Abstract
Drought is a major environmental stress that severely affects plant growth and crop productivity. FRIGIDA (FRI) is a key regulator of flowering time and drought tolerance in model plants. However, little is known regarding its functions in woody plants, including citrus. Thus, we explored the functional role of the citrus FRI ortholog (CiFRI) under drought. Drought treatment induced CiFRI expression. CiFRI overexpression enhanced drought tolerance in transgenic Arabidopsis and citrus, while CiFRI suppression increased drought susceptibility in citrus. Moreover, transcriptomic profiling under drought conditions suggested that CiFRI overexpression altered the expression of numerous genes involved in the stress response, hormone biosynthesis, and signal transduction. Mechanistic studies revealed that citrus dehydrin likely protects CiFRI from stress-induced degradation, thereby enhancing plant drought tolerance. In addition, a citrus brassinazole-resistant (BZR) transcription factor family member (CiBZR1) directly binds to the CiFRI promoter to activate its expression under drought conditions. CiBZR1 also enhanced drought tolerance in transgenic Arabidopsis and citrus. These findings further our understanding of the molecular mechanisms underlying the CiFRI-mediated drought stress response in citrus.
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Claims 10
Claim · model-written summary
Drought induced CiFRI expression.
CitrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought treatment induced CiFRI expression.”
t0“Citrus”
Claim · model-written summary
CiFRI overexpression enhanced drought tolerance in transgenic Arabidopsis.
- Taxon
- Arabidopsis
Arabidopsise0 - Treatment
- CiFRI overexpressione0
- Gene
- CiFRIe0
- Outcome
- drought tolerancee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CiFRI overexpression enhanced drought tolerance in transgenic Arabidopsis and citrus, while CiFRI suppression increased drought susceptibility in citrus.”
Claim · model-written summary
CiFRI overexpression enhanced drought tolerance in citrus.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CiFRI overexpression enhanced drought tolerance in transgenic Arabidopsis and citrus, while CiFRI suppression increased drought susceptibility in citrus.”
Claim · model-written summary
CiFRI suppression increased citrus drought susceptibility.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CiFRI overexpression enhanced drought tolerance in transgenic Arabidopsis and citrus, while CiFRI suppression increased drought susceptibility in citrus.”
Claim · model-written summary
CiFRI overexpression changed stress response, hormone biosynthesis, and signaling gene expression under drought.
- Treatment
- CiFRI overexpressione0
- Gene
- CiFRIe0
- Outcome
- expression of numerous genes involved in the stress response, hormone biosynthesis, and signal transductione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CiFRI overexpression altered the expression of numerous genes involved in the stress response, hormone biosynthesis, and signal transduction.”
t0“Citrus”
Claim · model-written summary
Citrus dehydrin likely protects CiFRI from stress-induced degradation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“citrus dehydrin likely protects CiFRI from stress-induced degradation, thereby enhancing plant drought tolerance.”
Claim · model-written summary
Citrus dehydrin likely enhances drought tolerance through CiFRI protection.
- Gene
- CiFRIe0
- Outcome
- plant drought tolerancee0
- Qualifier
- citrus dehydrin likely protects CiFRI from stress-induced degradatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“citrus dehydrin likely protects CiFRI from stress-induced degradation, thereby enhancing plant drought tolerance.”
Claim · model-written summary
CiBZR1 directly binds the CiFRI promoter and activates its expression under drought.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CiBZR1) directly binds to the CiFRI promoter to activate its expression under drought conditions.”
t0“Citrus”
Claim · model-written summary
CiBZR1 enhanced drought tolerance in transgenic Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- CiBZR1e0
- Gene
- CiBZR1e0
- Outcome
- drought tolerancee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CiBZR1 also enhanced drought tolerance in transgenic Arabidopsis and citrus.”
Claim · model-written summary
CiBZR1 enhanced drought tolerance in citrus.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CiBZR1 also enhanced drought tolerance in transgenic Arabidopsis and citrus.”
The same questions in other papers
drought · molecular: expression · CitrusPositive and negative results
6 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- no effect
7 papers more in this group
See all 11 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.