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Author Guo W., Chen S., Xu Y., Cai X.
Title OsASR6 Alleviates Rice Resistance to <i>Xanthomonas oryzae</i> via Transcriptional Suppression of <i>OsCIPK15</i>.
Abstract:
The plant-specific ASR (abscisic acid, stress and ripening) transcription factors are pivotal regulators of plant responses to abiotic stresses. However, their functions in plant disease resistance remain largely unknown. In this study, we revealed the role of OsASR6 in rice plants' resistance to two important bacterial diseases caused by <i>Xanthomonas</i>&amp;nbsp;<i>oryzae</i> pv. <i>oryzae</i> (<i>Xoo</i>) and <i>X.</i>&amp;nbsp;<i>oryzae</i> pv. <i>oryzicola</i> (<i>Xoc</i>) and elucidated the mechanisms underlying OsASR6-regulated resistance. The expression of <i>OsASR6</i> was strongly elevated in response to both <i>Xoo</i> and <i>Xoc</i> challenges. Silencing of <i>OsASR6</i> in OsASR6-RNAi transgenic plants markedly enhanced rice resistance to the two bacterial pathogens. Moreover, comparative transcriptome analyses for OsASR6-RNAi and wild-type plants inoculated and uninoculated with <i>Xoc</i> demonstrated that <i>OsASR6</i> suppressed rice resistance to <i>Xoc</i> by comprehensively fine-tuning <i>CIPK15</i>- and <i>WRKY45-1</i>-mediated immunity, SA signaling and redox homeostasis. Further luciferase reporter assays confirmed that OsASR6 negatively regulated <i>CIPK15</i> but not <i>WRKY45-1</i> expression in planta. Overexpression of <i>OsCIPK15</i> strongly enhanced rice resistance to <i>Xoo</i> and <i>Xoc</i>. Collectively, these results reveal that OsASR6 alleviates rice resistance through the transcriptional suppression of <i>OsCIPK15</i>, and thus links calcium signaling to rice resistance against <i>X.</i>&amp;nbsp;<i>oryzae</i>. Our findings provide insight into the mechanisms underlying OsASR6-mediated regulation of rice resistance to <i>X.</i>&amp;nbsp;<i>oryzae</i>.
Journal Int J Mol Sci
Country China
Volume 23(12)
Pages
Year 2022
PubMed ID 35743079
PubMed Central ID 9223573
DOI 10.3390/ijms23126622
URL -
Relation
Gene ACS2 ASN1 ASR2 CIPK05 CIPK15 ERF51 GNP1 JIOSPR10 PIBH8 SABATH2 SABATH9 SARD1 SD1 WRKY45 WRKY76 _
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
-
Stages in Each Organ
- Muant Lines (Gene)
-
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase