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Kisvarga S, Hamar-Farkas D, Horotán K, Gyuricza C, Ražná K, Kučka M, Harenčár Ľ, Neményi A, Lantos C, Pauk J, Solti Á, Simon E, Bibi D, Mukherjee S, Török K, Tilly-Mándy A, Papp L, Orlóci L. Investigation of a Perspective Urban Tree Species, Ginkgo biloba L., by Scientific Analysis of Historical Old Specimens. PLANTS (BASEL, SWITZERLAND) 2024; 13:1470. [PMID: 38891279 PMCID: PMC11175039 DOI: 10.3390/plants13111470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/18/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024]
Abstract
In this study, we examined over 200-year-old Ginkgo biloba L. specimens under different environmental conditions. The overall aim was to explore which factors influence their vitality and general fitness in urban environments and thus their ability to tolerate stressful habitats. In order to determine this, we used a number of different methods, including histological examinations (stomatal density and size) and physiological measurements (peroxidase enzyme activity), as well as assessing the air pollution tolerance index (APTI). The investigation of the genetic relationships between individuals was performed using flow cytometry and miRNA marker methods. The genetic tests revealed that all individuals are diploid, whereas the lus-miR168 and lus-miR408 markers indicated a kinship relation between them. These results show that the effect of different habitat characteristics can be detected through morphological and physiological responses, thus indicating relatively higher stress values for all studied individuals. A significant correlation can be found between the level of adaptability and the relatedness of the examined individuals. These results suggest that Ginkgo biloba L. is well adapted to an environment with increased stress factors and therefore suitable for use in urban areas.
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Affiliation(s)
- Szilvia Kisvarga
- Ornamental Plant and Green System Management Research Group, Institute of Landscape Architecture, Urban Planning and Garden Art, Hungarian University of Agriculture and Life Sciences (MATE), 1223 Budapest, Hungary; (S.K.); (A.N.); (L.O.)
| | - Dóra Hamar-Farkas
- Ornamental Plant and Green System Management Research Group, Institute of Landscape Architecture, Urban Planning and Garden Art, Hungarian University of Agriculture and Life Sciences (MATE), 1223 Budapest, Hungary; (S.K.); (A.N.); (L.O.)
- Department of Floriculture and Dendrology, Institute of Landscape Architecture, Urban Planning and Garden Art, Hungarian University of Agriculture and Life Sciences (MATE), 1223 Budapest, Hungary;
| | - Katalin Horotán
- Institute of Biology, Eszterházy Károly Catholic University, 3300 Eger, Hungary;
| | - Csaba Gyuricza
- Institute of Agronomy, Hungarian University of Agriculture and Life Sciences (MATE), 1118 Gödöllő, Hungary
| | - Katarína Ražná
- Institute of Plant and Environmental Sciences, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, 94976 Nitra, Slovakia; (K.R.); (M.K.); (Ľ.H.)
| | - Matúš Kučka
- Institute of Plant and Environmental Sciences, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, 94976 Nitra, Slovakia; (K.R.); (M.K.); (Ľ.H.)
| | - Ľubomír Harenčár
- Institute of Plant and Environmental Sciences, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, 94976 Nitra, Slovakia; (K.R.); (M.K.); (Ľ.H.)
| | - András Neményi
- Ornamental Plant and Green System Management Research Group, Institute of Landscape Architecture, Urban Planning and Garden Art, Hungarian University of Agriculture and Life Sciences (MATE), 1223 Budapest, Hungary; (S.K.); (A.N.); (L.O.)
| | - Csaba Lantos
- Cereal Research Non-Profit Company, 6726 Szeged, Hungary; (C.L.); (J.P.)
| | - János Pauk
- Cereal Research Non-Profit Company, 6726 Szeged, Hungary; (C.L.); (J.P.)
| | - Ádám Solti
- Department of Plant Physiology and Molecular Plant Biology, Eötvös Loránd University, 1117 Budapest, Hungary;
| | - Edina Simon
- Eötvös Loránd Research Network, University of Debrecen, 4032 Debrecen, Hungary;
- Anthropocene Ecology Research Group, Department of Ecology, University of Debrecen, 4032 Debrecen, Hungary; (D.B.); (S.M.)
| | - Dina Bibi
- Anthropocene Ecology Research Group, Department of Ecology, University of Debrecen, 4032 Debrecen, Hungary; (D.B.); (S.M.)
| | - Semonti Mukherjee
- Anthropocene Ecology Research Group, Department of Ecology, University of Debrecen, 4032 Debrecen, Hungary; (D.B.); (S.M.)
| | - Katalin Török
- Eotvos Lorand Res Network (ELKH), Institute of Plant Biology, Biological Research Centre, 6722 Szeged, Hungary;
| | - Andrea Tilly-Mándy
- Department of Floriculture and Dendrology, Institute of Landscape Architecture, Urban Planning and Garden Art, Hungarian University of Agriculture and Life Sciences (MATE), 1223 Budapest, Hungary;
| | - László Papp
- Füvészkert Botanical Garden, Eötvös Loránd University, 1053 Budapest, Hungary;
| | - László Orlóci
- Ornamental Plant and Green System Management Research Group, Institute of Landscape Architecture, Urban Planning and Garden Art, Hungarian University of Agriculture and Life Sciences (MATE), 1223 Budapest, Hungary; (S.K.); (A.N.); (L.O.)
