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Huang J, Xu J, Wu R, Wang J, Yang J, Li Y, Wang B, Xiong W, Guo Y. Influence of Cuticular Waxes from Triticale on Rumen Fermentation: A Metabolomic and Microbiome Profiling Study. J Agric Food Chem 2024; 72:1592-1606. [PMID: 38198510 DOI: 10.1021/acs.jafc.3c07416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
Cuticular wax, a critical defense layer for plants, remains a relatively unexplored factor in rumen fermentation. We investigated the impact of cuticular wax on rumen fermentation using triticale as a model. In total, six wax classes were identified, including fatty acids, aldehydes, alkane, primary alcohol, alkyresorcinol, and β-diketone, with low-bloom lines predominated by 46.05% of primary alcohols and high-bloom lines by 35.64% of β-diketone. Low-wax addition (2.5 g/kg DM) increased the gas production by 19.25% (P < 0.05) and total volatile fatty acids by 6.34% (P > 0.05), and enriched key carbohydrate-fermenting rumen microbes like Saccharofermentans, Ruminococcus, and Prevotellaceae, when compared to non-wax groups. Metabolites linked to nucleotide metabolism, purine metabolism, and protein/fat digestion in the rumen showed a positive correlation with low-wax, benefiting rumen microbes. This study highlights the intricate interplay among cuticular wax, rumen microbiota, fermentation, and metabolomics in forage digestion, providing insights into livestock nutrition and forage utilization.
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Affiliation(s)
- Jiahao Huang
- Qingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao 266109, P. R. China
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Jiawei Xu
- Qingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao 266109, P. R. China
- College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Ruixin Wu
- Dry-Land Farming Institute of Hebei Academy of Agricultural and Forestry Sciences, Hengshui 053000, P. R. China
| | - Jinjing Wang
- Qingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao 266109, P. R. China
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Jianfeng Yang
- Qingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao 266109, P. R. China
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Yuan Li
- Dry-Land Farming Institute of Hebei Academy of Agricultural and Forestry Sciences, Hengshui 053000, P. R. China
| | - Bo Wang
- Qingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao 266109, P. R. China
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Wangdan Xiong
- Qingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao 266109, P. R. China
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, P. R. China
- Academy of Dongying Efficient Agricultural Technology and Industry on Saline and Alkaline Land in Collaboration with Qingdao Agricultural University, Dongying 257091, P. R. China
| | - Yanjun Guo
- Qingdao Key Laboratory of Specialty Plant Germplasm Innovation and Utilization in Saline Soils of Coastal Beach, Qingdao Agricultural University, Qingdao 266109, P. R. China
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, P. R. China
- Academy of Dongying Efficient Agricultural Technology and Industry on Saline and Alkaline Land in Collaboration with Qingdao Agricultural University, Dongying 257091, P. R. China
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Michalski K, Hertig C, Mańkowski DR, Kumlehn J, Zimny J, Linkiewicz AM. Functional Validation of cas9/guideRNA Constructs for Site-Directed Mutagenesis of Triticale ABA8'OH1 loci. Int J Mol Sci 2021; 22:7038. [PMID: 34210100 PMCID: PMC8269138 DOI: 10.3390/ijms22137038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/24/2021] [Accepted: 06/27/2021] [Indexed: 12/02/2022] Open
Abstract
Cas endonuclease-mediated genome editing provides a long-awaited molecular biological approach to the modification of predefined genomic target sequences in living organisms. Although cas9/guide (g)RNA constructs are straightforward to assemble and can be customized to target virtually any site in the plant genome, the implementation of this technology can be cumbersome, especially in species like triticale that are difficult to transform, for which only limited genome information is available and/or which carry comparatively large genomes. To cope with these challenges, we have pre-validated cas9/gRNA constructs (1) by frameshift restitution of a reporter gene co-introduced by ballistic DNA transfer to barley epidermis cells, and (2) via transfection in triticale protoplasts followed by either a T7E1-based cleavage assay or by deep-sequencing of target-specific PCR amplicons. For exemplification, we addressed the triticale ABA 8'-hydroxylase 1 gene, one of the putative determinants of pre-harvest sprouting of grains. We further show that in-del induction frequency in triticalecan beincreased by TREX2 nuclease activity, which holds true for both well- and poorly performing gRNAs. The presented results constitute a sound basis for the targeted induction of heritable modifications in triticale genes.
