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- W4280491003 abstract "Abstract N -acyl-homoserine lactones (AHLs) are used as quorum-sensing signals by gram-negative bacteria. It has been demonstrated that AHLs could exert impact on plant growth and disease resistance. N -decanoyl-homoserine lactone (C10-HSL) as one type of AHLs was reported to inhibit primary root growth in Arabidopsis. However, the mechanisms underlying C10-HSL-mediated alteration of root architecture remained largely unclear. Here, we investigated the signaling components and their interplay involved in C10-HSL-mediated inhibition of primary root growth in Arabidopsis using pharmacological, physiological and genetic approaches. C10-HSL treatment triggered a transient and immediate elevation in concentration of cytosolic free Ca 2+ and induced reactive oxygen species (ROS) accumulation, Mitogen-Activated Protein Kinase 6 (MPK6) activation, nitric oxide (NO) production in Arabidopsis roots. Ca 2+ channel inhibitors significantly alleviated the inhibitory effect of C10-HSL on primary root growth and reduced the ROS and NO generation induced by C10-HSL. Inhibition or scavenging of ROS and NO production neutralized the inhibitory effect of C10-HSL on primary root growth. Respiratory burst oxidase homolog mutants and a NO synthase mutant were less sensitive to C10-HSL with respect to primary root growth. Activation of MPKs especially MPK6 were required for C10-HSL inhibiting primary root growth and mpk6 showed a reduced sensitivity to C10-HSL with respect to primary root growth, suggesting a main role for MPK6 in this process. MPK6 was shown to act downstream of ROS and upstream of NO. Our data suggested that Ca 2+ , ROS, MPK6 and NO are all involved and might play roles in cascade in the C10-HSL-inhibited primary root growth in Arabidopsis." @default.
- W4280491003 created "2022-05-22" @default.
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- W4280491003 date "2022-05-16" @default.
- W4280491003 modified "2023-09-26" @default.
- W4280491003 title "N-decanoyl-homoserine Lactone Inhibits Primary Root Growth via a Cascade Involving Ca2+, ROS, MPK and NO in Arabidopsis thaliana" @default.
- W4280491003 doi "https://doi.org/10.21203/rs.3.rs-1642250/v1" @default.
- W4280491003 hasPublicationYear "2022" @default.
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