Abstract
Salinity is a severe abiotic stress that affects irrigated croplands. Jasmonate (JA) is an essential hormone involved in plant defense against herbivory and in responses to abiotic stress. However, the relationship between the salt stress response and the JA pathway in Arabidopsis thaliana is not well understood at molecular and cellular levels. In this work we investigated the activation of JA signaling by NaCl and its effect on primary root growth. We found that JA-responsive JAZ genes were up-regulated by salt stress in a COI1-dependent manner in the roots. Using a JA-Ile sensor we demonstrated that activation of JA signaling by salt stress occurs in the meristematic zone and stele of the differentiation zone and that this activation was dependent on JAR1 and proteasome functions. Another finding is that the elongation zone (EZ) and its cortical cells were significantly longer in JA-related mutants (AOS, COI1, JAZ3 and MYC2/3/4 genes) compared with wild-type plants under salt stress, revealing the participation of the canonical JA signaling pathway. Noteworthy, osmotic stress - a component of salt stress - inhibited cell elongation in the EZ in a COI1-dependent manner. We propose that salt stress triggers activation of the JA signaling pathway followed by inhibition of cell elongation in the EZ. We have shown that salt-inhibited root growth partially involves the jasmonate signaling pathway in Arabidopsis.
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Claims 7
Claim · model-written summary
Salt stress upregulated JAZ genes in roots in a COI1 dependent manner.
- Taxon
- Arabidopsis
Arabidopsist0 - Treatment
- salt stresse0
- Gene
- JAZ genese0
- Outcome
- JA-responsive JAZ genese0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JA-responsive JAZ genes were up-regulated by salt stress in a COI1-dependent manner in the roots”
t0“Arabidopsis”
Claim · model-written summary
Salt activated JA signaling in the meristematic zone and differentiation zone stele.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- meristematic zone and stele of the differentiation zonee0
- Treatment
- salt stresse0
- Gene
- JAR1e0
- Outcome
- activation of JA signalinge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activation of JA signaling by salt stress occurs in the meristematic zone and stele of the differentiation zone and that this activation was dependent on JAR1 and proteasome functions”
t0“Arabidopsis”
Claim · model-written summary
The JA signaling activation depended on JAR1 and proteasome functions.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- JAR1e0
- Outcome
- this activatione0
- Qualifier
- proteasome functionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this activation was dependent on JAR1 and proteasome functions”
t0“Arabidopsis”
Claim · model-written summary
JA related mutants had longer elongation zones than wild type under salt stress.
- Taxon
- ArabidopsisArabidopsist0
- Material
- JA-related mutantse0
- Treatment
- salt stresse0
- Outcome
- elongation zone (EZ)e0
- Direction
- longere0
- Comparator
- wild-type plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the elongation zone (EZ) and its cortical cells were significantly longer in JA-related mutants (AOS, COI1, JAZ3 and MYC2/3/4 genes) compared with wild-type plants under salt stress”
t0“Arabidopsis”
Claim · model-written summary
JA related mutants had longer cortical cells than wild type under salt stress.
- Taxon
- ArabidopsisArabidopsist0
- Material
- JA-related mutantse0
- Outcome
- cortical cellse0
- Direction
- longere0
- Comparator
- wild-type plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the elongation zone (EZ) and its cortical cells were significantly longer in JA-related mutants (AOS, COI1, JAZ3 and MYC2/3/4 genes) compared with wild-type plants under salt stress”
t0“Arabidopsis”
Claim · model-written summary
Osmotic stress inhibited elongation zone cell elongation in a COI1 dependent manner.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- osmotic stresse0
- Gene
- COI1e0
- Outcome
- cell elongation in the EZe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“osmotic stress - a component of salt stress - inhibited cell elongation in the EZ in a COI1-dependent manner”
t0“Arabidopsis”
Claim · model-written summary
Salt inhibited root growth partly through jasmonate signaling.
- Taxon
- ArabidopsisArabidopsise0
- Outcome
- root growthe0
- Direction
- salt-inhibitede0
- Qualifier
- jasmonate signaling pathwaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt-inhibited root growth partially involves the jasmonate signaling pathway in Arabidopsis”
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