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  1. Artikel ; Online: Laser capture microdissection to study Bacillus cereus iron homeostasis gene expression during Galleria mellonella in vivo gut colonization.

    Consentino, Laurent / Rejasse, Agnès / Crapart, Nicolas / Bevilacqua, Claudia / Nielsen-LeRoux, Christina

    Virulence

    2021  Band 12, Heft 1, Seite(n) 2104–2121

    Abstract: ... Bacillus ... ...

    Abstract Bacillus cereus
    Mesh-Begriff(e) Animals ; Bacillus cereus/genetics ; Bacillus cereus/physiology ; Bacterial Proteins/genetics ; Gene Expression Regulation, Bacterial ; Homeostasis ; Iron/metabolism ; Larva ; Laser Capture Microdissection ; Moths/microbiology ; RNA, Messenger ; Reproducibility of Results
    Chemische Substanzen Bacterial Proteins ; RNA, Messenger ; Iron (E1UOL152H7)
    Sprache Englisch
    Erscheinungsdatum 2021-08-09
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2657572-3
    ISSN 2150-5608 ; 2150-5594
    ISSN (online) 2150-5608
    ISSN 2150-5594
    DOI 10.1080/21505594.2021.1959790
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel: Soil Photosynthetic Microbial Communities Mediate Aggregate Stability: Influence of Cropping Systems and Herbicide Use in an Agricultural Soil.

    Crouzet, Olivier / Consentino, Laurent / Pétraud, Jean-Pierre / Marrauld, Christelle / Aguer, Jean-Pierre / Bureau, Sylvie / Le Bourvellec, Carine / Touloumet, Line / Bérard, Annette

    Frontiers in microbiology

    2019  Band 10, Seite(n) 1319

    Abstract: Edaphic cyanobacteria and algae have been extensively studied in dryland soils because they play key roles in the formation of biological soil crusts and the stabilization of soil surfaces. Yet, in temperate agricultural crop soils, little is understood ... ...

    Abstract Edaphic cyanobacteria and algae have been extensively studied in dryland soils because they play key roles in the formation of biological soil crusts and the stabilization of soil surfaces. Yet, in temperate agricultural crop soils, little is understood about the functional significance of indigenous photosynthetic microbial communities for various soil processes. This study investigated how indigenous soil algae and cyanobacteria affected topsoil aggregate stability in cereal cropping systems. Topsoil aggregates from conventional and organic cropping systems were incubated in microcosms under dark or photoperiodic conditions with or without a treatment with an herbicide (isoproturon). Physicochemical parameters (bound exopolysaccharides, organic carbon) and microbial parameters (esterase activity, chlorophyll
    Originality/significance: Edaphic algal and cyanobacterial communities are known to form photosynthetic microbial crusts in arid soils, where they drive key ecosystem functions. Although less well characterized, such communities are also transiently abundant in temperate and mesic cropped soils. This microcosm study investigated the communities' functional significance in topsoil aggregate formation and stabilization in two temperate cropping systems. Overall, our results showed that the development of indigenous microalgal communities under our experimental conditions drove higher structural stability in topsoil aggregates in temperate cropland soils. Also, herbicide use affected photosynthetic microbial communities and consequently impaired soil aggregation.
    Sprache Englisch
    Erscheinungsdatum 2019-06-14
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2019.01319
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Blue‐light dependent reactive oxygen species formation by Arabidopsis cryptochrome may define a novel evolutionarily conserved signaling mechanism

    Consentino, Laurent / Lambert, Stefan / Martino, Carlos / Jourdan, Nathalie / Bouchet, Pierre‐Etienne / Witczak, Jacques / Castello, Pablo / El‐Esawi, Mohamed / Corbineau, Francoise / d'Harlingue, Alain / Ahmad, Margaret

    new phytologist. 2015 June, v. 206, no. 4

    2015  

    Abstract: Cryptochromes are widespread blue‐light absorbing flavoproteins with important signaling roles. In plants they mediate de‐etiolation, developmental and stress responses resulting from interaction with downstream signaling partners such as transcription ... ...

    Abstract Cryptochromes are widespread blue‐light absorbing flavoproteins with important signaling roles. In plants they mediate de‐etiolation, developmental and stress responses resulting from interaction with downstream signaling partners such as transcription factors and components of the proteasome. Recently, it has been shown that Arabidopsis cry1 activation by blue light also results in direct enzymatic conversion of molecular oxygen (O₂) to reactive oxygen species (ROS) and hydrogen peroxide (H₂O₂) in vitro. Here we explored whether direct enzymatic synthesis of ROS by Arabidopsis cry1 can play a physiological role in vivo. ROS formation resulting from cry1 expression was measured by fluorescence assay in insect cell cultures and in Arabidopsis protoplasts from cryptochrome mutant seedlings. Cell death was determined by colorimetric assay. We found that ROS formation results from cry1 activation and induces cell death in insect cell cultures. In plant protoplasts, cryptochrome activation results in rapid increase in ROS formation and cell death. We conclude that ROS formation by cryptochromes may indeed be of physiological relevance and could represent a novel paradigm for cryptochrome signaling.
    Schlagwörter Arabidopsis ; blue light ; cell culture ; cell death ; colorimetry ; cryptochromes ; etiolation ; fluorescence ; hydrogen peroxide ; insects ; mutants ; oxygen ; proteasome endopeptidase complex ; protoplasts ; seedlings ; stress response ; transcription factors
    Sprache Englisch
    Erscheinungsverlauf 2015-06
    Umfang p. 1450-1462.
    Erscheinungsort Academic Press.
    Dokumenttyp Artikel
    ZDB-ID 208885-x
    ISSN 1469-8137 ; 0028-646X
    ISSN (online) 1469-8137
    ISSN 0028-646X
    DOI 10.1111/nph.13341
    Datenquelle NAL Katalog (AGRICOLA)

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  4. Artikel ; Online: Blue-light dependent reactive oxygen species formation by Arabidopsis cryptochrome may define a novel evolutionarily conserved signaling mechanism.

