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  1. Article ; Online: Debunking the idea of biological optimisation: quantitative biology to the rescue.

    Hamant, Olivier

    Quantitative plant biology

    2024  Volume 5, Page(s) e3

    Abstract: The idea that plants would be efficient, frugal or optimised echoes the recurrent semantics of 'blueprint' and 'program' in molecular genetics. However, when analysing plants with quantitative approaches and systems thinking, we instead find that plants ... ...

    Abstract The idea that plants would be efficient, frugal or optimised echoes the recurrent semantics of 'blueprint' and 'program' in molecular genetics. However, when analysing plants with quantitative approaches and systems thinking, we instead find that plants are the results of stochastic processes with many inefficiencies, incoherence or delays fuelling their robustness. If one had to highlight the main value of quantitative biology, this could be it: plants are robust systems because they are not efficient. Such systemic insights extend to the way we conduct plant research and opens plant science publication to a much broader framework.
    Language English
    Publishing date 2024-04-03
    Publishing country England
    Document type Editorial
    ISSN 2632-8828
    ISSN (online) 2632-8828
    DOI 10.1017/qpb.2024.3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The 1972 Meadows report: A wake-up call for plant science.

    Hamant, Olivier

    Quantitative plant biology

    2023  Volume 4, Page(s) e3

    Abstract: The 1972 Meadows report, 'the limits to growth', predicted a global socio-economic tipping point during the twenty-first century. Now supported by 50 years of empirical evidence, this work is a tribute to systems thinking and an invitation to take the ... ...

    Abstract The 1972 Meadows report, 'the limits to growth', predicted a global socio-economic tipping point during the twenty-first century. Now supported by 50 years of empirical evidence, this work is a tribute to systems thinking and an invitation to take the current environmental crisis for what it is: neither a transition nor a bifurcation, but an inversion. For instance, we used matter (e.g., fossil fuel) to save time; we will use time to preserve matter (e.g., bioeconomy). We were exploiting ecosystems to fuel production; production will feed ecosystems. We centralised to optimise; we will decentralise to support resilience. In plant science, this new context calls for new research on plant complexity (e.g., multiscale robustness and benefits of variability), also extending to new scientific approaches (e.g., participatory research, art and science). Taking this turn reverses many paradigms and becomes a new responsibility for plant scientists as the world becomes increasingly turbulent.
    Language English
    Publishing date 2023-03-06
    Publishing country England
    Document type Journal Article
    ISSN 2632-8828
    ISSN (online) 2632-8828
    DOI 10.1017/qpb.2023.2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Shoot meristem progenitors emerge from mechanical heterogeneities.

    Hamant, Olivier

    Developmental cell

    2022  Volume 57, Issue 17, Page(s) 2043–2044

    Abstract: In this issue of Developmental Cell, Varapparambath et al. identify a new module that is instrumental for the selection of meristem progenitor cells in undifferentiated tissues. This module is triggered by mechanical feedback, and it integrates ... ...

    Abstract In this issue of Developmental Cell, Varapparambath et al. identify a new module that is instrumental for the selection of meristem progenitor cells in undifferentiated tissues. This module is triggered by mechanical feedback, and it integrates extracellular matrix modification, polar hormone transport, and transcription factors.
    MeSH term(s) Meristem ; Plant Shoots ; Stem Cells ; Transcription Factors
    Chemical Substances Transcription Factors
    Language English
    Publishing date 2022-09-07
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 2054967-2
    ISSN 1878-1551 ; 1534-5807
    ISSN (online) 1878-1551
    ISSN 1534-5807
    DOI 10.1016/j.devcel.2022.08.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 5742: Show issues Location:
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    Zs.MG 76: Show issues

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  4. Article ; Online: Plant scientists can't ignore Jevons paradox anymore.

    Hamant, Olivier

    Nature plants

    2020  Volume 6, Issue 7, Page(s) 720–722

    MeSH term(s) Arecaceae/growth & development ; Biotechnology ; Conservation of Natural Resources ; Crop Production/methods ; Palm Oil ; Plants, Genetically Modified/growth & development
    Chemical Substances Palm Oil (5QUO05548Z)
    Language English
    Publishing date 2020-07-07
    Publishing country England
    Document type Journal Article
    ISSN 2055-0278
    ISSN (online) 2055-0278
    DOI 10.1038/s41477-020-0722-3
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  5. Article ; Online: Plants Show Us the Light.

