Abstract
Histopathological analyses of red crown rot (RCR) of soybean were performed using field-grown and indoor-grown soybean plants. These analyses revealed that soybean plants formed a periderm to prevent pathogen invasion. When a break formed in the periderm, an additional periderm newly differentiated into the inner cells and prevented pathogen invasion. If the pathogen reached the intravascular tissues, some xylem parenchyma cells died, and the vessels were occluded by gum. Periderm formation and vessel occlusion were observed not only in slightly diseased soybean plants, but also in seriously diseased plants, indicating that both reactions function as part of the defense response against RCR.
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Acknowledgements
The authors thank Takuji Nakamura, Norikazu Nakayama, Satoshi Shimamura, and Susumu Hiraga for helpful discussion. This work was supported by a “Development of Innovative Crops Through the Molecular Analysis of Useful Genes” project grant from the National Agriculture and Food Research Organization, and by a grant from the Ministry of Agriculture, Forestry, and Fisheries of Japan (Development of Diagnostic Methods and Countermeasure Techniques for Overcoming High-Yield Inhibitory Factors).
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Yamamoto, R., Nakagawa, A., Shimada, S. et al. Histopathology of red crown rot of soybean. J Gen Plant Pathol 83, 23–32 (2017). https://doi.org/10.1007/s10327-016-0694-3
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DOI: https://doi.org/10.1007/s10327-016-0694-3