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Arshad W, Steinbrecher T, Wilhelmsson PK, Fernandez-Pozo N, Pérez M, Mérai Z, Rensing SA, Chandler JO, Leubner-Metzger G. Aethionema arabicum dimorphic seed trait resetting during transition to seedlings. FRONTIERS IN PLANT SCIENCE 2024; 15:1358312. [PMID: 38525145 PMCID: PMC10957558 DOI: 10.3389/fpls.2024.1358312] [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: 12/19/2023] [Accepted: 02/19/2024] [Indexed: 03/26/2024]
Abstract
The transition from germinating seeds to emerging seedlings is one of the most vulnerable plant life cycle stages. Heteromorphic diaspores (seed and fruit dispersal units) are an adaptive bet-hedging strategy to cope with spatiotemporally variable environments. While the roles and mechanisms of seedling traits have been studied in monomorphic species, which produce one type of diaspore, very little is known about seedlings in heteromorphic species. Using the dimorphic diaspore model Aethionema arabicum (Brassicaceae), we identified contrasting mechanisms in the germination responses to different temperatures of the mucilaginous seeds (M+ seed morphs), the dispersed indehiscent fruits (IND fruit morphs), and the bare non-mucilaginous M- seeds obtained from IND fruits by pericarp (fruit coat) removal. What follows the completion of germination is the pre-emergence seedling growth phase, which we investigated by comparative growth assays of early seedlings derived from the M+ seeds, bare M- seeds, and IND fruits. The dimorphic seedlings derived from M+ and M- seeds did not differ in their responses to ambient temperature and water potential. The phenotype of seedlings derived from IND fruits differed in that they had bent hypocotyls and their shoot and root growth was slower, but the biomechanical hypocotyl properties of 15-day-old seedlings did not differ between seedlings derived from germinated M+ seeds, M- seeds, or IND fruits. Comparison of the transcriptomes of the natural dimorphic diaspores, M+ seeds and IND fruits, identified 2,682 differentially expressed genes (DEGs) during late germination. During the subsequent 3 days of seedling pre-emergence growth, the number of DEGs was reduced 10-fold to 277 root DEGs and 16-fold to 164 shoot DEGs. Among the DEGs in early seedlings were hormonal regulators, in particular for auxin, ethylene, and gibberellins. Furthermore, DEGs were identified for water and ion transporters, nitrate transporter and assimilation enzymes, and cell wall remodeling protein genes encoding enzymes targeting xyloglucan and pectin. We conclude that the transcriptomes of seedlings derived from the dimorphic diaspores, M+ seeds and IND fruits, undergo transcriptional resetting during the post-germination pre-emergence growth transition phase from germinated diaspores to growing seedlings.
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Affiliation(s)
- Waheed Arshad
- Seed Biology and Technology Group, Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
| | - Tina Steinbrecher
- Seed Biology and Technology Group, Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
| | | | - Noe Fernandez-Pozo
- Plant Cell Biology, Faculty of Biology, University of Marburg, Marburg, Germany
- Department Plant Breeding and Physiology, Institute for Mediterranean and Subtropical Horticulture “La Mayora” (IHSM-CSIC-UMA), Málaga, Spain
| | - Marta Pérez
- Seed Biology and Technology Group, Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
| | - Zsuzsanna Mérai
- Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna Biocenter (VBC), Vienna, Austria
| | - Stefan A. Rensing
- Plant Cell Biology, Faculty of Biology, University of Marburg, Marburg, Germany
- Centre for Biological Signalling Studies (BIOSS), University of Freiburg, Freiburg, Germany
- Faculty of Chemistry and Pharmacy, University of Freiburg, Freiburg, Germany
| | - Jake O. Chandler
- Seed Biology and Technology Group, Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
| | - Gerhard Leubner-Metzger
- Seed Biology and Technology Group, Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany, Czech Academy of Sciences, Olomouc, Czechia