    Consentino, Laurent / Lambert, Stefan / Martino, Carlos / Jourdan, Nathalie / Bouchet, Pierre-Etienne / Witczak, Jacques / Castello, Pablo / El-Esawi, Mohamed / Corbineau, Francoise / d'Harlingue, Alain / Ahmad, Margaret

    The New phytologist

    2015  Band 206, Heft 4, Seite(n) 1450–1462

    Abstract: Cryptochromes are widespread blue-light absorbing flavoproteins with important signaling roles. In plants they mediate de-etiolation, developmental and stress responses resulting from interaction with downstream signaling partners such as transcription ... ...

    Abstract Cryptochromes are widespread blue-light absorbing flavoproteins with important signaling roles. In plants they mediate de-etiolation, developmental and stress responses resulting from interaction with downstream signaling partners such as transcription factors and components of the proteasome. Recently, it has been shown that Arabidopsis cry1 activation by blue light also results in direct enzymatic conversion of molecular oxygen (O2 ) to reactive oxygen species (ROS) and hydrogen peroxide (H2 O2 ) in vitro. Here we explored whether direct enzymatic synthesis of ROS by Arabidopsis cry1 can play a physiological role in vivo. ROS formation resulting from cry1 expression was measured by fluorescence assay in insect cell cultures and in Arabidopsis protoplasts from cryptochrome mutant seedlings. Cell death was determined by colorimetric assay. We found that ROS formation results from cry1 activation and induces cell death in insect cell cultures. In plant protoplasts, cryptochrome activation results in rapid increase in ROS formation and cell death. We conclude that ROS formation by cryptochromes may indeed be of physiological relevance and could represent a novel paradigm for cryptochrome signaling.
    Mesh-Begriff(e) Arabidopsis/drug effects ; Arabidopsis/metabolism ; Arabidopsis/radiation effects ; Arabidopsis Proteins/metabolism ; Biological Evolution ; Cell Death/drug effects ; Cell Survival/drug effects ; Cell Survival/radiation effects ; Cryptochromes/metabolism ; Light ; Oxygen/pharmacology ; Protoplasts/drug effects ; Protoplasts/metabolism ; Reactive Oxygen Species/metabolism ; Recombination, Genetic/genetics ; Sf9 Cells ; Signal Transduction/drug effects ; Signal Transduction/radiation effects ; Subcellular Fractions/drug effects ; Subcellular Fractions/metabolism
    Chemische Substanzen Arabidopsis Proteins ; CRY1 protein, Arabidopsis ; Cryptochromes ; Reactive Oxygen Species ; Oxygen (S88TT14065)
    Sprache Englisch
    Erscheinungsdatum 2015-02-26
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 208885-x
    ISSN 1469-8137 ; 0028-646X
    ISSN (online) 1469-8137
    ISSN 0028-646X
    DOI 10.1111/nph.13341
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel: Blue‐light dependent reactive oxygen species formation by Arabidopsis cryptochrome may define a novel evolutionarily conserved signaling mechanism

    Consentino, Laurent / Lambert, Stefan / Martino, Carlos / Jourdan, Nathalie / Bouchet, Pierre‐Etienne / Witczak, Jacques / Castello, Pablo / El‐Esawi, Mohamed / Corbineau, Francoise / d'Harlingue, Alain / Ahmad, Margaret

    new phytologist

    Band v. 206,, Heft no. 4

    Abstract: Cryptochromes are widespread blue‐light absorbing flavoproteins with important signaling roles. In plants they mediate de‐etiolation, developmental and stress responses resulting from interaction with downstream signaling partners such as transcription ... ...

    Abstract Cryptochromes are widespread blue‐light absorbing flavoproteins with important signaling roles. In plants they mediate de‐etiolation, developmental and stress responses resulting from interaction with downstream signaling partners such as transcription factors and components of the proteasome. Recently, it has been shown that Arabidopsis cry1 activation by blue light also results in direct enzymatic conversion of molecular oxygen (O₂) to reactive oxygen species (ROS) and hydrogen peroxide (H₂O₂) in vitro. Here we explored whether direct enzymatic synthesis of ROS by Arabidopsis cry1 can play a physiological role in vivo. ROS formation resulting from cry1 expression was measured by fluorescence assay in insect cell cultures and in Arabidopsis protoplasts from cryptochrome mutant seedlings. Cell death was determined by colorimetric assay. We found that ROS formation results from cry1 activation and induces cell death in insect cell cultures. In plant protoplasts, cryptochrome activation results in rapid increase in ROS formation and cell death. We conclude that ROS formation by cryptochromes may indeed be of physiological relevance and could represent a novel paradigm for cryptochrome signaling.
    Schlagwörter cell culture ; cell death ; blue light ; oxygen ; protoplasts ; transcription factors ; insects ; stress response ; seedlings ; mutants ; proteasome endopeptidase complex ; fluorescence ; colorimetry ; etiolation ; hydrogen peroxide ; Arabidopsis ; cryptochromes
    Sprache Englisch
    Dokumenttyp Artikel
    ISSN 0028-646X
    Datenquelle AGRIS - International Information System for the Agricultural Sciences and Technology

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