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  1. Article ; Online: Then and now.

    Amtmann, Anna

    Plant, cell & environment

    2019  Volume 42, Issue 10, Page(s) 2747–2749

    MeSH term(s) Botany ; Germination ; Global Warming ; Microbiota ; Plant Development ; Plant Physiological Phenomena ; Plants/metabolism ; Seeds/growth & development ; Stress, Physiological ; Temperature
    Language English
    Publishing date 2019-10-11
    Publishing country United States
    Document type Editorial ; Introductory Journal Article
    ZDB-ID 391893-2
    ISSN 1365-3040 ; 0140-7791
    ISSN (online) 1365-3040
    ISSN 0140-7791
    DOI 10.1111/pce.13648
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 80/729: Show issues

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  2. Article ; Online: Epigenetic processes in plant stress priming: Open questions and new approaches.

    Harris, C Jake / Amtmann, Anna / Ton, Jurriaan

    Current opinion in plant biology

    2023  Volume 75, Page(s) 102432

    Abstract: Priming reflects the capacity of plants to memorise environmental stress experience and improve their response to recurring stress. Epigenetic modifications in DNA and associated histone proteins may carry short-term and long-term memory in the same ... ...

    Abstract Priming reflects the capacity of plants to memorise environmental stress experience and improve their response to recurring stress. Epigenetic modifications in DNA and associated histone proteins may carry short-term and long-term memory in the same plant or mediate transgenerational effects, but the evidence is still largely circumstantial. New experimental tools now enable scientists to perform targeted manipulations that either prevent or generate a particular epigenetic modification in a particular location of the genome. Such 'reverse epigenetics' approaches allow for the interrogation of causality between individual priming-induced modifications and their role for altering gene expression and plant performance under recurring stress. Furthermore, combining site-directed epigenetic manipulation with conditional and cell-type specific promoters creates novel opportunities to test and engineer spatiotemporal patterns of priming.
    MeSH term(s) Epigenesis, Genetic ; DNA Methylation ; Plants/genetics ; Histones/genetics ; Stress, Physiological/genetics
    Chemical Substances Histones
    Language English
    Publishing date 2023-07-29
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 1418472-2
    ISSN 1879-0356 ; 1369-5266
    ISSN (online) 1879-0356
    ISSN 1369-5266
    DOI 10.1016/j.pbi.2023.102432
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Book ; Conference proceedings: Effect of potassium nutrition on pest and disease resistance in plants

    Amtmann, Anna / Troufflard, Stephanie / Armengaud, Patrick

    paper presented to The International Fertiliser Society at a conference in Cambridge, on 6th December 2007

    (Proceedings / The International Fertiliser Society ; 610)

    2007  

    Author's details by Anna Amtmann, Stephanie Troufflard and Patrick Armengaud
    Series title Proceedings / The International Fertiliser Society ; 610
    Proceedings / the International Fertiliser Society
    Collection Proceedings / the International Fertiliser Society
    Language English
    Size 20 S., graph. Darst.
    Publisher Internat. Fertiliser Soc
    Publishing place York
    Publishing country Great Britain
    Document type Book ; Conference proceedings
    HBZ-ID HT015478984
    ISBN 978-0-85310-247-2 ; 0-85310-247-3
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    Shelf markLoan statusLocation
    088/405 available for loan (reading room) Freihandmagazin (U1)

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  4. Article ; Online: Root phenotypes for the future.

    Amtmann, Anna / Bennett, Malcolm J / Henry, Amelia

    Plant, cell & environment

    2022  Volume 45, Issue 3, Page(s) 595–601

    MeSH term(s) Phenotype ; Plant Roots
    Language English
    Publishing date 2022-02-17
    Publishing country United States
    Document type Editorial
    ZDB-ID 391893-2
    ISSN 1365-3040 ; 0140-7791
    ISSN (online) 1365-3040
    ISSN 0140-7791
    DOI 10.1111/pce.14269
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  5. Article ; Online: Editorial

    Amtmann, Anna / Bennett, Malcolm J. / Henry, Amelia

    Plant, Cell and Environment

    Root phenotypes for the future

    2023  

    Keywords roots ; phenotypes ; plants ; physiology
    Language English
    Publishing date 2023-01-18T17:12:22Z
    Publisher Wiley
    Publishing country fr
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Environmental modulation of exopolysaccharide production in the cyanobacterium Synechocystis 6803.

    Madsen, Mary Ann / Semerdzhiev, Stefan / Twigg, Jordan D / Moss, Claire / Bavington, Charles D / Amtmann, Anna

    Applied microbiology and biotechnology

    2023  Volume 107, Issue 19, Page(s) 6121–6134

    Abstract: Microorganisms produce extracellular polymeric substances (EPS, also known as exopolysaccharides) of diverse composition and structure. The biochemical and biophysical properties of these biopolymers enable a wide range of industrial applications. EPS ... ...