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Krivmane B, Ruņģe KS, Samsone I, Ruņģis DE. Differentially Expressed Conserved Plant Vegetative Phase-Change-Related microRNAs in Mature and Rejuvenated Silver Birch In Vitro Propagated Tissues. PLANTS (BASEL, SWITZERLAND) 2023; 12:1993. [PMID: 37653911 PMCID: PMC10220576 DOI: 10.3390/plants12101993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/08/2023] [Accepted: 05/13/2023] [Indexed: 09/02/2023]
Abstract
In plants, phase change from the juvenile stage to maturity involves physiological and anatomical changes, which are initiated and controlled by evolutionary highly conserved microRNAs. This process is of particular significance for the in vitro propagation of woody plant species, as individuals or tissues that have undergone the transition to vegetative maturity are recalcitrant to propagation. Conserved miRNAs differentially expressed between juvenile (including rejuvenated) and mature silver birch tissues were identified using high-throughput sequencing of small RNA libraries. Expression of some miR156 isoforms was high in juvenile tissues and has been previously reported to regulate phase transitions in a range of species. Additional miRNAs, such as miR394 and miR396, that were previously reported to be highly expressed in juvenile woody plant tissues were also differentially expressed in this study. However, expression of miR172, previously reported to be highly expressed in mature tissues, was low in all sample types in this study. The obtained results will provide insight for further investigation of the molecular mechanisms regulating vegetative phase change in silver birch and other perennial woody plant species, by analysing a wider range of genotypes, tissue types and maturation stages. This knowledge can potentially assist in identification of rejuvenated material at an earlier stage than currently possible, increasing the efficiency of silver birch in vitro propagation.
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Affiliation(s)
| | | | | | - Dainis Edgars Ruņģis
- Latvian State Forest Research Institute “Silava”, 111 Rīgas st, LV-2169 Salaspils, Latvia (K.S.R.)
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Yadav B, Kaur V, Narayan OP, Yadav SK, Kumar A, Wankhede DP. Integrated omics approaches for flax improvement under abiotic and biotic stress: Current status and future prospects. FRONTIERS IN PLANT SCIENCE 2022; 13:931275. [PMID: 35958216 PMCID: PMC9358615 DOI: 10.3389/fpls.2022.931275] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 06/27/2022] [Indexed: 05/03/2023]
Abstract
Flax (Linum usitatissimum L.) or linseed is one of the important industrial crops grown all over the world for seed oil and fiber. Besides oil and fiber, flax offers a wide range of nutritional and therapeutic applications as a feed and food source owing to high amount of α-linolenic acid (omega-3 fatty acid), lignans, protein, minerals, and vitamins. Periodic losses caused by unpredictable environmental stresses such as drought, heat, salinity-alkalinity, and diseases pose a threat to meet the rising market demand. Furthermore, these abiotic and biotic stressors have a negative impact on biological diversity and quality of oil/fiber. Therefore, understanding the interaction of genetic and environmental factors in stress tolerance mechanism and identification of underlying genes for economically important traits is critical for flax improvement and sustainability. In recent technological era, numerous omics techniques such as genomics, transcriptomics, metabolomics, proteomics, phenomics, and ionomics have evolved. The advancements in sequencing technologies accelerated development of genomic resources which facilitated finer genetic mapping, quantitative trait loci (QTL) mapping, genome-wide association studies (GWAS), and genomic selection in major cereal and oilseed crops including flax. Extensive studies in the area of genomics and transcriptomics have been conducted post flax genome sequencing. Interestingly, research has been focused more for abiotic stresses tolerance compared to disease resistance in flax through transcriptomics, while the other areas of omics such as metabolomics, proteomics, ionomics, and phenomics are in the initial stages in flax and several key questions remain unanswered. Little has been explored in the integration of omic-scale data to explain complex genetic, physiological and biochemical basis of stress tolerance in flax. In this review, the current status of various omics approaches for elucidation of molecular pathways underlying abiotic and biotic stress tolerance in flax have been presented and the importance of integrated omics technologies in future research and breeding have been emphasized to ensure sustainable yield in challenging environments.
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Affiliation(s)
- Bindu Yadav
- Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi, India
| | - Vikender Kaur
- Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi, India
| | - Om Prakash Narayan
- College of Arts and Sciences, University of Florida, Gainesville, FL, United States
| | - Shashank Kumar Yadav
- Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi, India
| | - Ashok Kumar
- Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi, India
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Ražná K, Harenčár Ľ, Kučka M. The Involvement of microRNAs in Plant Lignan Biosynthesis—Current View. Cells 2022; 11:cells11142151. [PMID: 35883592 PMCID: PMC9323225 DOI: 10.3390/cells11142151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 02/01/2023] Open
Abstract
Lignans, as secondary metabolites synthesized within a phenylpropanoid pathway, play various roles in plants, including their involvement in growth and plant defense processes. The health and nutritional benefits of lignans are unquestionable, and many studies have been devoted to these attributes. Although the regulatory role of miRNAs in the biosynthesis of secondary metabolites has been widely reported, there is no systematic review available on the miRNA-based regulatory mechanism of lignans biosynthesis. However, the genetic background of lignan biosynthesis in plants is well characterized. We attempted to put together a regulatory mosaic based on current knowledge describing miRNA-mediated regulation of genes, enzymes, or transcription factors involved in this biosynthesis process. At the same time, we would like to underline the fact that further research is necessary to improve our understanding of the miRNAs regulating plant lignan biosynthesis by exploitation of current approaches for functional identification of miRNAs.
