Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 15, Pages -Publisher
MDPI
DOI: 10.3390/ijms23158825
Keywords
abscisic acid; bacterial blight; innate immunity; OsWRKY114; rice; Xanthomonas oryzae pv; oryzae
Funding
- Research Program for Agricultural Science and Technology Development of the National Institute of Agricultural Sciences, Rural Development Administration, Republic of Korea [PJ01570601]
- 2022 Fellowship Program of the National Institute of Agricultural Sciences, Rural Development Administration, Republic of Korea [PJ01570601, PJ01661001]
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The phytohormone abscisic acid (ABA) regulates the immune response of rice to Xanthomonas oryzae pv. oryzae (Xoo). This study identified OsWRKY114 as a negative regulator of ABA, reducing the susceptibility of rice to Xoo infection and affecting the expression of ABA-associated genes.
The phytohormone abscisic acid (ABA) regulates various aspects of plant growth, development, and stress responses. ABA suppresses innate immunity to Xanthomonas oryzae pv. oryzae (Xoo) in rice (Oryza sativa), but the identity of the underlying regulator is unknown. In this study, we revealed that OsWRKY114 is involved in the ABA response during Xoo infection. ABA-induced susceptibility to Xoo was reduced in OsWRKY114-overexpressing rice plants. OsWRKY114 attenuated the negative effect of ABA on salicylic acid-dependent immunity. Furthermore, OsWRKY114 decreased the transcript levels of ABA-associated genes involved in ABA response and biosynthesis. Moreover, the endogenous ABA level was lower in OsWRKY114-overexpressing plants than in the wild-type plants after Xoo inoculation. Taken together, our results suggest that OsWRKY114 is a negative regulator of ABA that confers susceptibility to Xoo in rice.
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