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Affiliation(s)
- Krzysztof Michalski
- GMO Controlling Laboratory, Plant Biotechnology and Cytogenetics Department, Plant Breeding and Acclimatization Institute—National Research Institute, Radzików, 05-870 Błonie, Poland; (K.M.); (J.Z.)
| | - Christian Hertig
- Plant Reproductive Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466 Seeland, Germany; (J.K.); (C.H.)
| | - Dariusz R. Mańkowski
- Laboratory of Seed Production and Plant Breeding Economics, Department of Seed Science and Technology, Plant Breeding and Acclimatization Institute—National Research Institute, Radzików, 05-870 Błonie, Poland;
| | - Jochen Kumlehn
- Plant Reproductive Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), 06466 Seeland, Germany; (J.K.); (C.H.)
| | - Janusz Zimny
- GMO Controlling Laboratory, Plant Biotechnology and Cytogenetics Department, Plant Breeding and Acclimatization Institute—National Research Institute, Radzików, 05-870 Błonie, Poland; (K.M.); (J.Z.)
| | - Anna M. Linkiewicz
- GMO Controlling Laboratory, Plant Biotechnology and Cytogenetics Department, Plant Breeding and Acclimatization Institute—National Research Institute, Radzików, 05-870 Błonie, Poland; (K.M.); (J.Z.)
- Institute of Biological Sciences, Faculty of Biology and Environmental Sciences, Cardinal Stefan Wyszynski University in Warsaw, Wóycickiego 1/3 Street, 01-938 Warsaw, Poland
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Zaidi MA, O'Leary SJB, Gagnon C, Chabot D, Wu S, Hubbard K, Tran F, Sprott D, Hassan D, Vucurevich T, Sheedy C, Laroche A, Gleddie S, Robert LS. A triticale tapetal non-specific lipid transfer protein (nsLTP) is translocated to the pollen cell wall. Plant Cell Rep 2020; 39:1185-1197. [PMID: 32638075 DOI: 10.1007/s00299-020-02556-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 06/05/2020] [Indexed: 05/28/2023]
Abstract
A Triticeae type III non-specific lipid transfer protein (nsLTP) was shown for the first time to be translocated from the anther tapetum to the pollen cell wall. Two anther-expressed non-specific lipid transfer proteins (nsLTPs) were identified in triticale (× Triticosecale Wittmack). LTPc3a and LTPc3b contain a putative signal peptide sequence and eight cysteine residues in a C-Xn-C-Xn-CC-Xn-CXC-Xn-C-Xn-C pattern. These proteins belong to the type III class of nsLTPs which are expressed exclusively in the inflorescence of angiosperms. The level of LTPc3 transcript in the anther was highest at the tetrad and uninucleate microspore stages, and absent in mature pollen. In situ hybridization showed that LTPc3 was expressed in the tapetal layer of the developing triticale anther. The expression of the LTPc3 protein peaked at the uninucleate microspore stage, but was also found to be associated with the mature pollen. Accordingly, an LTPc3a::GFP translational fusion expressed in transgenic Brachypodium distachyon first showed activity in the tapetum, then in the anther locule, and later on the mature pollen grain. Altogether, these results represent the first detailed characterization of a Triticeae anther-expressed type III nsLTP with possible roles in pollen cell wall formation.
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Affiliation(s)
- Mohsin Abbas Zaidi
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
- Charlottetown Research and Development Centre, Agriculture and Agri-Food Canada, 440 University Avenue, Charlottetown, PE, C1A 4N6, Canada
| | - Stephen J B O'Leary
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
- Aquatic and Crop Resource Development Research Centre, National Research Council, of Canada, 1411 Oxford Street, Halifax, NS, B3H 3Z1, Canada
| | - Christine Gagnon
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
| | - Denise Chabot
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
| | - Shaobo Wu
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, 26 Huacai Road, Chengdu, 610052, Sichuan, China
| | - Keith Hubbard
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
| | - Frances Tran
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
- Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, 6000 C and E Trail, Lacombe, AB, T4L 1W1, Canada
| | - Dave Sprott
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
| | - Dhuha Hassan
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
| | - Tara Vucurevich
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, PO Box 3000, Lethbridge, AB, T1J 4B1, Canada
| | - Claudia Sheedy
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, PO Box 3000, Lethbridge, AB, T1J 4B1, Canada
| | - André Laroche
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, PO Box 3000, Lethbridge, AB, T1J 4B1, Canada
| | - Steve Gleddie
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
| | - Laurian S Robert
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada.
