1
|
Hu Y, Tian C, Feng Y, Ma W, Zhang Y, Yang Q, Zhang X. Transgenic early japonica rice: Integration and expression characterization of stem borer resistance Bt gene. Gene 2024; 927:148753. [PMID: 38972556 DOI: 10.1016/j.gene.2024.148753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 06/22/2024] [Accepted: 07/04/2024] [Indexed: 07/09/2024]
Abstract
BACKGROUND Transgenic insect-resistant rice offers an environmentally friendly approach to mitigate yield losses caused by lepidopteran pests, such as stem borers. Bt (Bacillus thuringiensis) genes encode insecticidal proteins and are widely used to confer insect resistance to genetically modified crops. This study investigated the integration, inheritance, and expression characteristics of codon-optimised synthetic Bt genes, cry1C* and cry2A*, in transgenic early japonica rice lines. METHODS The early japonica rice cultivar, Songgeng 9 (Oryza sativa), was transformed with cry1C* or cry2A*, which are driven by the ubi promoter via Agrobacterium tumefaciens-mediated transformation. Molecular analyses, including quantitative PCR (qPCR), enzyme-linked immunosorbent assay (ELISA), and Southern blot analysis were performed to confirm transgene integration, inheritance, transcriptional levels, and protein expression patterns across different tissues and developmental stages. RESULTS Stable transgenic early japonica lines exhibiting single-copy transgene integration were established. Transcriptional analysis revealed variations in Bt gene expression among lines, tissues, and growth stages, with higher expression levels observed in leaves than in other organs. Notably, cry2A* exhibited consistently higher mRNA and protein levels than cry1C* across all examined tissues and developmental time points. Bt protein accumulation followed the trend of leaves > stem sheaths > young panicles > brown rice, with peak expression during the filling stage in the vegetative tissues. CONCLUSIONS Synthetic cry2A* displayed markedly elevated transcription and translation compared to cry1C* in the transgenic early japonica rice lines examined. Distinct spatiotemporal patterns of Bt gene expression were elucidated, providing insights into the potential insect resistance conferred by these genes in rice. These findings will contribute to the development of insect-resistant japonica rice varieties and facilitate the rational deployment of Bt crops.
Collapse
Affiliation(s)
- Yueting Hu
- Rice Research Institute, Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, China.
| | - Chongbing Tian
- Rice Research Institute, Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, China
| | - Yanjiang Feng
- Rice Research Institute, Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, China
| | - Wendong Ma
- Rice Research Institute, Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, China
| | - Yunjiang Zhang
- Rice Research Institute, Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, China
| | - Qing Yang
- Rice Research Institute, Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, China
| | - Xirui Zhang
- Rice Research Institute, Heilongjiang Academy of Agricultural Sciences, Jiamusi 154026, China
| |
Collapse
|
2
|
Niu X, Jiang J, Sun Y, Hull JJ, Ma W, Hua H, Lin Y. Knockdown of MAPK p38-linked genes increases the susceptibility of Chilo suppressalis larvae to various transgenic Bt rice lines. Int J Biol Macromol 2024; 266:130815. [PMID: 38537847 DOI: 10.1016/j.ijbiomac.2024.130815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/11/2024] [Accepted: 03/10/2024] [Indexed: 04/01/2024]
Abstract
Bacillus thuringiensis (Bt) toxins have provided exceptional control of agricultural insect pests, however, over reliance on the proteins would potentially contribute to the development of field tolerance. Developing new sustainable insect pest control methods that target the mechanisms underlying Bt tolerance can potentially support the Bt control paradigm while also providing insights into basic insect physiology. The MAPK p38 pathway is strongly associated with Bt tolerance in Chilo suppressalis, a major pest of rice. To gain insights into how this pathway impacts tolerance, high-throughput screening of C. suppressalis larval midguts initially identified eight novel target genes. Increased larval sensitivity to the transgenic cry1Ca rice strain T1C-19 was observed following RNA interference-mediated knockdown of four of the genes, Cscnc, Csgcp, Cszfp26 and CsZMYM1. Similar enhanced sensitivity to the TT51 (expressing Cry1Ab/1Ac) and T2A-1 (expressing Cry2Aa) transgenic rice lines occurred when Cszfp26 and CsZMYM1 were knocked down. All four target genes are downstream of the MAPK p38 pathway but do not participate in negative feedback loop of the pathway. These results implicate Cscnc, Csgcp, Cszfp and CsZMYM1 in the C. suppressalis transgenic cry1Ca rice tolerance mechanism regulated by MAPK p38. These findings further enhance our understanding of the MAPK p38-dependent molecular mechanisms underlying Bt tolerance in C. suppressalis and open new avenues of tolerance management to develop.
Collapse
Affiliation(s)
- Xurong Niu
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China; Pest Management and Biocontrol Research Unit, US Arid Land Agricultural Research Center, USDA Agricultural Research Services, Maricopa, AZ 85138, United States
| | - Jialiang Jiang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China; Pest Management and Biocontrol Research Unit, US Arid Land Agricultural Research Center, USDA Agricultural Research Services, Maricopa, AZ 85138, United States
| | - Yajie Sun
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China; Pest Management and Biocontrol Research Unit, US Arid Land Agricultural Research Center, USDA Agricultural Research Services, Maricopa, AZ 85138, United States
| | - J Joe Hull
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China; Pest Management and Biocontrol Research Unit, US Arid Land Agricultural Research Center, USDA Agricultural Research Services, Maricopa, AZ 85138, United States
| | - Weihua Ma
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China; Pest Management and Biocontrol Research Unit, US Arid Land Agricultural Research Center, USDA Agricultural Research Services, Maricopa, AZ 85138, United States
| | - Hongxia Hua
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China; Pest Management and Biocontrol Research Unit, US Arid Land Agricultural Research Center, USDA Agricultural Research Services, Maricopa, AZ 85138, United States
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China; Pest Management and Biocontrol Research Unit, US Arid Land Agricultural Research Center, USDA Agricultural Research Services, Maricopa, AZ 85138, United States
| |
Collapse
|
3
|
Chaudhary V, Kumar M, Chauhan C, Sirohi U, Srivastav AL, Rani L. Strategies for mitigation of pesticides from the environment through alternative approaches: A review of recent developments and future prospects. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120326. [PMID: 38387349 DOI: 10.1016/j.jenvman.2024.120326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/14/2024] [Accepted: 02/08/2024] [Indexed: 02/24/2024]
Abstract
Chemical-based peticides are having negative impacts on both the healths of human beings and plants as well. The World Health Organisation (WHO), reported that each year, >25 million individuals in poor nations are having acute pesticide poisoning cases along with 20,000 fatal injuries at global level. Normally, only ∼0.1% of the pesticide reaches to the intended targets, and rest amount is expected to come into the food chain/environment for a longer period of time. Therefore, it is crucial to reduce the amounts of pesticides present in the soil. Physical or chemical treatments are either expensive or incapable to do so. Hence, pesticide detoxification can be achieved through bioremediation/biotechnologies, including nano-based methodologies, integrated approaches etc. These are relatively affordable, efficient and environmentally sound methods. Therefore, alternate strategies like as advanced biotechnological tools like as CRISPR Cas system, RNAi and genetic engineering for development of insects and pest resistant plants which are directly involved in the development of disease- and pest-resistant plants and indirectly reduce the use of pesticides. Omics tools and multi omics approaches like metagenomics, genomics, transcriptomics, proteomics, and metabolomics for the efficient functional gene mining and their validation for bioremediation of pesticides also discussed from the literatures. Overall, the review focuses on the most recent advancements in bioremediation methods to lessen the effects of pesticides along with the role of microorganisms in pesticides elimination. Further, pesticide detection is also a big challenge which can be done by using HPLC, GC, SERS, and LSPR ELISA etc. which have also been described in this review.
Collapse
Affiliation(s)
- Veena Chaudhary
- Department of Chemistry, Meerut College, Meerut, Uttar-Pradesh, India
| | - Mukesh Kumar
- Department of Floriculture and Landscaping Architecture, College of Horticulture, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, Uttar Pradesh, India
| | - Chetan Chauhan
- Department of Floriculture and Landscaping Architecture, College of Horticulture, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, Uttar Pradesh, India
| | - Ujjwal Sirohi
- National Institute of Plant Genome Research, New Delhi, India
| | - Arun Lal Srivastav
- Chitkara University School of Engineering and Technology, Chitkara University, Himachal Pradesh, India.
| | - Lata Rani
- Chitkara School of Pharmacy, Chitkara University, Himachal Pradesh, India
| |
Collapse
|
4
|
Wu Y, Weng Z, Yan H, Yao Z, Li Z, Sun Y, Ma K, Hull JJ, Zhang D, Ma W, Hua H, Lin Y. The microRNA-7322-5p/p38/Hsp19 axis modulates Chilo suppressalis cell-defences against Cry1Ca: an effective target for a stacked transgenic rice approach. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:1827-1838. [PMID: 37353991 PMCID: PMC10440986 DOI: 10.1111/pbi.14095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 04/08/2023] [Accepted: 05/16/2023] [Indexed: 06/25/2023]
Abstract
Bacillus thuringiensis (Bt)-secreted crystal (Cry) toxins form oligomeric pores in host cell membranes and are a common element in generating insect-resistant transgenic crops. Although Cry toxin function has been well documented, cellular defences against pore-formation have not been as well developed. Elucidation of the processes underlying this defence, however, could contribute to the development of enhanced Bt crops. Here, we demonstrate that Cry1Ca-mediated downregulation of microRNA-7322-5p (miR-7322-5p), which binds to the 3' untranslated region of p38, negatively regulates the susceptibility of Chilo suppressalis to Cry1Ca. Moreover, Cry1Ca exposure enhanced phosphorylation of Hsp19, and hsp19 downregulation increased susceptibility to Cry1Ca. Further, Hsp19 phosphorylation occurs downstream of p38, and pull-down assays confirmed the interactions between Hsp19 and Cry1Ca, suggesting that activation of Hsp19 by the miR-7322-5p/p38/Hsp19 pathway promotes Cry1Ca sequestration. To assess the efficacy of targeting this pathway in planta, double-stranded RNA (dsRNA) targeting C. suppressalis p38 (dsp38) was introduced into a previously generated cry1Ca-expressing rice line (1CH1-2) to yield a single-copy cry1Ca/dsp38 rice line (p38-rice). Feeding on this rice line triggered a significant reduction in C. suppressalis p38 expression and the line was more resistant to C. suppressalis than 1CH1-2 in both short term (7-day) and continuous feeding bioassays as well as field trials. These findings provide new insights into invertebrate epithelium cellular defences and demonstrate a potential new pyramiding strategy for Bt crops.
Collapse
Affiliation(s)
- Yan Wu
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhanHubeiChina
- College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Zijin Weng
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhanHubeiChina
- College of Life Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Haixia Yan
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhanHubeiChina
- College of Life Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Zhuotian Yao
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhanHubeiChina
- College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Zhenzhen Li
- College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Yajie Sun
- College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Kangsheng Ma
- College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - J. Joe Hull
- U.S. Arid Land Agricultural Research Center, Department of AgricultureU.S. Agricultural Research ServiceMaricopaArizonaUSA
| | - Delin Zhang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhanHubeiChina
- College of Life Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Weihua Ma
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhanHubeiChina
- College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Hongxia Hua
- College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhanHubeiChina
- College of Life Science and TechnologyHuazhong Agricultural UniversityWuhanHubeiChina
| |
Collapse
|
5
|
Qin X, Li X, Xiao J, Wu Q, Li Y, Li C, Jiang D, Tang T, Nan W, Liang Y, Zhang H. Transcriptomic and Physiological Analyses of Two Rice Restorer Lines under Different Nitrogen Supplies Provide Novel Insights into Hybrid Rice Breeding. PLANTS (BASEL, SWITZERLAND) 2023; 12:2276. [PMID: 37375901 DOI: 10.3390/plants12122276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/02/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023]
Abstract
Improving plant nitrogen-use efficiency (NUE) has great significance for various crops, particularly in hybrid breeding. Reducing nitrogen inputs is key to achieving sustainable rice production and mitigating environmental problems. In this study, we analyzed the transcriptomic and physiological changes in two indica restorer lines (Nanhui511 [NH511] and Minghui23 [MH23]) under high nitrogen (HN) and low nitrogen (LN) conditions. Compared to MH23, NH511 was more sensitive to different nitrogen supplies and exhibited higher nitrogen uptake and NUE under HN conditions by increasing lateral root and tiller numbers in the seedling and maturation stages, respectively. NH511 also exhibited a lower survival rate than MH23 when planted in a chlorate-containing hydroponic solution, indicating its HN uptake ability under different nitrogen-supply conditions. Transcriptomic analysis showed that NH511 has 2456 differentially expressed genes, whereas MH23 had only 266. Furthermore, these genes related to nitrogen utilization showed differential expression in NH511 under HN conditions, while the opposite was observed in MH23. Our findings revealed that NH511 could be regarded as elite rice and used for breeding high-NUE restorer lines by regulating and integrating nitrogen-utilization genes, which provides novel insights for the cultivation of high-NUE hybrid rice.
