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- W2278938247 abstract "Serotonin (5‐hydroxytryptamine) is a bioactive indoleamine with neurotransmitter function in vertebrates, which represents an emerging signaling molecule in plants, playing key roles in the development and defense. In this study, the role of reactive oxygen species ( ROS ) and jasmonic acid ( JA )–ethylene (Et) signaling in root developmental alterations induced by serotonin was investigated. An Arabidopsis thaliana mutant defective at the RADICAL‐INDUCED CELL DEATH1 ( RCD1 ) locus was resistant to paraquat‐induced ROS accumulation in primary roots and showed decreased inhibition or root growth in response to serotonin. A suite of JA ‐ and Et‐related mutants including coronatine insensitive1 , jasmonic acid resistant1 ( jar1 ), etr1 , ein2 and ein3 showed tolerance to serotonin in the inhibition of primary root growth and ROS redistribution within the root tip when compared with wild‐type ( WT ) seedlings. Competence assays between serotonin and AgNO 3 , a well‐known blocker of Et action, showed that primary root growth in medium supplemented with serotonin was normalized by AgNO 3 , whereas roots of eto3 , an Et overproducer mutant, were oversensitive to serotonin. Comparison of ROS levels in WT , etr1 , jar1 and rcd1 primary root tips using the ROS ‐specific probe 2′,7′‐dichlorofluorescein diacetate and confocal imaging showed that serotonin inhibition of primary root growth likely occurs independently of its conversion into melatonin. Our results provide compelling evidence that serotonin affects ROS distribution in roots, involving RCD1 and components of the JA –Et signaling pathways." @default.
- W2278938247 created "2016-06-24" @default.
- W2278938247 creator A5008719049 @default.
- W2278938247 creator A5052451940 @default.
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- W2278938247 date "2016-03-30" @default.
- W2278938247 modified "2023-10-18" @default.
- W2278938247 title "Serotonin modulates <i>Arabidopsis</i> root growth via changes in reactive oxygen species and jasmonic acid–ethylene signaling" @default.
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- W2278938247 doi "https://doi.org/10.1111/ppl.12429" @default.
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