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Zhang X, Han C, Wang Y, Liu T, Liang Y, Cao Y. Integrated analysis of transcriptomics and metabolomics of garden asparagus (Asparagus officinalis L.) under drought stress. BMC PLANT BIOLOGY 2024; 24:563. [PMID: 38879466 PMCID: PMC11179350 DOI: 10.1186/s12870-024-05286-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Accepted: 06/10/2024] [Indexed: 06/19/2024]
Abstract
BACKGROUND Drought is a leading environmental factor affecting plant growth. To explore the drought tolerance mechanism of asparagus, this study analyzed the responses of two asparagus varieties, namely, 'Jilv3' (drought tolerant) and 'Pacific Early' (drought sensitive), to drought stress using metabolomics and transcriptomics. RESULTS In total, 2,567 and 7,187 differentially expressed genes (DEGs) were identified in 'Pacific Early' and 'Jilv3', respectively, by comparing the transcriptome expression patterns between the normal watering treatment and the drought stress treatment. These DEGs were significantly enriched in the amino acid biosynthesis, carbon metabolism, phenylpropanoid biosynthesis, and plant hormone signal transduction pathways. In 'Jilv3', DEGs were also enriched in the following energy metabolism-related pathways: citrate cycle (TCA cycle), glycolysis/gluconeogenesis, and pyruvate metabolism. This study also identified 112 and 254 differentially accumulated metabolites (DAMs) in 'Pacific Early' and 'Jilv3' under drought stress compared with normal watering, respectively. The amino acid, flavonoid, organic acid, and soluble sugar contents were more significantly enhanced in 'Jilv3' than in 'Pacific Early'. According to the metabolome and transcriptome analysis, in 'Jilv3', the energy supply of the TCA cycle was improved, and flavonoid biosynthesis increased. As a result, its adaptability to drought stress improved. CONCLUSIONS These findings help to better reveal the molecular mechanism underlying how asparagus responds to drought stress and improve researchers' ability to screen drought-tolerant asparagus varieties as well as breed new varieties.
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Affiliation(s)
- Xuhong Zhang
- Institute of Cash Crops, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, China
- Shijiazhuang Landscape Management and Protection Center, Shijiazhuang, China
| | - Changzhi Han
- College of Biodiversity Conservation, Southwest Forestry University, Kunming, China
| | - Yubo Wang
- Institute of Cash Crops, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, China
| | - Tao Liu
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Yuqin Liang
- Institute of Cash Crops, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, China
| | - Yanpo Cao
- Institute of Cash Crops, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, China.
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Buell CR, Dardick C, Parrott W, Schmitz RJ, Shih PM, Tsai CJ, Urbanowicz B. Engineering custom morpho- and chemotypes of Populus for sustainable production of biofuels, bioproducts, and biomaterials. FRONTIERS IN PLANT SCIENCE 2023; 14:1288826. [PMID: 37965014 PMCID: PMC10642751 DOI: 10.3389/fpls.2023.1288826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 10/16/2023] [Indexed: 11/16/2023]
Abstract
Humans have been modifying plant traits for thousands of years, first through selection (i.e., domestication) then modern breeding, and in the last 30 years, through biotechnology. These modifications have resulted in increased yield, more efficient agronomic practices, and enhanced quality traits. Precision knowledge of gene regulation and function through high-resolution single-cell omics technologies, coupled with the ability to engineer plant genomes at the DNA sequence, chromatin accessibility, and gene expression levels, can enable engineering of complex and complementary traits at the biosystem level. Populus spp., the primary genetic model system for woody perennials, are among the fastest growing trees in temperate zones and are important for both carbon sequestration and global carbon cycling. Ample genomic and transcriptomic resources for poplar are available including emerging single-cell omics datasets. To expand use of poplar outside of valorization of woody biomass, chassis with novel morphotypes in which stem branching and tree height are modified can be fabricated thereby leading to trees with altered leaf to wood ratios. These morphotypes can then be engineered into customized chemotypes that produce high value biofuels, bioproducts, and biomaterials not only in specific organs but also in a cell-type-specific manner. For example, the recent discovery of triterpene production in poplar leaf trichomes can be exploited using cell-type specific regulatory sequences to synthesize high value terpenes such as the jet fuel precursor bisabolene specifically in the trichomes. By spatially and temporally controlling expression, not only can pools of abundant precursors be exploited but engineered molecules can be sequestered in discrete cell structures in the leaf. The structural diversity of the hemicellulose xylan is a barrier to fully utilizing lignocellulose in biomaterial production and by leveraging cell-type-specific omics data, cell wall composition can be modified in a tailored and targeted specific manner to generate poplar wood with novel chemical features that are amenable for processing or advanced manufacturing. Precision engineering poplar as a multi-purpose sustainable feedstock highlights how genome engineering can be used to re-imagine a crop species.
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Affiliation(s)
- C. Robin Buell
- Center for Applied Genetic Technologies, Institute of Plant Breeding, Genetics, and Genomics, Department of Crop and Soil Sciences, University of Georgia, Athens, GA, United States
| | - Christopher Dardick
- Agricultural Research Service, U.S. Department of Agriculture, Kearneysville, WV, United States
| | - Wayne Parrott
- Center for Applied Genetic Technologies, Institute of Plant Breeding, Genetics, and Genomics, Department of Crop and Soil Sciences, University of Georgia, Athens, GA, United States
| | - Robert J. Schmitz
- Department of Genetics, University of Georgia, Athens, GA, United States
| | - Patrick M. Shih
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, United States
| | - Chung-Jui Tsai
- Department of Genetics, University of Georgia, Athens, GA, United States
- Department of Plant Biology, University of Georgia, Athens, GA, United States
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States
| | - Breeanna Urbanowicz
- Center for Complex Carbohydrate Research, Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA, United States
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Li B, Zhou G, Li Y, Chen X, Yang H, Li Y, Zhu M, Li L. Genome-wide identification of R-SNARE gene family in upland cotton and function analysis of GhVAMP72l response to drought stress. FRONTIERS IN PLANT SCIENCE 2023; 14:1147932. [PMID: 37465385 PMCID: PMC10351383 DOI: 10.3389/fpls.2023.1147932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 06/09/2023] [Indexed: 07/20/2023]
Abstract
Soluble N-ethylmaleimide-sensitive factor attachment protein receptors (R-SNAREs) mainly promoted the assembly of the SNARE complex to drive the final membrane fusion step of membrane transport. Previous research on R-SNAREs has mainly focused on development and growth and has rarely been involved in abiotic stress, especially in cotton. Here, we performed a comprehensive analysis of R-SNARE genes in upland cotton. In total, 51 Gh-R-SNARE genes across six phylogenetic groups were unevenly distributed on 21 chromosomes. Cis elements related to plant growth and response to abiotic stress responses were found in the promoter region of Gh-R-SNAREs. Nine Gh-R-SNARE genes were obviously upregulated under drought stress conditions by RNA-seq and qRT-PCR analysis. Among them, GhVAMP72l might be the key candidate gene contributing to drought stress tolerance in cotton by virus-induced gene silencing (VIGS) assay. These results provide valuable insights for the functional analysis of cotton R-SNAREs in response to drought stress and highlight potential beneficial genes for genetic improvement and breeding in cotton.
