1. Glucosinolate Transporter1 involves in salt-induced jasmonate signaling and alleviates the repression of lateral root growth by salt in Arabidopsis.
- Author
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Kuo HY, Kang FC, and Wang YY
- Subjects
- Arabidopsis enzymology, Arabidopsis metabolism, Arabidopsis physiology, Arabidopsis Proteins metabolism, Gene Expression Regulation, Plant physiology, Monosaccharide Transport Proteins metabolism, Plant Roots enzymology, Plant Roots metabolism, Plant Roots physiology, Real-Time Polymerase Chain Reaction, Salt Stress, Arabidopsis growth & development, Arabidopsis Proteins physiology, Cyclopentanes metabolism, Monosaccharide Transport Proteins physiology, Oxylipins metabolism, Plant Growth Regulators metabolism, Plant Roots growth & development, Signal Transduction physiology
- Abstract
Salt stress has negative impact on plant development and growth. Jasmonic acid (JA), a phytohormone, has been shown to involve in salt-induced inhibition of primary root growth. The Arabidopsis Glucosinolate transporter1 (GTR1/NPF2.10) is characterized as a JA-Ile, a bioactive form of JA, transporter. However, whether GTR1 participates in salt responses is not clear. In this study, we confirmed that GTR1 is induced by both JA and salinity. Salt-induced JA signaling is affected in gtr1 mutant. The JA responsive genes, JAZ1, JAZ5, MYC2, LOX3, are down-regulated in gtr1 mutant. Phenotypic analyses showed that the salinity-induced lateral root growth inhibition is enhanced in gtr1 mutant, suggesting that GTR1 plays a positive role in lateral root development under salt stress. Interestingly, the expression of a Na
+ transporter, HKT1, is upregulated in gtr1. Since HKT1 is a negative regulator for lateral root development under salt stress, we proposed that GTR1 alleviates the repression of lateral root development by salt stress by mediating JA signaling and repressing HKT1 expression. This study demonstrates that GTR1 is the molecular link between salt stress, JA signaling, and lateral root development., Competing Interests: Declaration of Competing Interest The authors have no conflicts of interest to declare., (Copyright © 2020 Elsevier B.V. All rights reserved.) more...- Published
- 2020
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