Abstract
Abstract The escalating issue of global soil salinization has significantly impacted the growth and productivity of rice ( Oryza sativa L). To investigate the mechanisms underlying rice seedlings’ response to salt stress, transcriptome analysis to examine gene expression changes in salt‐tolerant and salt‐sensitive rice varieties was conducted. Salt‐tolerant landrace rice, Faguodao, and salt‐sensitive cultivar rice, Nipponbare, were used in this study. Both were subjected to 125 mM NaCl treatment at the seedling stage, and transcriptome sequencing was employed to analyze stress‐responsive genes and regulatory networks. Differentially expressed genes in both rice varieties under salt stress were enriched in the abscisic acid (ABA) and jasmonic acid (JA) hormone signaling pathways. Key genes such as OsABIL1 (ABA signaling component) and OsJAZ11 (JA pathway repressor) were identified as pivotal regulators. OsABIL1 promoted ion homeostasis under salt stress, while OsJAZ11 suppression indicated JA signaling inhibition, highlighting ABA's dominance in salt tolerance. Exogenous ABA application significantly alleviated salt stress damage in both genotypes by modulating ion homeostasis, whereas exogenous JA suppressed ABA‐responsive gene expression (e.g., OsPYL4 and OsbZIP23), indicating an antagonistic interaction between the two hormones. Under salt stress, exogenous ABA effectively alleviates the damage in both salt‐tolerant and salt‐sensitive rice. In contrast, exogenous JA suppressed the expression of ABA‐related genes, diminishing ABA's alleviating effects and indicating an antagonistic interaction between ABA and JA in regulating rice salt tolerance. This study provides valuable insights into the intricate regulatory network of ABA and JA regulating salt tolerance in rice seedlings.
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Claims 7
Claim · model-written summary
Salt-responsive genes in both rice varieties were enriched in ABA and JA signaling pathways.
- Taxon
- rice
Oryza sativae0 - Treatment
- salt stresse0
- Outcome
- Differentially expressed genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differentially expressed genes in both rice varieties under salt stress were enriched in the abscisic acid (ABA) and jasmonic acid (JA) hormone signaling pathways.”
Claim · model-written summary
OsABIL1 was identified as a pivotal regulator and promoted ion homeostasis under salt stress.
- Taxon
- riceOryza sativat0
- Treatment
- salt stresse0
- Gene
- OsABIL1e0
- Outcome
- ion homeostasise0
- Direction
- promotede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Key genes such as OsABIL1 (ABA signaling component) and OsJAZ11 (JA pathway repressor) were identified as pivotal regulators. OsABIL1 promoted ion homeostasis under salt stress”
t0“rice varieties”
Claim · model-written summary
OsJAZ11 suppression indicated inhibition of JA signaling.
- Taxon
- riceOryza sativat0
- Gene
- OsJAZ11e0
- Outcome
- JA signaling inhibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“OsJAZ11 suppression indicated JA signaling inhibition”
t0“rice varieties”
Claim · model-written summary
Exogenous ABA significantly alleviated salt damage in both genotypes.
- Taxon
- riceOryza sativat0
- Treatment
- Exogenous ABA applicatione0
- Outcome
- salt stress damagee0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous ABA application significantly alleviated salt stress damage in both genotypes”
t0“rice varieties”
Claim · model-written summary
Exogenous ABA modulated ion homeostasis in both genotypes under salt stress.
- Taxon
- riceOryza sativat0
- Treatment
- Exogenous ABA applicatione0
- Outcome
- ion homeostasise0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous ABA application significantly alleviated salt stress damage in both genotypes by modulating ion homeostasis”
t0“rice varieties”
Claim · model-written summary
Exogenous JA suppressed ABA-responsive gene expression.
- Taxon
- riceOryza sativat0
- Treatment
- exogenous JAe0
- Gene
- OsPYL4 and OsbZIP23e0
- Outcome
- ABA‐responsive gene expressione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous JA suppressed ABA‐responsive gene expression (e.g., OsPYL4 and OsbZIP23)”
t0“rice varieties”
Claim · model-written summary
Exogenous JA diminished ABA’s alleviating effect on salt damage.
- Taxon
- riceOryza sativat0
- Treatment
- exogenous JAe0
- Outcome
- ABA's alleviating effectse0
- Direction
- diminishinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous JA suppressed the expression of ABA‐related genes, diminishing ABA's alleviating effects”
t0“rice varieties”
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