Collapse
Affiliation(s)
- Xiaojian Qin
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
- Key Laboratory of Molecular Biology of Plants Environmental Adaptations, Chongqing Normal University, Chongqing 401331, China
| | - Xiaowei Li
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Juan Xiao
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Qian Wu
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Yuntong Li
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Cuiping Li
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Dan Jiang
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Tingting Tang
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Wenbin Nan
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
- Key Laboratory of Molecular Biology of Plants Environmental Adaptations, Chongqing Normal University, Chongqing 401331, China
| | - Yongshu Liang
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
- Key Laboratory of Molecular Biology of Plants Environmental Adaptations, Chongqing Normal University, Chongqing 401331, China
| | - Hanma Zhang
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
- Key Laboratory of Molecular Biology of Plants Environmental Adaptations, Chongqing Normal University, Chongqing 401331, China
| |
Collapse
|
6
|
Chen H, Huang Y, Ye M, Wang Y, He X, Tu J. Achieving High Expression of Cry in Green Tissues and Negligible Expression in Endosperm Simultaneously via rbcS Gene Fusion Strategy in Rice. Int J Mol Sci 2023; 24:ijms24109045. [PMID: 37240390 DOI: 10.3390/ijms24109045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023] Open
Abstract
To allay excessive public concern about the safety of transgenic foods, and to optimize insect-resistant genes expression to delay the evolution of resistance in pests, we developed a promising strategy to fuse the GOI (gene of interest) with OsrbcS (rice small subunit of ribulose bisphosphate carboxylase/oxygenase) in transgenic rice, which acted as a carrier, driven by the OsrbcS native promoter to sequester its expression in green tissues. Using eYFP as a trial, we reported a high-level accumulation of eYFP in green tissue and almost none in the seed and root of the fused construct compared to the non-fused construct. After applying this fusion strategy in insect-resistant rice breeding, recombinant OsrbcS-Cry1Ab/Cry1Ac expressed rice plants conferred high resistance to leaffolders and striped stem borers, among which two single-copy lines possessed normal agronomic performance in the field. Specifically, Cry1Ab/Cry1Ac protein levels in single-copy construct transgenic lines ranged from 1.8 to 11.5 µg g-1 in the leaf, higher than the Actin I promoter-driven control, T51-1, about 1.78 µg g-1 in the leaf, but negligible (only 0.00012-0.00117 µg g-1) in endosperm by ELISA analysis. Our study provided a novel approach to creating Cry1Ab/Cry1Ac-free endosperm rice with a high level of insect-resistant protein in green tissues through the simultaneous usage of the OsrbcS promoter and OsrbcS as a fusion partner.
Collapse
Affiliation(s)
- Hao Chen
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
| | - Yuqing Huang
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Mengnan Ye
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Ya Wang
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Xiuying He
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
| | - Jumin Tu
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| |
Collapse
|
7
|
Fu J, Liu B. Individual and combined effects of land use and weeds on Cry1Ab/c protein expression and yield of transgenic cry1Ab/c rice. GM CROPS & FOOD 2022; 13:156-170. [PMID: 35946863 PMCID: PMC9367653 DOI: 10.1080/21645698.2022.2107385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Jianmei Fu
- State Environmental Protection Key Laboratory on Biosafety, Research Center for Biodiversity Conservation and Biosafety, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, Jiangsu, China
- Department of Rice Pest, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Biao Liu
- State Environmental Protection Key Laboratory on Biosafety, Research Center for Biodiversity Conservation and Biosafety, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, Jiangsu, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| |
Collapse
|
8
|
Sun Y, Gong Y, He Q, Kuang S, Gao Q, Ding W, He H, Xue J, Li Y, Qiu L. FAR knockout significantly inhibits Chilo suppressalis survival and transgene expression of double-stranded FAR in rice exhibits strong pest resistance. PLANT BIOTECHNOLOGY JOURNAL 2022; 20:2272-2283. [PMID: 36028465 PMCID: PMC9674317 DOI: 10.1111/pbi.13906] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 07/04/2022] [Accepted: 07/30/2022] [Indexed: 05/05/2023]
Abstract
Chilo suppressalis is one of the most prevalent and damaging rice pests, causing significant economic losses each year. Chemical control is currently the primary method of controlling C. suppressalis. However, the indiscriminate use of chemical insecticides increases pest resistance, pollutes the environment and poses a significant health threat to humans and livestock, highlighting the need to find safer, more pest-specific and more effective alternatives to pest control. Plant-mediated RNA interference (RNAi) is a promising agricultural pest control method that is highly pest-specific and has less of an impact on the environment. Using multi-sgRNAs/Cas9 technology to delete Fatty acyl-CoA reductase (FAR) of C. suppressalis in the G0 generation, we show that downregulating FAR transcription may significantly increase the mortality rate and darken the epidermis of C. suppressalis compared with the control. Subsequently, we developed dsFAR transgenic rice lines using Agrobacterium-mediated genetic transformation and then screened three strains expressing dsFAR at high levels using transcriptional level analysis. Using transgenic rice stems, a laboratory feeding bioassay indicated that at least one line (L#10) displayed a particularly high level of insect resistance, with an insect mortality rate of more than 80%. In the field trials, dsFAR transgenic rice displayed high levels of resistance to C. suppressalis damage. Collectively, these results suggest the potential of a new environment-friendly, species-specific strategy for rice pest management.
Collapse
Affiliation(s)
- Yingjuan Sun
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
| | - Youwei Gong
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
| | - Qingzhen He
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
| | - Suijie Kuang
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
| | - Qiao Gao
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
| | - Wenbing Ding
- National Research Center of Engineering & Technology for Utilization of Botanical Functional IngredientsHunan Agricultural UniversityChangshaChina
- Hunan Provincial Engineering & Technology Research Center for Biopesticide and Formulation ProcessingChangshaChina
| | - Hualiang He
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
| | - Jin Xue
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
| | - Youzhi Li
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
- National Research Center of Engineering & Technology for Utilization of Botanical Functional IngredientsHunan Agricultural UniversityChangshaChina
| | - Lin Qiu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant ProtectionHunan Agricultural UniversityChangshaChina
| |
Collapse
|
9
|
Wang X, Yao Z, Huang H, Liang Y, Liu Y. The long-term persistence of transgenic volunteers in wild mustard and rice populations. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 186:252-256. [PMID: 35930937 DOI: 10.1016/j.plaphy.2022.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 07/12/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
The undesired presence of GM plants outside of cultivation is one of main concerns for the ecological risk assessment and regulation of GM plants, and how long transgenic volunteers can persist in the nature remains unknown. We conducted two long-term coexistence experiments of Bt-transgenic insect-resistant crops in populations of their wild relatives, using Bt-transgenic oilseed rape (Brassica napus) in wild mustard (B. juncea) populations from 2012 to 2019, and Bt-transgenic rice (Oryza sativa) in wild rice (O. rufipogon and O. minuta) populations from 2013 to 2019. Transgenic oilseed rape volunteers survived only in the 2012 winter, because it is a spring variety and not be resistant to cold climate and competition from weeds. Transgenic rice was not survived because of its low competitive ability compared to wild rice, but survived five years in one population of wild rice O. minuta who could not tolerant to cold temperature. Our results indicated that transgenic volunteers can persist in the wild populations under natural conditions, but the fate of transgenic volunteers in the nature depends on whether the growth environment is favorable, and they could not disperse over its niche or "tolerance zone".
Collapse
Affiliation(s)
- Xinyu Wang
- State Environment Protection Key Laboratory of Regional Ecological Process and Functional Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beijing, 100012, China.
| | - Zhi Yao
- State Environment Protection Key Laboratory of Regional Ecological Process and Functional Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beijing, 100012, China.
| | - Hai Huang
- State Environment Protection Key Laboratory of Regional Ecological Process and Functional Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beijing, 100012, China.
| | - Yuyong Liang
- Institute of Plant Protection, Jiangxi Academy of Agricultural Sciences, Nanchang, China.
| | - Yongbo Liu
- State Environment Protection Key Laboratory of Regional Ecological Process and Functional Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beijing, 100012, China.
| |
Collapse
|
10
|
Wang J, Tan Y, Shao Y, Shi X, Zhang G. Changes in the Abundance and Community Complexity of Soil Nematodes in Two Rice Cultivars Under Elevated Ozone. Front Microbiol 2022; 13:916875. [PMID: 35774463 PMCID: PMC9238508 DOI: 10.3389/fmicb.2022.916875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/11/2022] [Indexed: 11/17/2022] Open
Abstract
The atmospheric ozone concentrations have substantially increased in the surface layer over the past decades, and consequently exhibited a strong influence on soil microbial communities and functions. However, the effect of elevated ozone (eO3) on the abundance, diversity, and structural complexity of soil nematode communities are elusive under different rice (Oryza sativa L.) cultivars. Here, the soil nematode community was investigated in two rice cultivars (Hybrid, Shanyou 63 vs. Japonica, Wuyujing 3) under open-top chambers (OTC) with control and eO3 conditions. The results showed that the abundance of soil nematode community was altered by eO3, but the responses were dependent on crop cultivars. The eO3 decreased the total abundance and simplified the network complexity of the soil nematode community for both cultivars. However, eO3 increased the abundance of c-p 4 in Shanyou 63, rather than Wuyujing 3, indicating that the hybrid rice cultivar could tradeoff the adverse impacts of eO3 on the functional group of soil nematodes. Similarly, bacterivores belonging to K-strategy (c-p 4) increased under eO3 in Shanyou 63, suggesting that the soil food web formed a bacteria-dominated channel under eO3 for the hybrid rice cultivar. This study shed new light on the critical importance of rice cultivars in shaping the impacts of eO3 on the soil micro-food web. Therefore, breeding and biotechnological approaches may become valuable pathways to improve soil health by shaping the community structures of the soil micro-food web in response to climate change in the future.
Collapse
Affiliation(s)
- Jianqing Wang
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou, China
| | - Yunyan Tan
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou, China
| | - Yajun Shao
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou, China
| | - Xiuzhen Shi
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou, China
- *Correspondence: Xiuzhen Shi
| | - Guoyou Zhang
- Key Laboratory of Agrometeorology of Jiangsu Province, School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, China
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Agricultural College of Yangzhou University, Yangzhou, China
- Guoyou Zhang
| |
Collapse
|
11
|
Kumari P, Jasrotia P, Kumar D, Kashyap PL, Kumar S, Mishra CN, Kumar S, Singh GP. Biotechnological Approaches for Host Plant Resistance to Insect Pests. Front Genet 2022; 13:914029. [PMID: 35719377 PMCID: PMC9201757 DOI: 10.3389/fgene.2022.914029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/16/2022] [Indexed: 11/14/2022] Open
Abstract
Annually, the cost of insect pest control in agriculture crosses billions of dollars around the world. Until recently, broad-spectrum synthetic pesticides were considered as the most effective means of pest control in agriculture. However, over the years, the overreliance on pesticides has caused adverse effects on beneficial insects, human health and the environment, and has led to the development of pesticide resistant insects. There is a critical need for the development of alternative pest management strategies aiming for minimum use of pesticides and conservation of natural enemies for maintaining the ecological balance of the environment. Host plant resistance plays a vital role in integrated pest management but the development of insect-resistant varieties through conventional ways of host plant resistance takes time, and is challenging as it involves many quantitative traits positioned at various loci. Biotechnological approaches such as gene editing, gene transformation, marker-assisted selection etc. in this direction have recently opened up a new era of insect control options. These could contribute towards about exploring a much wider array of novel insecticidal genes that would otherwise be beyond the scope of conventional breeding. Biotechnological interventions can alter the gene expression level and pattern as well as the development of transgenic varieties with insecticidal genes and can improve pest management by providing access to novel molecules. This review will discuss the emerging biotechnological tools available to develop insect-resistant engineered crop genotypes with a better ability to resist the attack of insect pests.
Collapse
Affiliation(s)
- Pritam Kumari
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
- CCS Haryana Agricultural University, Hisar, India
| | - Poonam Jasrotia
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| | - Deepak Kumar
- CCS Haryana Agricultural University, Hisar, India
| | - Prem Lal Kashyap
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| | - Satish Kumar
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| | | | - Sudheer Kumar
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| | | |
Collapse
|
12
|
Cross-Kingdom Comparative Transcriptomics Reveals Conserved Genetic Modules in Response to Cadmium Stress. mSystems 2021; 6:e0118921. [PMID: 34874779 PMCID: PMC8651089 DOI: 10.1128/msystems.01189-21] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
It is known that organisms have developed various mechanisms to cope with cadmium (Cd) stress, while we still lack a system-level understanding of the functional isomorphy among them. In the present study, a cross-kingdom comparison was conducted among Escherichia coli, Saccharomyces cerevisiae, and Chlamydomonas reinhardtii, through toxicological tests, comparative transcriptomics, as well as conventional functional genomics. An equivalent level of Cd stress was determined via inhibition tests. Through transcriptome comparison, the three organisms exhibited differential gene expression under the same Cd stress relative to the corresponding no-treatment control. Results from functional enrichment analysis of differentially expressed genes (DEGs) showed that four metabolic pathways responsible for combating Cd stress were commonly regulated in the three organisms, including antioxidant reactions, sulfur metabolism, cell wall remodeling, and metal transport. In vivo expression patterns of 43 DEGs from the four pathways were further examined using quantitative PCR and resulted in a relatively comparable dynamic of gene expression patterns with transcriptome sequencing (RNA-seq). Cross-kingdom comparison of typical Cd stress-responding proteins resulted in the detection of 12 groups of homologous proteins in the three species. A class of potential metal transporters were subjected to cross-transformation to test their functional complementation. An ABC transporter gene in E. coli, possibly homologous to the yeast ycf1, was heterologously expressed in S. cerevisiae, resulting in enhanced Cd tolerance. Overall, our findings indicated that conserved genetic modules against Cd toxicity were commonly regulated among distantly related microbial species, which will be helpful for utilizing them in modifying microbial traits for bioremediation. IMPORTANCE Research is establishing a systems biology view of biological response to Cd stress. It is meaningful to explore whether there is regulatory isomorphy among distantly related organisms. A transcriptomic comparison was done among model microbes, leading to the identification of a conserved cellular model pinpointing the generic strategies utilized by microbes for combating Cd stress. A novel E. coli transporter gene substantially increased yeast’s Cd tolerance. Knowledge on systems understanding of the cellular response to metals provides the basis for developing bioengineering remediation technology.
