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Scharte J, Hassa S, Herrfurth C, Feussner I, Forlani G, Weis E, von Schaewen A. Metabolic priming in G6PDH isoenzyme-replaced tobacco lines improves stress tolerance and seed yields via altering assimilate partitioning. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 116:1696-1716. [PMID: 37713307 DOI: 10.1111/tpj.16460] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 08/25/2023] [Accepted: 08/29/2023] [Indexed: 09/17/2023]
Abstract
We investigated the basis for better performance of transgenic Nicotiana tabacum plants with G6PDH-isoenzyme replacement in the cytosol (Xanthi::cP2::cytRNAi, Scharte et al., 2009). After six generations of selfing, infiltration of Phytophthora nicotianae zoospores into source leaves confirmed that defence responses (ROS, callose) are accelerated, showing as fast cell death of the infected tissue. Yet, stress-related hormone profiles resembled susceptible Xanthi and not resistant cultivar SNN, hinting at mainly metabolic adjustments in the transgenic lines. Leaves of non-stressed plants contained twofold elevated fructose-2,6-bisphosphate (F2,6P2 ) levels, leading to partial sugar retention (soluble sugars, starch) and elevated hexose-to-sucrose ratios, but also more lipids. Above-ground biomass lay in between susceptible Xanthi and resistant SNN, with photo-assimilates preferentially allocated to inflorescences. Seeds were heavier with higher lipid-to-carbohydrate ratios, resulting in increased harvest yields - also under water limitation. Abiotic stress tolerance (salt, drought) was improved during germination, and in floated leaf disks of non-stressed plants. In leaves of salt-watered plants, proline accumulated to higher levels during illumination, concomitant with efficient NADP(H) use and recycling. Non-stressed plants showed enhanced PSII-induction kinetics (upon dark-light transition) with little differences at the stationary phase. Leaf exudates contained 10% less sucrose, similar amino acids, but more fatty acids - especially in the light. Export of specific fatty acids via the phloem may contribute to both, earlier flowering and higher seed yields of the Xanthi-cP2 lines. Apparently, metabolic priming by F2,6P2 -combined with sustained NADP(H) turnover-bypasses the genetically fixed growth-defence trade-off, rendering tobacco plants more stress-resilient and productive.
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Affiliation(s)
- Judith Scharte
- Institut für Biologie und Biotechnologie der Pflanzen, Fachbereich Biologie, Universität Münster, Schlossplatz 7, D-48149, Münster, Germany
| | - Sebastian Hassa
- Institut für Biologie und Biotechnologie der Pflanzen, Fachbereich Biologie, Universität Münster, Schlossplatz 7, D-48149, Münster, Germany
| | - Cornelia Herrfurth
- Albrecht-von-Haller-Institut für Pflanzenwissenschaften and Göttinger Zentrum für Molekulare Biowissenschaften (GZMB), Abteilung Biochemie der Pflanze, Universität Göttingen, Justus-von-Liebig-Weg 11, D-37077, Göttingen, Germany
| | - Ivo Feussner
- Albrecht-von-Haller-Institut für Pflanzenwissenschaften and Göttinger Zentrum für Molekulare Biowissenschaften (GZMB), Abteilung Biochemie der Pflanze, Universität Göttingen, Justus-von-Liebig-Weg 11, D-37077, Göttingen, Germany
| | - Giuseppe Forlani
- Laboratorio di Fisiologia e Biochimica Vegetale, Dipartimento di Scienze della Vita e Biotecnologie, Universitá degli Studi di Ferrara, Via L. Borsari 46, I-44121, Ferrara, Italy
| | - Engelbert Weis
- Institut für Biologie und Biotechnologie der Pflanzen, Fachbereich Biologie, Universität Münster, Schlossplatz 7, D-48149, Münster, Germany
| | - Antje von Schaewen
- Institut für Biologie und Biotechnologie der Pflanzen, Fachbereich Biologie, Universität Münster, Schlossplatz 7, D-48149, Münster, Germany
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Ibrahim S, Ahmad N, Kuang L, Li K, Tian Z, Sadau SB, Tajo SM, Wang X, Wang H, Dun X. Transcriptome analysis reveals key regulatory genes for root growth related to potassium utilization efficiency in rapeseed ( Brassica napus L.). FRONTIERS IN PLANT SCIENCE 2023; 14:1194914. [PMID: 37546248 PMCID: PMC10400329 DOI: 10.3389/fpls.2023.1194914] [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: 03/27/2023] [Accepted: 07/03/2023] [Indexed: 08/08/2023]
Abstract
