Journal of Plant Biology

, Volume 55, Issue 1, pp 43–49 | Cite as

Establishment of Glucocorticoid-Mediated Transcriptional Induction of the Rice XA21 Pattern Recognition Receptor

  • Chang-Jin Park
  • Patrick E. Canlas
  • Pamela C. RonaldEmail author
Original Research


The rice pattern recognition receptor, XA21, confers robust resistance to the bacterial pathogen Xanthomonas oryzae pv. oryzae (Xoo). We have generated transgenic plants that express Xa21 only in the presence of the glucocorticoid hormone, dexamethasone (DEX). DEX-mediated transcriptional induction of Xa21 is accompanied by upregulation of pathogenesis-related 1 gene expression and restriction of Xoo multiplication. The DEX-inducible system can be used to synchronize the XA21-mediated response to infection throughout the entire leaf, facilitating the study of innate immunity.


Dexamethasone Glucocorticoid Oryza sativa Pattern recognition receptor XA21 





GAL4-binding domain–VP16 activation domain–GR fusion


Pattern recognition receptor




Xanthomonas oryzae pv. oryzae



We thank Dr. Sang-Wook Han and Dr. Ofir Bahar for critical reading of the manuscript, Dr. Mawsheng Chen for the Gateway-compatible pTA7002 vector, and Randy Ruan for lab and greenhouse management. We also thank Seo Jung Yang and Timothy Tong for the technical assistance. This work was supported by the National Institute of Health (NIH, GM55962) and the National Science Foundation (NSF, IOS-0817738).

Conflict of Interest

The authors declare no competing financial interests.


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Copyright information

© The Botanical Society of Korea 2011

Authors and Affiliations

  • Chang-Jin Park
    • 1
  • Patrick E. Canlas
    • 1
  • Pamela C. Ronald
    • 1
    Email author
  1. 1.Department of Plant Pathology, College of Agricultural and Environmental SciencesUniversity of California, DavisDavisUSA

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