Abstract
The plant cell wall responds dynamically during interaction with various pathogens. Upon recognition of “nonself” components, plant cells deploy a variety of immune responses including cell wall fortification. Callose, a β-(1, 3)-d-glucan polymer, is a component of the material deposited at the site of infection between the plasma membrane and the preexisting cell wall that is hypothesized to serve as a physical barrier and platform for directed antimicrobial compound deposition. The defense-associated function of callose deposition is supported by its induction during pathogen-associated molecular patterns (PAMP)-triggered immunity (PTI) and its inhibition by defense suppressing virulence effectors. Thus, callose deposition is a commonly monitored read-out in plant defense. This protocol describes the use of aniline blue staining and fluorescent microscopy to measure callose deposition in bacteria-infected or elicitor-challenged Arabidopsis leaf tissues.
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Acknowledgments
This protocol is adapted from Kim and Mackey, 2008, MiMB [22]. Funding for this work was provided by the US Department of Agriculture (National Institute of Food and Agriculture, grant #2015-11870612), the Korean Rural Development Administration Next-Generation BioGreen Program (System and Synthetic Agro-Biotech Center and grant nos. PJ009088 and PJ011091), and the Ohio Agricultural Research and Development Center of the Ohio State University.
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Jin, L., Mackey, D.M. (2017). Measuring Callose Deposition, an Indicator of Cell Wall Reinforcement, During Bacterial Infection in Arabidopsis. In: Shan, L., He, P. (eds) Plant Pattern Recognition Receptors. Methods in Molecular Biology, vol 1578. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-6859-6_16
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DOI: https://doi.org/10.1007/978-1-4939-6859-6_16
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