    Abstract Microorganisms produce extracellular polymeric substances (EPS, also known as exopolysaccharides) of diverse composition and structure. The biochemical and biophysical properties of these biopolymers enable a wide range of industrial applications. EPS from cyanobacteria are particularly versatile as they incorporate a larger number and variety of building blocks and adopt more complex structures than EPS from other organisms. However, the genetic makeup and regulation of EPS biosynthetic pathways in cyanobacteria are poorly understood. Here, we measured the effect of changing culture media on titre and composition of EPS released by Synechocystis sp. PCC 6803, and we integrated this information with transcriptomic data. Across all conditions, daily EPS productivity of individual cells was highest in the early growth phase, but the total amount of EPS obtained from the cultures was highest in the later growth phases due to accumulation. Lowering the magnesium concentration in the media enhanced per-cell productivity but the produced EPS had a lower total sugar content. Levels of individual monosaccharides correlated with specific culture media components, e.g. xylose with sulfur, glucose and N-acetyl-galactosamine with NaCl. Comparison with RNA sequencing data suggests a Wzy-dependent biosynthetic pathway and a protective role for xylose-rich EPS. This multi-level analysis offers a handle to link individual genes to the dynamic modulation of a complex biopolymer. KEY POINTS: • Synechocystis exopolysaccharide amount and composition depends on culture condition • Production rate and sugar content can be modulated by Mg and S respectively • Wzy-dependent biosynthetic pathway and protective role proposed for xylose-rich EPS.
    MeSH term(s) Synechocystis/genetics ; Synechocystis/chemistry ; Xylose/metabolism ; Biopolymers/metabolism ; Monosaccharides/metabolism ; Polysaccharides, Bacterial/chemistry
    Chemical Substances Xylose (A1TA934AKO) ; Biopolymers ; Monosaccharides ; Polysaccharides, Bacterial
    Language English
    Publishing date 2023-08-08
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 392453-1
    ISSN 1432-0614 ; 0171-1741 ; 0175-7598
    ISSN (online) 1432-0614
    ISSN 0171-1741 ; 0175-7598
    DOI 10.1007/s00253-023-12697-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2229: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  7. Article ; Online: Histone Deacetylase Complex 1 and histone 1 epigenetically moderate stress responsiveness of Arabidopsis thaliana seedlings

    Perrella, Giorgio / Fasano, Carlo / Donald, Naomi A. / Daddiego, Loretta / Fang, Weiwei / Martignago, Damiano / Carr, Craig / Conti, Lucio / Herzyk, Pawel / Amtmann, Anna

    New Phytologist. 2024 Jan., v. 241, no. 1 p.166-179

    2024  

    Abstract: Early responses of plants to environmental stress factors prevent damage but can delay growth and development in fluctuating conditions. Optimising these trade‐offs requires tunability of plant responsiveness to environmental signals. We have previously ... ...

    Abstract Early responses of plants to environmental stress factors prevent damage but can delay growth and development in fluctuating conditions. Optimising these trade‐offs requires tunability of plant responsiveness to environmental signals. We have previously reported that Histone Deacetylase Complex 1 (HDC1), which interacts with multiple proteins in histone deacetylation complexes, regulates the stress responsiveness of Arabidopsis seedlings, but the underlying mechanism remained elusive. Here, we show that HDC1 attenuates transcriptome re‐programming in salt‐treated seedlings, and we identify two genes (LEA and MAF5) that inhibit seedling establishment under salt stress downstream of HDC1. HDC1 attenuates their transcriptional induction by salt via a dual mechanism involving H3K9/14 deacetylation and H3K27 trimethylation. The latter, but not the former, was also abolished in a triple knockout mutant of the linker histone H1, which partially mimics the hypersensitivity of the hdc1‐1 mutant to salt stress. Although stress‐induced H3K27me3 accumulation required both H1 and HDC1, it was not fully recovered by complementing hdc1‐1 with a truncated, H1‐binding competent HDC1 suggesting other players or independent inputs. The combined findings reveal a dual brake function of HDC1 via regulating both active and repressive epigenetic marks on stress‐inducible genes. This natural ‘anti‐panic’ device offers a molecular leaver to tune stress responsiveness in plants.
    Keywords Arabidopsis thaliana ; epigenetics ; growth and development ; histone deacetylase ; histones ; hypersensitivity ; mutants ; plant establishment ; salt stress ; transcription (genetics) ; transcriptome
    Language English
    Dates of publication 2024-01
    Size p. 166-179.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 208885-x
    ISSN 1469-8137 ; 0028-646X
    ISSN (online) 1469-8137
    ISSN 0028-646X
    DOI 10.1111/nph.19165
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Cryptic variation in RNA-directed DNA-methylation controls lateral root development when auxin signalling is perturbed.

    Shahzad, Zaigham / Eaglesfield, Ross / Carr, Craig / Amtmann, Anna

    Nature communications

    2020  Volume 11, Issue 1, Page(s) 218

    Abstract: Maintaining the right balance between plasticity and robustness in biological systems is important to allow adaptation while maintaining essential functions. Developmental plasticity of plant root systems has been the subject of intensive research, but ... ...