Collapse
|
13
|
Verma V, Vishal B, Kohli A, Kumar PP. Systems-based rice improvement approaches for sustainable food and nutritional security. PLANT CELL REPORTS 2021; 40:2021-2036. [PMID: 34591154 DOI: 10.1007/s00299-021-02790-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 09/15/2021] [Indexed: 06/13/2023]
Abstract
An integrated research approach to ensure sustainable rice yield increase of a crop grown by 25% of the world's farmers in 10% of cropland is essential for global food security. Rice, being a global staple crop, feeds about 56% of the world population and sustains 40% of the world's poor. At ~ $200 billion, it also accounts for 13% of the annual crop value. With hunger and malnutrition rampant among the poor, rice research for development is unique in global food and nutrition security. A systems-based, sustainable increase in rice quantity and quality is imperative for environmental and biodiversity benefits. Upstream 'discovery' through biotechnology, midstream 'development' through breeding and agronomy, downstream 'dissemination and deployment' must be 'demand-driven' for 'distinct socio-economic transformational impacts'. Local agro-ecology and livelihood nexus must drive the research agenda for targeted benefits. This necessitates sustained long-term investments by government, non-government and private sectors to secure the future food, nutrition, environment, prosperity and equity status.
Collapse
Affiliation(s)
- Vivek Verma
- Department of Biotechnology, School of Life Sciences, Central University of Rajasthan, Ajmer, 305817, Rajasthan, India.
| | - Bhushan Vishal
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Republic of Singapore
| | - Ajay Kohli
- Strategic Innovation Platform, International Rice Research Institute, DAPO 7777, Metro Manila, Philippines
| | - Prakash P Kumar
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543, Republic of Singapore.
| |
Collapse
|
14
|
Wu N, Shi W, Liu W, Gao Z, Han L, Wang X. Differential impact of Bt-transgenic rice plantings on bacterial community in three niches over consecutive years. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 223:112569. [PMID: 34352582 DOI: 10.1016/j.ecoenv.2021.112569] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/11/2021] [Accepted: 07/25/2021] [Indexed: 05/26/2023]
Abstract
Transgenic-Bacillus thuringiensis (Bt) crops express insecticidal proteins, which can accumulate in plants and soil where they may influence microbial populations. The impact of Bt crops on bacterial communities has only been assessed under short-term, and results have been contradictory. Here, we analyzed the bacterial communities in three niches, rhizosphere soil (RS), root endosphere (RE) and leaf endosphere (LE), of three Bt rice and their non-Bt parental lines for three consecutive years by high-throughput sequencing. In principal coordinate analysis (PCoA) and PERMANOVA (Adonis) analysis, operational taxonomic units (OTUs) were clustered primarily by niche type and differed significantly in the RE and LE but not in the RS between each of three Bt lines compared with the non-Bt rice line, and not in each respective niche among the three Bt rice lines. The bacterial communities in the RS of different rice lines over the 3 years were clustered mainly by year rather than by lines. The differential bacterial taxa among the lines did not overlap between years, presumably because Cry proteins are rapidly degraded in the soil. A network analysis of RS bacterial communities showed that the network complexity and density for the three Bt rice lines did not decrease compared with those for the non-Bt line. In conclusion, our results demonstrated that bacterial communities differed significantly in RE and LE between Bt and non-Bt rice lines, but the differences were mild and transient, and had no adverse impact on RS over the 3 years. This study provides favorable evidence in support of the commercialization of Bt rice.
Collapse
Affiliation(s)
- Nan Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Wencong Shi
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an 271018, China
| | - Wenwen Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Zheng Gao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an 271018, China
| | - Lanzhi Han
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Xifeng Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| |
Collapse
|
15
|
Peng C, Mei Y, Ding L, Wang X, Chen X, Wang J, Xu J. Using Combined Methods of Genetic Mapping and Nanopore-Based Sequencing Technology to Analyze the Insertion Positions of G10evo-EPSPS and Cry1Ab/Cry2Aj Transgenes in Maize. FRONTIERS IN PLANT SCIENCE 2021; 12:690951. [PMID: 34394143 PMCID: PMC8358107 DOI: 10.3389/fpls.2021.690951] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
The insertion position of the exogenous fragment sequence in a genetically modified organism (GMO) is important for the safety assessment and labeling of GMOs. SK12-5 is a newly developed transgenic maize line transformed with two trait genes [i.e., G10evo-5-enolpyrul-shikimate-3-phosphate synthase (EPSPS) and Cry1Ab/Cry2Aj] that was recently approved for commercial use in China. In this study, we tried to determine the insertion position of the exogenous fragment for SK12-5. The transgene-host left border and right border integration junctions were obtained from SK12-5 genomic DNA by using the thermal asymmetric interlaced polymerase chain reaction (TAIL-PCR) and next-generation Illumina sequencing technology. However, a Basic Local Alignment Search Tool (BLAST) analysis revealed that the flanking sequences in the maize genome are unspecific and that the insertion position is located in a repetitive sequence area in the maize genome. To locate the fine-scale insertion position in SK12-5, we combined the methods of genetic mapping and nanopore-based sequencing technology. From a classical bulked-segregant analysis (BSA), the insertion position in SK12-5 was mapped onto Bin9.03 of chromosome 9 between the simple sequence repeat (SSR) markers umc2337 and umc1743 (26,822,048-100,724,531 bp). The nanopore sequencing results uncovered 10 reads for which one end was mapped onto the vector and the other end was mapped onto the maize genome. These observations indicated that the exogenous T-DNA fragments were putatively integrated at the position from 82,329,568 to 82,379,296 bp of chromosome 9 in the transgenic maize SK12-5. This study is helpful for the safety assessment of the novel transgenic maize SK12-5 and shows that the combined method of genetic mapping and the nanopore-based sequencing technology will be a useful approach for identifying the insertion positions of transgenic sequences in other GM plants with relatively large and complex genomes.
Collapse
Affiliation(s)
- Cheng Peng
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Yingting Mei
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lin Ding
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Xiaofu Wang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Xiaoyun Chen
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Junmin Wang
- Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Junfeng Xu
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| |
Collapse
|
16
|
Yarra R, Wei W. The NAC-type transcription factor GmNAC20 improves cold, salinity tolerance, and lateral root formation in transgenic rice plants. Funct Integr Genomics 2021; 21:473-487. [PMID: 34191184 DOI: 10.1007/s10142-021-00790-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/22/2021] [Accepted: 05/06/2021] [Indexed: 02/08/2023]
Abstract
NAC-type transcription factors are crucial players in the abiotic stress responses of plants. Soybean NAC-type transcription factor GmNAC20 was transformed into rice genome via Agrobacterium method of transformation to improve abiotic stress tolerance. Integration and expression of GmNAC20 were verified by the DNA blot hybridization, immunoblotting, RT-PCR, and quantitative RT-PCR in T3 generation of transgenic rice plants. Significant expression of GmNAC20 was found in transgenic plants under salinity, cold, and IAA treatments. The transgenic rice plants expressing GmNAC20 displayed enhanced salinity and cold stress tolerance via upregulating the abiotic stress-responsive genes. Furthermore, T3 transgenic plants retained relative water content, chlorophyll content with enhanced accumulation of proline content than wild-type plants under salinity, and cold stress environments. The decrease in MDA content and electrolyte leakage with a significant increase in antioxidant enzyme activities were noticed in transgenic rice plants under either salinity or cold stress conditions, compared to wild-type plants. Overexpression of GmNAC20 in rice plants also induced the lateral root formation, associated with upregulation of auxin signaling-related genes. Taken together, our results indicated that GmNAC20 acts as a positive regulator for conferring salinity and cold tolerance in rice plants and appropriate candidate for improving salinity and cold stress in other important food crops.
Collapse
Affiliation(s)
- Rajesh Yarra
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Wei Wei
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| |
Collapse
|
17
|
Wang Q, Shen X, Qiu T, Wu W, Li L, Wang Z, Shou H. Evaluation and application of an efficient plant DNA extraction protocol for laboratory and field testing. J Zhejiang Univ Sci B 2021; 22:99-111. [PMID: 33615751 DOI: 10.1631/jzus.b2000465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Nucleic acids in plant tissue lysates can be captured quickly by a cellulose filter paper and prepared for amplification after a quick purification. In this study, a published filter paper strip method was modified by sticking the filter paper on a polyvinyl chloride resin (PVC) sheet. This modified method is named EZ-D, for EASY DNA extraction. Compared with the original cetyl trimethylammonium bromide (CTAB) method, DNA extracted by EZ-D is more efficient in polymerase chain reaction (PCR) amplification due to the more stable performance of the EZ-D stick. The EZ-D method is also faster, easier, and cheaper. PCR analyses showed that DNA extracted from several types of plant tissues by EZ-D was appropriate for specific identification of biological samples. A regular PCR reaction can detect the EZ-D-extracted DNA template at concentration as low as 0.1 ng/μL. Evaluation of the EZ-D showed that DNA extracts could be successfully amplified by PCR reaction for DNA fragments up to 3000 bp in length and up to 80% in GC content. EZ-D was successfully used for DNA extraction from a variety of plant species and plant tissues. Moreover, when EZ-D was combined with the loop-mediated isothermal amplification (LAMP) method, DNA identification of biological samples could be achieved without the need for specialized equipment. As an optimized DNA purification method, EZ-D shows great advantages in application and can be used widely in laboratories where equipment is limited and rapid results are required.
Collapse
Affiliation(s)
- Qi Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaoxia Shen
- Zhejiang Institute of Chinese Medicine, Hangzhou 310023, China
| | - Tian Qiu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wei Wu
- Shanghai YouLong Biotech Co., Ltd., Shanghai 200063, China
| | - Lin Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Zhi'an Wang
- Zhejiang Institute of Chinese Medicine, Hangzhou 310023, China
| | - Huixia Shou
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
| |
Collapse
|
18
|
Fu J, Liu G, Liu B. Foreign Cry1Ab/c Delays Flowering in Insect-Resistant Transgenic Rice via Interaction With Hd3a Florigen. FRONTIERS IN PLANT SCIENCE 2021; 12:608721. [PMID: 33643344 PMCID: PMC7905309 DOI: 10.3389/fpls.2021.608721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
Genetic modifications in rice, which resulted in insect resistance, have been highly efficacious. However, they have also induced undesirable secondary phenotypes, such as delayed flowering. The molecular mechanisms associated with these unwanted effects remain unclear. Here, we showed that the flowering time for insect-resistant transgenic cry1Ab/c rice Huahui-1 (HH1) was delayed, compared with that for the parental rice Minghui-63 (MH63), cultivated on farmland and saline-alkaline soils. In contrast, the insect-resistant transgenic cry1C ^* rice cultivars T1C-19 and MH63 had similar flowering times under the same conditions. We quantified the following: the expression of five major flowering genes in HH1, T1C-19, and MH63; florigen Hd3a protein expression levels in HH1 and MH63; interactions between Cry1Ab/c and the five main flowering proteins; and the effects of E3s ubiquitin ligase-mediated Cry1Ab/c expression on florigen Hd3a. Hd3a transcription was significantly lower in HH1 but not in T1C-19, compared with that in MH63. The results of yeast two-hybrid, complementary bimolecular fluorescence, and co-immunoprecipitation assays revealed that florigen Hd3a interacted with the exogenous Cry1Ab/c expressed in HH1 and not the exogenous Cry1C^* expressed in T1C-19. When Cry1Ab/c, Hd3a, and E3s fusion proteins were transiently co-expressed in tobacco cells, the Hd3a expression level was significantly lower than the level of Cry1Ab/c and Hd3a co-expression. Thus, the downregulation of Hd3a expression and the interaction between Cry1Ab/c and Hd3a interfere with Hd3a protein expression and might cooperatively delay HH1 flowering time. To the best of our knowledge, this study is the first to explain the delay in flowering time in insect-resistant transgenic rice, mediated by interactions between exogenous and endogenous proteins. This information might help elucidate the molecular mechanisms associated with these unwanted phenotypes effects and improve the process of biosafety assessment of transgenic rice.
Collapse
Affiliation(s)
- Jianmei Fu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Guoqiang Liu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China
| | - Biao Liu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China
| |
Collapse
|
19
|
Fu J, Liu B, Liu L, Fang Z. Fitness of Insect-resistant transgenic rice T1C-19 under four growing conditions combining land use and weed competition. GM CROPS & FOOD 2021; 12:328-341. [PMID: 33882798 PMCID: PMC8086590 DOI: 10.1080/21645698.2021.1914290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Transgene escape into natural ecosystems through seed spraying or transgene introgression may potentially cause environmental biosafety problems. In this study, we assessed the environmental risk of insect-resistant transgenic rice entering farmland margins or natural ecosystems adjacent to farmland. Transgenic Cry1C* rice (T1C-19) was used to study the effects of exogenous Cry1C* expression on vegetative and reproductive growth indices under different growing conditions using the following four combined treatments of land use and weeds: farmland and uncultivated land without weeds (F–NW and U–NW, respectively), and farmland and uncultivated land with weeds (F–W and U–W, respectively). The expression of Cry1C* protein under the U–NW, F–W, and U–W conditions was significantly lower than under the control condition, F–NW. Tiller number, biomass, filled grain number, filled grain weight, and other vegetative and reproductive indices were significantly lower in the rice line TIC-19 than in MH63 under F–NW and U–NW conditions, indicating a significant fitness cost. However, under F–W and U–W conditions, vegetative growth indices such as plant height, tiller number, and biomass, as well as reproductive growth indices such as filled grain number per plant, filled grain weight per plant, and seed setting rate in TIC-19 were similar to those in MH63, indicating a long-term coexistence. These results indicate a lower ecological risk of T1C-19 compared to MH63 under F–NW and U–NW, although their long-term coexistence may lead to potential ecological risks under F–W and U–W.
