Histochemical Assay
Histochemical Assay - Related Videos
10:39
Histochemical Staining of Arabidopsis thaliana Secondary Cell Wall Elements
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Cited by 250 •
2014
Plant cell wall composition varies between tissue types and can include lignin, cellulose, hemicelluloses, and pectin. Various staining techniques have been developed to visualize differences at the cell-type level. This paper is a compilation of commonly used cell wall staining techniques.
03:34
Histochemical Imaging of Cortical Modules in Flattened Brain Sections
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2025
Source: Lauer, S. M., et al. Visualization of Cortical Modules in Flattened Mammalian Cortices. J. Vis. Exp. (2018) This video demonstrates a method to visualize the cortical modules in flattened brain sections using histochemical staining. Pre-fixed sections are treated with a straining reagent that highlights active neural clusters, forming dark, high-contrast regions. After mounting and dehydration, cortical modules appear under a bright-field microscope as dark, patchy patterns.
08:40
Quantitation of Protein Expression and Co-localization Using Multiplexed Immuno-histochemical Staining and Multispectral Imaging
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Cited by 17 •
2016
Immunohistochemistry is a powerful lab technique for evaluating protein localization and expression within tissues. Current semi-automated methods for quantitation introduce subjectivity and often create irreproducible results. Herein, we describe methods for multiplexed immunohistochemistry and objective quantitation of protein expression and co-localization using multispectral imaging.
07:25
Combining Histochemical Staining and Image Analysis to Quantify Starch in the Ovary Primordia of Sweet Cherry during Winter Dormancy
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Cited by 9 •
2019
We present a methodology to quantify the starch content in the ovary primordia in sweet cherry (Prunus avium L.) during winter dormancy by using an image analysis system combined with histochemical techniques.
07:35
A β-glucuronidase (GUS) Based Cell Death Assay
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Cited by 5 •
2011
Programmed cell death assays commonly used in mammalian systems such as DNA laddering or TUNEL assays, are often difficult to reproduce in plants. In combination with a GUS reporter system, we propose a rapid, plant based transient assay to analyze the potential death properties of specific genes.
FAQs
The assay’s selectivity depends on matching a target with an appropriate chemical reaction and substrate. When the target-associated reaction converts that substrate, the resulting colored or otherwise detectable product remains associated with the relevant tissue location. This creates a spatial signal that can indicate where a molecule is present or where an enzyme or cellular activity is occurring.
Preserving intact tissue allows the signal to be interpreted against recognizable anatomical structures rather than as an averaged measurement from a mixed sample. In a developing embryo or organ, researchers can therefore relate molecular or enzymatic activity to particular regions, cells, or tissue arrangements. That spatial relationship is essential for studying differentiation, tissue organization, and morphogenesis.
A histochemical assay can distinguish molecular presence from activity depending on what the reaction is designed to detect. A reaction directed at a molecule indicates its location, whereas a substrate-conversion reaction can mark where an enzyme or cellular process is active. This distinction helps developmental biologists avoid treating abundance and functional activity as identical observations.
Design begins by identifying the molecule, enzyme, or cellular activity of interest and selecting a selective substrate-reaction pair that can mark it in tissue. The expected product must generate a detectable signal, such as a color change, at the relevant location. These choices determine whether the assay reports distribution, activity, or both.
In developmental studies, the method is useful when the key question concerns where a developmental event occurs, not only whether it occurs. Spatial patterns can be examined across embryos or developing organs to follow gene-expression patterns, differentiation, tissue organization, and morphogenesis. The resulting anatomical map connects molecular activity with the structures emerging during development.
Comparing normal and perturbed specimens can reveal how an altered developmental condition changes the location or extent of a detected signal. Researchers may use these differences to associate molecular activity with changes in tissue formation or organization. Interpretation remains grounded in spatial pattern: a shifted, expanded, reduced, or differently arranged signal may correspond to a changed developmental process.