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Affiliation(s)
- Bingxuan Li
- Department of Agronomy and Horticulture, Jiangsu Vocational College of Agriculture and Forestry, Jurong, China
| | - Gen Zhou
- Key laboratory of Quality Improvement of Agriculture Products of Zhejiang Province, College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
| | - Yanbin Li
- College of Life Sciences, Xiamen University, Xiamen, China
| | - Xueting Chen
- Shanghai Fisheries Research Institute, Shanghai Fisheries Technical Extension Station, Shanghai, China
| | - Huiting Yang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yan Li
- Basic Medicine Department, Heze Medical College, Heze, China
| | - Minhua Zhu
- Key laboratory of Quality Improvement of Agriculture Products of Zhejiang Province, College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
- College of Landscape and Architecture, Zhejiang A&F University, Hangzhou, China
| | - Libei Li
- Key laboratory of Quality Improvement of Agriculture Products of Zhejiang Province, College of Advanced Agriculture Sciences, Zhejiang A&F University, Hangzhou, China
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Eudes A, Lin CY, De Ben C, Ortega J, Lee MY, Chen YC, Li G, Putnam DH, Mortimer JC, Ronald PC, Scown CD, Scheller HV. Field performance of switchgrass plants engineered for reduced recalcitrance. FRONTIERS IN PLANT SCIENCE 2023; 14:1181035. [PMID: 37324714 PMCID: PMC10266223 DOI: 10.3389/fpls.2023.1181035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/26/2023] [Indexed: 06/17/2023]
Abstract
Switchgrass (Panicum virgatum L.) is a promising perennial bioenergy crop that achieves high yields with relatively low nutrient and energy inputs. Modification of cell wall composition for reduced recalcitrance can lower the costs of deconstructing biomass to fermentable sugars and other intermediates. We have engineered overexpression of OsAT10, encoding a rice BAHD acyltransferase and QsuB, encoding dehydroshikimate dehydratase from Corynebacterium glutamicum, to enhance saccharification efficiency in switchgrass. These engineering strategies demonstrated low lignin content, low ferulic acid esters, and increased saccharification yield during greenhouse studies in switchgrass and other plant species. In this work, transgenic switchgrass plants overexpressing either OsAT10 or QsuB were tested in the field in Davis, California, USA for three growing seasons. No significant differences in the content of lignin and cell wall-bound p-coumaric acid or ferulic acid were detected in transgenic OsAT10 lines compared with the untransformed Alamo control variety. However, the transgenic overexpressing QsuB lines had increased biomass yield and slightly increased biomass saccharification properties compared to the control plants. This work demonstrates good performance of engineered plants in the field, and also shows that the cell wall changes in the greenhouse were not replicated in the field, emphasizing the need to validate engineered plants under relevant field conditions.
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Affiliation(s)
- Aymerick Eudes
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Chien-Yuan Lin
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Christopher De Ben
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Department of Plant Sciences, University of California, Davis, CA, United States
| | - Jasmine Ortega
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Mi Yeon Lee
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Yi-Chun Chen
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Guotian Li
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- Department of Plant Pathology and the Genome Center, University of California, Davis, CA, United States
| | - Daniel H. Putnam
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Department of Plant Sciences, University of California, Davis, CA, United States
| | - Jenny C. Mortimer
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- School of Agriculture, Food and Wine & Waite Research Institute, University of Adelaide, Glen Osmond, SA, Australia
| | - Pamela C. Ronald
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- Department of Plant Pathology and the Genome Center, University of California, Davis, CA, United States
| | - Corinne D. Scown
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- Energy & Biosciences Institute, University of California, Berkeley, CA, United States
| | - Henrik V. Scheller
- Feedstocks and Life-Cycle, Economics and Agronomy Divisions, Joint BioEnergy Institute, Emeryville, CA, United States
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
- Department of Plant and Microbial Biology, University of California-Berkeley, Berkeley, CA, United States
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Gao Y, Lipton AS, Munson CR, Ma Y, Johnson KL, Murray DT, Scheller HV, Mortimer JC. Elongated galactan side chains mediate cellulose-pectin interactions in engineered Arabidopsis secondary cell walls. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023. [PMID: 37029760 DOI: 10.1111/tpj.16242] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 03/23/2023] [Accepted: 03/25/2023] [Indexed: 05/17/2023]
Abstract
The plant secondary cell wall is a thickened matrix of polysaccharides and lignin deposited at the cessation of growth in some cells. It forms the majority of carbon in lignocellulosic biomass, and it is an abundant and renewable source for forage, fiber, materials, fuels, and bioproducts. The complex structure and arrangement of the cell wall polymers mean that the carbon is difficult to access in an economical and sustainable way. One solution is to alter the cell wall polymer structure so that it is more suited to downstream processing. However, it remains difficult to predict what the effects of this engineering will be on the assembly, architecture, and properties of the cell wall. Here, we make use of Arabidopsis plants expressing a suite of genes to increase pectic galactan chain length in the secondary cell wall. Using multi-dimensional solid-state nuclear magnetic resonance, we show that increasing galactan chain length enhances pectin-cellulose spatial contacts and increases cellulose crystallinity. We also found that the increased galactan content leads to fewer spatial contacts of cellulose with xyloglucan and the backbone of pectin. Hence, we propose that the elongated galactan side chains compete with xyloglucan and the pectic backbone for cellulose interactions. Due to the galactan topology, this may result in comparatively weak interactions and disrupt the cell wall architecture. Therefore, introduction of this strategy into trees or other bioenergy crops would benefit from cell-specific expression strategies to avoid negative effects on plant growth.
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Affiliation(s)
- Yu Gao
- Joint BioEnergy Institute, Emeryville, California, 94608, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California, 94720, USA
| | - Andrew S Lipton
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, USA
| | - Coyla R Munson
- Department of Chemistry, University of California Davis, Davis, California, 95616, USA
| | - Yingxuan Ma
- School of BioSciences, The University of Melbourne, Parkville, Victoria, 3052, Australia
- Department of Animal, Plant and Soil Sciences, La Trobe Institute for Agriculture and Food, La Trobe University, Bundoora, Victoria, 3086, Australia
| | - Kim L Johnson
- School of BioSciences, The University of Melbourne, Parkville, Victoria, 3052, Australia
- Department of Animal, Plant and Soil Sciences, La Trobe Institute for Agriculture and Food, La Trobe University, Bundoora, Victoria, 3086, Australia
| | - Dylan T Murray
- Department of Chemistry, University of California Davis, Davis, California, 95616, USA
| | - Henrik V Scheller
- Joint BioEnergy Institute, Emeryville, California, 94608, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California, 94720, USA
- Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, California, 94720, USA
| | - Jenny C Mortimer
- Joint BioEnergy Institute, Emeryville, California, 94608, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California, 94720, USA
- School of Agriculture, Food and Wine, Waite Research Institute, Waite Research Precinct, University of Adelaide, Glen Osmond, South Australia, 5064, Australia
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da Cruz Filho IJ, de Souza TP, dos Anjos Santos CÁ, de Morais Araújo MA, de Oliveira Moraes Miranda JF, de Oliveira Queirós ME, Filho DJNC, da Conceição Alves de Lima A, Marques DSC, do Carmo Alves de Lima M. Xylans extracted from branches and leaves of Protium puncticulatum: antioxidant, cytotoxic, immunomodulatory, anticoagulant, antitumor, prebiotic activities and their structural characterization. 3 Biotech 2023; 13:93. [PMID: 36845077 PMCID: PMC9944590 DOI: 10.1007/s13205-023-03506-1] [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: 11/03/2022] [Accepted: 01/31/2023] [Indexed: 02/23/2023] Open
Abstract
This work aimed to isolate and characterize xylans from branches and leaves of Protium puncticulatum, in addition to evaluating its in vitro biological and prebiotic potential. The results showed that the chemical structure of the obtained polysaccharides is similar being classified as homoxylans. The xylans presented an amorphous structure, in addition to being thermally stable and presenting a molecular weight close to 36 g/mol. With regard to biological activities, it was observed that xylans were able to promote low antioxidant activity (< 50%) in the different assays evaluated. The xylans also showed no toxicity against normal cells, in addition to being able to stimulate cells of the immune system and showing promise as anticoagulant agents. In addition to presenting promising antitumor activity in vitro. In assays of emulsifying activity, xylans were able to emulsify lipids in percentages below 50%. Regarding in vitro prebiotic activity, xylans were able to stimulate and promote the growth of different probiotics. Therefore, this study, in addition to being a pioneer, contributes to the application of these polysaccharides in the biomedical and food areas. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-023-03506-1.
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Affiliation(s)
- Iranildo José da Cruz Filho
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco, 50.670-420, Recife,, Pernambuco Brazil
| | - Thammyris Pires de Souza
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco, 50.670-420, Recife,, Pernambuco Brazil
| | | | | | | | | | | | | | - Diego Santa Clara Marques
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco, 50.670-420, Recife,, Pernambuco Brazil
| | - Maria do Carmo Alves de Lima
- Department of Antibiotics, Biosciences Center, Federal University of Pernambuco, 50.670-420, Recife,, Pernambuco Brazil
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7
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Shahriari AG, Soltani Z, Tahmasebi A, Poczai P. Integrative System Biology Analysis of Transcriptomic Responses to Drought Stress in Soybean ( Glycine max L.). Genes (Basel) 2022; 13:1732. [PMID: 36292617 PMCID: PMC9602024 DOI: 10.3390/genes13101732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/21/2022] [Accepted: 09/20/2022] [Indexed: 11/17/2022] Open
Abstract
Drought is a major abiotic stressor that causes yield losses and limits the growing area for most crops. Soybeans are an important legume crop that is sensitive to water-deficit conditions and suffers heavy yield losses from drought stress. To improve drought-tolerant soybean cultivars through breeding, it is necessary to understand the mechanisms of drought tolerance in soybeans. In this study, we applied several transcriptome datasets obtained from soybean plants under drought stress in comparison to those grown under normal conditions to identify novel drought-responsive genes and their underlying molecular mechanisms. We found 2168 significant up/downregulated differentially expressed genes (DEGs) and 8 core modules using gene co-expression analysis to predict their biological roles in drought tolerance. Gene Ontology and KEGG analyses revealed key biological processes and metabolic pathways involved in drought tolerance, such as photosynthesis, glyceraldehyde-3-phosphate dehydrogenase and cytokinin dehydrogenase activity, and regulation of systemic acquired resistance. Genome-wide analysis of plants' cis-acting regulatory elements (CREs) and transcription factors (TFs) was performed for all of the identified DEG promoters in soybeans. Furthermore, the PPI network analysis revealed significant hub genes and the main transcription factors regulating the expression of drought-responsive genes in each module. Among the four modules associated with responses to drought stress, the results indicated that GLYMA_04G209700, GLYMA_02G204700, GLYMA_06G030500, GLYMA_01G215400, and GLYMA_09G225400 have high degrees of interconnection and, thus, could be considered as potential candidates for improving drought tolerance in soybeans. Taken together, these findings could lead to a better understanding of the mechanisms underlying drought responses in soybeans, which may useful for engineering drought tolerance in plants.
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Affiliation(s)
- Amir Ghaffar Shahriari
- Department of Agriculture and Natural Resources, Higher Education Center of Eghlid, Eghlid 7381943885, Iran
| | - Zahra Soltani
- Institute of Biotechnology, Shiraz University, Shiraz 7144113131, Iran
| | - Aminallah Tahmasebi
- Department of Agriculture, Minab Higher Education Center, University of Hormozgan, Bandar Abbas 7916193145, Iran
- Plant Protection Research Group, University of Hormozgan, Bandar Abbas 7916193145, Iran
| | - Péter Poczai
- Finnish Museum of Natural History, University of Helsinki, P.O. Box 7, FI-00014 Helsinki, Finland
- Faculty of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65, FI-00065 Helsinki, Finland
- Institute of Advanced Studies Kőszeg (iASK), P.O. Box 4, H-9731 Kőszeg, Hungary
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8
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Transcriptome Dynamics Underlying Magnesium Deficiency Stress in Three Founding Saccharum Species. Int J Mol Sci 2022; 23:ijms23179681. [PMID: 36077076 PMCID: PMC9456333 DOI: 10.3390/ijms23179681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/13/2022] [Accepted: 08/16/2022] [Indexed: 11/17/2022] Open
Abstract
Modern sugarcane cultivars were generated through interspecific crossing of the stress resistance Saccharum spontaneum and the high sugar content Saccharum officinarum which was domesticated from Saccharum robustum. Magnesium deficiency (MGD) is particularly prominent in tropical and subtropical regions where sugarcane is grown, but the response mechanism to MGD in sugarcane remains unknown. Physiological and transcriptomic analysis of the three founding Saccharum species under different magnesium (Mg) levels was performed. Our result showed that MGD decreased chlorophyll content and photosynthetic efficiency of three Saccharum species but led to increased starch in leaves and lignin content in roots of Saccharum robustum and Saccharum spontaneum. We identified 12,129, 11,306 and 12,178 differentially expressed genes (DEGs) of Saccharum officinarum, Saccharum robustum and Saccharum spontaneum, respectively. In Saccharum officinarum, MGD affected signal transduction by up-regulating the expression of xylan biosynthesis process-related genes. Saccharum robustum, responded to the MGD by regulating the expression of transcription and detoxification process-related genes. Saccharum spontaneum, avoids damage from MGD by regulating the expression of the signing transduction process and the transformation from growth and development to reproductive development. This novel repertoire of candidate genes related to MGD response in sugarcane will be helpful for engineering MGD tolerant varieties.
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9
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Silva TN, Thomas JB, Dahlberg J, Rhee SY, Mortimer JC. Progress and challenges in sorghum biotechnology, a multipurpose feedstock for the bioeconomy. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:646-664. [PMID: 34644381 PMCID: PMC8793871 DOI: 10.1093/jxb/erab450] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 10/10/2021] [Indexed: 05/09/2023]
Abstract
Sorghum [Sorghum bicolor (L.) Moench] is the fifth most important cereal crop globally by harvested area and production. Its drought and heat tolerance allow high yields with minimal input. It is a promising biomass crop for the production of biofuels and bioproducts. In addition, as an annual diploid with a relatively small genome compared with other C4 grasses, and excellent germplasm diversity, sorghum is an excellent research species for other C4 crops such as maize. As a result, an increasing number of researchers are looking to test the transferability of findings from other organisms such as Arabidopsis thaliana and Brachypodium distachyon to sorghum, as well as to engineer new biomass sorghum varieties. Here, we provide an overview of sorghum as a multipurpose feedstock crop which can support the growing bioeconomy, and as a monocot research model system. We review what makes sorghum such a successful crop and identify some key traits for future improvement. We assess recent progress in sorghum transformation and highlight how transformation limitations still restrict its widespread adoption. Finally, we summarize available sorghum genetic, genomic, and bioinformatics resources. This review is intended for researchers new to sorghum research, as well as those wishing to include non-food and forage applications in their research.
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Affiliation(s)
- Tallyta N Silva
- Joint BioEnergy Institute, Emeryville, CA, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Jason B Thomas
- Carnegie Institution for Science, Department of Plant Biology, Stanford, CA, USA
| | - Jeff Dahlberg
- Joint BioEnergy Institute, Emeryville, CA, USA
- UC-ANR-KARE, 9240 S. Riverbend Ave, Parlier, CA, USA
| | - Seung Y Rhee
- Carnegie Institution for Science, Department of Plant Biology, Stanford, CA, USA
- Correspondence: or
| | - Jenny C Mortimer
- Joint BioEnergy Institute, Emeryville, CA, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, SA, Australia
- Correspondence: or
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10
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Mishra S, Sahu G, Shaw BP. Integrative small RNA and transcriptome analysis provides insight into key role of miR408 towards drought tolerance response in cowpea. PLANT CELL REPORTS 2022; 41:75-94. [PMID: 34570259 DOI: 10.1007/s00299-021-02783-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
Drought stress response studies and overexpression of vun-miR408 proved it to be essential for abiotic stress tolerance in cowpea. Small RNA and transcriptome sequencing of an elite high-yielding drought-tolerant Indian cowpea cultivar, Pusa Komal revealed a differential expression of 198 highly conserved, 21 legume-specific, 14 less-conserved, and 10 novel drought-responsive microRNAs (miRNAs) along with 3391 (up-regulated) and 3799 (down-regulated) genes, respectively, in the leaf and root libraries. Among the differentially expressed miRNAs, vun-miR408-3p, showed an up-regulation of 3.53-log2-fold change under drought stress. Furthermore, laccase 12 (LAC 12) was identified as the potential target of vun-miR408-3p using 5' RNA ligase-mediated rapid amplification of cDNA ends. The stable transgenic cowpea lines overexpressing artificial vun-miR408-3p (OX-amiR408) displayed enhanced drought and salinity tolerance as compared to the wild-type plants. An average increase of 30.17% in chlorophyll, 26.57% in proline, and 27.62% in relative water content along with lesser cellular H2O2 level was observed in the transgenic lines in comparison with the wild-type plants under drought stress. Additionally, the scanning electron microscopic study revealed a decrease in the stomatal aperture and an increase in the trichome density in the transgenic lines. The expression levels of laccase 3 and laccase 12, the potential targets of miR408, related to lipid catabolic processes showed a significant reduction in the wild-type plants under drought stress and the transgenic lines, indicating the regulation of lignin content as a plausibly essential trait related to the drought tolerance in cowpea. Taken together, this study primarily focused on identification of drought-responsive miRNAs and genes in cowpea, and functional validation of role of miR408 towards drought stress response in cowpea.
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Affiliation(s)
- Sagarika Mishra
- Abiotic Stress and Agro-Biotechnology Lab, Institute of Life Sciences, Bhubaneswar, India.
| | - Gyanasri Sahu
- Abiotic Stress and Agro-Biotechnology Lab, Institute of Life Sciences, Bhubaneswar, India
- Regional Centre for Biotechnology, Faridabad, India
| | - Birendra Prasad Shaw
- Abiotic Stress and Agro-Biotechnology Lab, Institute of Life Sciences, Bhubaneswar, India
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11
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Girija A, Han J, Corke F, Brook J, Doonan J, Yadav R, Jifar H, Mur LAJ. Elucidating drought responsive networks in tef (Eragrostis tef) using phenomic and metabolomic approaches. PHYSIOLOGIA PLANTARUM 2022; 174:e13597. [PMID: 34792806 DOI: 10.1111/ppl.13597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/28/2021] [Accepted: 11/10/2021] [Indexed: 06/13/2023]
Abstract
Drought is a major abiotic stress that limits crop productivity and is driving the need to introduce new tolerant crops with better economic yield. Tef (Eragrostis tef) is a neglected (orphan) Ethiopian warm-season annual gluten-free cereal with high nutritional and health benefits. Further, tef is resilient to environmental challenges such as drought, but the adaptive mechanisms remain poorly understood. In this study, metabolic changes associated with drought response in 11 tef accessions were identified using phenomic and metabolomic approaches under controlled conditions. Computerized image analysis of droughted plants indicated reductions in leaf area and green pigments compared with controls. Metabolite profiling based on flow-infusion electrospray-high-resolution mass spectroscopy (FIE-HRMS) showed drought associated changes in flavonoid, phenylpropanoid biosynthesis, sugar metabolism, valine, leucine and isoleucine biosynthesis, and pentose phosphate pathways. Flavonoid associated metabolites and TCA intermediates were lower in the drought group, whereas most of the stress-responsive amino acids and sugars were elevated. Interestingly, after drought treatment, one accession Enatite (Ent) exhibited a significantly higher plant area than the others, and greater accumulation of flavonoids, amino acids (serine and glycine), sugars (ribose, myo-inositol), and fatty acids. The increased accumulation of these metabolites could explain the increased tolerance to drought in Ent compared with other accessions. This is the first time a non-targeted metabolomics approach has been applied in tef, and our results provide a framework for a better understanding of the tef metabolome during drought stress that will help to identify traits to improve this understudied potential crop.
