young sweetpotato plants (Ipomoea batatas) were treated with increasing concentrations of Cd, Cu and Zn, and grown in half Murashige and Skoog nutrient solution culture. Plant growth was significantly inhibited and internal metal content was increased in a dose-dependent manner for each metal. The generation of H(2)O(2) in leaves and fibrous roots correlated positively with metal dose. The specific activity of peroxidases (PODs) in fibrous roots was markedly enhanced by metal treatment, whereas in leaves, activity was low and only slightly affected by metal treatment. Analysis of 13 POD genes revealed differential expression of PODs in response to heavy metals. Several genes for acidic PODs (swpa2, swpa3 and swpa4) and basic PODs (swpb1, swpb3 and swpab4) were strongly expressed under all metal treatment conditions in leaves or fibrous roots. The expression of swpa1 was increased in leaves and fibrous roots by Cd and Cu treatment, whereas swpb5 expression was reduced by all metals in fibrous roots. These results indicate that increased H(2)O(2) levels in response to heavy metal stress are closely linked to an improved antioxidant defense capability mediated by POD.
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Affiliation(s)
- Yun-Hee Kim
- Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-806, Republic of Korea
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