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Zong Y, Li G, Xi X, Sun X, Li S, Cao D, Zhang H, Liu B. A bHLH transcription factor TsMYC2 is associated with the blue grain character in triticale (Triticum × Secale). Plant Cell Rep 2019; 38:1291-1298. [PMID: 31352584 DOI: 10.1007/s00299-019-02449-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 07/17/2019] [Indexed: 05/22/2023]
Abstract
RNA-Seq was employed to compare the transcriptome differences between the triticale lines and to identify the key gene responsible for the blue aleurone trait. The accumulation of anthocyanins in the aleurone of triticale results in the formation of the blue-grained trait, but the identity of the genes associated with anthocyanin biosynthesis in the aleurone has not yet been reported. In this manuscript, RNA-Seq was employed to compare the transcriptome differences between the triticale lines HM13 (blue aleurone) and HM5 (white aleurone), and to identify the key genes responsible for the blue aleurone trait. There were 32,406 differentially expressed genes between HM13 and HM5. Seventy-three unigenes were homologous to the structural genes related to anthocyanin biosynthesis, and the average transcript level of the structural genes was higher in HM13 than in HM5, so that quantitative differences between the two lines in transcription rates could be the cause of the blue aleurone. The MYB and bHLH transcription factors had two homologous unigenes, but contained only one differentially expressed unigene each. The relative transcript level of bHLH Unigene5672_All (TsMYC2) in HM13 was 42.71 times that in HM5, while the relative transcript level of the MYB transcription factor Unigene12228_All in HM13 was 2.20 times that in HM5. qPCR experiments determined the relative transcript level of TsMYC2 in developing grain, with the expression of TsMYC2 in grain being the highest compared with that in root, stem or leaf tissue. TsMYC2 was homologous to the bHLH transcription factor regulating anthocyanin biosynthesis and contained three entire functional domains: bHLH-MYC_N, HLH and ACT-like, which were important for exercising regulation of anthocyanin biosynthesis as a bHLH transcription factor. Transient expression of ZmC1 and TsMYC2 could induce anthocyanin biosynthesis in white wheat coleoptile cells, demonstrating that TsMYC2 was a functional bHLH transcription factor. These results indicated that TsMYC2 was associated with the blue aleurone trait and could prove to be a valuable gene with which to breed new triticale cultivars with the blue aleurone trait.
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Affiliation(s)
- Yuan Zong
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 800010, Qinghai, China
| | - Guomin Li
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
| | - Xingyuan Xi
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
| | - Xuemei Sun
- Qinghai Key Laboratory of Genetics and Physiology of Vegetables, Qinghai University, Xining, 810008, Qinghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shiming Li
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
| | - Dong Cao
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 800010, Qinghai, China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
| | - Huaigang Zhang
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 800010, Qinghai, China
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Baolong Liu
- Qinghai Province Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China.
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 800010, Qinghai, China.
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Golebiowska GJ, Bonar E, Emami K, Wędzony M. Cold-modulated small proteins abundance in winter triticale (x Triticosecale, Wittm.) seedlings tolerant to the pink snow mould (Microdochium nivale, Samuels and Hallett) infection. Acta Biochim Pol 2019; 66:343-350. [PMID: 31509370 DOI: 10.18388/abp.2019_2804] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Accepted: 07/17/2019] [Indexed: 11/10/2022]
Abstract
Two winter triticale (x Triticosecale Wittmack) model cultivars: Hewo (tolerant to pink snow mould) and Magnat (sensitive) were used to test the effect of cold-hardening (4 weeks at 4°C) on soluble ≤50 kDa protein profiles of the seedling leaves. The presence and abundance of individual proteins were analysed via two-dimensional gel electrophoresis (2-DE) and Surface-Enhanced Laser Desorption/Ionization Time-of-Flight (SELDI-TOF). Up to now, no proteomics analysis of triticale response to hardening has been performed. Thus, the present paper is the first in the series describing the obtained results. In our experiments, the exposure to the low temperature-induced only quantitative changes in the leaves of both cultivars, causing either an increase or decrease of 4-50 kDa protein abundance. Among proteins which were cold-accumulated in cv. Hewo's leaves, we identified two thioredoxin peroxidases (chloroplastic thiol-specific antioxidant proteins) as well as mitochondrial- β-ATP synthase subunit and ADP-binding resistance protein. On the contrary, in hardened seedlings of this genotype, we observed the decreased level of chloroplastic RuBisCO small subunit PW9 and epidermal peroxidase 10. Simultaneous SELDI-TOF analysis revealed several low mass proteins better represented in cold-hardened plants of tolerant genotype in comparison to the sensitive one and the impact of both genotype and temperature on their level. Based on those results, we suggest that indicated proteins might be potential candidates for molecular markers of cold-induced snow mould resistance of winter triticale and their role is worth to be investigated in the further inoculation experiments.
