National Institute of Agricultural Sciences, Rural Development Administration, Jeonju 54874, Korea.
Department of Horticulture, Michigan State University, East Lansing, MI 48824, USA.
Int J Mol Sci. 2022 Aug 8;23(15):8825. doi: 10.3390/ijms23158825.
The phytohormone abscisic acid (ABA) regulates various aspects of plant growth, development, and stress responses. ABA suppresses innate immunity to pv. () in rice (), but the identity of the underlying regulator is unknown. In this study, we revealed that OsWRKY114 is involved in the ABA response during infection. ABA-induced susceptibility to was reduced in -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 -overexpressing plants than in the wild-type plants after inoculation. Taken together, our results suggest that OsWRKY114 is a negative regulator of ABA that confers susceptibility to in rice.
植物激素脱落酸（ABA）调节植物生长、发育和应激反应的各个方面。ABA抑制了水稻对 pv. () 的先天免疫，（），但潜在的调节因子尚不清楚。在这项研究中，我们揭示了 OsWRKY114 参与了 感染过程中的 ABA 反应。在过表达 OsWRKY114 的水稻植株中，ABA 诱导的对 的易感性降低。OsWRKY114 减弱了 ABA 对水杨酸依赖免疫的负效应。此外，OsWRKY114 降低了参与 ABA 反应和生物合成的 ABA 相关基因的转录水平。此外，在接种后，过表达植株中的内源 ABA 水平低于野生型植株。综上所述，我们的结果表明，OsWRKY114 是 ABA 的负调节剂，使水稻对 pv. () 敏感。