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Pan H, Sun Y, Qiao M, Qi H. Beta-galactosidase gene family genome-wide identification and expression analysis of members related to fruit softening in melon (Cucumis melo L.). BMC Genomics 2022; 23:795. [PMID: 36460944 PMCID: PMC9716742 DOI: 10.1186/s12864-022-09006-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 11/10/2022] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Texture quality is impotent for melon (Cucumis melo L.) fruit. β-galactosidase (β-Gal, EC 3.2.1.23) is an important cell wall glycosyl hydrolase involved in fruit softening, However, the β-Gal gene (BGALs) family hasn't been identified genome-wide in melon. Thus, it's necessary to conduct an in-depth bioinformatic analysis on melon BGALs family and to seek out the key members who participated in melon fruit softening. RESULTS A total of 21 BGALs members designated as CmBGAL1-CmBGAL21 were identified genome-wide in melon, clustered into A-G seven clades. Among them, three duplications CmBGAL1:CmBGAL3, CmBGAL19:CmBGAL21, and CmBGAL20:CmBGAL21 happened. For conserved domains, besides the Glyco_hydro_35 domain (PF01301), all the members also contained the GHD domain (PF17834) except for CmBGAL12, and the Gal_Lectin (PF02140) domain existed in most CmBGALs at the C-termini. Motifs, protein secondary and tertiary structure analysis showed that the CmBGAL12 is a unique member. Moreover, protein-protein association network analysis showed that the CmBGAL12 is the only node protein. Furthermore, spatiotemporal expression pattern analysis by quantitative real-time PCR (qRT-PCR) suggested that most of CmBGALs expressed in tissues with vigorous cell wall remodeling/disassembly. In addition, cis-acting regulatory elements analysis in promoters inferred that CmBGALs might participate in diverse responsiveness to phytohormone, biotic and abiotic signaling. CONCLUSIONS A novel clade of CmBGAL members (Clade F) related to melon fruit softening was discovered, since their expression showed a specific surge in the mature fruit of 'HPM' with mealy texture (softening sharply), but not in 'HDB' with crisp texture (softening bluntly). The homologous CmBGAL7-11 in Clade F exhibited identical spatiotemporal expression patterns may multiple genes leading to melon fruit softening.
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Affiliation(s)
- Haobin Pan
- grid.412557.00000 0000 9886 8131College of Horticulture, Shenyang Agricultural University, No.120 Dongling Road, Shenhe District, Shenyang, Liaoning 110866 People’s Republic of China ,Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, Shenyang, Liaoning 110866 People’s Republic of China ,Northern National & Local Joint Engineering Research Center of Horticultural Facilities Design and Application Technology (Liaoning), Shenyang, Liaoning 110866 People’s Republic of China
| | - Yinhan Sun
- grid.412557.00000 0000 9886 8131College of Horticulture, Shenyang Agricultural University, No.120 Dongling Road, Shenhe District, Shenyang, Liaoning 110866 People’s Republic of China ,Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, Shenyang, Liaoning 110866 People’s Republic of China ,Northern National & Local Joint Engineering Research Center of Horticultural Facilities Design and Application Technology (Liaoning), Shenyang, Liaoning 110866 People’s Republic of China
| | - Miaomiao Qiao
- grid.412557.00000 0000 9886 8131College of Horticulture, Shenyang Agricultural University, No.120 Dongling Road, Shenhe District, Shenyang, Liaoning 110866 People’s Republic of China ,Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, Shenyang, Liaoning 110866 People’s Republic of China ,Northern National & Local Joint Engineering Research Center of Horticultural Facilities Design and Application Technology (Liaoning), Shenyang, Liaoning 110866 People’s Republic of China
| | - Hongyan Qi
- grid.412557.00000 0000 9886 8131College of Horticulture, Shenyang Agricultural University, No.120 Dongling Road, Shenhe District, Shenyang, Liaoning 110866 People’s Republic of China ,Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, Shenyang, Liaoning 110866 People’s Republic of China ,Northern National & Local Joint Engineering Research Center of Horticultural Facilities Design and Application Technology (Liaoning), Shenyang, Liaoning 110866 People’s Republic of China