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Affiliation(s)
- Gabriela Julia Golebiowska
- Pedagogical University of Cracow, Institute of Biology, Department of Cell Biology and Genetics, Kraków, Poland
| | - Emilia Bonar
- Jagiellonian University, Faculty of Biochemistry, Biophysics and Biotechnology, Department of Analytical Biochemistry, Kraków, Poland
| | - Kaveh Emami
- University of Newcastle Upon Tyne, School of Biology, Institute for Research on Environment and Sustainability, NE1 7RU, UK
| | - Maria Wędzony
- Pedagogical University of Cracow, Institute of Biology, Department of Cell Biology and Genetics, Kraków, Poland
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Zalewski K, Lahuta LB, Martysiak-Żurowska D, Okorski A, Nitkiewicz B, Zielonka Ł. Effect of Exogenous Application of Methyl Jasmonate on the Lipid and Carbohydrate Content and Composition of Winter Triticale ( Triticosecale Wittm.) Grain and the Severity of Fungal Infections in Triticale Plants and Grain. J Agric Food Chem 2019; 67:5932-5939. [PMID: 30994341 DOI: 10.1021/acs.jafc.9b00799] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Kernels of winter triticale ( Triticosecale Wittm. cv. Dinaro) were analyzed. In the autumn of 2015, the effect of methyl jasmonate (MJ) on the germination of triticale kernels and the development of triticale seedlings was analyzed in a laboratory before kernels were sown in experimental plots. Kernels harvested from plots in August 2016 were analyzed to determine their lipid and carbohydrate content and composition and the severity of fungal infections. Triticale grain was harvested at full maturity. The plots were sprayed with MJ at concentrations of 10-6 to 10-3 M in the stem elongation stage (200 L/ha) and in the early milk stage (300 L/ha). Other preventive treatments, fungicides, pesticides, or foliar fertilizers were not applied. Lipids of triticale kernels contained 20 fatty acids (FAs) with the highest proportion of linoleic acid. Methyl jasmonate did not exert a significant effect on the FA composition of kernel lipids treated with the plant hormone during the growing season. Statistical analysis did not reveal significant ( p < 0.05) differences in the total content of soluble carbohydrates in control kernels and in the kernels collected from triticale plants treated with MJ. Methyl jasmonate applied at a concentration of 10-3 M in BBCH stages 54 and 73 reduced the prevalence of stem base, leaf, and spike diseases. However, the severity of grain infections caused by mycotoxin-producing fungi increased in treatments where MJ was applied at a concentration of 10-5 M relative to the control treatment. The study describes the results noted in naturally infected plants and provides valuable inputs for agricultural practice, but further research is required to validate the presented findings.
