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      Preparation of plants for developmental and cellular imaging by light-sheet microscopy

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          Abstract

          Long-term fluorescence live-cell imaging experiments have long been limited by the effects of excitation-induced phototoxicity. The advent of light-sheet microscopy now allows users to overcome this limitation by restricting excitation to a narrow illumination plane. In addition, light-sheet imaging allows for high-speed image acquisition with uniform illumination of samples composed of multiple cell layers. The majority of studies conducted thus far have used custom-built platforms with specialized hardware and software, along with specific sample handling approaches. The first versatile commercially available light-sheet microscope, Lightsheet Z.1, offers a number of innovative solutions, but it requires specific strategies for sample handling during long-term imaging experiments. There are currently no standard procedures describing the preparation of plant specimens for imaging with the Lightsheet Z.1. Here we describe a detailed protocol to prepare plant specimens for light-sheet microscopy, in which Arabidopsis seeds or seedlings are placed in solid medium within glass capillaries or fluorinated ethylene propylene tubes. Preparation of plant material for imaging may be completed within one working day.

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          Most cited references31

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          Fiji: an open-source platform for biological-image analysis.

          Fiji is a distribution of the popular open-source software ImageJ focused on biological-image analysis. Fiji uses modern software engineering practices to combine powerful software libraries with a broad range of scripting languages to enable rapid prototyping of image-processing algorithms. Fiji facilitates the transformation of new algorithms into ImageJ plugins that can be shared with end users through an integrated update system. We propose Fiji as a platform for productive collaboration between computer science and biology research communities.
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            Lattice light-sheet microscopy: imaging molecules to embryos at high spatiotemporal resolution.

            Although fluorescence microscopy provides a crucial window into the physiology of living specimens, many biological processes are too fragile, are too small, or occur too rapidly to see clearly with existing tools. We crafted ultrathin light sheets from two-dimensional optical lattices that allowed us to image three-dimensional (3D) dynamics for hundreds of volumes, often at subsecond intervals, at the diffraction limit and beyond. We applied this to systems spanning four orders of magnitude in space and time, including the diffusion of single transcription factor molecules in stem cell spheroids, the dynamic instability of mitotic microtubules, the immunological synapse, neutrophil motility in a 3D matrix, and embryogenesis in Caenorhabditis elegans and Drosophila melanogaster. The results provide a visceral reminder of the beauty and the complexity of living systems. Copyright © 2014, American Association for the Advancement of Science.
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              Optical sectioning deep inside live embryos by selective plane illumination microscopy.

              Large, living biological specimens present challenges to existing optical imaging techniques because of their absorptive and scattering properties. We developed selective plane illumination microscopy (SPIM) to generate multidimensional images of samples up to a few millimeters in size. The system combines two-dimensional illumination with orthogonal camera-based detection to achieve high-resolution, optically sectioned imaging throughout the sample, with minimal photodamage and at speeds capable of capturing transient biological phenomena. We used SPIM to visualize all muscles in vivo in the transgenic Medaka line Arnie, which expresses green fluorescent protein in muscle tissue. We also demonstrate that SPIM can be applied to visualize the embryogenesis of the relatively opaque Drosophila melanogaster in vivo.
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                Author and article information

                Journal
                Nature Protocols
                Nat Protoc
                Springer Science and Business Media LLC
                1754-2189
                1750-2799
                August 2015
                July 23 2015
                August 2015
                : 10
                : 8
                : 1234-1247
                Article
                10.1038/nprot.2015.081
                26203821
                beedbdc1-d91f-4500-ac28-abaa3b68f553
                © 2015

                http://www.springer.com/tdm

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