    Hamant, Olivier

    Trends in plant science

    2020  Volume 26, Issue 2, Page(s) 97–99

    Abstract: In a recent article, Arp et al. (Science 2020, 368, 1490-1495) propose a new theory as to why plants are green: plants prioritize the management of light fluctuations over maximal efficiency. Beyond plant science, this conclusion may inspire our ... ...

    Abstract In a recent article, Arp et al. (Science 2020, 368, 1490-1495) propose a new theory as to why plants are green: plants prioritize the management of light fluctuations over maximal efficiency. Beyond plant science, this conclusion may inspire our sustainability strategies, to shift our societal goals from performance to resilience.
    MeSH term(s) Light ; Photosynthesis ; Plants
    Language English
    Publishing date 2020-11-18
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1305448-x
    ISSN 1878-4372 ; 1360-1385
    ISSN (online) 1878-4372
    ISSN 1360-1385
    DOI 10.1016/j.tplants.2020.10.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 2005/719: Show issues

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  6. Article ; Online: Editorial.

    Hamant, Olivier

    Quantitative plant biology

    2020  Volume 1, Page(s) e1

    Abstract: Like many scientific communities, plant science has moved to a new era with the rise of quantitative approaches. This is not merely about high-resolution quantification methods or the generation of massive datasets through omics; the quantitative ... ...

    Abstract Like many scientific communities, plant science has moved to a new era with the rise of quantitative approaches. This is not merely about high-resolution quantification methods or the generation of massive datasets through omics; the quantitative revolution is much deeper because it unfolds the rich complexity behind plant life.
    Language English
    Publishing date 2020-08-14
    Publishing country England
    Document type Journal Article ; Review
    ISSN 2632-8828
    ISSN (online) 2632-8828
    DOI 10.1017/qpb.2020.2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Why is FERONIA pleiotropic?

    Malivert, Alice / Hamant, Olivier

    Nature plants

    2023  Volume 9, Issue 7, Page(s) 1018–1025

    Abstract: The plant cell wall has many roles: structure, hydraulics, signalling and immunity. Monitoring its status is therefore essential for plant life. Among many candidate cell wall sensors, FERONIA, a member of the Catharanthus roseus receptor-like kinase-1- ... ...

    Abstract The plant cell wall has many roles: structure, hydraulics, signalling and immunity. Monitoring its status is therefore essential for plant life. Among many candidate cell wall sensors, FERONIA, a member of the Catharanthus roseus receptor-like kinase-1-like kinase (CrRLK1L) family, has received considerable attention, notably because of its numerous interactors and its implication in many biological pathways. Conversely, such an analytical dissection may blur its core function. Here we revisit the array of feronia phenotypes as an attempt to identify a unifying feature behind the plethora of biological and biochemical functions. We propose that the contribution of FERONIA in monitoring turgor-dependent cell wall tension may explain its pleiotropy.
    MeSH term(s) Cell Wall/metabolism ; Cell Membrane
    Language English
    Publishing date 2023-06-19
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ISSN 2055-0278
    ISSN (online) 2055-0278
    DOI 10.1038/s41477-023-01434-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Discretizing the cellular bases of plant morphogenesis: Emerging properties from subcellular and noisy patterning.

    Kirchhelle, Charlotte / Hamant, Olivier

    Current opinion in cell biology

    2023  Volume 81, Page(s) 102159

    Abstract: A fundamental question in biology is how multicellular organisms robustly shape their organs. In the past decade, much progress has been made not just in identifying biochemical and biophysical factors underpinning morphogenesis, but also in analyzing ... ...

    Abstract A fundamental question in biology is how multicellular organisms robustly shape their organs. In the past decade, much progress has been made not just in identifying biochemical and biophysical factors underpinning morphogenesis, but also in analyzing their spatio-temporal dynamics. A remarkable outcome of such analyses is that morphogenesis involves high levels of heterogeneity and fluctuations at local scales. Although this could be considered as white noise to be averaged over time, there is increasing evidence that these heterogeneities and fluctuations are instructive cues for development. In this review, we highlight some of the new questions that such heterogeneities raise for plant morphogenesis. We also investigate their effects across scales, focusing on how subcellular heterogeneities contribute to organ shape robustness and evolvability.
    MeSH term(s) Morphogenesis ; Plant Development
    Language English
    Publishing date 2023-03-24
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1026381-0
    ISSN 1879-0410 ; 0955-0674
    ISSN (online) 1879-0410
    ISSN 0955-0674
    DOI 10.1016/j.ceb.2023.102159
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2963: Show issues Location:
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  9. Article ; Online: Contributions of lignification, tissue arrangement patterns, and cross-sectional area to whole-stem mechanical properties in Arabidopsis thaliana.