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Affiliation(s)
- Kazimierz Zalewski
- Department of Biochemistry, Faculty of Biology and Biotechnology , University of Warmia and Mazury , 10-719 Olsztyn , Poland
| | - Lesław Bernard Lahuta
- Department of Plant Physiology, Genetics and Biotechnology, Faculty of Biology and Biotechnology , University of Warmia and Mazury , 10-719 Olsztyn , Poland
| | - Dorota Martysiak-Żurowska
- Department of Chemistry, Technology and Biotechnology of Food , Gdańsk University of Technology , 80-233 Gdansk , Poland
| | - Adam Okorski
- Department of Entomology, Phytopathology and Molecular Diagnostics , University of Warmia and Mazury , 10-727 Olsztyn , Poland
| | - Bartosz Nitkiewicz
- Department of Biochemistry, Faculty of Biology and Biotechnology , University of Warmia and Mazury , 10-719 Olsztyn , Poland
| | - Łukasz Zielonka
- Department of Veterinary Prevention and Feed , University of Warmia and Mazury , 10-718 Olsztyn , Poland
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Dyda M, Wąsek I, Tyrka M, Wędzony M, Szechyńska-Hebda M. Local and systemic regulation of PSII efficiency in triticale infected by the hemibiotrophic pathogen Microdochium nivale. Physiol Plant 2019; 165:711-727. [PMID: 29774565 DOI: 10.1111/ppl.12760] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 04/15/2018] [Accepted: 05/11/2018] [Indexed: 05/13/2023]
Abstract
Microdochium nivale is a fungal pathogen that causes yield losses of cereals during winter. Cold hardening under light conditions induces genotype-dependent resistance of a plant to infection. We aim to show how photosystem II (PSII) regulation contributes to plant resistance. Using mapping population of triticale doubled haploid lines, three M. nivale strains and different infection assays, we demonstrate that plants that maintain a higher maximum quantum efficiency of PSII show less leaf damage upon infection. The fungus can establish necrotrophic or biotrophic interactions with susceptible or resistant genotypes, respectively. It is suggested that local inhibition of photosynthesis during the infection of sensitive genotypes is not balanced by a supply of energy from the tissue surrounding the infected cells as efficiently as in resistant genotypes. Thus, defence is limited, which in turn results in extensive necrotic damage. Quantitative trait loci regions, involved in the control of both PSII functioning and resistance, were located on chromosomes 4 and 6, similar to a wide range of PSII- and resistance-related genes. A meta-analysis of microarray experiments showed that the expression of genes involved in the repair and de novo assembly of PSII was maintained at a stable level. However, to establish a favourable energy balance for defence, genes encoding PSII proteins resistant to oxidative degradation were downregulated to compensate for the upregulation of defence-related pathways. Finally, we demonstrate that the structural and functional integrity of the plant is a factor required to meet the energy demand of infected cells, photosynthesis-dependent systemic signalling and defence responses.
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Affiliation(s)
- Mateusz Dyda
- The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, 30-239, Kraków, Poland
- Pedagogical University of Cracow, 30-084, Kraków, Poland
| | - Iwona Wąsek
- The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, 30-239, Kraków, Poland
| | - Mirosław Tyrka
- Department of Biochemistry and Biotechnology, Faculty of Chemistry, Rzeszow University of Technology, Rzeszow, Poland
| | - Maria Wędzony
- Pedagogical University of Cracow, 30-084, Kraków, Poland
| | - Magdalena Szechyńska-Hebda
- The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, 30-239, Kraków, Poland
- Plant Breeding and Acclimatization Institute-National Research Institute, 05-870, Blonie, Poland
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9
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Pomortsev A, Dorofeev N, Sokolova L, Zorina S, Katysheva N. Physiological and Biochemical Response of Winter Triticale Crowns at Different Soil Moisture Levels. Pak J Biol Sci 2018; 21:387-393. [PMID: 30418000 DOI: 10.3923/pjbs.2018.387.393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND AND OBJECTIVE The spring growth of winter cereals depends on the viability of the crowns as it is the key organ of the spring renewal of leaves, stems and roots. After the plants out of wintering, the impact of stressful conditions in the spring period negatively affects the viability of the crowns of winter cereals. The study was aimed at studying the physiological and biochemical reactions of the crowns of winter triticale, depending on the moisture level of the soil after wintering. MATERIALS AND METHODS The physiological and biochemical reaction of crowns of winter triticale to the change of the soil moisture-30, 60, 90 of the field capacity (FC) was studied under the controlled conditions of the vegetation experience. The viability of crowns winter triticale, water content, free proline, water-soluble carbohydrates and the qualitative composition of dehydrins were investigated. RESULTS Plant survival and steady water content during the first 10 days is associated with an increase in the concentration of free proline, high content of water-soluble carbohydrates and dehydrins in crowns, regardless of the soil moisture level. At later stages of spring growth resumption (20 and 30 days), a decrease in carbohydrates, dehydrins and proline was noted in the crowns of winter triticale at all the studied levels of soil moisture. These substances are likely playing an important role in the osmotic regulation and protection of the components of the cells of crowns at the initial stage (10 days) of the plants growth resumption. CONCLUSION The higher content of proline and the low water content of the tissues of crowns were noted in plants in the variant with a lack of moisture. Water deficiency in the period of growth resumption after wintering has a negative effect on the survival of plants.
