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Image analysis of Moroccan carob seeds(Ceratonia siliqua L.)revealed substantial intraspecific variations depending on climate and geographic origin

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Ecological Processes 2022年第1期11卷 455-468页

作者： Jalal Kassout Younes Hmimsa Salama El Fatehi Abdeltif El Ouahrani Khalil Kadaoui Soufian Chakkour David Ariza‑Mateos Guillermo Palacios‑Rodríguez Rafael Navarro‑Cerrillo Mohammed Ater Laboratory of Applied Botany Bio‑Agrodiversity TeamFaculty of SciencesUniversity of Abdelmalek EssaadiTétouanMorocco Associated International Laboratory EVOLEA INEE‑CNRS‑CNRSTMontpellierFrance Polydisciplinary Faculty of Larache University of Abdelmalek EssaadiLaracheMorocco Forestry Engineering Department ERSAF Research Group RNM‑360University of CórdobaCórdobaSpain

Background:The carob tree(Ceratonia siliqua L.)is one of the most iconic tree species of the Mediterranean region,with valuable economic,ecological and cultural value.Carob has been exploited around the Mediterranean region since antiquity and has been regarded as an important component of natural habitats and traditional agroecosystems.Several studies have focused on its morphological,biochemical,and genetic diversity.However,less is known about the intraspecific variation of seed traits.In this regard,and as an overall objective,we intend to evaluate the amplitude and the expression of intraspecific variations of carob seed traits at different ecological scales ranging from individual trees to different geographical landscapes.In addition,we investigated how the climate along the study area affects the extent of carob seed variability.Using image analysis techniques,we measured seven traits related to the size and the shape of 1740 seeds collected from 18 populations of spontaneous C.siliqua distributed along a latitudinal transect in Morocco under different bioclimatic conditions.Results:The morphometric analysis of carob seed showed the effectiveness of adopted approach to highlight the amount and the amplitude of intraspecific variation according to geographic and climatic factors.Seed trait analysis revealed high intraspecific variability,explained by differences between and among carob populations and geographic zones.Seed area,perimeter,length,and width showed the largest variability between geographic zones.However,circularity,aspect ratio,and seed roundness showed higher variability at the tree level.Finally,our results show that seed traits vary depending on altitude and climate condition.Conclusions:Revealing the amount and the structure of intraspecific traits variability of carob seed provides interesting insights to understand the mechanisms underlying trees adaptation to various environmental and ecological conditions.Therefore,intraspecific variation of seed traits should be integrated into trait

关键词： Carob tree Image analysis Seed traits Intraspecific variation Morocco

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Chip-based multimodal super-resolution microscopy for histological investigations of cryopreserved tissue sections

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Light(Science & Applications) 2022年第3期11卷 35-51页

作者： Luis E.Villegas-Hernández Vishesh Dubey Mona Nystad Jean-Claude Tinguely david A.Coucheron Firehun T.Dullo Anish Priyadarshi Sebastian Acuña Azeem Ahmad JoséM.mateos Gery Barmettler Urs Ziegler Åsa Birna Birgisdottir Aud-Malin Karlsson Hovd Kristin Andreassen Fenton Ganesh Acharya Krishna Agarwal Balpreet Singh Ahluwalia Department of Physics and Technology UiT The Arctic University of NorwayKlokkargårdsbakken N-9019TromsøNorway Department of Clinical Medicine Women’s Health and Perinatology Research GroupUiT The Arctic University of NorwayTromsøNorway Department of Obstetrics and Gynecology University Hospital of North NorwayTromsøNorway Center for Microscopy and Image Analysis University of ZurichZürichSwitzerland Division of Cardiothoracic and Respiratory Medicine University Hospital of North NorwayTromsøNorway Department of Clinical Medicine Clinical Cardiovascular Research GroupUiT The Arctic University of NorwayTromsøNorway Department of Medical Biology RNA and Molecular Pathology Research GroupUiT The Arctic University of NorwayTromsøNorway Division of Obstetrics and Gynecology Department of Clinical ScienceIntervention and TechnologyKarolinska InstituteStockholmSweden

Histology involves the observation of structural features in tissues using a microscope.While diffraction-limited optical microscopes are commonly used in histological investigations,their resolving capabilities are insufficient to visualize details at subcellular level.Although a novel set of super-resolution optical microscopy techniques can fulfill the resolution demands in such cases,the system complexity,high operating cost,lack of multi-modality,and low-throughput imaging of these methods limit their wide adoption for histological analysis.In this study,we introduce the photonic chip as a feasible high-throughput microscopy platform for super-resolution imaging of histological samples.Using cryopreserved ultrathin tissue sections of human placenta,mouse kidney,pig heart,and zebrafish eye retina prepared by the Tokuyasu method,we demonstrate diverse imaging capabilities of the photonic chip including total internal reflection fluorescence microscopy,intensity fluctuation-based optical nanoscopy,single-molecule localization microscopy,and correlative light-electron microscopy.Our results validate the photonic chip as a feasible imaging platform for tissue sections and pave the way for the adoption of super-resolution high-throughput multimodal analysis of cryopreserved tissue samples both in research and clinical settings.

关键词： resolution modal feasible

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Conditions for Singularity of Twist Grain Boundaries between Arbitrary 2-D Lattices

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Crystal Structure Theory and Applications 2012年第3期1卷 52-56页

作者： david Romeu Jose L. Aragón Gerardo Aragón-González Marco A. Rodríguez-Andrade Alfredo Gómez Departamento de Matemáticas Escuela Superior de Física y Matemáticas Instituto Politécnico Nacional Unidad Profesional Adolfo López Mateos México City México Departamento de Materia Condensada Instituto de Física Universidad Nacional Autónoma de México México City México Departamento de Nanotecnología Centro de Física Aplicada y Tecnología Avanzada Universidad Nacional Autónoma de México México City México Programa de Desarrollo Profesional en Automatización Universidad Autónoma Metropolitana México City México

We have shown that the expression =2tan-1/ derived by Ranganathan to calculate the angles at which there exists a CSL for rotational interfaces in the cubic system can also be applied to general (oblique) two-dimensional lattices provided that the quantities 2 and /cos() are rational numbers, with =|b|/|a| and is the angle between the basis vectors a and b. In contrast with Ranganathan’s results, N;given by N=tan2() needs no longer be an integer. Specifically, vectors a and b must have the form a=(1,0);b=(r,tan) where r is an arbitrary rational number. We have also shown that the interfacial classification of cubic twist interfaces based on the recurrence properties of the O-lattice remains valid for arbitrary two-dimensional interfaces provided the above requirements on the lattice are met.

关键词： Grain Boundaries Crystallography of Interfaces Coincidence Site Lattice

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