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Affiliation(s)
- Aiswarya Girija
- Institute of Biological, Environmental and Rural Science, Aberystwyth University, Aberystwyth, Wales, UK
| | - Jiwan Han
- Software College, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Fiona Corke
- Institute of Biological, Environmental and Rural Science, Aberystwyth University, Aberystwyth, Wales, UK
- The National Plant Phenomics Centre, Aberystwyth University, Aberystwyth, Wales, UK
| | - Jason Brook
- Institute of Biological, Environmental and Rural Science, Aberystwyth University, Aberystwyth, Wales, UK
- The National Plant Phenomics Centre, Aberystwyth University, Aberystwyth, Wales, UK
| | - John Doonan
- Institute of Biological, Environmental and Rural Science, Aberystwyth University, Aberystwyth, Wales, UK
- The National Plant Phenomics Centre, Aberystwyth University, Aberystwyth, Wales, UK
| | - Rattan Yadav
- Institute of Biological, Environmental and Rural Science, Aberystwyth University, Aberystwyth, Wales, UK
- The National Plant Phenomics Centre, Aberystwyth University, Aberystwyth, Wales, UK
| | - Habte Jifar
- National Tef Improvement Program, Ethiopian Institute of Agricultural Research, Addis Ababa, Ethiopia
| | - Luis A J Mur
- Institute of Biological, Environmental and Rural Science, Aberystwyth University, Aberystwyth, Wales, UK
- Software College, Shanxi Agricultural University, Taigu, Shanxi, China
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12
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Jin J, Zhao M, Gao T, Jing T, Zhang N, Wang J, Zhang X, Huang J, Schwab W, Song C. Amplification of early drought responses caused by volatile cues emitted from neighboring plants. HORTICULTURE RESEARCH 2021; 8:243. [PMID: 34782598 PMCID: PMC8593122 DOI: 10.1038/s41438-021-00704-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 09/16/2021] [Accepted: 09/24/2021] [Indexed: 05/02/2023]
Abstract
Plants have developed sophisticated mechanisms to survive in dynamic environments. Plants can communicate via volatile organic compounds (VOCs) to warn neighboring plants of threats. In most cases, VOCs act as positive regulators of plant defense. However, the communication and role of volatiles in response to drought stress are poorly understood. Here, we showed that tea plants release numerous VOCs. Among them, methyl salicylate (MeSA), benzyl alcohol, and phenethyl alcohol markedly increased under drought stress. Interestingly, further experiments revealed that drought-induced MeSA lowered the abscisic acid (ABA) content in neighboring plants by reducing 9-cis-epoxycarotenoid dioxygenase (NCED) gene expression, resulting in inhibition of stomatal closure and ultimately decreasing early drought tolerance in neighboring plants. Exogenous application of ABA reduced the wilting of tea plants caused by MeSA exposure. Exposure of Nicotiana benthamiana to MeSA also led to severe wilting, indicating that the ability of drought-induced MeSA to reduce early drought tolerance in neighboring plants may be conserved in other plant species. Taken together, these results provide evidence that drought-induced volatiles can reduce early drought tolerance in neighboring plants and lay a novel theoretical foundation for optimizing plant density and spacing.
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Affiliation(s)
- Jieyang Jin
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China
| | - Mingyue Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China
| | - Ting Gao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China
| | - Tingting Jing
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China
| | - Na Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China
| | - Jingming Wang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China
| | - Xianchen Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China
| | - Jin Huang
- Biotechnology Institute, Chengdu Newsun Crop Science Co., Ltd, 610212, Chengdu, P. R. China
| | - Wilfried Schwab
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, 85354, Freising, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 230036, Hefei, Anhui, P. R. China.
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13
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Capelari ÉF, Dos Anjos L, Rodrigues NF, Sousa RMDJ, Silvera JAG, Margis R. Transcriptional profiling and physiological responses reveal new insights into drought tolerance in a semiarid adapted species, Anacardium occidentale. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23:1074-1085. [PMID: 34418258 DOI: 10.1111/plb.13312] [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: 03/04/2021] [Accepted: 05/05/2021] [Indexed: 06/13/2023]
Abstract
Water stress affects plant performance at various organisational levels, from morphological to molecular, with a drastic drop in crop yield. Integrative studies involving transcriptomics and physiological data in recognized tolerant species are appropriate strategies to identify and understand molecular and functional processes related to water deficit tolerance. The cashew tree (Anacardium occidentale) is a species naturally adapted to environments with low water availability associated with adverse conditions such as heat, high radiation and salinity. We used an integrative strategy, combining classical physiological measurements with high throughput RNA-seq to understand the main adaptive mechanisms of cashew to water deficit followed by recovery. Physiological analyses indicate that young cashew plants display typical isohydric behaviour. They first exhibit rapid stomatal closure, followed by CO2 assimilation, thus preserving the relative water content, membrane integrity and photosystem II activity. Differential expression was observed in 1733 genes from plant leaves exposed to water deficit stress for 26 days. Among them, 705 were upregulated and 1028 were downregulated. After rewatering, 1330 (76.7%) genes returned to their basal expression level. Transcriptional, combined with physiological data, reveal that cashew plants display high phenotypic plasticity and resilience to acute water deficit, and do not activate senescence pathways. A series of genes/pathways and processes involved with drought tolerance in cashew are evidenced, particularly in carbon metabolism, photosynthesis and chloroplast homeostasis.