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Ali E, Saand MA, Khan AR, Shah JM, Feng S, Ming C, Sun P. Genome-wide identification and expression analysis of detoxification efflux carriers (DTX) genes family under abiotic stresses in flax. PHYSIOLOGIA PLANTARUM 2021; 171:483-501. [PMID: 32270877 DOI: 10.1111/ppl.13105] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/31/2020] [Accepted: 04/04/2020] [Indexed: 05/19/2023]
Abstract
The detoxification efflux carriers (DTX)/multidrug and toxic compound extrusion (MATE) transporters encompass an ancient gene family of secondary transporters involved in the process of plant detoxification. A genome-wide analysis of these transporters was carried out in order to better understand the transport of secondary metabolites in flaxseed genome (Linum usitassimum). A total of 73 genes coding for DTX/MATE transporters were identified. Gene structure, protein domain and motif organization were found to be notably conserved over the distinct phylogenetic groups, showing the evolutionary significant role of each class. Gene ontology (GO) annotation revealed a link to transporter activities, response to stimulus and localizations. The presence of various hormone and stress-responsive cis-regulatory elements in promoter regions could be directly correlated with the alteration of their transcripts. Tertiary structure showed conservation for pore size and constrains in the pore, which indicate their involvement in the exclusion of toxic substances from the cell. MicroRNA target analysis revealed that LuDTXs genes were targeted by different classes of miRNA families. Twelve LuDTX genes were chosen for further quantitative real-time polymerase chain reaction analysis in response to cold, salinity and cadmium stress at 0, 6, 12 and 24 hours after treatment. Altogether, the identified members of the DTX gene family, their expression profile, phylogenetic and miRNAs analysis might provide opportunities for future functional validation of this important gene family in flax.
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Affiliation(s)
- Essa Ali
- Department of Food Science and Technology, Zhejiang University of Technology, Zhejiang, 310014, China
| | - Mumtaz Ali Saand
- Department of Botany, Shah Abdul Latif University, Sindh, 66020, Pakistan
- Hainan Key Laboratory of Tropical Oil Crops Biology/Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, 571339, China
| | - Ali Raza Khan
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | | | - Simin Feng
- Department of Food Science and Technology, Zhejiang University of Technology, Zhejiang, 310014, China
| | - Cai Ming
- Department of Food Science and Technology, Zhejiang University of Technology, Zhejiang, 310014, China
| | - Peilong Sun
- Department of Food Science and Technology, Zhejiang University of Technology, Zhejiang, 310014, China
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Molecular characterization of the effect of plant-based elicitor using microRNAs markers in wheat genome. Biologia (Bratisl) 2020. [DOI: 10.2478/s11756-020-00546-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ali E, Raza MA, Cai M, Hussain N, Shahzad AN, Hussain M, Ali M, Bukhari SAH, Sun P. Calmodulin-binding transcription activator (CAMTA) genes family: Genome-wide survey and phylogenetic analysis in flax (Linum usitatissimum). PLoS One 2020; 15:e0236454. [PMID: 32702710 PMCID: PMC7377914 DOI: 10.1371/journal.pone.0236454] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 07/05/2020] [Indexed: 12/21/2022] Open
Abstract
Flax (Linum usitatissimum) is a member of family linaceae with annual growth habit. It is included among those crops which were domesticated very early and has been used in development related studies as a model plant. In plants, Calmodulin-binding transcription activators (CAMTAs) comprise a unique set of Calmodulin-binding proteins. To elucidate the transport mechanism of secondary metabolites in flax, a genome-based study on these transporters was performed. The current investigation identified nine CAMTAs proteins, classified into three categories during phylogenetic analysis. Each group had significant evolutionary role as illustrated by the conservation of gene structures, protein domains and motif organizations over the distinctive phylogenetic classes. GO annotation suggested a link to sequence-specific DNA and protein binding, response to low temperature and transcription regulation by RNA polymerase II. The existence of different hormonal and stress responsive cis-regulatory elements in promotor region may directly correlate with the variation of their transcripts. MicroRNA target analysis revealed that various groups of miRNA families targeted the LuCAMTAs genes. Identification of CAMTA genes, miRNA studies and phylogenetic analysis may open avenues to uncover the underlying functional mechanism of this important family of genes in flax.