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Czerniewicz P, Sytykiewicz H, Durak R, Borowiak-Sobkowiak B, Chrzanowski G. Role of phenolic compounds during antioxidative responses of winter triticale to aphid and beetle attack. Plant Physiol Biochem 2017; 118:529-540. [PMID: 28778044 DOI: 10.1016/j.plaphy.2017.07.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 07/25/2017] [Accepted: 07/27/2017] [Indexed: 05/20/2023]
Abstract
One of the earliest responses of plants to insects' attack is generation of reactive oxygen species. However, the elevated level of ROS can elicit oxidative burst within plant tissues, and plants employ antioxidant systems against these radicals. Due to their chemical structures, polyphenols are able to diminish the level of ROS. Thus, we investigated the role of phenolic compounds in oxidative stress within winter triticale caused by Sitobion avenae and Oulema melanopus. It was found, that infestation by insects induced a high increase in the content of hydrogen peroxide and superoxide anion radical within resistant Lamberto cv. 24 hpi, whereas in sensitive Marko cv., an increase in H2O2 content was found within two days of aphid feeding. Moreover, resistant plants showed earlier and much greater induction of l-phenylalanine and l-tyrosine ammonia lyases and chalcone synthase activities, as well as accumulation of phenolic compounds in response to insect feeding than susceptible Marko. On the other hand, strong positive influence of hydrogen peroxide and superoxide radical contents on chalcone synthase activity and furthermore flavonoid biosynthesis was detected in the susceptible cultivar. Negative relationships between level of o-coumaric acid or flavonoid compounds and content of hydrogen peroxide or superoxide radical suggest their antioxidant capacity. Luteolin and o-coumaric acid may attend in scavenging of hydrogen peroxide, whereas quercetin, apigenin and (+)-catechin probably participate in reduction of superoxide anion radical content.
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Affiliation(s)
- Paweł Czerniewicz
- Department of Biochemistry and Molecular Biology, Siedlce University of Natural Sciences and Humanities, Prusa 12, 08-110 Siedlce, Poland
| | - Hubert Sytykiewicz
- Department of Biochemistry and Molecular Biology, Siedlce University of Natural Sciences and Humanities, Prusa 12, 08-110 Siedlce, Poland
| | - Roma Durak
- Department of Invertebrate Zoology, University of Rzeszów, Zelwerowicza 4, 35-601 Rzeszów, Poland
| | - Beata Borowiak-Sobkowiak
- Department of Entomology and Environmental Protection, Poznań University of Life Sciences, Dąbrowskiego 159, 60-594 Poznań, Poland
| | - Grzegorz Chrzanowski
- Department of Biochemistry and Molecular Biology, Siedlce University of Natural Sciences and Humanities, Prusa 12, 08-110 Siedlce, Poland.
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Zdunek-Zastocka E, Grabowska A, Branicki T, Michniewska B. Biochemical characterization of the triticale TsPAP1, a new type of plant prolyl aminopeptidase, and its impact on proline content and flowering time in transgenic Arabidopsis plants. Plant Physiol Biochem 2017; 116:18-26. [PMID: 28482331 DOI: 10.1016/j.plaphy.2017.04.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 04/20/2017] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
Proline aminopeptidase (PAP, EC 3.4.11.5) is the only enzyme that effectively releases proline from the N-termini of peptides. The amino acid sequence of the PAP from Triticosecale, TsPAP1, comprises conserved regions, characteristic of the monomeric forms of PAP found in bacteria but not yet identified in plants. Therefore, we aimed to obtain and biochemically characterize the TsPAP1 protein. The recombinant TsPAP1 protein was received through heterologous expression of the TsPAP1 coding sequence in a bacterial expression system and purified with affinity chromatography. Gel filtration chromatography and SDS electrophoresis revealed that TsPAP1 is a monomer with a molecular mass of 37.5 kDa. TsPAP1 prefers substrates with proline at the N-terminus but is also capable of hydrolyzing β-naphthylamides of hydroxyproline and alanine. Among the peptides tested, the most preferred were di- and tripeptides, especially those with glycine in the Y position. The use of diagnostic inhibitors indicated that TsPAP1 is a serine peptidase; however, further characterization revealed that the SH residues are also important for maintaining its activity. To examine the role of TsPAP1 under physiological conditions, we developed transgenic Arabidopsis plants overexpressing TsPAP1. Compared with wild-type plants, the transgenic lines accumulated more proline, flowered an average of 3.5 days earlier, and developed more siliques than did untransformed controls. Our paper is the first to describe the biochemical properties of a novel monomeric plant PAP and contributes to the functional characterization of PAP proteins in plants.