Collapse
Affiliation(s)
- Jianmei Fu
- State Environmental Protection Key Laboratory on Biosafety, Research Center for Biodiversity Conservation and Biosafety, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China.,Department of Rice Pest, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,State Environmental Protection Scientific Observation and Research Station for Ecology and Environment of Wuyi Mountains, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China.,College of Life Sciences, Nanjing Agricultural University, Nanjing China
| | - Biao Liu
- State Environmental Protection Key Laboratory on Biosafety, Research Center for Biodiversity Conservation and Biosafety, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China.,State Environmental Protection Scientific Observation and Research Station for Ecology and Environment of Wuyi Mountains, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China
| | - Laipan Liu
- State Environmental Protection Key Laboratory on Biosafety, Research Center for Biodiversity Conservation and Biosafety, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China.,State Environmental Protection Scientific Observation and Research Station for Ecology and Environment of Wuyi Mountains, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China
| | - Zhixiang Fang
- State Environmental Protection Key Laboratory on Biosafety, Research Center for Biodiversity Conservation and Biosafety, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China.,State Environmental Protection Scientific Observation and Research Station for Ecology and Environment of Wuyi Mountains, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China
| |
Collapse
|
20
|
Majumder S, Datta K, Datta SK. Agrobacterium tumefaciens-Mediated Transformation of Rice by Hygromycin Phosphotransferase (hptII) Gene Containing CRISPR/Cas9 Vector. Methods Mol Biol 2021; 2238:69-79. [PMID: 33471325 DOI: 10.1007/978-1-0716-1068-8_5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The CRISPR/Cas9 technique for rice genome engineering is gaining momentum and requires a precise gene delivery system. For rice and other crop plants, Agrobacterium tumefaciens-mediated transformation (AMT) is considered a suitable gene transformation method. The AMT for indica-type rice is a challenge because it is less efficient in tissue culture response than japonica-type rice. Here is a protocol of the AMT method that we developed for IR64 variety which has been successfully tested in other popular indica-type rice varieties. We used embryogenic calli as explant and an empty gRNA-containing CRISPR/Cas9 vector with hptII (hygromycin phosphotransferase) gene for the transformation. This technique would speed up rice genome editing via CRISPR/Cas9 technology and facilitate to achieve varied application in the future.
Collapse
Affiliation(s)
- Shuvobrata Majumder
- Laboratory of Translational Research on Transgenic Crops, University of Calcutta, Kolkata, India
| | - Karabi Datta
- Laboratory of Translational Research on Transgenic Crops, University of Calcutta, Kolkata, India
| | - Swapan Kumar Datta
- Laboratory of Translational Research on Transgenic Crops, University of Calcutta, Kolkata, India.
| |
Collapse
|
21
|
Liu Y, Wang W, Li Y, Liu F, Han W, Li J. Transcriptomic and proteomic responses to brown plant hopper (Nilaparvata lugens) in cultivated and Bt-transgenic rice (Oryza sativa) and wild rice (O. rufipogon). J Proteomics 2020; 232:104051. [PMID: 33217583 DOI: 10.1016/j.jprot.2020.104051] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/27/2020] [Accepted: 11/15/2020] [Indexed: 10/23/2022]
Abstract
Strategies are still employed to reduce insect damage in crop production, including conventional breeding with wild germplasm resources and transgenic technology with foreign genes' insertion. Cultivated and Bt-transgenic rice (Oryza sativa) and two ecotypes of wild rice (O. rufipogon) were treated by a 72 h feeding of brown plant hopper (Nilaparvata lugens). Under the feeding of N. lugens, compared with the cultivated rice (568 and 4), more differentially expressed genes (DEGs) and differentially accumulated proteins (DAPs) were identified in transgenic rice (2098 and 11) and two wild ecotypes (1990, 39 and 1932, 25, respectively). The iTRAQ analysis showed 79 DAPs and confirmed the results of RNA-seq, which showed the least GO terms and KEGG pathways responding to herbivory in the cultivated rice. DAPs significantly enriched two GO terms that are related with Bph14 and Bph33 genes in rice. Most of DEGs and DAPs were related to plant biological processes of plant-pathogen interaction and plant hormone signal transduction, and hormone signaling and transcription factors regulate the immune response of rice to BPH. Our results demonstrated the similarity in the wild rice and Bt-transgenic rice for their transcriptomic and proteomic response to herbivory, while cultivated rice lacked enough pathways in response to herbivory. STATEMENT OF SIGNIFICANCE OF THE STUDY: The iTRAQ analysis and RNA-seq were employed 39 to identify differentially expressed genes (DEGs) and differentially accumulated proteins (DAPs) in seedlings of cultivated, Bt-transgenic and two wild rice ecotypes under feeding of brown plant hopper. Wild rice showed DEGs and DAPs related to biochemical pathways of plant pathogen interactions and plant hormone signal transductions, while cultivated rice lacked enough pathways in response to herbivory. Crop domestication weakened the response of plants to herbivory, while the insertion of Bt gene might promote the response of plants to herbivory. Growing environment plays an important role in regulating gene networks of plant response to herbivory. Our results highlighted the importance of conservation of crop wild species. SIGNIFICANCE: Insect damage is one of main factors in reducing agricultural production, and technologies and methods were employed to control insect pests in agricultural systems. Transgenic technology is developed to produce insect-resistant crops, but receive concerns on biosafety risks. Alternatively, crop wild species are important genetic resource in crop breeding to produce trait-specific varieties. Here, we investigated the molecular mechanisms of plant response to herbivory in wild, Bt-transgenic and cultivated rice, and found crop domestication weakened the response of plants to herbivory. The insertion of foreign Bt gene may promote the expression of other genes. In addition, our results showed growing environment plays an important role in regulating gene networks of plant response to herbivory. These results highlight the importance of wild species conservation, with the strategy of in situ conservation.
Collapse
Affiliation(s)
- Yongbo Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Weiqing Wang
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, CAS, Beijing 100093, China
| | - Yonghua Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Fang Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Weijuan Han
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Junsheng Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| |
Collapse
|
22
|
Padilla CS, Damaj MB, Yang ZN, Molina J, Berquist BR, White EL, Solís-Gracia N, Da Silva J, Mandadi KK. High-Level Production of Recombinant Snowdrop Lectin in Sugarcane and Energy Cane. Front Bioeng Biotechnol 2020; 8:977. [PMID: 33015000 PMCID: PMC7461980 DOI: 10.3389/fbioe.2020.00977] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 07/27/2020] [Indexed: 01/11/2023] Open
Abstract
Sugarcane and energy cane (Saccharum spp. hybrids) are ideal for plant-based production of recombinant proteins because their high resource-use efficiency, rapid growth and efficient photosynthesis enable extensive biomass production and protein accumulation at a cost-effective scale. Here, we aimed to develop these species as efficient platforms to produce recombinant Galanthus nivalis L. (snowdrop) agglutinin (GNA), a monocot-bulb mannose-specific lectin with potent antiviral, antifungal and antitumor activities. Initially, GNA levels of 0.04% and 0.3% total soluble protein (TSP) (0.3 and 3.8 mg kg–1 tissue) were recovered from the culms and leaves, respectively, of sugarcane lines expressing recombinant GNA under the control of the constitutive maize ubiquitin 1 (Ubi) promoter. Co-expression of recombinant GNA from stacked multiple promoters (pUbi and culm-regulated promoters from sugarcane dirigent5-1 and Sugarcane bacilliform virus) on separate expression vectors increased GNA yields up to 42.3-fold (1.8% TSP or 12.7 mg kg–1 tissue) and 7.7-fold (2.3% TSP or 29.3 mg kg–1 tissue) in sugarcane and energy cane lines, respectively. Moreover, inducing promoter activity in the leaves of GNA transgenic lines with stress-regulated hormones increased GNA accumulation to 2.7% TSP (37.2 mg kg–1 tissue). Purification by mannose-agarose affinity chromatography yielded a functional sugarcane recombinant GNA with binding substrate specificity similar to that of native snowdrop-bulb GNA, as shown by enzyme-linked lectin and mannose-binding inhibition assays. The size and molecular weight of recombinant GNA were identical to those of native GNA, as determined by size-exclusion chromatography and MALDI-TOF mass spectrometry. This work demonstrates the feasibility of producing recombinant GNA at high levels in Saccharum species, with the long-term goal of using it as a broad-spectrum antiviral carrier molecule for hemopurifiers and in related therapeutic applications.
Collapse
Affiliation(s)
- Carmen S Padilla
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, United States
| | - Mona B Damaj
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, United States
| | - Zhong-Nan Yang
- Institute for Plant Gene Function, Department of Biology, Shanghai Normal University, Shanghai, China
| | - Joe Molina
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, United States
| | | | - Earl L White
- MDx BioAnalytical Laboratory, Inc., College Station, TX, United States
| | - Nora Solís-Gracia
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, United States
| | - Jorge Da Silva
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, United States.,Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, United States
| | - Kranthi K Mandadi
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, United States.,Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, United States
| |
Collapse
|
23
|
Dastan S, Ghareyazie B, Teixeira da Silva JA. Selection of ideotype to increase yield potential of GM and non-GM rice cultivars. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 297:110519. [PMID: 32563458 DOI: 10.1016/j.plantsci.2020.110519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 04/03/2020] [Accepted: 05/03/2020] [Indexed: 05/28/2023]
Abstract
Using classical breeding, plant breeders envision a plant type whose yield they aim to enhance by selecting for individual traits to create model/ideal plants or ideotypes. To achieve this, those factors restricting yield need to be identified and controlled through the use of new technologies to achieve the desired ideotype. This study aimed to determine the ideotype of seven genetically modified (GM) and non-GM rice (Oryza sativa L.) cultivars. Field experiments were carried out in three isolated regions in the north of Iran under the Iranian bio-safety standard protocol. Four of the GM cultivars carried the cry1Ab gene in the vegetative stage while three non-GM cultivars served as the control. R2 values showed that five, six and seven variables in Sari, Amol and Rasht regions accounted for 63 %, 52 % and 74 % of paddy yield variation, respectively. In the same three regions, paddy yield variation due to white heads accounted for 28.38 %, 8.45 % and 3.95 % of the total variation in paddy yield, respectively. The total estimated variation in paddy yield in Sari, Amol and Rasht was 1810.50, 2377.6 and 2176.47 kg ha-1, respectively. Average data over the three regions indicated that highest loss in paddy yield was observed in non-GM 'Nemat', 'Khazar' and 'Tarom Hashemi'. GM cultivars derived from 'Khazar' showed significantly lower paddy yield loss than the non-GM parent. Dead heart, a condition that occurs in the vegetative stage in which the stem borer larva enters the stem and feeds on the growing shoot, causing the central shoot to dry, as well as white heads, which is a condition in which whole ear heads of adult plants become dry and yield chaffy grains, in all three regions were important variables contributing to paddy yield loss. In the future, producing GM rice resistant to striped stem borer with an active promoter in the reproductive growth stage might allow farmers to reduce a significant part of paddy yield loss resulting from white heads, which is directly negatively correlated with filled spikelets per panicle (R2 = -0.57**), in order to achieve an ideotype.
Collapse
Affiliation(s)
- Salman Dastan
- Department of Biosafety and Genetic Engineering, Agricultural Biotechnology Research Institute of Iran (ABRII), Karaj, Iran.
| | - Behzad Ghareyazie
- Department of Biosafety and Genetic Engineering, Agricultural Biotechnology Research Institute of Iran (ABRII), Karaj, Iran
| | | |
Collapse
|
24
|
Wang W, Cai W, Wang Z, Zhao J, Hua H. A new method for evaluating the effects of insecticidal proteins expressed by transgenic plants on ectoparasitoid of target pest. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:29983-29992. [PMID: 32447725 DOI: 10.1007/s11356-020-08664-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Transgenic Bt insect-resistant plants are highly resistant to Lepidoptera stockpile pest Indian meal moth, Plodia interpunctella Hübner (Lepidoptera: Pyralidae), a storage pest. Habrobracon hebetor (Say) (Hymenoptera: Braconidae), which is an ectoparasitic wasp of Indian meal moth, may be exposed to the Bt protein through the food chain. In the current study, high dose of Cry1C protein was injected into the hemolymph of P. interpunctella by microinjection, and the hemolymph was used as the carrier to deliver Bt protein to the H. hebetor. Using this method, we developed a new Tier-1 risk assessment system for ectoparasitoid, successfully avoided "host/prey quality-mediated effect," and improve the accuracy of safety evaluation. Results showed that injected Cry1C was stable and bioactive in the hemolymph of P. interpunctella parasitized by H. hebetor, and high dose of Cry1C has no negative impacts on egg hatching rate, developmental duration from egg to adult, survival egg to adult, pupa weight, adults weight (male and female), adult longevity and reproduction, and activity of stress-related enzymes of H. hebetor. However, the hemolymph of P. interpunctella injected into Galanthus nivalis L. agglutinin (the positive control) had significant negative impact on these biological parameters of H. hebetor. The results indicate that H. hebetor are not sensitive to Cry1C protein at the tested concentration and there were no detrimental effects of Cry1C protein on any biological parameters tested in the present study. More importantly, we constructed a new efficient and simple system for the biosafety assessment on the larvae of ectoparasitoid of target pest.
