Filters








3,275 Hits in 11.2 sec

Space-time dynamics of Stem Cell Niches: a unified approach for Plants

Maria del Carmen Pérez, Alejandro López, Pablo Padilla
2013 Journal of Integrative Bioinformatics  
We propose a mathematical model based on cellular automata for describing the space-time dynamics of the stem cell niche in the root.  ...  This could be a first step in understanding why different stem cell niches share similar topologies, not only in plants.  ...  global architecture of the niche according to different physiological requirements. 3 The mathematical model: The unified approach Meristems control the development of the plant due to a balance between  ... 
doi:10.1515/jib-2013-219 fatcat:5mxwm4bwtfdirhd4rtgr4q4u6a

Space-time dynamics of Stem Cell Niches: a unified approach for Plants

Maria Del Carmen Perez, Alejandro Lopez, Pablo Padilla, Bielefeld University, Faculty Of Technology Applied Computer Science, Bielefeld University Library, Publikationsdienste.Ub@Uni-Bielefeld.De, BieColl
2013 Journal of Integrative Bioinformatics  
We propose a mathematical model based on cellular automata for describing the space-time dynamics of the stem cell niche in the root.  ...  This could be a first step in understanding why different stem cell niches share similar topologies, not only in plants.  ...  The mathematical model: The unified approach Meristems control the development of the plant due to a balance between cell proliferation and differentiation.  ... 
doi:10.2390/biecoll-jib-2013-219 pmid:23545213 dblp:journals/jib/PerezLP13 fatcat:ljkmbs7yqngnvo2o5i4gmyzmym

Transcriptional Control of a Plant Stem Cell Niche

Wolfgang Busch, Andrej Miotk, Federico D. Ariel, Zhong Zhao, Joachim Forner, Gabor Daum, Takuya Suzaki, Christoph Schuster, Sebastian J. Schultheiss, Andrea Leibfried, Silke Haubeiß, Nati Ha (+2 others)
2010 Developmental Cell  
Our results shed light on the complex transcriptional programs required for the maintenance of a dynamic and essential stem cell niche.  ...  Despite the independent evolution of multicellularity in plants and animals, the basic organization of their stem cell niches is remarkably similar.  ...  However, in contrast to animal systems, in which individual stem cell niches only supply a defined organ system during adult development, almost the entire above-ground tissue of a plant is derived from  ... 
doi:10.1016/j.devcel.2010.03.012 pmid:20493817 fatcat:kcriwi7gkvdl7p7evdjpueuh5e

Phytoplankton niches, traits and eco-evolutionary responses to global environmental change

E Litchman, KF Edwards, CA Klausmeier, MK Thomas
2012 Marine Ecology Progress Series  
KEY WORDS: Ecological niche · Climate change · Trait-based approach · Trade-off · Experimental evolution · Community · Adaptive dynamics Resale or republication not permitted without written consent of  ...  Using phytoplankton ecological niches to predict their responses to multiple environmental stressors is a promising new approach.  ...  Hutchins for inviting her to give a talk at the ASLO Ocean Sciences meeting 2010 that led to the development of the present paper.  ... 
doi:10.3354/meps09912 fatcat:ok7mguyzabfznoajhmtkizxvde

Competition and niche separation of pelagic bacteria in freshwater habitats

Jakob Pernthaler
2017 Environmental Microbiology  
a systems approach.  ...  rabbits from plots of land led to a 'very great diminution of the number of 3 individual plants […]' except for a single species 'which increased enormously'.  ...  . 11 Gould, S.J., and Lewontin, R.C. (1979) Spandrels of San-Marco and the Panglossian Paradigm -a 12 Critique of the Adaptationist Program.  ... 
doi:10.1111/1462-2920.13742 pmid:28370850 fatcat:rmjcxy2dmjeh5gjiojznsxy6sa

Disjunct populations of European vascular plant species keep the same climatic niches

Safaa Wasof, Jonathan Lenoir, Per Arild Aarrestad, Inger Greve Alsos, W. Scott Armbruster, Gunnar Austrheim, Vegar Bakkestuen, H. John B. Birks, Kari Anne Bråthen, Olivier Broennimann, Jörg Brunet, Hans Henrik Bruun (+36 others)
2015 Global Ecology and Biogeography  
140 Wasof et al. 667 Pearman, P.B., Guisan, A., Broennimann, O. & Randin, C.F. (2008) Niche dynamics in space 668 and time.  ...  is constant in space and time (thousands 553 of years) seems to be valid to a large extent.  ... 
doi:10.1111/geb.12375 fatcat:rjzxnjfpsbbxpg2chtutrytgd4

Asymmetric cell division in plants: mechanisms of symmetry breaking and cell fate determination

Lynn Jo Pillitteri, Xiaoyu Guo, Juan Dong
2016 Cellular and Molecular Life Sciences (CMLS)  
The importance of asymmetric cell division in determining final plant form provides the impetus for its study in the areas of both basic and applied science.  ...  Asymmetric cell division is a fundamental mechanism that generates cell diversity while maintaining self-renewing stem cell populations in multicellular organisms.  ...  . a Histone modification events in the root stem cell niche.  ... 
doi:10.1007/s00018-016-2290-2 pmid:27286799 pmcid:PMC5522748 fatcat:5kihagvu55envoaxvxnu76susy