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Kanapin A, Rozhmina T, Bankin M, Surkova S, Duk M, Osyagina E, Samsonova M. Genetic Determinants of Fiber-Associated Traits in Flax Identified by Omics Data Integration. Int J Mol Sci 2022; 23:14536. [PMID: 36498863 PMCID: PMC9738745 DOI: 10.3390/ijms232314536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/10/2022] [Accepted: 11/15/2022] [Indexed: 11/23/2022] Open
Abstract
In this paper, we explore potential genetic factors in control of flax phenotypes associated with fiber by mining a collection of 306 flax accessions from the Federal Research Centre of the Bast Fiber Crops, Torzhok, Russia. In total, 11 traits were assessed in the course of 3 successive years. A genome-wide association study was performed for each phenotype independently using six different single-locus models implemented in the GAPIT3 R package. Moreover, we applied a multivariate linear mixed model implemented in the GEMMA package to account for trait correlations and potential pleiotropic effects of polymorphisms. The analyses revealed a number of genomic variants associated with different fiber traits, implying the complex and polygenic control. All stable variants demonstrate a statistically significant allelic effect across all 3 years of the experiment. We tested the validity of the predicted variants using gene expression data available for the flax fiber studies. The results shed new light on the processes and pathways associated with the complex fiber traits, while the pinpointed candidate genes may be further used for marker-assisted selection.
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Affiliation(s)
- Alexander Kanapin
- Centre for Computational Biology, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Tatyana Rozhmina
- Laboratory of Breeding Technologies, Federal Research Center for Bast Fiber Crops, 172002 Torzhok, Russia
| | - Mikhail Bankin
- Mathematical Biology & Bioinformatics Laboratory, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Svetlana Surkova
- Mathematical Biology & Bioinformatics Laboratory, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Maria Duk
- Mathematical Biology & Bioinformatics Laboratory, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
- Theoretical Department, Ioffe Institute, 194021 St. Petersburg, Russia
| | - Ekaterina Osyagina
- Mathematical Biology & Bioinformatics Laboratory, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Maria Samsonova
- Mathematical Biology & Bioinformatics Laboratory, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
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Conjunctive Analyses of BSA-Seq and BSR-Seq Unveil the Msβ-GAL and MsJMT as Key Candidate Genes for Cytoplasmic Male Sterility in Alfalfa (Medicago sativa L.). Int J Mol Sci 2022; 23:ijms23137172. [PMID: 35806189 PMCID: PMC9266382 DOI: 10.3390/ijms23137172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/21/2022] [Accepted: 06/25/2022] [Indexed: 11/17/2022] Open
Abstract
Knowing the molecular mechanism of male sterility in alfalfa is important to utilize the heterosis more effectively. However, the molecular mechanisms of male sterility in alfalfa are still unclear. In this study, the bulked segregant analysis (BSA) and bulked segregant RNA-seq (BSR) were performed with F2 separation progeny to study the molecular mechanism of male sterility in alfalfa. The BSA-seq analysis was located in a candidate region on chromosome 5 containing 626 candidate genes which were associated with male sterility in alfalfa, while the BSR-seq analysis filtered seven candidate DEGs related to male sterility, and these candidate genes including EF-Tu, β-GAL, CESA, PHGDH, and JMT. The conjunctive analyses of BSR and BSA methods revealed that the genes of Msβ-GAL and MsJMT are the common detected candidate genes involved in male sterility in alfalfa. Our research provides a theory basis for further study of the molecular mechanism of male sterility in alfalfa and significant information for the genetic breeding of Medicago sativa.