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Affiliation(s)
- Essa Ali
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Mohammad Ammar Raza
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang, China
| | - Ming Cai
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Nazim Hussain
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | | | - Mubshar Hussain
- Department of Agronomy, Bahauddin Zakariya University, Multan, Pakistan
| | - Murtaza Ali
- Department of Basic Science & Humanities, University of Engineering and Technology, Mardan, Pakistan
| | | | - Peilong Sun
- Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, Zhejiang, China
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Identification and Characterization of microRNAs in the Developing Seed of Linseed Flax ( Linum usitatissimum L.). Int J Mol Sci 2020; 21:ijms21082708. [PMID: 32295287 PMCID: PMC7215410 DOI: 10.3390/ijms21082708] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/01/2020] [Accepted: 04/09/2020] [Indexed: 11/17/2022] Open
Abstract
Seed development plays an important role during the life cycle of plants. Linseed flax is an oil crop and the seed is a key organ for fatty acids synthesis and storage. So it is important to understand the molecular mechanism of fatty acid biosynthesis during seed development. In this study, four small RNA libraries from early seeds at 5, 10, 20 and 30 days after flowering (DAF) were constructed and used for high-throughput sequencing to identify microRNAs (miRNAs). A total of 235 miRNAs including 114 known conserved miRNAs and 121 novel miRNAs were identified. The expression patterns of these miRNAs in the four libraries were investigated by bioinformatics and quantitative real-time polymerase chain reaction (qPCR) analysis. It was found that several miRNAs, including Lus-miRNA156a was significantly correlated with seed development process. In order to confirm the actual biological function of Lus-miRNA156a, over-expression vector was constructed and transformed to Arabidopsis. The phenotypes of homozygous transgenic lines showed decreasing of oil content and most of the fatty acid content in seeds as well as late flowering time. The results provided a clue that miRNA156a participating the fatty acid biosynthesis pathway and the detailed molecular mechanism of how it regulates the pathway needs to be further investigated.
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Identification, characterization and expression analysis of passion fruit ( Passiflora edulis) microRNAs. 3 Biotech 2020; 10:25. [PMID: 31938684 PMCID: PMC6938847 DOI: 10.1007/s13205-019-2000-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 11/29/2019] [Indexed: 02/04/2023] Open
Abstract
microRNAs (miRNAs) are highly conserved, short (~ 21-nucleotide), endogenous, non-coding RNA molecules that play major roles in post-transcriptional silencing by guiding target mRNA cleavage or translational inhibition. In this study, applying high-stringent genome-wide computational-based approaches, a total of 28 putative miRNAs belonging to 17 miRNA families were identified from an antioxidant-rich medicinal plant passion fruit (Passiflora edulis). Inter-tissue (leaves and fruits) and inter-varietal (yellow and purple fruit varieties) quantitative study of six putative passion fruit miRNAs (ped-miR160, ped-miR164, ped-miR166, ped-miR393, ped-miR394, and ped-miR398) showed differential expression. Using psRNATarget tool, a total of 25 potential target proteins of the characterized passion fruit miRNAs were also identified. Most of the target proteins identified in this study, including SQUAMOSA promoter binding, Class III HD-Zip, NAC, Scarecrow, APETALA2, Auxin response factor, MYB, and superoxide dismutase, were found to be involved in development, metabolism, and defense/stress response signaling.
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Behr M, Guerriero G, Grima-Pettenati J, Baucher M. A Molecular Blueprint of Lignin Repression. TRENDS IN PLANT SCIENCE 2019; 24:1052-1064. [PMID: 31371222 DOI: 10.1016/j.tplants.2019.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 07/10/2019] [Accepted: 07/10/2019] [Indexed: 06/10/2023]
Abstract
Although lignin is essential to ensure the correct growth and development of land plants, it may be an obstacle to the production of lignocellulosics-based biofuels, and reduces the nutritional quality of crops used for human consumption or livestock feed. The need to tailor the lignocellulosic biomass for more efficient biofuel production or for improved plant digestibility has fostered considerable advances in our understanding of the lignin biosynthetic pathway and its regulation. Most of the described regulators are transcriptional activators of lignin biosynthesis, but considerably less attention has been devoted to the repressors of this pathway. We provide a comprehensive overview of the molecular factors that negatively impact on the lignification process at both the transcriptional and post-transcriptional levels.
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Affiliation(s)
- Marc Behr
- Laboratoire de Biotechnologie Végétale, Université libre de Bruxelles, 6041 Gosselies, Belgium
| | - Gea Guerriero
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 4422 Belvaux, Luxembourg
| | - Jacqueline Grima-Pettenati
- Laboratoire de Recherche en Sciences Végétales, Centre National de la Recherche Scientifique (CNRS) Université Paul Sabatier Toulouse III (UPS), 31326 Castanet-Tolosan, France
| | - Marie Baucher
- Laboratoire de Biotechnologie Végétale, Université libre de Bruxelles, 6041 Gosselies, Belgium.
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Gorshkov O, Chernova T, Mokshina N, Gogoleva N, Suslov D, Tkachenko A, Gorshkova T. Intrusive Growth of Phloem Fibers in Flax Stem: Integrated Analysis of miRNA and mRNA Expression Profiles. PLANTS (BASEL, SWITZERLAND) 2019; 8:E47. [PMID: 30791461 PMCID: PMC6409982 DOI: 10.3390/plants8020047] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/13/2019] [Accepted: 02/14/2019] [Indexed: 12/21/2022]
Abstract
Phloem fibers are important elements of plant architecture and the target product of many fiber crops. A key stage in fiber development is intrusive elongation, the mechanisms of which are largely unknown. Integrated analysis of miRNA and mRNA expression profiles in intrusivelygrowing fibers obtained by laser microdissection from flax (Linum usitatissimum L.) stem revealed all 124 known flax miRNA from 23 gene families and the potential targets of differentially expressed miRNAs. A comparison of the expression between phloem fibers at different developmental stages, and parenchyma and xylem tissues demonstrated that members of miR159, miR166, miR167, miR319, miR396 families were down-regulated in intrusively growing fibers. Some putative target genes of these miRNA families, such as those putatively encoding growth-regulating factors, an argonaute family protein, and a homeobox-leucine zipper family protein were up-regulated in elongating fibers. miR160, miR169, miR390, and miR394 showed increased expression. Changes in the expression levels of miRNAs and their target genes did not match expectations for the majority of predicted target genes. Taken together, poorly understood intrusive fiber elongation, the key process of phloem fiber development, was characterized from a miRNA-target point of view, giving new insights into its regulation.
