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  1. Article ; Online: Phytolith Content Negatively Affects Forage Quality of Eragrostis curvula (Schrad.) Nees

    Gallardo, Jimena / Diaz, Marina / Carballo, José / Garayalde, Antonio / Echenique, Viviana

    Agronomy. 2023 Mar. 21, v. 13, no. 3

    2023  

    Abstract: Phytoliths are intra and extracellular siliceous deposits present in different plant tissues. Si uptake and transport are mediated by Lsi genes and its concentration is associated with forage quality. Our objective was to determine the phytolith content ... ...

    Abstract Phytoliths are intra and extracellular siliceous deposits present in different plant tissues. Si uptake and transport are mediated by Lsi genes and its concentration is associated with forage quality. Our objective was to determine the phytolith content in seven Eragrostis curvula genotypes at the outbreak and re-growth stages to assess its relationship with the forage quality parameters and perform a genome-wide analysis to detect the presence/absence of Lsi genes. The mean values of the phytolith content of dry matter varied between 1.94–2.26% and 2.72–4.71% at the outbreak and re-growth stages, respectively, with highly significant differences among the genotypes and phenological stages. A highly negative correlation was observed in the phytolith content and in vitro dry matter digestibility and crude protein, revealing its importance as a selection parameter in breeding programs. A positive correlation was obtained between the phytolith content and lignin, neutral detergent fiber, and acid detergent fiber. The main morphotypes of the phytoliths included saddle-shaped, bulliform, and acicular cells. Genes Lsi1, Lsi2, Lsi3, and Lsi6, previously reported in silica uptake, were identified and compared with related species, being the gene sequences highly conserved, meaning that its accumulation is probably due to differences in the gene expression or different allelic variants among cultivars.
    Keywords Eragrostis curvula ; acid detergent fiber ; agronomy ; crude protein ; cultivars ; dry matter content ; dry matter digestibility ; forage quality ; gene expression ; genes ; genome-wide association study ; lignin ; morphs ; neutral detergent fiber ; phenology ; phytoliths ; silica
    Language English
    Dates of publication 2023-0321
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2607043-1
    ISSN 2073-4395
    ISSN 2073-4395
    DOI 10.3390/agronomy13030924
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: A combined transcriptome - miRNAome approach revealed that a

    Pasten, María Cielo / Carballo, José / Gallardo, Jimena / Zappacosta, Diego / Selva, Juan Pablo / Rodrigo, Juan Manuel / Echenique, Viviana / Garbus, Ingrid

    Frontiers in plant science

    2022  Volume 13, Page(s) 1012682

    Abstract: Weeping lovegrass ( ...

    Abstract Weeping lovegrass (
    Language English
    Publishing date 2022-09-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2613694-6
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2022.1012682
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Differential Methylation Patterns in Apomictic vs. Sexual Genotypes of the Diplosporous Grass

    Carballo, Jose / Zappacosta, Diego / Marconi, Gianpiero / Gallardo, Jimena / Di Marsico, Marco / Gallo, Cristian A / Caccamo, Mario / Albertini, Emidio / Echenique, Viviana

    Plants (Basel, Switzerland)

    2021  Volume 10, Issue 5

    Abstract: DNA methylation is an epigenetic mechanism by which a methyl group is added to a cytosine or an adenine. When located in a gene/regulatory sequence it may repress or de-repress genes, depending on the context and species. ...

    Abstract DNA methylation is an epigenetic mechanism by which a methyl group is added to a cytosine or an adenine. When located in a gene/regulatory sequence it may repress or de-repress genes, depending on the context and species.
    Language English
    Publishing date 2021-05-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants10050946
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Differential Methylation Patterns in Apomictic vs. Sexual Genotypes of the Diplosporous Grass Eragrostis curvula

    Carballo, Jose / Zappacosta, Diego / Marconi, Gianpiero / Gallardo, Jimena / Di Marsico, Marco / Gallo, Cristian A / Caccamo, Mario / Albertini, Emidio / Echenique, Viviana

    Plants. 2021 May 10, v. 10, no. 5

    2021  

    Abstract: DNA methylation is an epigenetic mechanism by which a methyl group is added to a cytosine or an adenine. When located in a gene/regulatory sequence it may repress or de-repress genes, depending on the context and species. Eragrostis curvula is an ... ...