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Krzewska M, Dubas E, Gołębiowska G, Nowicka A, Janas A, Zieliński K, Surówka E, Kopeć P, Mielczarek P, Żur I. Comparative proteomic analysis provides new insights into regulation of microspore embryogenesis induction in winter triticale (× Triticosecale Wittm.) after 5-azacytidine treatment. Sci Rep 2021; 11:22215. [PMID: 34782682 PMCID: PMC8593058 DOI: 10.1038/s41598-021-01671-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 11/02/2021] [Indexed: 11/09/2022] Open
Abstract
Effective microspore embryogenesis (ME) requires substantial modifications in gene expression pattern, followed by changes in the cell proteome and its metabolism. Recent studies have awakened also interest in the role of epigenetic factors in microspore de-differentiation and reprogramming. Therefore, demethylating agent (2.5-10 μM 5-azacytidine, AC) together with low temperature (3 weeks at 4 °C) were used as ME-inducing tiller treatment in two doubled haploid (DH) lines of triticale and its effect was analyzed in respect of anther protein profiles, expression of selected genes (TAPETUM DETERMINANT1 (TaTPD1-like), SOMATIC EMBRYOGENESIS RECEPTOR KINASE 2 (SERK2) and GLUTATHIONE S-TRANSFERASE (GSTF2)) and ME efficiency. Tiller treatment with 5.0 µM AC was the most effective in ME induction; it was associated with (1) suppression of intensive anabolic processes-mainly photosynthesis and light-dependent reactions, (2) transition to effective catabolism and mobilization of carbohydrate reserve to meet the high energy demand of cells during microspore reprograming and (3) effective defense against stress-inducing treatment, i.e. protection of proper folding during protein biosynthesis and effective degradation of dysfunctional or damaged proteins. Additionally, 5.0 µM AC enhanced the expression of all genes previously identified as being associated with embryogenic potential of microspores (TaTPD1-like, SERK and GSTF2).
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Affiliation(s)
- Monika Krzewska
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland.
| | - Ewa Dubas
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
| | - Gabriela Gołębiowska
- Chair of Genetics, Institute of Biology, Pedagogical University of Krakow, Podchorążych 2, 31-084, Kraków, Poland
| | - Anna Nowicka
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
- Institute of Experimental Botany of the Czech Academy of Sciences, Centre of the Region Haná for Biotechnological and Agricultural Research, Šlechtitelů 31, 779 00, Olomouc, Czech Republic
| | - Agnieszka Janas
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
| | - Kamil Zieliński
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
| | - Ewa Surówka
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
| | - Przemysław Kopeć
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
| | - Przemysław Mielczarek
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30 ave., 30-059, Kraków, Poland
| | - Iwona Żur
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland.
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Genome-Wide Analysis of Glycoside Hydrolase Family 35 Genes and Their Potential Roles in Cell Wall Development in Medicago truncatula. PLANTS 2021; 10:plants10081639. [PMID: 34451684 PMCID: PMC8401519 DOI: 10.3390/plants10081639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/19/2021] [Accepted: 07/28/2021] [Indexed: 11/25/2022]
Abstract
Plant β-galactosidases (BGAL) function in various cell wall biogeneses and modifications, and they belong to the glycoside hydrolase family. However, the roles of BGAL family members in Medicago truncatula cell wall remodeling remain unclear. In this study, a total of 25 MtBGAL members of the glycoside hydrolase gene family 35 were identified, and they were clustered into nine sub-families. Many cis-acting elements possibly related to MeJA and abscisic acid responses were identified in the promoter region of the MtBGAL genes. Transcript analyses showed that these MtBGAL genes exhibited distinct expression patterns in various tissues and developing stem internodes. Furthermore, a stem-specific expression module associated with cell wall metabolic pathways was identified by weighted correlation network analysis (WGCNA). In particular, MtBGAL1 and MtBGAL23 within the stem-specific expression module were highly expressed in mature stems. In addition, several genes involved in lignin, cellulose, hemicellulose and pectin pathways were co-expressed with MtBGAL1 and MtBGAL23. It was also found that MtBGAL1 and MtBGAL23 were localized to the cell wall at the subcellular level, indicating their roles in the modification of cell wall metabolites in Medicago. As a whole, these results will be useful for further functional characterization and utilization of BGAL genes in cell wall modifications aiming to improve the quality of legume forage crops.
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Wei C, Zhang R, Yue Z, Yan X, Cheng D, Li J, Li H, Zhang Y, Ma J, Yang J, Zhang X. The impaired biosynthetic networks in defective tapetum lead to male sterility in watermelon. J Proteomics 2021; 243:104241. [PMID: 33905954 DOI: 10.1016/j.jprot.2021.104241] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/18/2021] [Accepted: 04/18/2021] [Indexed: 12/25/2022]
Abstract
Heterosis has been widely applied in watermelon breeding, because of the higher resistance and yield of hybrid. As the basis of heterosis utilization, genic male sterility (GMS) is an important tool for facilitating hybrid seed production, while the detailed mechanism in watermelon is still largely unknown. Here, we report a spontaneous mutant Se18 exhibited complete male sterility due to the uniquely multilayered tapetum and the un-meiotic pollen mother cells during pollen development. Using TMT based quantitative proteomic analyses, a total of 348 differentially abundant proteins (DAPs) were detected with the overwhelming majority down-regulated in mutant Se18. By analyzing the putative orthologs/homologs of Arabidopsis GMS related genes, the biosynthesis and transport of sporopollenin and tryphine precursors were predictably altered in mutant compared to its sibling wild type. Moreover, the general phenylpropanoid pathway as well as its related metabolisms was also expectably impaired in mutant, coincident with the pale yellow petals. Notably, some key transcriptional factors regulating tapetum development, together with their down-regulated targets, offered potentially valuable candidates regarding of male sterility. Collectively, the disrupted regulatory networks underlying male sterility of watermelon was proposed, which provide novel insights into genetic mechanism of male reproductive process and rich gene resources for future research. SIGNIFICANCE: Watermelon is an importantly economical cucurbit crop worldwide, with high nutritional value. Although several male sterile mutants have been identified in watermelon, the underlying molecular mechanism is poorly elucidated. Comparative cytological analysis revealed that the defective development of tapetum was responsible for male sterility in mutant Se18. Combined with the morphological comparison, male floral buds at 2.0-2.5 mm in diameter were confirmed with no obvious phenotypic differences but distinct cytological defects, which were in turn sampled for TMT based proteomic analyses. Referring to functionally characterized GMS related genes, the genetic pathway DYT1-TDF1-AMS-MS188-MS1 regulating tapetum development, together with some downstream targets, were considerably altered in mutant Se18. Moreover, enrichment analyses illustrated the general phenylpropanoid related metabolisms, as well as the biosynthesis and transport of sporopollenin and tryphine precursors, were significantly disrupted in defective anther development. Collectively, the proposed regulatory networks in watermelon not only contribute to a better understanding of molecular mechanisms underlying male sterility, but also provide valuable GMS related candidates for future researches.
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Affiliation(s)
- Chunhua Wei
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Ruimin Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhen Yue
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xing Yan
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Denghu Cheng
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jiayue Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hao Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yong Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jianxiang Ma
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jianqiang Yang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xian Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Vegetable Germplasm Innovation, Tianjin 300384, China.
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Moneo-Sánchez M, Alonso-Chico A, Knox JP, Dopico B, Labrador E, Martín I. β-(1,4)-Galactan remodelling in Arabidopsis cell walls affects the xyloglucan structure during elongation. PLANTA 2019; 249:351-362. [PMID: 30206696 DOI: 10.1007/s00425-018-3008-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 09/07/2018] [Indexed: 05/10/2023]
Abstract
Galactan turnover occurs during cell elongation and affects the cell wall xyloglucan structure which is involved in the interaction between cellulose and xyloglucan. β-(1,4)-Galactan is one of the main side chains of rhamnogalacturonan I. Although the specific function of this polymer has not been completely established, it has been related to different developmental processes. To study β-(1,4)-galactan function, we have generated transgenic Arabidopsis plants overproducing chickpea βI-Gal β-galactosidase under the 35S CaMV promoter (35S::βI-Gal) to reduce galactan side chains in muro. Likewise, an Arabidopsis double loss-of-function mutant for BGAL1 and BGAL3 Arabidopsis β-galactosidases (bgal1/bgal3) has been obtained to increase galactan levels. The characterization of these plants has confirmed the role of β-(1,4)-galactan in cell growth, and demonstrated that the turnover of this pectic side chain occurs during cell elongation, at least in Arabidopsis etiolated hypocotyls and floral stem internodes. The results indicate that BGAL1 and BGAL3 β-galactosidases act in a coordinate way during cell elongation. In addition, this work indicates that galactan plays a role in the maintenance of the cell wall architecture during this process. Our results point to an involvement of the β-(1,4)-galactan in the xyloglucan structure and the interaction between cellulose and xyloglucan.