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Affiliation(s)
- Oleg Gorshkov
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, 420111 Kazan, Russia.
| | - Tatyana Chernova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, 420111 Kazan, Russia.
| | - Natalia Mokshina
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, 420111 Kazan, Russia.
| | - Natalia Gogoleva
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, 420111 Kazan, Russia.
- Laboratory of Extreme Biology, Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kremlyovskaya Str., 18, 420021 Kazan, Russia.
| | - Dmitry Suslov
- Department of Plant Physiology and Biochemistry, Faculty of Biology, Saint Petersburg State University, Universiteskaya emb., 7/9, 199034 Saint Petersburg, Russia.
| | - Alexander Tkachenko
- Department of Genetics and Biotechnology, Faculty of Biology, Saint Petersburg State University, Universiteskaya emb., 7/9, 199034 Saint Petersburg, Russia.
| | - Tatyana Gorshkova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, 420111 Kazan, Russia.
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Le Roy J, Blervacq AS, Créach A, Huss B, Hawkins S, Neutelings G. Spatial regulation of monolignol biosynthesis and laccase genes control developmental and stress-related lignin in flax. BMC PLANT BIOLOGY 2017; 17:124. [PMID: 28705193 PMCID: PMC5513022 DOI: 10.1186/s12870-017-1072-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 07/02/2017] [Indexed: 05/26/2023]
Abstract
BACKGROUND Bast fibres are characterized by very thick secondary cell walls containing high amounts of cellulose and low lignin contents in contrast to the heavily lignified cell walls typically found in the xylem tissues. To improve the quality of the fiber-based products in the future, a thorough understanding of the main cell wall polymer biosynthetic pathways is required. In this study we have carried out a characterization of the genes involved in lignin biosynthesis in flax along with some of their regulation mechanisms. RESULTS We have first identified the members of the phenylpropanoid gene families through a combination of in silico approaches. The more specific lignin genes were further characterized by high throughput transcriptomic approaches in different organs and physiological conditions and their cell/tissue expression was localized in the stems, roots and leaves. Laccases play an important role in the polymerization of monolignols. This multigenic family was determined and a miRNA was identified to play a role in the posttranscriptional regulation by cleaving the transcripts of some specific genes shown to be expressed in lignified tissues. In situ hybridization also showed that the miRNA precursor was expressed in the young xylem cells located near the vascular cambium. The results obtained in this work also allowed us to determine that most of the genes involved in lignin biosynthesis are included in a unique co-expression cluster and that MYB transcription factors are potentially good candidates for regulating these genes. CONCLUSIONS Target engineering of cell walls to improve plant product quality requires good knowledge of the genes responsible for the production of the main polymers. For bast fiber plants such as flax, it is important to target the correct genes from the beginning since the difficulty to produce transgenic material does not make possible to test a large number of genes. Our work determined which of these genes could be potentially modified and showed that it was possible to target different regulatory pathways to modify lignification.
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Affiliation(s)
- Julien Le Roy
- University of Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Anne-Sophie Blervacq
- University of Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Anne Créach
- University of Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Brigitte Huss
- University of Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Simon Hawkins
- University of Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Godfrey Neutelings
- University of Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France.
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miR319, miR390, and miR393 Are Involved in Aluminum Response in Flax ( Linum usitatissimum L.). BIOMED RESEARCH INTERNATIONAL 2017; 2017:4975146. [PMID: 28299328 PMCID: PMC5337325 DOI: 10.1155/2017/4975146] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 01/06/2017] [Accepted: 01/29/2017] [Indexed: 11/22/2022]
Abstract
Acid soils limit agricultural production worldwide. Major reason of crop losses in acid soils is the toxicity of aluminum (Al). In the present work, we investigated expression alterations of microRNAs in flax (Linum usitatissimum L.) plants under Al stress. Flax seedlings of resistant (TMP1919 and G1071/4_k) and sensitive (Lira and G1071/4_o) to Al cultivars and lines were exposed to AlCl3 solution for 4 and 24 hours. Twelve small RNA libraries were constructed and sequenced using Illumina platform. In total, 97 microRNAs from 18 conserved families were identified. miR319, miR390, and miR393 revealed expression alterations associated with Al treatment of flax plants. Moreover, for miR390 and miR393, the alterations were distinct in sensitive and resistant to Al genotypes. Expression level changes of miR319 and miR390 were confirmed using qPCR analysis. In flax, potential targets of miR319 are TCPs, miR390–TAS3 and GRF5, and miR393–AFB2-coding transcripts. TCPs, TAS3, GRF5, and AFB2 participate in regulation of plant growth and development. The involvement of miR319, miR390, and miR393 in response to Al stress in flax was shown here for the first time. We speculate that these microRNAs play an important role in Al response via regulation of growth processes in flax plants.