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Affiliation(s)
- Edyta Zdunek-Zastocka
- Department of Biochemistry, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland.
| | - Agnieszka Grabowska
- Department of Biochemistry, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Tomasz Branicki
- Department of Biochemistry, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Beata Michniewska
- Department of Biochemistry, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
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Rapacz M, Jurczyk B, Sasal M. Deacclimation may be crucial for winter survival of cereals under warming climate. Plant Sci 2017; 256:5-15. [PMID: 28167038 DOI: 10.1016/j.plantsci.2016.11.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 11/18/2016] [Accepted: 11/20/2016] [Indexed: 05/28/2023]
Abstract
Climate warming can change the winter weather patterns. Warmer temperatures during winter result in a lower risk of extreme freezing events. On the other hand the predicted warm gaps during winter will decrease their freezing tolerance. Both contradict effects will affect winter survival but their resultant effect is unclear. In this paper, we demonstrate that climate warming may result in a decrease in winter survival of plants. A field study of winterhardiness of common wheat and triticale was established at 11 locations and repeated during three subsequent winters. The freezing tolerance of the plants was studied after controlled cold acclimation and de-acclimation using both plant survival analysis and chlorophyll fluorescence measurements. Cold deacclimation resistance was shown to be independent from cold acclimation ability. Further, cold deacclimation resistance appeared to be crucial for overwintering when deacclimation conditions occurred in the field. The shortening of uninterrupted cold acclimation may increase cold deacclimation efficiency, which could threaten plant survival during warmer winters. Measurements of chlorophyll fluorescence transient showed some differences triggered by freezing before and after deacclimation. We conclude that cold deacclimation resistance should be considered in the breeding of winter cereals and in future models of winter damage risk.
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Affiliation(s)
- Marcin Rapacz
- University of Agriculture in Kraków, Faculty of Agriculture and Economics, Department of Plant Physiology, Podłużna 3, 30-239 Kraków, Poland.
| | - Barbara Jurczyk
- University of Agriculture in Kraków, Faculty of Agriculture and Economics, Department of Plant Physiology, Podłużna 3, 30-239 Kraków, Poland
| | - Monika Sasal
- University of Agriculture in Kraków, Faculty of Agriculture and Economics, Department of Plant Physiology, Podłużna 3, 30-239 Kraków, Poland
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13
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Siegert W, Boguhn J, Maurer HP, Weiss J, Zuber T, Möhring J, Rodehutscord M. Effect of nitrogen fertilisation on the amino acid digestibility of different triticale genotypes in caecectomised laying hens. J Sci Food Agric 2017; 97:144-150. [PMID: 26953167 DOI: 10.1002/jsfa.7701] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 02/29/2016] [Accepted: 02/29/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND The influence of nitrogen fertilisation and genotype on the amino acid (AA) digestibility of triticale grain was investigated in caecectomised laying hens. Three genotypes, Grenado, EAW6002 and Lasko, were cultivated with and without nitrogen fertilisation at the end of the heading stage. The six triticale variants as well as a basal diet were each used to feed seven laying hens in a 7 × 7 Latin square design. RESULTS Nitrogen fertilisation influenced the digestibility of Cys, Glu, Phe and Ser in some triticale genotypes and reduced Ala, Ile, Lys, Met and Val digestibility in all genotypes (P < 0.05). Nitrogen fertilisation increased the concentration of all AAs in the grain. Consequently, the concentration of digestible AAs in the grains was increased for most AAs upon nitrogen fertilisation. Overall, Lys had the lowest digestibility, whereas that of Glu and Pro was the highest. For the triticale genotypes, the level of AA digestibility was highest for EAW6002 followed by Lasko and Grenado, with significant differences (P < 0.05) between genotypes for some but not all AAs. CONCLUSION The results indicated that the accuracy of the digestible AA supply for hen feeding might benefit from considering fertilisation and genotype-specific digestibility data in feed formulation. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Wolfgang Siegert
- Institut für Nutzierwissenschaften, Universität Hohenheim, Stuttgart, Germany
| | - Jeannette Boguhn
- Institut für Nutzierwissenschaften, Universität Hohenheim, Stuttgart, Germany
| | | | - Jochen Weiss
- Institut für Lebensmittelwissenschaft und Biotechnologie, Universität Hohenheim, Stuttgart, Germany
| | - Tobias Zuber
- Institut für Nutzierwissenschaften, Universität Hohenheim, Stuttgart, Germany
| | - Jens Möhring
- Institut für Kulturpflanzenwissenschaften, Universität Hohenheim, Stuttgart, Germany