Root system architecture (RSA) is the primary predictor of nutrient intake and significantly influences potassium utilization efficiency (KUE). Uncertainty persists regarding the genetic factors governing root growth in rapeseed. The root transcriptome analysis reveals the genetic basis driving crop root growth. In this study, RNA-seq was used to profile the overall transcriptome in the root tissue of 20 Brassica napus accessions with high and low KUE. 71,437 genes in the roots displayed variable expression profiles between the two contrasting genotype groups. The 212 genes that had varied expression levels between the high and low KUE lines were found using a pairwise comparison approach. The Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) functional classification analysis revealed that the DEGs implicated in hormone and signaling pathways, as well as glucose, lipid, and amino acid metabolism, were all differently regulated in the rapeseed root system. Additionally, we discovered 33 transcription factors (TFs) that control root development were differentially expressed. By combining differential expression analysis, weighted gene co-expression network analysis (WGCNA), and recent genome-wide association study (GWAS) results, four candidate genes were identified as essential hub genes. These potential genes were located fewer than 100 kb from the peak SNPs of QTL clusters, and it was hypothesized that they regulated the formation of the root system. Three of the four hub genes' homologs-BnaC04G0560400ZS, BnaC04G0560400ZS, and BnaA03G0073500ZS-have been shown to control root development in earlier research. The information produced by our transcriptome profiling could be useful in revealing the molecular processes involved in the growth of rapeseed roots in response to KUE.
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Affiliation(s)
- Sani Ibrahim
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
- Department of Plant Biology, Faculty of Life Sciences, College of Natural and Pharmaceutical Sciences, Bayero University, Kano, Nigeria
| | - Nazir Ahmad
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Lieqiong Kuang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Keqi Li
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Ze Tian
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Salisu Bello Sadau
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (Institute of Cotton Research (ICR), CAAS), Anyang, China
| | - Sani Muhammad Tajo
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (Institute of Cotton Research (ICR), CAAS), Anyang, China
| | - Xinfa Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Hanzhong Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Xiaoling Dun
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
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Veličković D, Liao YC, Thibert S, Veličković M, Anderton C, Voglmeir J, Stacey G, Zhou M. Spatial Mapping of Plant N-Glycosylation Cellular Heterogeneity Inside Soybean Root Nodules Provided Insights Into Legume-Rhizobia Symbiosis. FRONTIERS IN PLANT SCIENCE 2022; 13:869281. [PMID: 35651768 PMCID: PMC9150855 DOI: 10.3389/fpls.2022.869281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 04/01/2022] [Indexed: 06/15/2023]
Abstract
Although ubiquitously present, information on the function of complex N-glycan posttranslational modification in plants is very limited and is often neglected. In this work, we adopted an enzyme-assisted matrix-assisted laser desorption/ionization mass spectrometry imaging strategy to visualize the distribution and identity of N-glycans in soybean root nodules at a cellular resolution. We additionally performed proteomics analysis to probe the potential correlation to proteome changes during symbiotic rhizobia-legume interactions. Our ion images reveal that intense N-glycosylation occurs in the sclerenchyma layer, and inside the infected cells within the infection zone, while morphological structures such as the cortex, uninfected cells, and cells that form the attachment with the root are fewer N-glycosylated. Notably, we observed different N-glycan profiles between soybean root nodules infected with wild-type rhizobia and those infected with mutant rhizobia incapable of efficiently fixing atmospheric nitrogen. The majority of complex N-glycan structures, particularly those with characteristic Lewis-a epitopes, are more abundant in the mutant nodules. Our proteomic results revealed that these glycans likely originated from proteins that maintain the redox balance crucial for proper nitrogen fixation, but also from enzymes involved in N-glycan and phenylpropanoid biosynthesis. These findings indicate the possible involvement of Lewis-a glycans in these critical pathways during legume-rhizobia symbiosis.