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Affiliation(s)
- É F Capelari
- Programa de Pós Graduação em Genética e Biologia Molecular (PPGBM), Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - L Dos Anjos
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, CEP, Brazil
| | - N F Rodrigues
- Programa de Pós Graduação em Genética e Biologia Molecular (PPGBM), Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - R M de J Sousa
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, CEP, Brazil
| | - J A G Silvera
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, CEP, Brazil
| | - R Margis
- Programa de Pós Graduação em Genética e Biologia Molecular (PPGBM), Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Centro de Biotecnologia, Laboratório de Genomas e Populações de Plantas (LGPP), Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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14
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Xin A, Herburger K. Precursor biosynthesis regulation of lignin, suberin and cutin. PROTOPLASMA 2021; 258:1171-1178. [PMID: 34120228 DOI: 10.1007/s00709-021-01676-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Abstract
The extracellular matrix of plants can contain the hydrophobic biopolymers lignin, suberin and/or cutin, which provide mechanical strength and limit water loss and pathogen invasion. Due to their remarkable chemical resistance, these polymers have a high potential in various biotechnological applications and can replace petrol-based resources, for example, in the packing industry. However, despite the importance of these polymers, the regulation of their precursor biosynthesis is far from being fully understood. This is particularly true for suberin and cutin, which hinders efforts to engineer their formation in plants and produce customised biopolymers. This review brings attention to knowledge gaps in the current research and highlights some of the most recent findings on transcription factors that regulate lignin, suberin and cutin precursor biosynthesis. Finally, we also briefly discuss how some of the remaining knowledge gaps can be closed.
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Affiliation(s)
- Anzhou Xin
- Section for Plant Glycobiology, Department of Plant and Environmental Sciences, University of Copenhagen, 1871, Frederiksberg, Denmark
| | - Klaus Herburger
- Section for Plant Glycobiology, Department of Plant and Environmental Sciences, University of Copenhagen, 1871, Frederiksberg, Denmark.
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15
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Sørensen M, Møller BL. Metabolic Engineering of Photosynthetic Cells – in Collaboration with Nature. Metab Eng 2021. [DOI: 10.1002/9783527823468.ch21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Xu C, Wei L, Huang S, Yang C, Wang Y, Yuan H, Xu Q, Zhang W, Wang M, Zeng X, Luo J. Drought Resistance in Qingke Involves a Reprogramming of the Phenylpropanoid Pathway and UDP-Glucosyltransferase Regulation of Abiotic Stress Tolerance Targeting Flavonoid Biosynthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:3992-4005. [PMID: 33769045 DOI: 10.1021/acs.jafc.0c07810] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Tibetan hulless barley (qingke) is an important food crop in the Tibetan plateau. However, it often suffers from drought stress resulting in reduction of food production because of the extreme plateau environment. To elucidate the molecular mechanisms underlying the drought resistance of qingke, the transcriptomic and metabolomic responses of drought-sensitive (D) and drought-resistant (XL) accessions were characterized in experiments with a time course design. The phenylpropanoid pathway was reprogrammed by downregulating the lignin pathway and increasing the biosynthesis of flavonoids and anthocyanins, and this regulation improved plant tolerance for drought stress. Besides, flavonoid glycosides have induced accumulation of metabolites that participated in drought stress resistance. HVUL7H11410 exhibited the activity of wide-spectrum glucosyltransferase and mediated flavonoid glycosylation to enhance drought stress resistance. Overall, the findings provide insights into the regulatory mechanism underlying drought stress tolerance associated with metabolic reprogramming. Furthermore, the flavonoid-enriched qingke is more tolerant to drought stress and can be used as a functional food to benefit human health.
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Affiliation(s)
- Congping Xu
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Lingling Wei
- State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa 850002, China
| | - Sishu Huang
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Chunbao Yang
- State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa 850002, China
- Agricultural Research Institute, Tibet Academy of Agricultural and Animal Husbandry Sciences Lhasa, Tibet 850002, China
- Plant Sciences College, Tibet Agriculture & Animal Husbandry University, Nyingchi, Tibet 860000, China
| | - Yulin Wang
- State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa 850002, China
- Agricultural Research Institute, Tibet Academy of Agricultural and Animal Husbandry Sciences Lhasa, Tibet 850002, China
- Plant Sciences College, Tibet Agriculture & Animal Husbandry University, Nyingchi, Tibet 860000, China
| | - Hongjun Yuan
- State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa 850002, China
- Agricultural Research Institute, Tibet Academy of Agricultural and Animal Husbandry Sciences Lhasa, Tibet 850002, China
- Plant Sciences College, Tibet Agriculture & Animal Husbandry University, Nyingchi, Tibet 860000, China
| | - Qijun Xu
- State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa 850002, China
- Agricultural Research Institute, Tibet Academy of Agricultural and Animal Husbandry Sciences Lhasa, Tibet 850002, China
- Plant Sciences College, Tibet Agriculture & Animal Husbandry University, Nyingchi, Tibet 860000, China
| | - Weiqin Zhang
- Wuhan Metware Biotechnology Co., Ltd., Wuhan 430070, China
| | - Mu Wang
- Plant Sciences College, Tibet Agriculture & Animal Husbandry University, Nyingchi, Tibet 860000, China
| | - Xingquan Zeng
- State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement, Lhasa 850002, China
- Agricultural Research Institute, Tibet Academy of Agricultural and Animal Husbandry Sciences Lhasa, Tibet 850002, China
- Plant Sciences College, Tibet Agriculture & Animal Husbandry University, Nyingchi, Tibet 860000, China
| | - Jie Luo
- College of Tropical Crops, Hainan University, Haikou 570228, China
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17
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Liu Y, Cruz-Morales P, Zargar A, Belcher MS, Pang B, Englund E, Dan Q, Yin K, Keasling JD. Biofuels for a sustainable future. Cell 2021; 184:1636-1647. [PMID: 33639085 DOI: 10.1016/j.cell.2021.01.052] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/16/2021] [Accepted: 01/27/2021] [Indexed: 12/26/2022]
Abstract
Rapid increases of energy consumption and human dependency on fossil fuels have led to the accumulation of greenhouse gases and consequently, climate change. As such, major efforts have been taken to develop, test, and adopt clean renewable fuel alternatives. Production of bioethanol and biodiesel from crops is well developed, while other feedstock resources and processes have also shown high potential to provide efficient and cost-effective alternatives, such as landfill and plastic waste conversion, algal photosynthesis, as well as electrochemical carbon fixation. In addition, the downstream microbial fermentation can be further engineered to not only increase the product yield but also expand the chemical space of biofuels through the rational design and fine-tuning of biosynthetic pathways toward the realization of "designer fuels" and diverse future applications.
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Affiliation(s)
- Yuzhong Liu
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, USA
| | - Pablo Cruz-Morales
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, USA
| | - Amin Zargar
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, USA
| | - Michael S Belcher
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Bo Pang
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, USA
| | - Elias Englund
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, USA
| | - Qingyun Dan
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, USA
| | - Kevin Yin
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Jay D Keasling
- Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; Division of Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, USA; Departments of Chemical and Biomolecular Engineering and of Bioengineering, University of California, Berkeley, Berkeley, CA, USA; Novo Nordisk Foundation Center for Biosustainability, Technical University Denmark, Horsholm, Denmark; Center for Synthetic Biochemistry, Shenzhen Institutes for Advanced Technologies, Shenzhen, China.