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Affiliation(s)
- María Moneo-Sánchez
- Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), Dpto de Botánica y Fisiología Vegetal, Facultad de Biología, Universidad de Salamanca, Campus Miguel de Unamuno, 37007, Salamanca, Spain
| | - Alejandro Alonso-Chico
- Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), Dpto de Botánica y Fisiología Vegetal, Facultad de Biología, Universidad de Salamanca, Campus Miguel de Unamuno, 37007, Salamanca, Spain
| | - J Paul Knox
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Berta Dopico
- Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), Dpto de Botánica y Fisiología Vegetal, Facultad de Biología, Universidad de Salamanca, Campus Miguel de Unamuno, 37007, Salamanca, Spain
| | - Emilia Labrador
- Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), Dpto de Botánica y Fisiología Vegetal, Facultad de Biología, Universidad de Salamanca, Campus Miguel de Unamuno, 37007, Salamanca, Spain.
| | - Ignacio Martín
- Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), Dpto de Botánica y Fisiología Vegetal, Facultad de Biología, Universidad de Salamanca, Campus Miguel de Unamuno, 37007, Salamanca, Spain
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Satya P, Chakraborty A, Sarkar D, Karan M, Das D, Mandal NA, Saha D, Datta S, Ray S, Kar CS, Karmakar PG, Mitra J, Singh NK. Transcriptome profiling uncovers β-galactosidases of diverse domain classes influencing hypocotyl development in jute (Corchorus capsularis L.). PHYTOCHEMISTRY 2018; 156:20-32. [PMID: 30172937 DOI: 10.1016/j.phytochem.2018.08.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 07/21/2018] [Accepted: 08/21/2018] [Indexed: 05/25/2023]
Abstract
Enzyme β-galactosidase (EC 3.2.1.23) is known to influence vascular differentiation during early vegetative growth of plants, but its role in hypocotyl development is not yet fully understood. We generated the hypocotyl transcriptome data of a hypocotyl-defect jute (Corchorus capsularis L.) mutant (52,393 unigenes) and its wild-type (WT) cv. JRC-212 (44,720 unigenes) by paired-end RNA-seq and identified 11 isoforms of β-galactosidase, using a combination of sequence annotation, domain identification and structural-homology modeling. Phylogenetic analysis classified the jute β-galactosidases into six subfamilies of glycoside hydrolase-35 family, which are closely related to homologs from Malvaceous species. We also report here the expression of a β-galactosidase of glycoside hydrolase-2 family that was earlier considered to be absent in higher plants. Comparative analysis of domain structure allowed us to propose a domain-centric evolution of the five classes of plant β-galactosidases. Further, we observed 1.8-12.2-fold higher expression of nine β-galactosidase isoforms in the mutant hypocotyl, which was characterized by slower growth, undulated shape and deformed cell wall. In vitro and in vivo β-galactosidase activities were also higher in the mutant hypocotyl. Phenotypic analysis supported a significant (P ≤ 0.01) positive correlation between enzyme activity and undulated hypocotyl. Taken together, our study identifies the complete set of β-galactosidases expressed in the jute hypocotyl, and provides compelling evidence that they may be involved in cell wall degradation during hypocotyl development.
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Affiliation(s)
- Pratik Satya
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India.
| | - Avrajit Chakraborty
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Debabrata Sarkar
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Maya Karan
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Debajeet Das
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Nur Alam Mandal
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Dipnarayan Saha
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Subhojit Datta
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Soham Ray
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Chandan Sourav Kar
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Pran Gobinda Karmakar
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Jiban Mitra
- ICAR-Central Research Institute for Jute and Allied Fibres, Nilganj, Barrackpore, Kolkata, 700 120, West Bengal, India
| | - Nagendra Kumar Singh
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110 012, India
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