Collapse
Affiliation(s)
- Wenjun Wang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Wanlun Cai
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhengjie Wang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jing Zhao
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Hongxia Hua
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| |
Collapse
|
25
|
Zhou H, Hu W, Huang Q, Abouzaid M, Jin H, Sun Y, Qiu L, Zhang W, Lin Y, Ma W. Knockdown of cadherin genes decreases susceptibility of Chilo suppressalis larvae to Bacillus thuringiensis produced Crystal toxins. INSECT MOLECULAR BIOLOGY 2020; 29:301-308. [PMID: 31908051 DOI: 10.1111/imb.12634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 12/24/2019] [Accepted: 12/31/2019] [Indexed: 06/10/2023]
Abstract
The striped rice stem borer, Chilo suppressalis Walker, is one of the most destructive rice pests in Asia. Insecticidal crystal proteins (Cry toxins) produced by Bacillus thuringiensis are widely used as biopesticides or in developing transgenic crops for pest management. In this study, we tested the involvement of two newly cloned C. suppressalis cadherins (CsCAD3 and CsCAD4) in the toxicity of Cry1Ab/Ac, Cry2Aa and Cry1Ca. Our results showed that CsCAD4 was expressed highest in the midgut, whereas CsCAD3 was expressed highest in the epidermis. The feeding of double-stranded RNA specific to CsCAD3 and CsCAD4 respectively significantly suppressed the expressions of target gene. The knockdown of CsCAD3 significantly reduced the mortality of larvae to Cry1Ab/Ac, whereas knockdown of CsCAD4 significantly decreased the larval susceptibility to Cry2Aa. In contrast, reduced expressions of CsCAD3 or CsCAD4 were not interacted with larval susceptibility to Cry1Ca. Our results suggest that CsCAD3 and CsCAD4 function in Cry toxin toxicity and these findings will help us to better understand the action mechanism of Cry toxins in C. suppressalis.
Collapse
Affiliation(s)
- H Zhou
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - W Hu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Q Huang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - M Abouzaid
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - H Jin
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Y Sun
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - L Qiu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - W Zhang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
| | - Y Lin
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
| | - W Ma
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| |
Collapse
|
26
|
Wang Z, Cai W, Wang W, Zhao J, Li Y, Zou Y, Elgizawy KK, Hua H. Assessing the effects of Cry2Aa protein on Habrobracon hebetor (Hymenoptera: Braconidae), a parasitoid of Indian meal moth, Plodia interpunctella (lepidoptera: Pyralidae). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 194:110380. [PMID: 32145528 DOI: 10.1016/j.ecoenv.2020.110380] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 02/24/2020] [Accepted: 02/25/2020] [Indexed: 06/10/2023]
Abstract
Transgenic crops express Cry proteins exhibit high resistant to target insect pests. When we evaluate the effects of Cry proteins on the parasitoid of target insect pest via tritrophic experiments (transgenic plant-target insect pest-parasitoid) host quality of parasitoids might decrease because of insecticidal protein ingestion, this would cause host-quality mediated effects and influence the accuracy of biosafety assessment. In the current study, high dose of Cry2Aa protein was injected into the hemolymph of Plodia interpunctella by microinjection, and the hemolymph was used as the carrier to deliver Cry protein to Habrobracon hebetor, which has been previously reported as an ectoparasitoid of P. interpunctella larval, in order to avoid the "host-quality mediated effects". Results showed that injected Cry2Aa remained at high concentration and bioactive in the hemolymph of P. interpunctella parasitized by H. hebetor, the hemolymph of P. interpunctella could be used as carriers of Cry protein to H. hebetor, and high dose of Cry2Aa have no negative impacts on the development time, weight of pupa, sex ratio, adults weight (male and female), adult longevity and fecundity, and the activity of stress-related enzymes of H. hebetor. However, the hemolymph of P. interpunctella injected into Galanthus nivalis agglutinin (the positive control) showed significant negative impact on these parameters measured in the present study of H. hebetor. This indicated that Cry2Aa protein had no detrimental effects on the biological parameters of H. hebetor measured in the current study. Meanwhile, this study provides a new method for the safety evaluation of the ectoparasitoids of target pest and might be expanded to the other species of ectoparasitoids of target insects of Cry proteins in biosafety risk assessment.
Collapse
Affiliation(s)
- Zhengjie Wang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Wanlun Cai
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Wenjun Wang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Jing Zhao
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Yifeng Li
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Yulan Zou
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Karam Khamis Elgizawy
- Plant Protection Department, Faculty of Agriculture, Benha University, Moshtohor, Toukh, 13736, Egypt.
| | - Hongxia Hua
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| |
Collapse
|
27
|
Ramkumar N, Rathinam M, Singh S, Kesiraju K, Muniyandi V, Singh NK, Dash PK, Sreevathsa R. Assessment of Pigeonpea (Cajanus cajan L.) transgenics expressing Bt ICPs, Cry2Aa and Cry1AcF under nethouse containment implicated an effective control against herbivory by Helicoverpa armigera (Hübner). PEST MANAGEMENT SCIENCE 2020; 76:1902-1911. [PMID: 31840900 DOI: 10.1002/ps.5722] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 11/07/2019] [Accepted: 12/12/2019] [Indexed: 05/23/2023]
Abstract
BACKGROUND Pigeonpea is a source of quality proteins and the main constituent of a well-balanced diet for majority of Indian population. One of the major constraints in the production of pigeonpea is a polyphagous insect pest, Helicoverpa armigera. Non-availability of resistant sources in the germplasm and limitations in conventional breeding have been key factors for continued yield losses. Additionally, hazards of chemical fertilizers on the environment have prompted the scientific community to develop alternative strategies. Bacillus thuringiensis (Bt) insecticidal proteins (ICPs) have emerged as the most reliable source for the control of insect pests through transgenics. RESULTS Transgenic pigeonpea plants harboring validated Bt ICPs, Cry2Aa and Cry1AcF were developed by a non-tissue culture based in planta transformation strategy and assessed for integration of Transfer-DNA (T-DNA) and efficacy against pod borer under in vitro conditions. For the first time this study demonstrates the successful evaluation of 19 transgenic pigeonpea events (11 with cry2Aa and 8 with cry1AcF) under soil and pot conditions in a nethouse containment. The stability in the performance was assessed stringently by deliberate H. armigera larval challenging. The trial identified ten promising events of both the genes that portrayed reduced damage to the herbivore. CONCLUSION We present the first ever successful evaluation of pigeonpea transgenics with the ability to mitigate pod borer under nethouse conditions. The transgenics depicted molecular evidence for the stability of T-DNA integration, consistency in the expression of Cry proteins and resistance against H. armigera. These events can form a pool of useful transgenics to manage the devastating pod borer. © 2019 Society of Chemical Industry.
Collapse
Affiliation(s)
- Nikhil Ramkumar
- ICAR - National Institute for Plant Biotechnology, New Delhi, India
| | - Maniraj Rathinam
- ICAR - National Institute for Plant Biotechnology, New Delhi, India
| | - Shweta Singh
- ICAR - National Institute for Plant Biotechnology, New Delhi, India
| | - Karthik Kesiraju
- ICAR - National Institute for Plant Biotechnology, New Delhi, India
| | | | | | - Prasanta K Dash
- ICAR - National Institute for Plant Biotechnology, New Delhi, India
| | | |
Collapse
|
28
|
Mohd Hanafiah N, Mispan MS, Lim PE, Baisakh N, Cheng A. The 21st Century Agriculture: When Rice Research Draws Attention to Climate Variability and How Weedy Rice and Underutilized Grains Come in Handy. PLANTS (BASEL, SWITZERLAND) 2020; 9:E365. [PMID: 32188108 PMCID: PMC7154822 DOI: 10.3390/plants9030365] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/10/2020] [Accepted: 03/13/2020] [Indexed: 12/11/2022]
Abstract
Rice, the first crop to be fully sequenced and annotated in the mid-2000s, is an excellent model species for crop research due mainly to its relatively small genome and rich genetic diversity. The 130-million-year-old cereal came into the limelight in the 1960s when the semi-dwarfing gene sd-1, better known as the "green revolution" gene, resulted in the establishment of a high-yielding semi-dwarf variety IR8. Deemed as the miracle rice, IR8 saved millions of lives and revolutionized irrigated rice farming particularly in the tropics. The technology, however, spurred some unintended negative consequences, especially in prompting ubiquitous monoculture systems that increase agricultural vulnerability to extreme weather events and climate variability. One feasible way to incorporate resilience in modern rice varieties with narrow genetic backgrounds is by introgressing alleles from the germplasm of its weedy and wild relatives, or perhaps from the suitable underutilized species that harbor novel genes responsive to various biotic and abiotic stresses. This review reminisces the fascinating half-century journey of rice research and highlights the potential utilization of weedy rice and underutilized grains in modern breeding programs. Other possible alternatives to improve the sustainability of crop production systems in a changing climate are also discussed.
Collapse
Affiliation(s)
- Noraikim Mohd Hanafiah
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Muhamad Shakirin Mispan
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
- The Centre for Research in Biotechnology for Agriculture, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - Phaik Eem Lim
- Institute of Ocean and Earth Science, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - Niranjan Baisakh
- School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Acga Cheng
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| |
Collapse
|
29
|
Yi DX, Fang ZY, Yang LM. Inheritance and expression of Bt cry1Ba3 gene in progeny from transformed cabbage plants. Mol Biol Rep 2020; 47:2583-2589. [PMID: 32124170 DOI: 10.1007/s11033-020-05344-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 02/22/2020] [Indexed: 11/28/2022]
Abstract
Stable inheritance and expression of transgene are important parameters for successful use of a transgenic crop. We previously transformed a Bt cry1Ba3 gene into cabbage inbred line CA21-3. To evaluate the stability of our Bt cabbage lineages, transgene inheritance and expression were examined in four successive generations under greenhouse conditions. In our study, T1, T2 and T3 progenies of the three independent transgenic lineages (YA-1, YA-2 and YA-3) were generated and then the inheritance and expression of cry1Ba3 were analyzed in sexually derived progeny. Segregation ratio of 2.81:1, 3.27:1 and 3.07:1 was found in T1 progeny of lineages YA-1, YA-2 and YA-3, respectively. Chi-square analysis indicated that these segregation ratios of corresponding population fit the 3:1 ratio. Segregation ratios of the transgene in T2 progeny showed either 3:1 or all expression of cry1Ba3. These data suggest that cry1Ba3 in CA21-3 can be inherited in a Mendelian manner. ELISA analysis of transgenic plants from four generations demonstrated that cry1Ba3 had been stably transmitted to the T3 progeny. Additionally, under artificial infestation conditions, the homozygous T3-YA-1-2-1 line exhibited excellent resistance to Plutella xylostella as compared with un-transformed CA21-3. All these results imply that the three cabbage lineages are genetically stable and can be used to inhibit damage on cabbage caused by P. xylostella.
Collapse
Affiliation(s)
- Deng-Xia Yi
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
| | - Zhi-Yuan Fang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Li-Mei Yang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| |
Collapse
|
30
|
Yang B, Chen Q, Liu X, Chen F, Liang Y, Qiang W, He L, Ge F. Effects of Pest Management Practices on Soil Nematode Abundance, Diversity, Metabolic Footprint and Community Composition Under Paddy Rice Fields. FRONTIERS IN PLANT SCIENCE 2020; 11:88. [PMID: 32140164 PMCID: PMC7042464 DOI: 10.3389/fpls.2020.00088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
The wide-scale adoption of transgenic crops has aroused public concern towards potential impacts to the ecological services of soil fauna, such as soil nematodes. However, few studies has examined whether the cultivation of transgenic rice would pose greater threats to soil nematode community and associated ecological functions than insecticides application. Moreover, what are determinants of soil nematode community in paddy fields remains unclear. During a 3-year field study, rhizosphere soil samples of transgenic-Bt rice, its counterpart non-Bt parental rice and not-Bt rice with insecticides application were taken at four times in the rice developmental cycle using a random block design with three replications for each treatment. We hypothesized that the effects of pest management practice on soil nematode abundance and metabolic footprint change with trophic group and sampling time. We also predicted there were significant differences in structure and composition of soil nematode community across the three treatments examined and sampling times. In agreement with our expectation, the effects of pest management practice on nematode abundance and metabolic footprints depend on trophic group and sampling time. However, pest management practice exerted no apparent effect on nematode diversity and community composition. Soil nutrient availability and C:N molar ratio are the primary regulating factor of soil nematode community in rice paddy fields. In conclusion, our findings implied that changes in abundance, diversity, metabolic footprints associated with the crop growth stage overweighed the application of Bt rice and insecticides. The cultivation of Bt rice Huahui-1 exerted no measurable adverse effect on soil nematode community in rhizosphere soil over 3 years of rice cropping.
