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    Emergent Protective Organogenesis in Date Palms: A Morpho-devo-dynamic Adaptive Strategy During Early Development.

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    TPC_201900008R2.PDF
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    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Xiao, Tingting
    Raygoza, Alejandro Aragón
    Pérez, Juan Caballero
    Kirschner, Gwendolyn Kristin
    Deng, Yanming
    Atkinson, Brian
    Sturrock, Craig
    Lube, Vinicius
    Wang, Jian You
    Lubineau, Gilles cc
    Al-Babili, Salim cc
    Ramírez, Luis Alfredo Cruz
    Bennett, Malcolm J
    Blilou, Ikram cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Bioscience Program
    Composite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
    Desert Agriculture Initiative
    King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering Division, COHMAS Laboratory, Thuwal 23955-6900, Saudi Arabia
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Plant Science
    Date
    2019-05-29
    Permanent link to this record
    http://hdl.handle.net/10754/656360
    
    Metadata
    Show full item record
    Abstract
    Desert plants have developed mechanisms for adapting to hostile desert conditions, yet these mechanisms remain poorly understood. Here, we describe two unique modes used by desert date palms (Phoenix dactylifera L.) to protect their meristematic tissues during early organogenesis. We used X-ray micro-computed tomography combined with high-resolution tissue imaging to reveal that, after germination, development of the embryo pauses while it remains inside a dividing and growing cotyledonary petiole. Transcriptomic and hormone analyses show that this developmental arrest is associated with the low expression of development-related genes and accumulation of hormones that promote dormancy and confer resistance to stress. Furthermore, organ-specific cell type mapping demonstrates that organogenesis occurs inside the cotyledonary petiole, with identifiable root and shoot meristems and their respective stem cells. The plant body emerges from the surrounding tissues with developed leaves and a complex root system that maximizes efficient nutrient and water uptake. We further show that, similar to its role in Arabidopsis thaliana, the SHORT-ROOT (SHR) homologue from date palms functions in maintaining stem cell activity and promoting formative divisions in the root ground tissue. Our findings provide insight into developmental programs that confer adaptive advantages in desert plants that thrive in hostile habitats.
    Citation
    Xiao, T., Raygoza, A. A., Pérez, J. C., Kirschner, G., Deng, Y., Atkinson, B., … Blilou, I. (2019). Emergent Protective Organogenesis in Date Palms: A Morpho-devo-dynamic Adaptive Strategy During Early Development. The Plant Cell, tpc.00008.2019. doi:10.1105/tpc.19.00008
    Sponsors
    The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). We acknowledge awards from the Biotechnology and Biological Sciences Research Council [grant numbers BB/PO16855/1, BB/M001806/1]; European Research Council FUTUREROOTS Advanced Investigator grant 294729; and Leverhulme Trust grant RPG-2016-409” We thank the manager of Publication Services and Researcher Support (KAUST), Dr. Virginia A. Unkefer and Dr Michael Cusack, for editing and critical reading of the manuscript. We are also grateful for the support from the KAUST Core Labs, especially the staff in the Imaging and Characterization Core Lab (https://corelabs.kaust.edu.sa/imaging). The authors thank Prof. Renze Heidstra for his critical reading of the manuscript.
    Publisher
    American Society of Plant Biologists (ASPB)
    Journal
    The Plant cell
    DOI
    10.1105/tpc.19.00008
    Additional Links
    http://www.plantcell.org/lookup/doi/10.1105/tpc.19.00008
    ae974a485f413a2113503eed53cd6c53
    10.1105/tpc.19.00008
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Bioscience Program; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Desert Agriculture Initiative

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