    Abstract DNA methylation is an epigenetic mechanism by which a methyl group is added to a cytosine or an adenine. When located in a gene/regulatory sequence it may repress or de-repress genes, depending on the context and species. Eragrostis curvula is an apomictic grass in which facultative genotypes increases the frequency of sexual pistils triggered by epigenetic mechanisms. The aim of the present study was to look for correlations between the reproductive mode and specific methylated genes or genomic regions. To do so, plants with contrasting reproductive modes were investigated through MCSeEd (Methylation Context Sensitive Enzyme ddRad) showing higher levels of DNA methylation in apomictic genotypes. Moreover, an increased proportion of differentially methylated positions over the regulatory regions were observed, suggesting its possible role in regulation of gene expression. Interestingly, the methylation pathway was also found to be self-regulated since two of the main genes (ROS1 and ROS4), involved in de-methylation, were found differentially methylated between genotypes with different reproductive behavior. Moreover, this work allowed us to detect several genes regulated by methylation that were previously found as differentially expressed in the comparisons between apomictic and sexual genotypes, linking DNA methylation to differences in reproductive mode.
    Keywords DNA methylation ; Eragrostis curvula ; adenine ; cytosine ; enzymes ; epigenetics ; gene expression regulation ; genes ; genomics ; grasses ; reproductive behavior
    Language English
    Dates of publication 2021-0510
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants10050946
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Genes Modulating the Increase in Sexuality in the Facultative Diplosporous Grass

    Selva, Juan Pablo / Zappacosta, Diego / Carballo, José / Rodrigo, Juan Manuel / Bellido, Andrés / Gallo, Cristian Andrés / Gallardo, Jimena / Echenique, Viviana

    Genes

    2020  Volume 11, Issue 9

    Abstract: Eragrostis ... ...

    Abstract Eragrostis curvula
    MeSH term(s) Apomixis ; Droughts ; Eragrostis/genetics ; Eragrostis/physiology ; Gene Expression Regulation, Plant ; Plant Proteins/genetics ; Plant Proteins/metabolism ; Sequence Analysis, RNA ; Stress, Physiological ; Transcriptome
    Chemical Substances Plant Proteins
    Language English
    Publishing date 2020-08-21
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2527218-4
    ISSN 2073-4425 ; 2073-4425
    ISSN (online) 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes11090969
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Genes Modulating the Increase in Sexuality in the Facultative Diplosporous Grass Eragrostis curvula under Water Stress Conditions

    Selva, Juan Pablo / Zappacosta, Diego / Carballo, José / Rodrigo, Juan Manuel / Bellido, Andrés / Gallo, Cristian Andrés / Gallardo, Jimena / Echenique, Viviana

    Genes. 2020 Aug. 21, v. 11, no. 9

    2020  

    Abstract: Eragrostis curvula presents mainly facultative genotypes that reproduce by diplosporous apomixis, retaining a percentage of sexual pistils that increase under drought and other stressful situations, indicating that some regulators activated by stress ... ...

    Abstract Eragrostis curvula presents mainly facultative genotypes that reproduce by diplosporous apomixis, retaining a percentage of sexual pistils that increase under drought and other stressful situations, indicating that some regulators activated by stress could be affecting the apomixis/sexual switch. Water stress experiments were performed in order to associate the increase in sexual embryo sacs with the differential expression of genes in a facultative apomictic cultivar using cytoembryology and RNA sequencing. The percentage of sexual embryo sacs increased from 4 to 24% and 501 out of the 201,011 transcripts were differentially expressed (DE) between control and stressed plants. DE transcripts were compared with previous transcriptomes where apomictic and sexual genotypes were contrasted. The results point as candidates to transcripts related to methylation, ubiquitination, hormone and signal transduction pathways, transcription regulation and cell wall biosynthesis, some acting as a general response to stress and some that are specific to the reproductive mode. We suggest that a DNA glycosylase EcROS1-like could be demethylating, thus de-repressing a gene or genes involved in the sexuality pathways. Many of the other DE transcripts could be part of a complex mechanism that regulates apomixis and sexuality in this grass, the ones in the intersection between control/stress and apo/sex being the strongest candidates.
    Keywords Eragrostis curvula ; N-glycoside hydrolases ; apomixis ; biosynthesis ; cell walls ; cultivars ; drought ; gene expression ; gene expression regulation ; genes ; genotype ; grasses ; messenger RNA ; methylation ; pistil ; sequence analysis ; signal transduction ; stress response ; transcription (genetics) ; transcriptome ; ubiquitination ; water stress
    Language English
    Dates of publication 2020-0821
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2527218-4
    ISSN 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes11090969
    Database NAL-Catalogue (AGRICOLA)

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  7. Article: A High-Density Linkage Map of the Forage Grass

    Zappacosta, Diego / Gallardo, Jimena / Carballo, José / Meier, Mauro / Rodrigo, Juan Manuel / Gallo, Cristian A / Selva, Juan Pablo / Stein, Juliana / Ortiz, Juan Pablo A / Albertini, Emidio / Echenique, Viviana

    Frontiers in plant science

    2019  Volume 10, Page(s) 918

    Abstract: Eragrostis ... ...

    Abstract Eragrostis curvula
    Language English
    Publishing date 2019-07-12
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711035-7
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2019.00918
    Database MEDical Literature Analysis and Retrieval System OnLINE

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