    Asaoka, Mariko / Badel, Eric / Ferjani, Ali / Nishitani, Kazuhiko / Hamant, Olivier

    Journal of plant research

    2024  

    Abstract: Plant cells withstand mechanical stress originating from turgor pressure by robustly maintaining the mechanical properties of the cell wall. This applies at the organ scale as well; many plant stems act as pressurized cylinders, where the epidermis is ... ...

    Abstract Plant cells withstand mechanical stress originating from turgor pressure by robustly maintaining the mechanical properties of the cell wall. This applies at the organ scale as well; many plant stems act as pressurized cylinders, where the epidermis is under tension and inner tissues are under compression. The clavata3 de-etiolated3 (clv3-8 det3-1) double mutant of Arabidopsis thaliana displays cracks in its stems because of a conflict between the mechanical properties of the weak epidermis and over-proliferation of inner stem tissues. In this work, we conducted three-point bending tests on various Arabidopsis thaliana mutants, including those displaying the stem cracking phenotype, to examine the differences in their mechanical properties. The clv3-8 det3-1 double mutant exhibited reduced stem stiffness, consistent with reduced differentiation due to the clv3-8 mutation. Yet, in clv3-8, stem cross-sectional area was increased associating with the increase in vascular bundle number, and stem cross-sections displayed various shapes. To uncouple the contribution of geometry and cell-wall differentiation to the mechanical properties of the whole stems, we tested the contribution of lignified fibers to stem stiffness. In order to suppress lignin deposition in stems genetically, we generated multiple higher-order mutants by crossing clv3-8 and/or det3-1 with nst1-1 nst3-1, in which lignin deposition is suppressed. Stem stiffness was reduced markedly in all nst1-1 nst3-1 mutant backgrounds. Overall, our results suggest that stem stiffness relies on the presence of differentiated, lignified, fiber tissue as well as on the alignment or spatial distribution of vascular bundles within the stem organ.
    Language English
    Publishing date 2024-04-26
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2077362-6
    ISSN 1618-0860 ; 0918-9440
    ISSN (online) 1618-0860
    ISSN 0918-9440
    DOI 10.1007/s10265-024-01543-2
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  10. Article ; Online: Mechano-devo.

    Hamant, Olivier

    Mechanisms of development

    2017  Volume 145, Page(s) 2–9

    Abstract: In "On growth and form", D'Arcy Wentworth Thompson (1917) stresses the inevitable interactions between physics and developmental biology. With the recent progress in molecular genetics, live imaging, micromechanics and modeling, the study of ... ...

    Abstract In "On growth and form", D'Arcy Wentworth Thompson (1917) stresses the inevitable interactions between physics and developmental biology. With the recent progress in molecular genetics, live imaging, micromechanics and modeling, the study of morphogenesis has been rejuvenated in the present century: the activity of developmental genes can be interpreted in terms of mechanical properties to dissect the chain of events behind shape changes; in turn, patterns of shape- and growth-derived mechanical stress are calculated and shown to act as signals controlling cell effectors, in synergy with biochemical cues, thereby channeling morphogenesis. In short, the relation between the mechanics and the biochemistry of shape changes is now addressed more comprehensively. Beyond the legacy left by this unique, elegant, and thought provoking analysis of development, D'Arcy rooted a new field, that one could call "mechano-devo", and used didactic analogies to bridge biology and physics. Here are some subjective take home messages from this seminal book, for the developmental biologist interested in conducting such interdisciplinary research.
    MeSH term(s) Animals ; Developmental Biology/methods ; Humans ; Models, Biological ; Molecular Biology ; Morphogenesis/genetics ; Morphogenesis/physiology ; Stress, Mechanical
    Language English
    Publishing date 2017
    Publishing country Ireland
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 1055986-3
    ISSN 1872-6356 ; 0925-4773
    ISSN (online) 1872-6356
    ISSN 0925-4773
    DOI 10.1016/j.mod.2017.02.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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