Modelling the Adaptability of Biological Systems

Eugene Ch'ng
2007 Open Cybernetics and Systemics Journal  
However, if a unified formula could be found to measure all of the factors against the preferences of each life form, its potentials for modelling open systems that require multiple external input variables  ...  Experiments using the formula in the pilot study showed characteristics of emergent behaviours as each dynamic system seeks its own ecological niche.  ...  While modelling these behavioural rules requires careful observations, a deeper problem that is being neglected is the attempt to discover a unified approach for determining the collective fitness of an  ... 
doi:10.2174/1874110x070101130x fatcat:ez6gbci3jzdhfnvwtta5nqwcfy

Why are there so many small plants? Implications for species coexistence

LONNIE W. AARSSEN, BRANDON S. SCHAMP, JASON PITHER
2006 Journal of Ecology  
Moreover, most of the time it will be a small species that produces offspring in that space because much of the time, the size of the space and its associated resource supply will be inadequate for large  ...  A total of 9362 vascular plant stems were identified, with a total of 56 species represented, seven of which were fern species (1278 stems) (not included here).  ... 
doi:10.1111/j.1365-2745.2006.01128.x fatcat:3utztorkhvdcjadp5gpfftddjm

Extended criticality, phase spaces and enablement in biology

Giuseppe Longo, Maël Montévil
2013 Chaos, Solitons & Fractals  
This paper analyzes, in terms of critical transitions, the phase spaces of biological dynamics.  ...  The phase space is the space where the scientific description and determination of a phenomenon is given.  ...  Acknowledgments We would like to thank Stuart Kauffman for the very stimulating joint work that preceded this paper and the editors for their interest in "extended criticality".  ... 
doi:10.1016/j.chaos.2013.03.008 fatcat:ancg5l46mravbdq2vj3ypgheru

A conceptual framework for the evolution of ecological specialisation

Timothée Poisot, James D. Bever, Adnane Nemri, Peter H. Thrall, Michael E. Hochberg
2011 Ecology Letters  
Yet its status as a unifying concept is not always appreciated because of its similarity to concepts of the niche, the many levels of biological phenomena to which it applies, and the complexity of the  ...  Here, we develop a view on specialisation that integrates across the range of biological phenomena with the goal of developing a more predictive conceptual framework that specifically accounts for the  ...  Devictor for discussions on the semantics of specialisation and three referees for their insightful comments. We are grateful to the curators and contributors of the IWDB database.  ... 
doi:10.1111/j.1461-0248.2011.01645.x pmid:21699641 pmcid:PMC3152695 fatcat:3rpxrwtbifcern3c2zhhztcp7i

Agency, teleonomy and signal transduction in plant systems

Simon Gilroy, Tony Trewavas
2022 Biological Journal of the Linnean Society  
Through recurrent information exchange, growing roots construct a dynamic niche with bacterial and fungal symbionts.  ...  Convergent evolution is common and may result from the constraints of unchanging physical laws. Phenotypic plasticity initially provides a direction for evolutionary change.  ...  Throughout evolutionary time, the pattern of much plant change has been to improve the competitive facility for acquisition of these physical resources and space (Niklas, 1992) .  ... 
doi:10.1093/biolinnean/blac021 fatcat:67txkhyfxnawrpmos2marlns44

Quantification of cell identity from single-cell gene expression profiles

Idan Efroni, Pui-Leng Ip, Tal Nawy, Alison Mello, Kenneth D Birnbaum
2015 Genome Biology  
The definition of cell identity is a central problem in biology.  ...  Our technique exposes a previously uncharacterized transient collapse of identity distant from the injury site, demonstrating the biological relevance of a quantitative cell identity index.  ...  Acknowledgments We thank Dan Tranchina for helpful discussion and members of the Birnbaum lab for comments.  ... 
doi:10.1186/s13059-015-0580-x pmid:25608970 pmcid:PMC4354993 fatcat:g3euda3dgzg3hgg446sqrs6uie

Recapitulating the Tumor Ecosystem Along the Metastatic Cascade Using 3D Culture Models

Jiyun Kim, Kandice Tanner
2015 Frontiers in Oncology  
This research was also supported by a grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic  ...  Staunton and George Leiman for critically reading this manuscript.  ...  Recently a review proposed consider an alternative approach from evolutionary dynamics, where an allee effect may be explored for therapeutics.  ... 
doi:10.3389/fonc.2015.00170 pmid:26284194 pmcid:PMC4518327 fatcat:ht3fork4tzbvheydfzsuholifq

Causality of the Relationship between Geographic Distribution and Species Abundance

Michael Krabbe Borregaard, Carsten Rahbek
2010 The Quarterly review of biology  
In this review, we suggest that much of the disparity between these hypotheses stems from differences in terminology and ecological point of view.  ...  Here, we review all the mechanisms that have been proposed to account for distribution-abundance relationships, in a framework that facilitates a comparison between them.  ...  For instance, metapopulation dynamics are expected to occur at very different time scales for a population of fruit flies than for forest trees.  ... 
doi:10.1086/650265 pmid:20337258 fatcat:6szpcafjffdhrbe4min4jxy37a
« Previous Showing results 1 — 15 out of 3,275 results