Abstract
Salt stress is a severe environmental factor that detrimentally affects wheat growth and production worldwide. Previous studies illustrate that exogenous jasmonic acid (JA) significantly improved salt tolerance in plants. However, little is known about the underlying molecular mechanisms of JA induced physiochemical changes in wheat seedlings under salt stress conditions. In this study, biophysiochemical and transcriptome analysis was conducted to explore the mechanisms of exogenous JA induced salt tolerance in wheat. Exogenous JA increased salt tolerance of wheat seedlings by alleviating membrane lipid oxidation, improving root morphology, enhancing the contents of ABA, JA and SA and increasing relative water content. In the RNA-seq profiles, we identified a total of 54,263 unigenes and 1,407 unigenes showed differentially expressed patterns in JA pretreated wheat seedlings exposed to salt stress comparing to those with salt stress alone. Subsequently, gene ontology (GO) and KEGG pathway enrichment analysis characterized that DEGs involved in linoleic acid metabolism and plant hormone signal transduction pathways were up-regulated predominantly in JA pretreated wheat seedlings exposed to salt stress. We noticed that genes that involved in antioxidative defense system and that encoding transcription factors were mainly up- or down-regulated. Moreover, SOD, POD, CAT and APX activities were increased in JA pretreated wheat seedlings exposed to salt stress, which is in accordance with the transcript profiles of the relevant genes. Taken together, our results demonstrate that the genes and enzymes involved in physiological and biochemical processes of antioxidant system, plant hormones and transcriptional regulation contributed to JA-mediated enhancement of salt tolerance in wheat. These findings will facilitate the elucidation of the potential molecular mechanisms associated with JA-dependent amelioration of salt stress in wheat and lay theoretical foundations for future studies concerning the improvement of plant tolerance to abiotic environmental stresses.
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Claims 12
Claim · model-written summary
Exogenous JA increased salt tolerance of wheat seedlings.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- seedlingse1
- Treatment
- Exogenous JAe1
- Outcome
- salt tolerancee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“Exogenous JA increased salt tolerance of wheat seedlings”
Claim · model-written summary
Exogenous JA alleviated membrane lipid oxidation in wheat seedlings under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Exogenous JAe1
- Outcome
- membrane lipid oxidatione2
- Direction
- alleviatinge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“Exogenous JA increased salt tolerance of wheat seedlings”
e2“by alleviating membrane lipid oxidation”
Claim · model-written summary
Exogenous JA improved root morphology of wheat seedlings under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Exogenous JAe1
- Outcome
- root morphologye3
- Direction
- improvinge3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“Exogenous JA increased salt tolerance of wheat seedlings”
e3“improving root morphology”
Claim · model-written summary
Exogenous JA enhanced the contents of ABA, JA and SA in wheat seedlings under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Exogenous JAe1
- Outcome
- contents of ABA, JA and SAe4
- Direction
- enhancinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“Exogenous JA increased salt tolerance of wheat seedlings”
e4“enhancing the contents of ABA, JA and SA”
Claim · model-written summary
Exogenous JA increased relative water content of wheat seedlings under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Exogenous JAe1
- Outcome
- relative water contente5
- Direction
- increasinge5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“Exogenous JA increased salt tolerance of wheat seedlings”
e5“increasing relative water content”
Claim · model-written summary
RNA-seq identified 54,263 unigenes in the JA and salt study of wheat.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- unigenese6
- Value
- 54,263 unigenese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e6“we identified a total of 54,263 unigenes”
Claim · model-written summary
1,407 unigenes were differentially expressed in JA pretreated wheat seedlings under salt stress compared with salt stress alone.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- JA pretreatede7
- Outcome
- differentially expressed patternse7
- Value
- 1,407 unigenese7
- Comparator
- salt stress alonee7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e7“1,407 unigenes showed differentially expressed patterns in JA pretreated wheat seedlings exposed to salt stress comparing to those with salt stress alone”
Claim · model-written summary
Differentially expressed genes in linoleic acid metabolism and plant hormone signal transduction pathways were predominantly up-regulated in JA pretreated wheat seedlings under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- JA pretreatede1
- Outcome
- DEGs involved in linoleic acid metabolism and plant hormone signal transduction pathwayse1
- Direction
- up-regulatede1
- Qualifier
- predominantlye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“DEGs involved in linoleic acid metabolism and plant hormone signal transduction pathways were up-regulated predominantly in JA pretreated wheat seedlings exposed to salt stress”
Claim · model-written summary
Genes for antioxidative defence and transcription factors were mainly up- or down-regulated in JA pretreated wheat seedlings under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- JA pretreatede1
- Outcome
- genes that involved in antioxidative defense system and that encoding transcription factorse2
- Direction
- mainly up- or down-regulatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“DEGs involved in linoleic acid metabolism and plant hormone signal transduction pathways were up-regulated predominantly in JA pretreated wheat seedlings exposed to salt stress”
e2“genes that involved in antioxidative defense system and that encoding transcription factors were mainly up- or down-regulated”
Claim · model-written summary
SOD, POD and CAT activities increased in JA pretreated wheat seedlings under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- JA pretreatede1
- Outcome
- SOD, POD, CATe1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“SOD, POD, CAT and APX activities were increased in JA pretreated wheat seedlings exposed to salt stress”
Claim · model-written summary
APX activity increased in JA pretreated wheat seedlings under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- JA pretreatede1
- Outcome
- APX activitiese1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“APX activities were increased in JA pretreated wheat seedlings exposed to salt stress”
Claim · model-written summary
Genes and enzymes of the antioxidant system, plant hormones and transcriptional regulation likely contributed to JA-mediated enhancement of wheat salt tolerance.
- Taxon
- wheatTriticum aestivumt0
- Gene
- genes and enzymese1
- Outcome
- salt tolerancee1
- Qualifier
- JA-mediated enhancemente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance of wheat”
e1“Taken together, our results demonstrate that the genes and enzymes involved in physiological and biochemical processes of antioxidant system, plant hormones and transcriptional regulation contributed to JA-mediated enhancement of salt tolerance in wheat”
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See all 7 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.