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Yu Y, Wu G, Yuan H, Cheng L, Zhao D, Huang W, Zhang S, Zhang L, Chen H, Zhang J, Guan F. Identification and characterization of miRNAs and targets in flax (Linum usitatissimum) under saline, alkaline, and saline-alkaline stresses. BMC PLANT BIOLOGY 2016; 16:124. [PMID: 27234464 PMCID: PMC4884397 DOI: 10.1186/s12870-016-0808-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 05/17/2016] [Indexed: 05/19/2023]
Abstract
BACKGROUND MicroRNAs (miRNAs) play a critical role in responses to biotic and abiotic stress and have been characterized in a large number of plant species. Although flax (Linum usitatissimum L.) is one of the most important fiber and oil crops worldwide, no reports have been published describing flax miRNAs (Lus-miRNAs) induced in response to saline, alkaline, and saline-alkaline stresses. RESULTS In this work, combined small RNA and degradome deep sequencing was used to analyze flax libraries constructed after alkaline-salt stress (AS2), neutral salt stress (NSS), alkaline stress (AS), and the non-stressed control (CK). From the CK, AS, AS2, and NSS libraries, a total of 118, 119, 122, and 120 known Lus-miRNAs and 233, 213, 211, and 212 novel Lus-miRNAs were isolated, respectively. After assessment of differential expression profiles, 17 known Lus-miRNAs and 36 novel Lus-miRNAs were selected and used to predict putative target genes. Gene ontology term enrichment analysis revealed target genes that were involved in responses to stimuli, including signaling and catalytic activity. Eight Lus-miRNAs were selected for analysis using qRT-PCR to confirm the accuracy and reliability of the miRNA-seq results. The qRT-PCR results showed that changes in stress-induced expression profiles of these miRNAs mirrored expression trends observed using miRNA-seq. Degradome sequencing and transcriptome profiling showed that expression of 29 miRNA-target pairs displayed inverse expression patterns under saline, alkaline, and saline-alkaline stresses. From the target prediction analysis, the miR398a-targeted gene codes for a copper/zinc superoxide dismutase, and the miR530 has been shown to explicitly target WRKY family transcription factors, which suggesting that these two micRNAs and their targets may significant involve in the saline, alkaline, and saline-alkaline stress response in flax. CONCLUSIONS Identification and characterization of flax miRNAs, their target genes, functional annotations, and gene expression patterns are reported in this work. These findings will enhance our understanding of flax miRNA regulatory mechanisms under saline, alkaline, and saline-alkaline stresses and provide a foundation for future elucidation of the specific functions of these miRNAs.
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Affiliation(s)
- Ying Yu
- Heilongjiang Academy of Agricultural Sciences Postdoctoral Programme, Harbin, 150086, People's Republic of China
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China
| | - Guangwen Wu
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China
| | - Hongmei Yuan
- Heilongjiang Academy of Agricultural Sciences Postdoctoral Programme, Harbin, 150086, People's Republic of China
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China
| | - Lili Cheng
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China
| | - Dongsheng Zhao
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China
| | - Wengong Huang
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China
| | - Shuquan Zhang
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China
| | - Liguo Zhang
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China
| | - Hongyu Chen
- Division of Insect-borne Parastitic Disease Control and Prevention, Harbin Center for Disease Control and Prevention, Harbin, 150056, People's Republic of China
| | - Jian Zhang
- Alberta Innovates Technology Futures, Vegreville, Alberta, T9C 1 T4, Canada.
| | - Fengzhi Guan
- Heilongjiang Academy of Agricultural Sciences Postdoctoral Programme, Harbin, 150086, People's Republic of China.
- Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, People's Republic of China.
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Ražná K, Bežo M, Hlavačková L, Žiarovská J, Miko M, Gažo J, Habán M. MicroRNA (miRNA) in food resources and medicinal plant. POTRAVINARSTVO 2016. [DOI: 10.5219/583] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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16
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Melnikova NV, Dmitriev AA, Belenikin MS, Koroban NV, Speranskaya AS, Krinitsina AA, Krasnov GS, Lakunina VA, Snezhkina AV, Sadritdinova AF, Kishlyan NV, Rozhmina TA, Klimina KM, Amosova AV, Zelenin AV, Muravenko OV, Bolsheva NL, Kudryavtseva AV. Identification, Expression Analysis, and Target Prediction of Flax Genotroph MicroRNAs Under Normal and Nutrient Stress Conditions. FRONTIERS IN PLANT SCIENCE 2016; 7:399. [PMID: 27092149 PMCID: PMC4821855 DOI: 10.3389/fpls.2016.00399] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 03/14/2016] [Indexed: 05/19/2023]
Abstract
Cultivated flax (Linum usitatissimum L.) is an important plant valuable for industry. Some flax lines can undergo heritable phenotypic and genotypic changes (LIS-1 insertion being the most common) in response to nutrient stress and are called plastic lines. Offspring of plastic lines, which stably inherit the changes, are called genotrophs. MicroRNAs (miRNAs) are involved in a crucial regulatory mechanism of gene expression. They have previously been assumed to take part in nutrient stress response and can, therefore, participate in genotroph formation. In the present study, we performed high-throughput sequencing of small RNAs (sRNAs) extracted from flax plants grown under normal, phosphate deficient and nutrient excess conditions to identify miRNAs and evaluate their expression. Our analysis revealed expression of 96 conserved miRNAs from 21 families in flax. Moreover, 475 novel potential miRNAs were identified for the first time, and their targets were predicted. However, none of the identified miRNAs were transcribed from LIS-1. Expression of seven miRNAs (miR168, miR169, miR395, miR398, miR399, miR408, and lus-miR-N1) with up- or down-regulation under nutrient stress (on the basis of high-throughput sequencing data) was evaluated on extended sampling using qPCR. Reference gene search identified ETIF3H and ETIF3E genes as most suitable for this purpose. Down-regulation of novel potential lus-miR-N1 and up-regulation of conserved miR399 were revealed under the phosphate deficient conditions. In addition, the negative correlation of expression of lus-miR-N1 and its predicted target, ubiquitin-activating enzyme E1 gene, as well as, miR399 and its predicted target, ubiquitin-conjugating enzyme E2 gene, was observed. Thus, in our study, miRNAs expressed in flax plastic lines and genotrophs were identified and their expression and expression of their targets was evaluated using high-throughput sequencing and qPCR for the first time. These data provide new insights into nutrient stress response regulation in plastic flax cultivars.