    Abstract Maintaining the right balance between plasticity and robustness in biological systems is important to allow adaptation while maintaining essential functions. Developmental plasticity of plant root systems has been the subject of intensive research, but the mechanisms underpinning robustness remain unclear. Here, we show that potassium deficiency inhibits lateral root organogenesis by delaying early stages in the formation of lateral root primordia. However, the severity of the symptoms arising from this perturbation varies within a natural population of Arabidopsis and is associated with the genetic variation in CLSY1, a key component of the RNA-directed DNA-methylation machinery. Mechanistically, CLSY1 mediates the transcriptional repression of a negative regulator of root branching, IAA27, and promotes lateral root development when the auxin-dependent proteolysis pathway fails. Our study identifies DNA-methylation-mediated transcriptional repression as a backup system for post-translational protein degradation which ensures robust development and performance of plants in a challenging environment.
    MeSH term(s) Arabidopsis/genetics ; Arabidopsis/metabolism ; Arabidopsis Proteins/genetics ; Arabidopsis Proteins/metabolism ; DNA Methylation ; Gene Expression Regulation, Plant/drug effects ; Indoleacetic Acids/metabolism ; Indoleacetic Acids/pharmacology ; Intracellular Signaling Peptides and Proteins/genetics ; Intracellular Signaling Peptides and Proteins/metabolism ; Organogenesis, Plant/drug effects ; Plant Development/drug effects ; Plant Growth Regulators/genetics ; Plant Growth Regulators/metabolism ; Plant Roots/cytology ; Plant Roots/growth & development ; RNA/metabolism ; Signal Transduction/drug effects
    Chemical Substances Arabidopsis Proteins ; CLASSY1 protein, Arabidopsis ; Indoleacetic Acids ; Intracellular Signaling Peptides and Proteins ; Plant Growth Regulators ; RNA (63231-63-0)
    Language English
    Publishing date 2020-01-10
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-019-13927-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Environmental Regulation of PndbA600, an Auto-Inducible Promoter for Two-Stage Industrial Biotechnology in Cyanobacteria.

    Madsen, Mary Ann / Hamilton, Graham / Herzyk, Pawel / Amtmann, Anna

    Frontiers in bioengineering and biotechnology

    2021  Volume 8, Page(s) 619055

    Abstract: Cyanobacteria are photosynthetic prokaryotes being developed as sustainable platforms that use renewable resources (light, water, and air) for diverse applications in energy, food, environment, and medicine. Despite the attractive promise that ... ...

    Abstract Cyanobacteria are photosynthetic prokaryotes being developed as sustainable platforms that use renewable resources (light, water, and air) for diverse applications in energy, food, environment, and medicine. Despite the attractive promise that cyanobacteria offer to industrial biotechnology, slow growth rates pose a major challenge in processes which typically require large amounts of biomass and are often toxic to the cells. Two-stage cultivation strategies are an attractive solution to prevent any undesired growth inhibition by de-coupling biomass accumulation (stage I) and the industrial process (stage II). In cyanobacteria, two-stage strategies involve costly transfer methods between stages I and II, and little work has been focussed on using the distinct growth and stationary phases of batch cultures to autoregulate stage transition. In the present study, we identified and characterised a growth phase-specific promoter, which can serve as an auto-inducible switch to regulate two-stage bioprocesses in cyanobacteria. First, growth phase-specific genes were identified from a new RNAseq dataset comparing two growth phases and six nutrient conditions in
    Language English
    Publishing date 2021-01-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2719493-0
    ISSN 2296-4185
    ISSN 2296-4185
    DOI 10.3389/fbioe.2020.619055
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Food for thought: how nutrients regulate root system architecture.

    Shahzad, Zaigham / Amtmann, Anna

    Current opinion in plant biology

    2017  Volume 39, Page(s) 80–87

    Abstract: The spatial arrangement of the plant root system (root system architecture, RSA) is very sensitive to edaphic and endogenous signals that report on the nutrient status of soil and plant. Signalling pathways underpinning RSA responses to individual ... ...

    Abstract The spatial arrangement of the plant root system (root system architecture, RSA) is very sensitive to edaphic and endogenous signals that report on the nutrient status of soil and plant. Signalling pathways underpinning RSA responses to individual nutrients, particularly nitrate and phosphate, have been unravelled. Researchers have now started to investigate interactive effects between two or more nutrients on RSA. Several proteins enabling crosstalk between signalling pathways have recently been identified. RSA is potentially an important trait for sustainable and/or marginal agriculture. It is generally assumed that RSA responses are adaptive and optimise nutrient uptake in a given environment, but hard evidence for this paradigm is still sparse. Here we summarize recent advances made in these areas of research.
    Language English
    Publishing date 2017-10
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1418472-2
    ISSN 1879-0356 ; 1369-5266
    ISSN (online) 1879-0356
    ISSN 1369-5266
    DOI 10.1016/j.pbi.2017.06.008
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