Collapse
Affiliation(s)
- Bing Yang
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration, Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
| | - Qunying Chen
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Xianghui Liu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Fajun Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Yuyong Liang
- Institute of Plant Protection, Jiangxi Academy of Agricultural Sciences, Nanchang, China
| | - Wei Qiang
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration, Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Lulu He
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration, Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Feng Ge
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
31
|
Xiao Y, Wu K. Recent progress on the interaction between insects and Bacillus thuringiensis crops. Philos Trans R Soc Lond B Biol Sci 2020; 374:20180316. [PMID: 30967027 PMCID: PMC6367150 DOI: 10.1098/rstb.2018.0316] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Extensive use of chemical pesticides poses a great threat to the environment and food safety. The discovery of Bacillus thuringiensis (Bt) toxins with effective insecticidal activity against pests and the development of transgenic technology of plants opened a new era of pest control. Transgenic Bt crops, including maize, cotton and soya bean, have now been produced and commercialized to protect against about 30 major coleopteran and lepidopteran pests, greatly benefiting the environment and the economy. However, with the long-term cultivation of Bt crops, some target pests have gradually developed resistance. Numerous studies have indicated that mutations in genes for toxins activation, toxin-binding and insect immunization are important sources in Bt resistance. An in-depth exploration of the corresponding Bt-resistance mechanisms will aid in the design of new strategies to prevent and control pests. Future research will focus on Bt crops expressing new genes and multiple genes to control a broader range of pests as part of an integrated pest management programme. This article is part of the theme issue ‘Biotic signalling sheds light on smart pest management’.
Collapse
Affiliation(s)
- Yutao Xiao
- 1 Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences , Shenzhen 518120 , People's Republic of China
| | - Kongming Wu
- 2 The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , West Yuanmingyuan Road, Beijing 100193 , People's Republic of China
| |
Collapse
|
32
|
Cui Y, Li R, Li G, Zhang F, Zhu T, Zhang Q, Ali J, Li Z, Xu S. Hybrid breeding of rice via genomic selection. PLANT BIOTECHNOLOGY JOURNAL 2020; 18:57-67. [PMID: 31124256 PMCID: PMC6920338 DOI: 10.1111/pbi.13170] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 04/27/2019] [Accepted: 05/12/2019] [Indexed: 05/04/2023]
Abstract
Hybrid breeding is the main strategy for improving productivity in many crops, especially in rice and maize. Genomic hybrid breeding is a technology that uses whole-genome markers to predict future hybrids. Predicted superior hybrids are then field evaluated and released as new hybrid cultivars after their superior performances are confirmed. This will increase the opportunity of selecting true superior hybrids with minimum costs. Here, we used genomic best linear unbiased prediction to perform hybrid performance prediction using an existing rice population of 1495 hybrids. Replicated 10-fold cross-validations showed that the prediction abilities on ten agronomic traits ranged from 0.35 to 0.92. Using the 1495 rice hybrids as a training sample, we predicted six agronomic traits of 100 hybrids derived from half diallel crosses involving 21 parents that are different from the parents of the hybrids in the training sample. The prediction abilities were relatively high, varying from 0.54 (yield) to 0.92 (grain length). We concluded that the current population of 1495 hybrids can be used to predict hybrids from seemingly unrelated parents. Eventually, we used this training population to predict all potential hybrids of cytoplasm male sterile lines from 3000 rice varieties from the 3K Rice Genome Project. Using a breeding index combining 10 traits, we identified the top and bottom 200 predicted hybrids. SNP genotypes of the training population and parameters estimated from this training population are available for general uses and further validation in genomic hybrid prediction of all potential hybrids generated from all varieties of rice.
Collapse
Affiliation(s)
- Yanru Cui
- Hebei Agricultural UniversityBaodingChina
- Department of Botany and Plant SciencesUniversity of CaliforniaRiversideCAUSA
| | - Ruidong Li
- Department of Botany and Plant SciencesUniversity of CaliforniaRiversideCAUSA
| | - Guangwei Li
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research (Wuhan)Huazhong Agricultural UniversityWuhanChina
| | - Fan Zhang
- Institute of Crop Science/National Key Facility for Crop Gene Resource and Genetic ImprovementChinese Academy of Agricultural SciencesBeijingChina
| | - Tiantian Zhu
- Department of Botany and Plant SciencesUniversity of CaliforniaRiversideCAUSA
| | - Qifa Zhang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research (Wuhan)Huazhong Agricultural UniversityWuhanChina
| | - Jauhar Ali
- International Rice Research InstituteMetro ManilaPhilippines
| | - Zhikang Li
- Institute of Crop Science/National Key Facility for Crop Gene Resource and Genetic ImprovementChinese Academy of Agricultural SciencesBeijingChina
- Anhui Agricultural UniversityHefeiChina
| | - Shizhong Xu
- Department of Botany and Plant SciencesUniversity of CaliforniaRiversideCAUSA
| |
Collapse
|
33
|
Sun Y, Yang P, Jin H, Liu H, Zhou H, Qiu L, Lin Y, Ma W. Knockdown of the aminopeptidase N genes decreases susceptibility of Chilo suppressalis larvae to Cry1Ab/Cry1Ac and Cry1Ca. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 162:36-42. [PMID: 31836052 DOI: 10.1016/j.pestbp.2019.08.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 07/09/2019] [Accepted: 08/15/2019] [Indexed: 06/10/2023]
Abstract
Bacillus thuringiensis (Bt) insecticide is currently the most widely used bioinsecticide. Bt expressing cry genes are some of the most successful foreign-genome-inserting genes used in transgenic insect-resistant crop development. Cry toxins are resistant to lepidopteran pests, such as Chilo suppressalis, a major insect pest of rice worldwide. Since Cry toxins exert their activity by binding to specific receptors in the midgut of target insects, identification of functional Cry toxin receptors in the midgut of C. suppressalis larvae is crucial to evaluate potential resistance mechanisms and develop effective strategies for inhibiting insect resistance. In this study, we isolated two aminopeptidase N genes (APN6 and APN8) from C. suppressalis and determined that they were expressed in the foregut. APN6 was highly expressed at the fourth instar, and APN8 was highly expressed in adult and pupa. Knockdown of CsAPN6 and CsAPN8 by RNA interference resulted in significantly decreased susceptibility of larvae to Bt rice varieties TT51 (expressing cry1Ac/cry1Ab fusion genes) and T1C-19 (expressing cry1Ca), but not T2A-1 (expressing cry2Aa). These findings suggest that both APN6 and APN8 are involved in the toxicity of Cry1Ac/Cry1Ab and Cry1Ca toxins.
Collapse
Affiliation(s)
- Yajie Sun
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan 430070, Hubei, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Pan Yang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan 430070, Hubei, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Huihui Jin
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan 430070, Hubei, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Hui Liu
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan 430070, Hubei, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Hao Zhou
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan 430070, Hubei, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Lin Qiu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant Protection, Hunan Agricultural University, Changsha 410128, China
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan 430070, Hubei, China
| | - Weihua Ma
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan 430070, Hubei, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China.
| |
Collapse
|
34
|
Pandey AK, Madhu P, Bhat BV. Down-Regulation of CYP79A1 Gene Through Antisense Approach Reduced the Cyanogenic Glycoside Dhurrin in [ Sorghum bicolor (L.) Moench] to Improve Fodder Quality. Front Nutr 2019; 6:122. [PMID: 31544105 PMCID: PMC6729101 DOI: 10.3389/fnut.2019.00122] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/24/2019] [Indexed: 11/13/2022] Open
Abstract
A major limitation for the utilization of sorghum forage is the production of the cyanogenic glycoside dhurrin in its leaves and stem that may cause the death of cattle feeding on it at the pre-flowering stage. Therefore, we attempted to develop transgenic sorghum plants with reduced levels of hydrogen cyanide (HCN) by antisense mediated down-regulation of the expression of cytochrome P450 CYP79A1, the key enzyme of the dhurrin biosynthesis pathway. CYP79A1 cDNA was isolated and cloned in antisense orientation, driven by rice Act1 promoter. Shoot meristem explants of sorghum cultivar CSV 15 were transformed by the particle bombardment method and 27 transgenics showing the integration of transgene were developed. The biochemical assay for HCN in the transgenic sorghum plants confirmed significantly reduced HCN levels in transgenic plants and their progenies. The HCN content in the transgenics varied from 5.1 to 149.8 μg/g compared to 192.08 μg/g in the non-transformed control on dry weight basis. Progenies with reduced HCN content were advanced after each generation till T3. In T3 generation, progenies of two promising events were tested which produced highly reduced levels of HCN (mean of 62.9 and 76.2 μg/g, against the control mean of 221.4 μg/g). The reduction in the HCN levels of transgenics confirmed the usefulness of this approach for reducing HCN levels in forage sorghum plants. The study effectively demonstrated that the antisense CYP79A1 gene deployment was effective in producing sorghum plants with lower HCN content which are safer for cattle to feed on.
Collapse
Affiliation(s)
- Arun K. Pandey
- ICAR-Indian Institute of Millets Research (IIMR), Hyderabad, India
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Pusuluri Madhu
- ICAR-Indian Institute of Millets Research (IIMR), Hyderabad, India
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | | |
Collapse
|
35
|
Deng J, Wang Y, Yang F, Liu Y, Liu B. Persistence of insecticidal Cry toxins in Bt rice residues under field conditions estimated by biological and immunological assays. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 679:45-51. [PMID: 31078774 DOI: 10.1016/j.scitotenv.2019.05.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 04/26/2019] [Accepted: 05/03/2019] [Indexed: 05/26/2023]
Abstract
One risk of growing Bacillus thuringiensis (Bt) crops is the potential nontarget effects which are likely related to the environmental behavior of crystal (Cry) toxins. Bt rice residues left in field after harvest constitute a main source of Cry toxins entering the environment. To our knowledge, very few studies have simultaneously evaluated the persistence of Cry toxins in Bt rice residues under field conditions using different methods. Here, we established a bioassay method with a target insect: the striped stem borer (SSB), Chilo suppressalis Walker. The reaction limit of the SSB to Cry toxins ranged from 5.4 to 12.7 ng g-1 in artificial diet, indicating that the detection limit of the bioassay ranged from 54 to 127 ng g-1 rice residues. A field decomposition experiment lasting for 210 d was conducted with the straw of two Bt rice lines transformed with either cry1Ab/1Ac or cry2A. Enzyme-linked immunosorbent assays (ELISAs) revealed that the Cry toxins in the Bt rice residues experienced rapid degradation to below 25% of the initial level in the first 42 d, and then decreased to below 100 ng g-1 rice residues within 100 to 140 d. Flooded conditions accelerated the degradation in the beginning compared with buried conditions. The Cry toxins were still detectable by ELISA, although at levels below 10 ng g-1 rice residues (<0.3% of the initial level) 210 d after harvest. However, the bioassay revealed that the SSB no longer had a significant reaction to Bt rice residues added into artificial diets 16 to 18 d after harvest under both conditions, which indicated that the level of bioactive Cry toxins had declined to below the detection limit. Our results suggest that ELISA overestimate the persistence of Cry toxins and that the potential risks mediated by Cry toxins may be much smaller than originally expected.
Collapse
Affiliation(s)
- Jiaxin Deng
- College of Plant Science and Technology, Huazhong Agricultural University, Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Wuhan 430070, Hubei, PR China
| | - Yongmo Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Wuhan 430070, Hubei, PR China.
| | - Fengying Yang
- College of Plant Science and Technology, Huazhong Agricultural University, Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Wuhan 430070, Hubei, PR China
| | - Yue Liu
- College of Plant Science and Technology, Huazhong Agricultural University, Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Wuhan 430070, Hubei, PR China
| | - Biao Liu
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of the People's Republic of China, Nanjing 210042, PR China
| |
Collapse
|
36
|
Liu L, Wu L, Knauth S, Eickhorst T. Degradation of transgenic Bt-rice straw incorporated with two different paddy soils. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 244:415-421. [PMID: 31132623 DOI: 10.1016/j.jenvman.2019.05.075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 05/15/2019] [Accepted: 05/19/2019] [Indexed: 06/09/2023]
Abstract
Transgenic Bt-rice is rice that has been genetically modified to produce insecticidal proteins (Cry1Ab/Ac) within the plant. Rice straw is incorporated into paddy soils after harvest for fertilization or to improve the soil structure. The incorporation of straw from transgenic Bt-rice may pose risks to the paddy soil system. The decomposition of Bt-rice straw and degradation of Cry1Ab/Ac proteins from the straw were investigated under laboratory conditions. In addition, effects of the incorporation with chopped rice straw on microbial communities in differently textured paddy soils were studied. The results indicated that the incorporation of straw from transgenic Bt-rice might have a slight influence on soil respiration and CH4 emissions in two paddy soils, i.e. the Silt Loam soil and the Silty Clay soil. Differences were also observed in the cumulative emissions of CO2 between the two amended paddy soils in addition to the well-known increase in emissions of both CO2 and CH4 due to straw incorporation. The Cry1Ab/Ac proteins from straw of transgenic Bt-rice were degraded in paddy soils. The rate of decline in the concentration of Cry1Ab/Ac proteins was different in the two soils. After 29 d of incubation, 61% and 42% of initial Cry1Ab/Ac proteins were detected in the silt loam and silty clay, respectively. As a result of the presence of the rice straw, the abundance of bacteria, archaea, and total cells were increased in two soils. The numbers of bacteria and total cells were 6.4% and 11.5% higher in the silt loam amended with straw of Bt-rice than non-Bt-rice, respectively. The silty clay displayed a similar trend as the silt loam.