| | - Markus Rodehutscord
- Institut für Nutzierwissenschaften, Universität Hohenheim, Stuttgart, Germany
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14
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Hura T, Dziurka M, Hura K, Ostrowska A, Dziurka K. Different allocation of carbohydrates and phenolics in dehydrated leaves of triticale. J Plant Physiol 2016; 202:1-9. [PMID: 27450489 DOI: 10.1016/j.jplph.2016.06.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 06/16/2016] [Accepted: 06/16/2016] [Indexed: 06/06/2023]
Abstract
Carbohydrates are used in plant growth processes, osmotic regulation and secondary metabolism. A study of the allocation of carbohydrates to a target set of metabolites during triticale acclimation to soil drought was performed. The study included a semi-dwarf cultivar 'Woltario' and a long-stemmed cultivar 'Moderato', differing in the activity of the photosynthetic apparatus under optimum growth conditions. Differences were found in the quantitative and qualitative composition of individual carbohydrates and phenolic compounds, depending on the developmental stage and water availability. Soluble carbohydrates in the semi-dwarf 'Woltario' cv. under soil drought were utilized for synthesis of starch, soluble phenolic compounds and an accumulation of cell wall carbohydrates. In the typical 'Moderato' cv., soluble carbohydrates were primarily used for the synthesis of phenolic compounds that were then incorporated into cell wall structures. Increased content of cell wall-bound phenolics in 'Moderato' cv. improved the cell wall tightness and reduced the rate of leaf water loss. In 'Woltario' cv., the increase in cell osmotic potential due to an enhanced concentration of carbohydrates and proline was insufficient to slow down the rate of leaf water loss. The mechanism of cell wall tightening in response to leaf desiccation may be the main key in the process of triticale acclimation to soil drought.
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Affiliation(s)
- Tomasz Hura
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239 Kraków, Poland.
| | - Michał Dziurka
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239 Kraków, Poland
| | - Katarzyna Hura
- Department of Plant Physiology, Faculty of Agriculture and Economics, Agricultural University, Podłużna 3, 30-239 Kraków, Poland
| | - Agnieszka Ostrowska
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239 Kraków, Poland
| | - Kinga Dziurka
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239 Kraków, Poland
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15
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Agudelo RA, García-Aparicio MP, Görgens JF. Steam explosion pretreatment of triticale (× Triticosecale Wittmack) straw for sugar production. N Biotechnol 2015; 33:153-63. [PMID: 26477303 DOI: 10.1016/j.nbt.2015.10.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 10/08/2015] [Accepted: 10/08/2015] [Indexed: 11/17/2022]
Abstract
Triticale, a non-food based, low-cost and well-adapted crop in marginal lands has been considered as a potential 1G and 2G feedstock for bio-ethanol production. In this work, triticale straw was evaluated as a source of fermentable sugars by combination of uncatalyzed steam explosion and enzymatic hydrolysis. Pretreatment conditions with severities from 3.05 to 4.12 were compared in order to identify conditions that favour the recovery of hemicellulose-derived sugars, cellulose digestibility or the combined sugars yield (CSY) from the pretreatment-enzymatic hydrolysis. Xylose oligosaccharide was the major sugar in hydrolysates from all pretreatment conditions. Maximum hemicellulose-sugars recovery (52% of the feedstock content) was obtained at 200 °C and 5 min. The highest cellulose digestibility (95%) was found at 200 °C - 15 min, although glucose recovery from hydrolysis was maximised at 200 °C - 10 min (digestibility >92%) due to higher mass yield of pretreated solids. The maximum CSY (nearly 77% of theoretical content) was obtained at 200 °C - 5 min. Sugar loss after pretreatment was observed to higher extent at harsher severities. However, the concentrations of sugar degradation products and acetic acid were at levels below tolerance limits of the downstream biological conversions. Steam explosion pretreatment without acid impregnation is a good technology for production of fermentable sugars from triticale straw. This work provides foundation for future autohydrolysis steam explosion optimization studies to enhanced sugars recovery and digestibility of triticale straw.
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Affiliation(s)
- Roberto A Agudelo
- Department of Process Engineering, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - María P García-Aparicio
- Department of Process Engineering, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa; Department of Microbiology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
| | - Johann F Görgens
- Department of Process Engineering, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
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