Plant Biotechnology Reports

, Volume 13, Issue 6, pp 645–651 | Cite as

OsbZIP75 positively regulates plant defense against the bacterial leaf blight pathogen Xanthomonas oryzae pv. oryzae

  • Jong Hee Im
  • Sang Gu Lee
  • Eunhye Lee
  • Sang Ryeol Park
  • Ilpyung Ahn
  • Duk-Ju HwangEmail author
Original Article


Basic leucine zipper (bZIP) proteins are involved in various biological processes, including biotic and abiotic stress responses. In response to biotic stress in rice (Oryza sativa L.), the roles of the TGA class of OsbZIP proteins are well-characterized, whereas those of the non-TGA class of OsbZIP proteins remain largely unknown. Here, we analyze the function of OsbZIP75/RF2a in defense against Xanthomonas oryzae pv. oryzae (Xoo). The expression of OsbZIP75/RF2a was increased in response to infection with an incompatible Xoo race at 6 h post-inoculation, and rice plants overexpressing OsbZIP75/RF2a showed reduced symptom than wild-type plants upon infection with a compatible Xoo race. Defense related genes, especially OsPR10a, were up-regulated in OsbZIP75OX plants, and OsbZIP75/RF2a activated the OsPR10a promoter in a transient expression assay. Overall, these results indicate that OsbZIP75/RF2a acts as a positive regulator of defense against Xoo.


OsbZIP75 RF2a Xanthomonas oryzae pv. oryzae 



This work was supported by two grants (#PJ01326901 and #PJ01246301) from the National Institute of Agricultural Science, Rural Development Administration to Duk-Ju Hwang.


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Copyright information

© Korean Society for Plant Biotechnology 2019

Authors and Affiliations

  • Jong Hee Im
    • 1
  • Sang Gu Lee
    • 1
  • Eunhye Lee
    • 1
  • Sang Ryeol Park
    • 1
  • Ilpyung Ahn
    • 1
  • Duk-Ju Hwang
    • 1
    Email author
  1. 1.National Institute of Agricultural Science, Rural Development AdministrationJeonjuKorea

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