Collapse
Affiliation(s)
- Ling Liu
- University of Bremen, Soil Microbial Ecology, Bremen, Germany
| | - Longhua Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Chinese Academy of Sciences, Institute of Soil Science, Nanjing, China
| | - Stefan Knauth
- University of Bremen, Soil Microbial Ecology, Bremen, Germany
| | - Thilo Eickhorst
- University of Bremen, Soil Microbial Ecology, Bremen, Germany.
| |
Collapse
|
37
|
Qiu L, Sun Y, Jiang Z, Yang P, Liu H, Zhou H, Wang X, Zhang W, Lin Y, Ma W. The midgut V-ATPase subunit A gene is associated with toxicity to crystal 2Aa and crystal 1Ca-expressing transgenic rice in Chilo suppressalis. INSECT MOLECULAR BIOLOGY 2019; 28:520-527. [PMID: 30719783 DOI: 10.1111/imb.12570] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Insecticidal crystal (Cry) proteins produced by the bacterium Bacillus thuringiensis (Bt) are toxic to a diverse range of insects. Transgenic rice expressing Cry1A, Cry2A and Cry1C toxins have been developed that are lethal to Chilo suppressalis, a devastating insect pest of rice in China. Identifying the mechanisms underlying the interactions of Cry toxins with susceptible hosts will improve both our understanding of Cry protein toxicology and long-term efficacy of Bt crops. In this study, we tested the hypothesis that V-ATPase subunit A contributes to the action of Cry1Ab/1Ac, Cry2Aa and Cry1Ca toxins in C. suppressalis. The full-length V-ATPase subunit A transcript was initially cloned from the C. suppressalis larval midgut and then used to generate double-stranded RNA (dsRNA)-producing bacteria. Toxicity assays using transgenic rice lines TT51 (Cry1Ab and Cry1Ac fusion genes), T2A-1 (Cry2Aa), and T1C-19 (Cry1Ca) in conjunction with V-ATPase subunit A dsRNA-treated C. suppressalis larvae revealed significantly reduced larval susceptibility to T2A-1 and T1C-19 transgenic rice, but not to TT51 rice. These results suggest that the V-ATPase subunit A plays a crucial role in mediating Cry2Aa and Cry1Ca toxicity in C. suppressalis. These findings will have significant implications on the development of future resistance management tools.
Collapse
Affiliation(s)
- L Qiu
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Y Sun
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Z Jiang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - P Yang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - H Liu
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - H Zhou
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - X Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - W Zhang
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
| | - Y Lin
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
| | - W Ma
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Wuhan, Hubei, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| |
Collapse
|
38
|
Pandey SP, Singh AP, Srivastava S, Chandrashekar K, Sane AP. A strong early acting wound-inducible promoter, RbPCD1pro, activates cryIAc expression within minutes of wounding to impart efficient protection against insects. PLANT BIOTECHNOLOGY JOURNAL 2019; 17:1458-1470. [PMID: 30623549 PMCID: PMC6576099 DOI: 10.1111/pbi.13071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 12/12/2018] [Indexed: 06/09/2023]
Abstract
The expression of insecticidal proteins under constitutive promoters in transgenic plants is fraught with problems like developmental abnormalities, yield drag, expression in unwanted tissues, and seasonal changes in expression. RbPCD1pro, a rapid, early acting wound-inducible promoter from rose that is activated within 5 min of wounding, was isolated and characterized. Wounding increased transcript levels up to 150 and 500 folds within 5 and 20 min coupled with high translation as seen by histochemical GUS enzyme activity within 5-20 min. RbPCD1pro was activated by both sucking and chewing insects and showed wound-inducible expression in various aerial tissues of plants representing commercially important dicot and monocot families. The promoter showed no expression in any vegetative tissue except upon wounding. Functionality of RbPCD1pro was tested by its ability to drive expression of the insecticidal protein gene cryIAc in transgenic Arabidopsis and tomato. Strong wound-inducible CryIAc expression was observed in both plants that increased 100-350 fold (Arabidopsis) and 280-600 fold (tomato) over the unwounded background within 5 min and over 1000-1600 fold within 20 min. The unwounded background level was just 3-6% of the CaMV35S promoter while wound-induced expression was 5-27 folds higher than the best CaMV35S line in just 5 min and 80-fold higher in 20 min. Transgenic plants showed strong resistance even to larger fourth instar larvae of H. armigera and no abnormalities in development and general plant growth. This is one of the earliest acting promoters with wide biotechnological application across monocot and dicot plants.
Collapse
Affiliation(s)
- Saurabh Prakash Pandey
- Plant Gene Expression LabCSIR‐National Botanical Research InstituteLucknowIndia
- Academy of Scientific and Innovative Research (AcSIR)GhaziabadIndia
| | - Amar Pal Singh
- Plant Gene Expression LabCSIR‐National Botanical Research InstituteLucknowIndia
- Present address:
National Institute for Plant Genome ResearchNew Delhi110067India
| | - Shruti Srivastava
- Plant Gene Expression LabCSIR‐National Botanical Research InstituteLucknowIndia
| | - Krishnappa Chandrashekar
- Genomics and Molecular Biology DivisionCSIR‐National Botanical Research InstituteLucknowIndia
- Present address:
IARI Regional CentreAundh, Pune411067India
| | - Aniruddha P. Sane
- Plant Gene Expression LabCSIR‐National Botanical Research InstituteLucknowIndia
- Academy of Scientific and Innovative Research (AcSIR)GhaziabadIndia
| |
Collapse
|
39
|
VanWallendael A, Soltani A, Emery NC, Peixoto MM, Olsen J, Lowry DB. A Molecular View of Plant Local Adaptation: Incorporating Stress-Response Networks. ANNUAL REVIEW OF PLANT BIOLOGY 2019; 70:559-583. [PMID: 30786237 DOI: 10.1146/annurev-arplant-050718-100114] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Ecological specialization in plants occurs primarily through local adaptation to different environments. Local adaptation is widely thought to result in costly fitness trade-offs that result in maladaptation to alternative environments. However, recent studies suggest that such trade-offs are not universal. Further, there is currently a limited understanding of the molecular mechanisms responsible for fitness trade-offs associated with adaptation. Here, we review the literature on stress responses in plants to identify potential mechanisms underlying local adaptation and ecological specialization. We focus on drought, high and low temperature, flooding, herbivore, and pathogen stresses. We then synthesize our findings with recent advances in the local adaptation and plant molecular biology literature. In the process, we identify mechanisms that could cause fitness trade-offs and outline scenarios where trade-offs are not a necessary consequence of adaptation. Future studies should aim to explicitly integrate molecular mechanisms into studies of local adaptation.
Collapse
Affiliation(s)
- Acer VanWallendael
- Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824, USA;
- Plant Resilience Institute, Michigan State University, East Lansing, Michigan 48824, USA
- Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, Michigan 48824, USA
| | - Ali Soltani
- Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824, USA;
- Plant Resilience Institute, Michigan State University, East Lansing, Michigan 48824, USA
| | - Nathan C Emery
- Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824, USA;
| | - Murilo M Peixoto
- Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824, USA;
- Plant Resilience Institute, Michigan State University, East Lansing, Michigan 48824, USA
- Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, Michigan 48824, USA
| | - Jason Olsen
- Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824, USA;
- Ecology, Evolutionary Biology, and Behavior Program, Michigan State University, East Lansing, Michigan 48824, USA
| | - David B Lowry
- Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824, USA;
- Plant Resilience Institute, Michigan State University, East Lansing, Michigan 48824, USA
- Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, Michigan 48824, USA
- Ecology, Evolutionary Biology, and Behavior Program, Michigan State University, East Lansing, Michigan 48824, USA
| |
Collapse
|
40
|
Fu W, Wang C, Xu W, Zhu P, Lu Y, Wei S, Wu X, Wu Y, Zhao Y, Zhu S. Unintended effects of transgenic rice revealed by transcriptome and metabolism. GM CROPS & FOOD 2019; 10:20-34. [PMID: 30955410 DOI: 10.1080/21645698.2019.1598215] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Genetically modified (GM) organisms have been developed for decades. However, unintended effects are the main concerns of safety assessment that needs to be carefully investigated. Here, eight varieties of GM rice that were developed in China were selected to assess the unintended effects through transcriptome and metabolism. There are 2892-8758 differentially expressed genes (DEGs) and 7-50 metabolites at significant level between GM varieties and their isogenic counterparts, which were far fewer than that between traditional rice varieties. The function enrichment analysis showed altered transcription in stress-related pathway and starch and sucrose metabolism. DEGs shared among eight GM samples constitute less than 1% of the genes in the genome, and none of them is reported more than four times. The insertion effect on the nearby gene expression and the associated metabolism is only restricted to 50 genes. All the results provide a comprehensive analysis of unintended effects and indication of difference in Chinese transgenic rice based on their backgrounds, transformation, and insertion elements.
Collapse
Affiliation(s)
- Wei Fu
- a Chinese Academy of Inspection and Quarantine , Beijing , China
| | - Chenguang Wang
- a Chinese Academy of Inspection and Quarantine , Beijing , China.,b Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences , China Agricultural University , Beijing , China.,c College of Plant Protection , China Agricultural University , Beijing , China
| | - Wenjie Xu
- a Chinese Academy of Inspection and Quarantine , Beijing , China.,b Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences , China Agricultural University , Beijing , China.,c College of Plant Protection , China Agricultural University , Beijing , China
| | - Pengyu Zhu
- a Chinese Academy of Inspection and Quarantine , Beijing , China
| | - Yun Lu
- a Chinese Academy of Inspection and Quarantine , Beijing , China
| | - Shuang Wei
- d Guangdong Entry-Exit Inspection and Quarantine Bureau , Guangzhou , China
| | - Xiyang Wu
- e Department of Food Science and Engineering , Jinan University , Guangzhou , China
| | - Yuping Wu
- a Chinese Academy of Inspection and Quarantine , Beijing , China
| | - Yiqiang Zhao
- b Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences , China Agricultural University , Beijing , China
| | - Shuifang Zhu
- a Chinese Academy of Inspection and Quarantine , Beijing , China.,c College of Plant Protection , China Agricultural University , Beijing , China
| |
Collapse
|
41
|
Wang X, Tang T, Miao Q, Xie S, Chen X, Tang J, Peng C, Xu X, Wei W, You Z, Xu J. Detection of transgenic rice line TT51-1 in processed foods using conventional PCR, real-time PCR, and droplet digital PCR. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.11.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
42
|
Ling L, Li X, Wang K, Cai M, Jiang Y, Cao C. Carbon and nitrogen partitioning of transgenic rice T2A-1 (Cry2A*) with different nitrogen treatments. Sci Rep 2019; 9:5351. [PMID: 30926826 PMCID: PMC6440951 DOI: 10.1038/s41598-019-41267-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 12/31/2018] [Indexed: 12/05/2022] Open
Abstract
Nitrogen (N) and carbon(C) metabolisms in plants were investigated to assess different responses of Bt and non-Bt rice to different N treatments. T2A-1 (Bt rice variety) inserted with Cry2A* protein to resist Lepidoptera and its parental line MH63 was adopted in this study. The total N accumulation presented no statistical difference. But nitrogen contents in different parts of rice plant were significantly different between the two lines, especially on leaf and spike part. This study revealed that the nitrogen in leaf of T2A-1 was far more than that of MH63; however, the nitrogen in spike of T2A-1 was less than that of MH63. In addition, MH63 assimilated more carbon than T2A-1. However, the distribution proportion of carbon in leaf, stem and spike of T2A-1 and MH63 were both 1:1:1. What’s more, our study of the difference in metabolism pathway based on proteomics analysis provided more insights on the responses of two lines of Bt and non-Bt rice to different N treatments. And amino acid metabolism, energy metabolism, and carbohydrate metabolism presented significant difference between two lines. In addition, the number of differentially expressed proteins with N deficiency treatment was almost twice as many as that with normal N treatment. It could be inferred that the insertion of Cry2A* in T2A-1 may bring about effects on carbon and nitrogen allocation and related metabolisms, especially under N deficiency environment.
Collapse
Affiliation(s)
- Lin Ling
- Ministry of Agriculture Key Laboratory of Crop Physiology, Ecology and Cultivation (The Middle Reaches of Yangtze River), Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Xuexue Li
- Ministry of Agriculture Key Laboratory of Crop Physiology, Ecology and Cultivation (The Middle Reaches of Yangtze River), Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Kangxu Wang
- Ministry of Agriculture Key Laboratory of Crop Physiology, Ecology and Cultivation (The Middle Reaches of Yangtze River), Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Mingli Cai
- Ministry of Agriculture Key Laboratory of Crop Physiology, Ecology and Cultivation (The Middle Reaches of Yangtze River), Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Yang Jiang
- Ministry of Agriculture Key Laboratory of Crop Physiology, Ecology and Cultivation (The Middle Reaches of Yangtze River), Huazhong Agricultural University, Wuhan, 430070, P. R. China.
| | - Cougui Cao
- Ministry of Agriculture Key Laboratory of Crop Physiology, Ecology and Cultivation (The Middle Reaches of Yangtze River), Huazhong Agricultural University, Wuhan, 430070, P. R. China.
| |
Collapse
|
43
|
Expression of
cry
genes in
Bacillus thuringiensis
biotechnology. Appl Microbiol Biotechnol 2019; 103:1617-1626. [DOI: 10.1007/s00253-018-9552-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 01/03/2023]
|
44
|
Bacillus thuringiensis-Based Gene Pyramiding: a Way Forward for a Combined Horizontal and Vertical Resistance in Plant. BACILLI IN CLIMATE RESILIENT AGRICULTURE AND BIOPROSPECTING 2019. [DOI: 10.1007/978-3-030-15175-1_15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
45
|
Xu C, Cheng J, Lin H, Lin C, Gao J, Shen Z. Characterization of transgenic rice expressing fusion protein Cry1Ab/Vip3A for insect resistance. Sci Rep 2018; 8:15788. [PMID: 30361672 PMCID: PMC6202352 DOI: 10.1038/s41598-018-34104-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 09/13/2018] [Indexed: 01/16/2023] Open
Abstract
Management of resistance development of insect pests is of great importance for continued utilization of Bt crop. The high-dose/refuge and pyramid (gene stacking) strategy are commonly employed to delay the evolution of insect resistance. Due to the anticipated difficulty for deployment of mandatory refuge for transgenic crops in China, where the size of farmer is quite small, stacking of genes with different modes of action is a more feasible strategy. Here we report the development of transgenic rice expressing a fusion protein of Cry1Ab and Vip3A toxin. Analysis of trypsin proteolysis suggested that the fusion protein is equivalent to the combination of Cry1Ab and Vip3A protein. The transgenic plants expressing the fusion protein were found to be highly resistant to two major rice pests, Asiatic rice borer Chilo suppressalis (Lepidoptera: Crambidae) and rice leaf folder Cnaphalocrocis medinalis (Lepidoptera: Crambidae), while their agronomic performances showed no significant difference compared to the non-transgenic recipient rice. Therefore, the transgenic rice may be utilized for rice pest control in China.