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Affiliation(s)
- Nataliya V. Melnikova
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Alexey A. Dmitriev
- Laboratory of Structural and Functional Genomics, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Maxim S. Belenikin
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
- Department of Higher Plants, Lomonosov Moscow State UniversityMoscow, Russia
| | - Nadezhda V. Koroban
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Anna S. Speranskaya
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
- Department of Higher Plants, Lomonosov Moscow State UniversityMoscow, Russia
| | | | - George S. Krasnov
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Valentina A. Lakunina
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Anastasiya V. Snezhkina
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Asiya F. Sadritdinova
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Natalya V. Kishlyan
- Laboratory of Genetics, All-Russian Research Institute for FlaxTorzhok, Russia
| | - Tatiana A. Rozhmina
- Laboratory of Genetics, All-Russian Research Institute for FlaxTorzhok, Russia
| | - Kseniya M. Klimina
- Laboratory of Genetics of Microorganisms, Vavilov Institute of General Genetics, Russian Academy of SciencesMoscow, Russia
| | - Alexandra V. Amosova
- Laboratory of Molecular Karyology, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Alexander V. Zelenin
- Laboratory of Molecular Karyology, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Olga V. Muravenko
- Laboratory of Molecular Karyology, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Nadezhda L. Bolsheva
- Laboratory of Molecular Karyology, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Anna V. Kudryavtseva
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
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17
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Melnikova NV, Dmitriev AA, Belenikin MS, Speranskaya AS, Krinitsina AA, Rachinskaia OA, Lakunina VA, Krasnov GS, Snezhkina AV, Sadritdinova AF, Uroshlev LA, Koroban NV, Samatadze TE, Amosova AV, Zelenin AV, Muravenko OV, Bolsheva NL, Kudryavtseva AV. Excess fertilizer responsive miRNAs revealed in Linum usitatissimum L. Biochimie 2015; 109:36-41. [DOI: 10.1016/j.biochi.2014.11.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 11/26/2014] [Indexed: 10/24/2022]
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Huang Y, Zou Q, Ren HT, Sun XH. Prediction and characterization of microRNAs from eleven fish species by computational methods. Saudi J Biol Sci 2014; 22:374-81. [PMID: 26150741 PMCID: PMC4486735 DOI: 10.1016/j.sjbs.2014.10.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/09/2014] [Accepted: 10/14/2014] [Indexed: 12/02/2022] Open
Abstract
MicroRNAs (miRNAs) are a family of single-stranded RNA molecules about 22 nt in length, which can regulate protein-coding gene expression in various organisms by post-transcriptional repression of messenger. In this research, the potential miRNAs and their target genes were analyzed and predicted by computational methods from the EST and GSS databases of eleven fish species, 43 potential miRNAs were identified, they belong to 38 miRNA families, some miRNAs are highly conserved in animal kingdom, the predicted target genes are involved in development, signal transduction, response to environmental stress and pathogen invasion. Taken together, our data suggest that there are a plentiful of miRNAs in these eleven fish species, these miRNAs may play some important roles by regulating their target genes, and the data provide important information for further functional studies.
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Affiliation(s)
- Yong Huang
- Animal Science and Technology College, Henan University of Science and Technology, Luoyang City 471003, Henan Province, PR China
| | - Quan Zou
- School of Information Science and Technology of Xiamen University, Xiamen City 361005, Fujian Province, PR China
| | - Hong Tao Ren
- Animal Science and Technology College, Henan University of Science and Technology, Luoyang City 471003, Henan Province, PR China
| | - Xi Hong Sun
- Animal Science and Technology College, Henan University of Science and Technology, Luoyang City 471003, Henan Province, PR China
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Han J, Xie H, Sun Q, Wang J, Lu M, Wang W, Guo E, Pan J. Bioinformatic identification and experimental validation of miRNAs from foxtail millet (Setaria italica). Gene 2014; 546:367-77. [PMID: 24862217 DOI: 10.1016/j.gene.2014.05.050] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 05/20/2014] [Accepted: 05/22/2014] [Indexed: 02/06/2023]
Abstract
MiRNAs are a novel group of non-coding small RNAs that negatively regulate gene expression. Many miRNAs have been identified and investigated extensively in plant species with sequenced genomes. However, few miRNAs have been identified in foxtail millet (Setaria italica), which is an ancient cereal crop of great importance for dry land agriculture. In this study, 271 foxtail millet miRNAs belonging to 44 families were identified using a bioinformatics approach. Twenty-three pairs of sense/antisense miRNAs belonging to 13 families, and 18 miRNA clusters containing members of 8 families were discovered in foxtail millet. We identified 432 potential targets for 38 miRNA families, most of which were predicted to be involved in plant development, signal transduction, metabolic pathways, disease resistance, and environmental stress responses. Gene ontology (GO) analysis revealed that 101, 56, and 23 target genes were involved in molecular functions, biological processes, and cellular components, respectively. We investigated the expression patterns of 43 selected miRNAs using qRT-PCR analysis. All of the miRNAs were expressed ubiquitously with many exhibiting different expression levels in different tissues. We validated five predicted targets of four miRNAs using the RNA ligase mediated rapid amplification of cDNA end (5'-RLM-RACE) method.