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Affiliation(s)
- Dušan Veličković
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, United States
| | - Yen-Chen Liao
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, United States
| | - Stephanie Thibert
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, United States
| | - Marija Veličković
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, United States
| | - Christopher Anderton
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, United States
| | - Josef Voglmeir
- Glycomics and Glycan Bioengineering Research Center, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Gary Stacey
- Divisions of Plant Sciences and Biochemistry, C. S. Bond Life Sciences Center, University of Missouri, Columbia, MO, United States
| | - Mowei Zhou
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, United States
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Strasser R. Recent Developments in Deciphering the Biological Role of Plant Complex N-Glycans. FRONTIERS IN PLANT SCIENCE 2022; 13:897549. [PMID: 35557740 PMCID: PMC9085483 DOI: 10.3389/fpls.2022.897549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 04/06/2022] [Indexed: 06/15/2023]
Abstract
Asparagine (N)-linked protein glycosylation is a ubiquitous co- and posttranslational modification which has a huge impact on the biogenesis and function of proteins and consequently on the development, growth, and physiology of organisms. In mammals, N-glycan processing carried out by Golgi-resident glycosidases and glycosyltransferases creates a number of structurally diverse N-glycans with specific roles in many different biological processes. In plants, complex N-glycan modifications like the attachment of β1,2-xylose, core α1,3-fucose, or the Lewis A-type structures are evolutionary highly conserved, but their biological function is poorly known. Here, I highlight recent developments that contribute to a better understanding of these conserved glycoprotein modifications and discuss future directions to move the field forward.
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Affiliation(s)
- Richard Strasser
- Department of Applied Genetics and Cell Biology, Institute of Plant Biotechnology and Cell Biology, University of Natural Resources and Life Sciences, Vienna, Austria
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Wang D, Zhang Z, Yang L, Tian S, Liu Y. ARPI, β-AS, and UGE regulate glycyrrhizin biosynthesis in Glycyrrhiza uralensis hairy roots. PLANT CELL REPORTS 2021; 40:1285-1296. [PMID: 34002270 DOI: 10.1007/s00299-021-02712-6] [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: 04/01/2021] [Accepted: 05/08/2021] [Indexed: 06/12/2023]
Abstract
ARPI, β-AS, and UGE were cloned from G. uralensis and their regulatory effects on glycyrrhizin biosynthesis were investigated. β-AS and UGE but not ARPI positively regulate the biosynthesis of glycyrrhizin. Glycyrrhiza uralensis Fisch. has been used to treat respiratory, gastric, and liver diseases since ancient China. The most important and widely studied active component in G. uralensis is glycyrrhizin (GC). Our pervious RNA-Seq study shows that GC biosynthesis is regulated by multiple biosynthetic pathways. In this study, three target genes, ARPI, β-AS, and UGE from different pathways were selected and their regulatory effects on GC biosynthesis were investigated using G. uralensis hairy roots. Our data show that hairy roots knocking out ARPI or UGE died soon after induction, indicating that the genes are essential for the growth of G. uralensis hairy roots. Hairy roots with β-AS knocked out grew healthily. However, they failed to produce GC, suggesting that β-AS is required for triterpenoid skeleton formation. Conversely, overexpression of UGE or β-AS significantly increased the GC content, whereas overexpression of ARPI had no obvious effects on GC accumulation in G. uralensis hairy roots. Our findings demonstrate that β-AS and UGE positively regulate the biosynthesis of GC.
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Affiliation(s)
- Doudou Wang
- School of Life Sciences, Beijing University of Chinese Medicine, Yangguang South Street, Fangshan District, Beijing, 102401, China
| | - Zhixin Zhang
- School of Life Sciences, Beijing University of Chinese Medicine, Yangguang South Street, Fangshan District, Beijing, 102401, China
| | - Lin Yang
- School of Life Sciences, Beijing University of Chinese Medicine, Yangguang South Street, Fangshan District, Beijing, 102401, China
| | - Shaokai Tian
- School of Life Sciences, Beijing University of Chinese Medicine, Yangguang South Street, Fangshan District, Beijing, 102401, China
| | - Ying Liu
- School of Life Sciences, Beijing University of Chinese Medicine, Yangguang South Street, Fangshan District, Beijing, 102401, China.
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De Coninck T, Gistelinck K, Janse van Rensburg HC, Van den Ende W, Van Damme EJM. Sweet Modifications Modulate Plant Development. Biomolecules 2021; 11:756. [PMID: 34070047 PMCID: PMC8158104 DOI: 10.3390/biom11050756] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 04/28/2021] [Accepted: 05/12/2021] [Indexed: 02/07/2023] Open
Abstract
Plant development represents a continuous process in which the plant undergoes morphological, (epi)genetic and metabolic changes. Starting from pollination, seed maturation and germination, the plant continues to grow and develops specialized organs to survive, thrive and generate offspring. The development of plants and the interplay with its environment are highly linked to glycosylation of proteins and lipids as well as metabolism and signaling of sugars. Although the involvement of these protein modifications and sugars is well-studied, there is still a long road ahead to profoundly comprehend their nature, significance, importance for plant development and the interplay with stress responses. This review, approached from the plants' perspective, aims to focus on some key findings highlighting the importance of glycosylation and sugar signaling for plant development.