Collapse
Affiliation(s)
- Chao Xu
- State Key Laboratory of Rice Biology, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jiahui Cheng
- State Key Laboratory of Rice Biology, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Haiyan Lin
- State Key Laboratory of Rice Biology, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Chaoyang Lin
- State Key Laboratory of Rice Biology, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jianhua Gao
- College of Life Science, Shanxi Agricultural University, Taigu, China
| | - Zhicheng Shen
- State Key Laboratory of Rice Biology, Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China.
| |
Collapse
|
46
|
Fu J, Song X, Liu B, Shi Y, Shen W, Fang Z, Zhang L. Fitness Cost of Transgenic cry1Ab/c Rice Under Saline-Alkaline Soil Condition. FRONTIERS IN PLANT SCIENCE 2018; 9:1552. [PMID: 30405680 PMCID: PMC6206443 DOI: 10.3389/fpls.2018.01552] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 10/03/2018] [Indexed: 06/08/2023]
Abstract
The environmental release and biosafety of transgenic Bt crops have attracted global attention. China has a large area of saline-alkali land, which is ideal for large-scale production of Bt transgenic rice. Therefore an understanding of the fitness of Bt transgenic rice in saline-alkaline soils and the ability to predict its long-term environmental effects are important for the future sustainable use of these crops. In the present study, we aimed to evaluate the fitness of cry1Ab/c transgenic rice in both farmland and natural ecosystems. Transgenic cry1Ab/c rice Huahui1, for which a national biosafety certificate was obtained, was grown on normal farmland and saline-alkaline soils in a glass greenhouse. The expression pattern of exogenous Cry1Ab/c protein, and vegetative and reproductive fitness of rice were assessed. The expression of the exogenous Cry1Ab/c protein in the transgenic rice grown on saline-alkaline soil was lower than that in the strain grown on farmland soil. Under both the soil conditions, vegetative growth abilities, as evaluated by tiller number and biomass, and reproductive growth abilities, as measured by filled grain number and filled grain weight per plant, showed a significantly higher fitness cost for Huahui1 than that for the parental rice Minghui63 grown under the same soil conditions. In saline-alkaline soil, the fitness cost of Huahui1was moderately higher than that of Minghui63. Therefore, the ecological risk of cry1Ab/c transgenic rice is not expected to be higher than that of parental rice Minghui63 if the former escapes into natural saline-alkaline soil. The results of the present study provide a scientific basis to improve environmental safety assessment of the insect-resistant transgenic rice strain Huahui1 before commercialization.
Collapse
Affiliation(s)
- Jianmei Fu
- Weed Research Lab, College of Life Science, Nanjing Agricultural University, Nanjing, China
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, China
| | - Xiaoling Song
- Weed Research Lab, College of Life Science, Nanjing Agricultural University, Nanjing, China
| | - Biao Liu
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, China
| | - Yu Shi
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Wenjing Shen
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, China
| | - Zhixiang Fang
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, China
| | - Li Zhang
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, China
| |
Collapse
|
47
|
Wang X, Liu Q, Meissle M, Peng Y, Wu K, Romeis J, Li Y. Bt rice could provide ecological resistance against nontarget planthoppers. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:1748-1755. [PMID: 29509980 PMCID: PMC6131420 DOI: 10.1111/pbi.12911] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/17/2018] [Accepted: 02/23/2018] [Indexed: 05/03/2023]
Abstract
Genetically engineered (GE) rice lines expressing Lepidoptera-active insecticidal cry genes from the bacterium Bacillus thuringiensis (Bt) have been developed in China. Field surveys indicated that Bt rice harbours fewer rice planthoppers than non-Bt rice although planthoppers are not sensitive to the produced Bt Cry proteins. The mechanisms underlying this phenomenon remain unknown. Here, we show that the low numbers of planthoppers on Bt rice are associated with reduced caterpillar damage. In laboratory and field-cage experiments, the rice planthopper Nilapavata lugens had no feeding preference for undamaged Bt or non-Bt plants but exhibited a strong preference for caterpillar-damaged plants whether Bt or non-Bt. Under open-field conditions, rice planthoppers were more abundant on caterpillar-damaged non-Bt rice than on neighbouring healthy Bt rice. GC-MS analyses showed that caterpillar damage induced the release of rice plant volatiles known to be attractive to planthoppers, and metabolome analyses revealed increased amino acid contents and reduced sterol contents known to benefit planthopper development. That Lepidoptera-resistant Bt rice is less attractive to this important nontarget pest in the field is therefore a first example of ecological resistance of Bt plants to nontarget pests. Our findings suggest that non-Bt rice refuges established for delaying the development of Bt resistance may also act as a trap crop for N. lugens and possibly other planthoppers.
Collapse
Affiliation(s)
- Xingyun Wang
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Qingsong Liu
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Michael Meissle
- Research Division Agroecology and EnvironmentAgroscopeZurichSwitzerland
| | - Yufa Peng
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Kongming Wu
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Jörg Romeis
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
- Research Division Agroecology and EnvironmentAgroscopeZurichSwitzerland
| | - Yunhe Li
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| |
Collapse
|
48
|
Xu Q, Dai R, Ruan Y, Rensing C, Liu M, Guo S, Ling N, Shen Q. Probing active microbes involved in Bt-containing rice straw decomposition. Appl Microbiol Biotechnol 2018; 102:10273-10284. [PMID: 30269215 DOI: 10.1007/s00253-018-9394-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 09/09/2018] [Accepted: 09/13/2018] [Indexed: 11/30/2022]
Abstract
Transgenic Bacillus thuringiensis (Bt) rice extends significant protection against insect pests and meets the increasing demands for food and energy. Many studies have been conducted investigating the impacts of Bt rice to the agricultural ecosystem, but much less attention has been given to efforts attempting to determine how the presence of Bt rice influences and shapes the microbial community, especially the active microbes. Stable isotope probing and high-throughput sequencing were employed to explore the active microbes involved in Bt-containing straw decomposition. Compared to its near isoline, the Bt straw contained higher contents of total N, total P, total K, lignin, cellulose, and Cry1Ab toxin protein. These chemical differences did not affect the decomposition rate but significantly changed the active microbial decomposer communities. During the decomposition of Bt-containing straw, fungi were more affected than bacteria. Agromyces, Terrabacter, Microbacterium, Glycomyces, and Kribbella were the most representative unique (existed only in the Bt treatments and appeared at the early stage) bacterial genera, and Trichoderma was the most representative unique fungal genus in the Bt straw decomposition. By using similarity index calculation and function prediction, the significant differences between Bt straw and non-Bt straw treatments were found to be transient for both microbial taxa and functional traits. These results suggested that Bt rice has a significant but transient impact on soil microbes in terms of microbial straw decomposition.
Collapse
Affiliation(s)
- Qicheng Xu
- Jiangsu Provincial Coordinated Research Center for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Rongbo Dai
- Jiangsu Provincial Coordinated Research Center for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yang Ruan
- Jiangsu Provincial Coordinated Research Center for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Manqiang Liu
- Jiangsu Provincial Coordinated Research Center for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shiwei Guo
- Jiangsu Provincial Coordinated Research Center for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ning Ling
- Jiangsu Provincial Coordinated Research Center for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Qirong Shen
- Jiangsu Provincial Coordinated Research Center for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| |
Collapse
|
49
|
Jiang P, Zhang K, Ding Z, He Q, Li W, Zhu S, Cheng W, Zhang K, Li K. Characterization of a strong and constitutive promoter from the Arabidopsis serine carboxypeptidase-like gene AtSCPL30 as a potential tool for crop transgenic breeding. BMC Biotechnol 2018; 18:59. [PMID: 30241468 PMCID: PMC6151023 DOI: 10.1186/s12896-018-0470-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 09/13/2018] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Transgenic technology has become an important technique for crop genetic improvement. The application of well-characterized promoters is essential for developing a vector system for efficient genetic transformation. Therefore, isolation and functional validation of more alternative constitutive promoters to the CaMV35S promoter is highly desirable. RESULTS In this study, a 2093-bp sequence upstream of the translation initiation codon ATG of AtSCPL30 was isolated as the full-length promoter (PD1). To characterize the AtSCPL30 promoter (PD1) and eight 5' deleted fragments (PD2-PD9) of different lengths were fused with GUS to produce the promoter::GUS plasmids and were translocated into Nicotiana benthamiana. PD1-PD9 could confer strong and constitutive expression of transgenes in almost all tissues and development stages in Nicotiana benthamiana transgenic plants. Additionally, PD2-PD7 drove transgene expression consistently over twofold higher than the well-used CaMV35S promoter under normal and stress conditions. Among them, PD7 was only 456 bp in length, and its transcriptional activity was comparable to that of PD2-PD6. Moreover, GUS transient assay in the leaves of Nicotiana benthamiana revealed that the 162-bp (- 456~ - 295 bp) and 111-bp (- 294~ - 184 bp) fragments from the AtSCPL30 promoter could increase the transcriptional activity of mini35S up to 16- and 18-fold, respectively. CONCLUSIONS As a small constitutive strong promoter of plant origin, PD7 has the advantage of biosafety and reduces the probability of transgene silencing compared to the virus-derived CaMV35S promoter. PD7 would also be an alternative constitutive promoter to the CaMV35S promoter when multigene transformation was performed in the same vector, thereby avoiding the overuse of the CaMV35S promoter and allowing for the successful application of transgenic technology. And, the 162- and 111-bp fragments will also be very useful for synthetic promoter design based on their high enhancer activities.
Collapse
Affiliation(s)
- Pingping Jiang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, Shandong China
| | - Ke Zhang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, Shandong China
| | - Zhaohua Ding
- Maize Institute of Shandong Academy of Agricultural Sciences, Jinan, Shandong China
| | - Qiuxia He
- Biology Institute of Shandong Academy of Sciences, Jinan, Shandong China
| | - Wendi Li
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, Shandong China
| | - Shuangfeng Zhu
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, Shandong China
| | - Wen Cheng
- Maize Institute of Shandong Academy of Agricultural Sciences, Jinan, Shandong China
| | - Kewei Zhang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, Shandong China
| | - Kunpeng Li
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, Shandong China
| |
Collapse
|
50
|
Li H, Li J, Xu R, Qin R, Song F, Li L, Wei P, Yang J. Isolation of five rice nonendosperm tissue-expressed promoters and evaluation of their activities in transgenic rice. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:1138-1147. [PMID: 29105251 PMCID: PMC5978396 DOI: 10.1111/pbi.12858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 10/17/2017] [Accepted: 10/28/2017] [Indexed: 06/07/2023]
Abstract
Using promoters expressed in nonendosperm tissues to activate target genes in specific plant tissues or organs with very limited expression in the endosperm is an attractive approach in crop transgenic engineering. In this article, five putative nonendosperm tissue-expressed promoters were cloned from the rice genome and designated POsNETE1 , POsNETE2 , POsNETE3 , POsNETE4 and POsNETE5 . By qualitatively and quantitatively examining GUSplus reporter gene expression in transgenic rice plants, POsNETE1 -POsNETE5 were all found to be active in the roots, leaves, stems, sheaths and panicles but not in the endosperm of plants at different developmental stages. In addition, POsNETE2 , POsNETE4 and POsNETE5 were also inactive in rice embryos. Among these promoters, POsNETE4 and POsNETE5 exhibited higher activities in all of the tested tissues, and their activities in stems, leaves, roots and sheaths were higher than or comparable to those of the rice Actin1 promoter. We also progressively monitored the activities of POsNETE1 -POsNETE5 in two generations of single-copy lines and found that these promoters were stably expressed between generations. Transgenic rice was produced using POsNETE4 and POsNETE5 to drive a modified Bt gene, mCry1Ab. Bt protein expressed in the tested plants ranged from 1769.4 to 4428.8 ng/g fresh leaves, whereas Bt protein was barely detected in the endosperm. Overall, our study identified five novel nonendosperm tissue-expressed promoters that might be suitable for rice genetic engineering and might reduce potential social concern regarding the safety of GMO crops.
Collapse
Affiliation(s)
- Hao Li
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural SciencesHefeiChina
| | - Juan Li
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural SciencesHefeiChina
| | - Rongfang Xu
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural SciencesHefeiChina
| | - Ruiying Qin
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural SciencesHefeiChina
| | - Fengshun Song
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural SciencesHefeiChina
| | - Li Li
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural SciencesHefeiChina
| | - Pengcheng Wei
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural SciencesHefeiChina
| | - Jianbo Yang
- Key Laboratory of Rice Genetic Breeding of Anhui ProvinceRice Research InstituteAnhui Academy of Agricultural SciencesHefeiChina
| |
Collapse
|