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Affiliation(s)
- Jun Han
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China.
| | - Hao Xie
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Qingpeng Sun
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Jun Wang
- Millet Research Institute, Shanxi Academy of Agricultural Sciences, Changzhi 046011, China
| | - Min Lu
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Weixiang Wang
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Erhu Guo
- Millet Research Institute, Shanxi Academy of Agricultural Sciences, Changzhi 046011, China
| | - Jinbao Pan
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China.
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Gea G, Kjell S, Jean-François H. Integrated -omics: a powerful approach to understanding the heterogeneous lignification of fibre crops. Int J Mol Sci 2013; 14:10958-78. [PMID: 23708098 PMCID: PMC3709712 DOI: 10.3390/ijms140610958] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 05/15/2013] [Accepted: 05/17/2013] [Indexed: 12/15/2022] Open
Abstract
Lignin and cellulose represent the two main components of plant secondary walls and the most abundant polymers on Earth. Quantitatively one of the principal products of the phenylpropanoid pathway, lignin confers high mechanical strength and hydrophobicity to plant walls, thus enabling erect growth and high-pressure water transport in the vessels. Lignin is characterized by a high natural heterogeneity in its composition and abundance in plant secondary cell walls, even in the different tissues of the same plant. A typical example is the stem of fibre crops, which shows a lignified core enveloped by a cellulosic, lignin-poor cortex. Despite the great value of fibre crops for humanity, however, still little is known on the mechanisms controlling their cell wall biogenesis, and particularly, what regulates their spatially-defined lignification pattern. Given the chemical complexity and the heterogeneous composition of fibre crops' secondary walls, only the use of multidisciplinary approaches can convey an integrated picture and provide exhaustive information covering different levels of biological complexity. The present review highlights the importance of combining high throughput -omics approaches to get a complete understanding of the factors regulating the lignification heterogeneity typical of fibre crops.
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Affiliation(s)
- Guerriero Gea
- Department Environment and Agro-biotechnologies (EVA), Centre de Recherche Public-Gabriel Lippmann, 41, Rue du Brill, L-4422 Belvaux, Luxembourg; E-Mails: (G.G.); (S.K.)
| | - Sergeant Kjell
- Department Environment and Agro-biotechnologies (EVA), Centre de Recherche Public-Gabriel Lippmann, 41, Rue du Brill, L-4422 Belvaux, Luxembourg; E-Mails: (G.G.); (S.K.)
| | - Hausman Jean-François
- Department Environment and Agro-biotechnologies (EVA), Centre de Recherche Public-Gabriel Lippmann, 41, Rue du Brill, L-4422 Belvaux, Luxembourg; E-Mails: (G.G.); (S.K.)
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Barvkar VT, Pardeshi VC, Kale SM, Qiu S, Rollins M, Datla R, Gupta VS, Kadoo NY. Genome-wide identification and characterization of microRNA genes and their targets in flax (Linum usitatissimum): Characterization of flax miRNA genes. PLANTA 2013; 237:1149-61. [PMID: 23291876 DOI: 10.1007/s00425-012-1833-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Accepted: 12/18/2012] [Indexed: 05/11/2023]
Abstract
MicroRNAs (miRNAs) are small (20-24 nucleotide long) endogenous regulatory RNAs that play important roles in plant growth and development. They regulate gene expression at the post-transcriptional level by translational repression or target degradation and gene silencing. In this study, we identified 116 conserved miRNAs belonging to 23 families from the flax (Linum usitatissimum L.) genome using a computational approach. The precursor miRNAs varied in length; while most of the mature miRNAs were 21 nucleotide long, intergenic and showed conserved signatures of RNA polymerase II transcripts in their upstream regions. Promoter region analysis of the flax miRNA genes indicated prevalence of MYB transcription factor binding sites. Four miRNA gene clusters containing members of three phylogenetic groups were identified. Further, 142 target genes were predicted for these miRNAs and most of these represent transcriptional regulators. The miRNA encoding genes were expressed in diverse tissues as determined by digital expression analysis as well as real-time PCR. The expression of fourteen miRNAs and nine target genes was independently validated using the quantitative reverse transcription PCR (qRT-PCR). This study suggests that a large number of conserved plant miRNAs are also found in flax and these may play important roles in growth and development of flax.
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Affiliation(s)
- Vitthal T Barvkar
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Pune, 411008, India
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