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Affiliation(s)
- Tibo De Coninck
- Laboratory of Glycobiology & Biochemistry, Department of Biotechnology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium; (T.D.C.); (K.G.)
| | - Koen Gistelinck
- Laboratory of Glycobiology & Biochemistry, Department of Biotechnology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium; (T.D.C.); (K.G.)
| | - Henry C. Janse van Rensburg
- Laboratory of Molecular Plant Biology, Department of Biology, KU Leuven, Kasteelpark Arenberg 31, B-3001 Leuven, Belgium; (H.C.J.v.R.); (W.V.d.E.)
| | - Wim Van den Ende
- Laboratory of Molecular Plant Biology, Department of Biology, KU Leuven, Kasteelpark Arenberg 31, B-3001 Leuven, Belgium; (H.C.J.v.R.); (W.V.d.E.)
| | - Els J. M. Van Damme
- Laboratory of Glycobiology & Biochemistry, Department of Biotechnology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium; (T.D.C.); (K.G.)
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Kaulfürst-Soboll H, Mertens-Beer M, Brehler R, Albert M, von Schaewen A. Complex N-Glycans Are Important for Normal Fruit Ripening and Seed Development in Tomato. FRONTIERS IN PLANT SCIENCE 2021; 12:635962. [PMID: 33767719 PMCID: PMC7985349 DOI: 10.3389/fpls.2021.635962] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 01/25/2021] [Indexed: 05/09/2023]
Abstract
Complex N-glycan modification of secretory glycoproteins in plants is still not well understood. Essential in animals, where a lack of complex N-glycans is embryo-lethal, their presence in plants seemed less relevant for a long time mostly because Arabidopsis thaliana cgl1 mutants lacking N-acetyl-glucosaminyltransferase I (GNTI, the enzyme initiating complex N-glycan maturation in the Golgi apparatus) are viable and showed only minor impairments regarding stress tolerance or development. A different picture emerged when a rice (Oryza sativa) gntI T-DNA mutant was found to be unable to reach the reproductive stage. Here, we report on tomato (Solanum lycopersicum) lines that showed severe impairments upon two RNA interference (RNAi) approaches. Originally created to shed light on the role of core α1,3-fucose and β1,2-xylose residues in food allergy, plants with strongly reduced GNTI activity developed necrotic fruit-attached stalks and early fruit drop combined with patchy incomplete ripening. Correspondingly, semiquantitative RT-PCR of the abscission zone (az) revealed an increase of abscission markers. Also, GNTI-RNA interference (RNAi) plants were more susceptible to sporadic infection. To obtain vital tomatoes with comparable low allergenic potential, Golgi α-mannosidase II (MANII) was chosen as the second target. The resulting phenotypes were oppositional: MANII-reduced plants carried normal-looking fruits that remained attached for extended time without signs of necrosis. Fruits contained no or only few, but enlarged, seeds. Furthermore, leaves developed rolled-up rims simultaneously during the reproductive stage. Trials to cross MANII-reduced plants failed, while GNTI-reduced plants could be (back-)crossed, retaining their characteristic phenotype. This phenotype could not be overcome by ethephon or indole-3-acetic acid (IAA) application, but the latter was able to mimic patchy fruit ripening in wild-type. Phytohormones measured in leaves and 1-aminocyclopropane-1-carboxylic acid (ACC) contents in fruits showed no significant differences. Together, the findings hint at altered liberation/perception of protein-bound N-glycans, known to trigger auxin-like effects. Concomitantly, semiquantitative RT-PCR analysis revealed differences in auxin-responsive genes, indicating the importance of complex N-glycan modification for hormone signaling/crosstalk. Another possible role of altered glycoprotein life span seems subordinate, as concluded from transient expression of Arabidopsis KORRIGAN KOR1-GFP fusion proteins in RNAi plants of Nicotiana benthamiana. In summary, our analyses stress the importance of complex N-glycan maturation for normal plant responses, especially in fruit-bearing crops like tomato.
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Affiliation(s)
| | | | - Randolf Brehler
- Department of Dermatology, University of Münster, Münster, Germany
| | - Markus Albert
- Molekulare Pflanzenphysiologie, Department Biologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Antje von Schaewen
- Institute of Plant Biology and Biotechnology, University of Münster, Münster, Germany
- *Correspondence: Antje von Schaewen, ;
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