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18
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Qaseem MF, Wu AM. Balanced Xylan Acetylation is the Key Regulator of Plant Growth and Development, and Cell Wall Structure and for Industrial Utilization. Int J Mol Sci 2020; 21:ijms21217875. [PMID: 33114198 PMCID: PMC7660596 DOI: 10.3390/ijms21217875] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/21/2020] [Accepted: 10/21/2020] [Indexed: 12/27/2022] Open
Abstract
Xylan is the most abundant hemicellulose, constitutes about 25–35% of the dry biomass of woody and lignified tissues, and occurs up to 50% in some cereal grains. The accurate degree and position of xylan acetylation is necessary for xylan function and for plant growth and development. The post synthetic acetylation of cell wall xylan, mainly regulated by Reduced Wall Acetylation (RWA), Trichome Birefringence-Like (TBL), and Altered Xyloglucan 9 (AXY9) genes, is essential for effective bonding of xylan with cellulose. Recent studies have proven that not only xylan acetylation but also its deacetylation is vital for various plant functions. Thus, the present review focuses on the latest advances in understanding xylan acetylation and deacetylation and explores their effects on plant growth and development. Baseline knowledge about precise regulation of xylan acetylation and deacetylation is pivotal to developing plant biomass better suited for second-generation liquid biofuel production.
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Affiliation(s)
- Mirza Faisal Qaseem
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China;
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architectures, South China Agricultural University, Guangzhou 510642, China
| | - Ai-Min Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China;
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architectures, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, China
- Correspondence:
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19
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Thornburg NE, Pecha MB, Brandner DG, Reed ML, Vermaas JV, Michener WE, Katahira R, Vinzant TB, Foust TD, Donohoe BS, Román-Leshkov Y, Ciesielski PN, Beckham GT. Mesoscale Reaction-Diffusion Phenomena Governing Lignin-First Biomass Fractionation. CHEMSUSCHEM 2020; 13:4495-4509. [PMID: 32246557 DOI: 10.1002/cssc.202000558] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Indexed: 05/21/2023]
Abstract
Lignin solvolysis from the plant cell wall is the critical first step in lignin depolymerization processes involving whole biomass feedstocks. However, little is known about the coupled reaction kinetics and transport phenomena that govern the effective rates of lignin extraction. Here, we report a validated simulation framework that determines intrinsic, transport-independent kinetic parameters for the solvolysis of lignin, hemicellulose, and cellulose upon incorporation of feedstock characteristics for the methanol-based extraction of poplar as an example fractionation process. Lignin fragment diffusion is predicted to compete on the same time and length scales as reactions of lignin within cell walls and longitudinal pores of typical milled particle sizes, and mass transfer resistances are predicted to dominate the solvolysis of poplar particles that exceed approximately 2 mm in length. Beyond the approximately 2 mm threshold, effectiveness factors are predicted to be below 0.25, which implies that pore diffusion resistances may attenuate observable kinetic rate measurements by at least 75 % in such cases. Thus, researchers are recommended to conduct kinetic evaluations of lignin-first catalysts using biomass particles smaller than approximately 0.2 mm in length to avoid feedstock-specific mass transfer limitations in lignin conversion studies. Overall, this work highlights opportunities to improve lignin solvolysis by genetic engineering and provides actionable kinetic information to guide the design and scale-up of emerging biorefinery strategies.
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Affiliation(s)
- Nicholas E Thornburg
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - M Brennan Pecha
- Biosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - David G Brandner
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Michelle L Reed
- Biosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Josh V Vermaas
- Biosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - William E Michener
- Biosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Rui Katahira
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Todd B Vinzant
- Biosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Thomas D Foust
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Bryon S Donohoe
- Biosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Yuriy Román-Leshkov
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Peter N Ciesielski
- Biosciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Gregg T Beckham
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
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20
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Liu W, Jiang Y, Wang C, Zhao L, Jin Y, Xing Q, Li M, Lv T, Qi H. Lignin synthesized by CmCAD2 and CmCAD3 in oriental melon (Cucumis melo L.) seedlings contributes to drought tolerance. PLANT MOLECULAR BIOLOGY 2020; 103:689-704. [PMID: 32472480 DOI: 10.1007/s11103-020-01018-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 05/26/2020] [Indexed: 05/20/2023]
Abstract
CmCAD2 and CmCAD3 function more positively than CmCAD1 in oriental melon for lignin synthesis which is important to ensure internal water status and thus for drought tolerance. Well-lignification may be the guarantee of efficient axial water transport and barrier of lateral water flow in oriental melon tolerating drought stress, however remains to be verified. As an important enzyme in monolignol synthesis pathway, five cinnamyl alcohol dehydrogenase (CAD) genes were generally induced in melon seedlings by drought. Here we further revealed the roles of CmCAD1, 2, and 3 in lignin synthesis and for drought tolerance. Results found that overexpressing CmCAD2 or 3 strongly recovered CAD activities, lignin synthesis and composition in Arabidopsis cadc cadd, whose lignin synthesis is disrupted, while CmCAD1 functioned modestly. In melon seedlings, silenced CmCAD2 and 3 individually or collectively decreased CAD activities and lignin depositions drastically, resulting in dwarfed phenotypes. Reduced lignin, mainly composed by guaiacyl units catalyzed by CmCAD3, is mainly due to the limited lignification in tracheary elements and development of Casparion strip. While CmCAD1 and 2 exhibited catalysis to p-coumaraldehyde and sinapaldehyde, respectively. Compared with CmCAD1, drought treatments revealed higher sensitivity of CmCAD2 and/or 3 silenced melon seedlings, accompanying with lower relative water contents, water potentials and relatively higher total soluble sugar contents. Slightly up-regulated expressions of aquaporin genes together with limited lignification might imply higher lateral water loss in stems of silenced lines. In Arabidopsis, CmCAD2 and 3 transgenic lines enhanced cadc cadd drought tolerance through recovering lignin synthesis and root development, accompanying with decreased electrolyte leakage ratios and increased RWCs, thus improved survival rates. Briefly, lignin synthesized by CmCAD2 and 3 functions importantly for drought tolerance in melon.
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Affiliation(s)
- Wei Liu
- Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, National & Local Joint Engineering Research Center of Northern Horticultural, Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning, People's Republic of China
| | - Yun Jiang
- Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, National & Local Joint Engineering Research Center of Northern Horticultural, Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning, People's Republic of China
| | - Chenghui Wang
- Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, National & Local Joint Engineering Research Center of Northern Horticultural, Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning, People's Republic of China
- College of Ecology and Garden Architecture, Dezhou University, Dezhou, 253023, People's Republic of China
| | - Lili Zhao
- Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, National & Local Joint Engineering Research Center of Northern Horticultural, Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning, People's Republic of China
- Institute of Vegetable Research, Liaoning Academy of Agricultural Sciences, Shenyang, 110866, Liaoning, People's Republic of China
| | - Yazhong Jin
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, People's Republic of China
| | - Qiaojuan Xing
- Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, National & Local Joint Engineering Research Center of Northern Horticultural, Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning, People's Republic of China
| | - Meng Li
- Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, National & Local Joint Engineering Research Center of Northern Horticultural, Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning, People's Republic of China
| | - Tinghui Lv
- Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, National & Local Joint Engineering Research Center of Northern Horticultural, Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning, People's Republic of China
| | - Hongyan Qi
- Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, National & Local Joint Engineering Research Center of Northern Horticultural, Facilities Design & Application Technology (Liaoning), College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning, People's Republic of China.
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Li MQ, Yang J, Wang X, Li DX, Zhang CB, Tian ZH, You MH, Bai SQ, Lin HH. Transcriptome profiles identify the common responsive genes to drought stress in two Elymus species. JOURNAL OF PLANT PHYSIOLOGY 2020; 250:153183. [PMID: 32422512 DOI: 10.1016/j.jplph.2020.153183] [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: 12/26/2019] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 06/11/2023]
Abstract
Elymus, the largest genus of the Triticeae Dumort, is a forage grass in the Qinghai-Tibetan Plateau, where the climate has gradually become increasingly dry in recent years. To understand the mechanisms of the response to drought stress in Elymus species, we first investigated physiological and biochemical responses to polyethylene glycol (PEG-6000) simulated drought stress in two Elymus species, Elymus nutans and Elymus sibiricus, and found that E. nutans was more tolerant to drought stress than E. sibiricus. De novo transcriptome analysis of these two Elymus species treated with or without 10 % PEG-6000 revealed that a total of 1695 unigenes were commonly regulated by drought treatment in these two Elymus species, with 1614 unigenes up-regulated and 81 unigenes down-regulated. The coexpressed differentially expressed genes (DEGs) were enriched in regulation of transcription and gene expression in the GO database. KEGG pathway analysis indicated plant hormone signaling transduction were mostly enriched in co-expressed DEGs. Furthermore, genes annotated in the plant hormone signaling transduction were screened from co-expressed DEGs, and found that abscisic acid plays the major role in the drought stress tolerance of Elymus. Meanwhile, transcription factors screened from co-expressed DEGs were mainly classified into the ERF subfamily and WRKY, DREB, and HSF family members. Our results provide further reference for studying the response mechanism and culturing highly tolerant grasses of the Elymus species under drought stress.
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Affiliation(s)
- Ming-Qun Li
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University, Chengdu, 610065, Sichuan, China
| | - Jian Yang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University, Chengdu, 610065, Sichuan, China.
| | - Xin Wang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University, Chengdu, 610065, Sichuan, China
| | - Da-Xu Li
- Sichuan Academy of Grassland Science, Chengdu, Sichuan, 611731, China
| | - Chang-Bing Zhang
- Sichuan Academy of Grassland Science, Chengdu, Sichuan, 611731, China
| | - Zhi-Hui Tian
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University, Chengdu, 610065, Sichuan, China
| | - Ming-Hong You
- Sichuan Academy of Grassland Science, Chengdu, Sichuan, 611731, China
| | - Shi-Qie Bai
- Sichuan Academy of Grassland Science, Chengdu, Sichuan, 611731, China.
| | - Hong-Hui Lin
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University, Chengdu, 610065, Sichuan, China.
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Lu X, Fang Y, Tian B, Tong T, Wang J, Wang H, Cai S, Hu J, Zeng D, Xu H, Zhang X, Xue D. Genetic variation of HvXYN1 associated with endoxylanase activity and TAX content in barley (Hordeum vulgare L.). BMC PLANT BIOLOGY 2019; 19:170. [PMID: 31039733 PMCID: PMC6492322 DOI: 10.1186/s12870-019-1747-5] [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: 10/09/2018] [Accepted: 03/29/2019] [Indexed: 05/16/2023]
Abstract
BACKGROUND Endo-β-1,4-xylanase1 (EA), the key endoxylanase in plants, is involved in the degradation of arabinoxylan during grain germination. In barley (Hordeum vulgare L.), one gene (HvXYN-1) that encode a endo-beta-1,4-xylanase, has been cloned. However, the single nucleotide polymorphisms (SNPs) that affect the endoxylanase activity and total arabinoxylan (TAX) content have yet to be characterized. The investigation of genetic variation in HvXYN1 may facilitate a better understanding of the relationship between TAX content and EA activity in barley. RESULTS In the current study, 56 polymorphisms were detected in HvXYN1 among 210 barley accessions collected from 34 countries, with 10 distinct haplotypes identified. The SNPs at positions 110, 305, 1045, 1417, 1504, 1597, 1880 bp in the genomic region of HvXYN1 were significantly associated with EA activity (P < 0.0001), and the sites 110, 305, and 1045 were highly significantly associated with TAX content. The amount of phenotypic variation in a given trait explained by each associated polymorphism ranged from 6.96 to 9.85%. Most notably, we found two variants at positions 1504 bp and 1880 bp in the second exon that significantly (P < 0.0001) affected EA activity; this result could be used in breeding programs to improve beer quality. In addition, African accessions had the highest EA activity and TAX content, and the richest germplasm resources were from Asia, indicating the high potential value of Asian barley. CONCLUSION This study provided insight into understanding the relationship, EA activity, TAX content with the SNPs of HvXYN1 in barley. These SNPs can be applied as DNA markers in breeding programs to improve the quality of barley for beer brewing after further validation.
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Affiliation(s)
- Xueli Lu
- College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xiasha Road, Hangzhou, 310036, China
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyu Road, Hangzhou, 310006, China
| | - Yunxia Fang
- College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xiasha Road, Hangzhou, 310036, China
| | - Bin Tian
- College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xiasha Road, Hangzhou, 310036, China
| | - Tao Tong
- College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xiasha Road, Hangzhou, 310036, China
| | - Jiahui Wang
- College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xiasha Road, Hangzhou, 310036, China
| | - Hua Wang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Zhejiang Academy of Agricultural Science, 298 Deshengzhong Road, Hangzhou, 310021, China
| | - Shengguan Cai
- Agronomy Department, Key Laboratory of Crop Germplasm Resource of Zhejiang Province, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Jiang Hu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyu Road, Hangzhou, 310006, China
| | - Dali Zeng
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyu Road, Hangzhou, 310006, China
| | - Heng Xu
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Zhejiang Academy of Agricultural Science, 298 Deshengzhong Road, Hangzhou, 310021, China
| | - Xiaoqin Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xiasha Road, Hangzhou, 310036, China.
| | - Dawei Xue
- College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xiasha Road, Hangzhou, 310036, China.
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