Abstract
Aluminum toxicity poses a significant constraint on crop production in acidic soils. While phytohormones are recognized for their pivotal role in mediating plant responses to aluminum stress, the specific involvement of gibberellin (GA) in regulating aluminum tolerance remains unexplored. In this study, we demonstrate that external GA exacerbates the inhibitory impact of aluminum stress on root growth of rice seedlings, concurrently promoting reactive oxygen species (ROS) accumulation. Furthermore, rice plants overexpressing the GA synthesis gene SD1 exhibit enhanced sensitivity to aluminum stress. In contrast, the slr1 gain-of-function mutant, characterized by impeded GA signaling, displays enhanced tolerance to aluminum stress, suggesting the negative regulatory role of GA in rice resistance to aluminum-induced toxicity. We also reveal that GA application suppresses the expression of crucial aluminum tolerance genes in rice, including Al resistance transcription factor 1 (ART1), Nramp aluminum transporter 1 (OsNramp4), and Sensitive to Aluminum 1 (SAL1). Conversely, the slr1 mutant exhibits up-regulated expression of these genes compared to the wild type. In summary, our results shed light on the inhibitory effect of GA in rice resistance to aluminum stress, contributing to a theoretical foundation for unraveling the intricate mechanisms of plant hormones in regulating aluminum tolerance.
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Claims 6
Claim · model-written summary
External GA exacerbated the inhibition of rice root growth by aluminum stress.
- Taxon
- rice
Oryza sativae1 - Treatment
- external GAe1
- Outcome
- root growthe1
- Direction
- exacerbatese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“external GA exacerbates the inhibitory impact of aluminum stress on root growth of rice seedlings, concurrently promoting reactive oxygen species (ROS) accumulation”
Claim · model-written summary
External GA promoted reactive oxygen species accumulation in rice.
- Taxon
- riceOryza sativae1
- Treatment
- external GAe1
- Outcome
- reactive oxygen species (ROS) accumulatione1
- Direction
- promotinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“external GA exacerbates the inhibitory impact of aluminum stress on root growth of rice seedlings, concurrently promoting reactive oxygen species (ROS) accumulation”
Claim · model-written summary
Rice overexpressing the GA synthesis gene SD1 showed enhanced sensitivity to aluminum stress.
- Taxon
- riceOryza sativae2
- Treatment
- overexpressing the GA synthesis gene SD1e2
- Gene
- SD1e2
- Outcome
- sensitivity to aluminum stresse2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“rice plants overexpressing the GA synthesis gene SD1 exhibit enhanced sensitivity to aluminum stress”
Claim · model-written summary
The slr1 gain-of-function mutant showed enhanced tolerance to aluminum stress.
- Taxon
- riceOryza sativae1
- Material
- slr1 gain-of-function mutante3
- Treatment
- aluminum stresse3
- Gene
- slr1e3
- Outcome
- tolerancee3
- Direction
- enhancede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“external GA exacerbates the inhibitory impact of aluminum stress on root growth of rice seedlings, concurrently promoting reactive oxygen species (ROS) accumulation”
e3“the slr1 gain-of-function mutant, characterized by impeded GA signaling, displays enhanced tolerance to aluminum stress”
Claim · model-written summary
GA application suppressed the expression of aluminum tolerance genes in rice.
- Taxon
- riceOryza sativae4
- Treatment
- GA applicatione4
- Gene
- Al resistance transcription factor 1 (ART1), Nramp aluminum transporter 1 (OsNramp4), and Sensitive to Aluminum 1 (SAL1)e4
- Outcome
- expression of crucial aluminum tolerance genese4
- Direction
- suppressese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“GA application suppresses the expression of crucial aluminum tolerance genes in rice, including Al resistance transcription factor 1 (ART1), Nramp aluminum transporter 1 (OsNramp4), and Sensitive to Aluminum 1 (SAL1)”
Claim · model-written summary
The slr1 mutant showed up-regulated expression of the tolerance genes compared with the wild type.
- Taxon
- riceOryza sativae4
- Material
- slr1 mutante5
- Outcome
- expression of these genese5
- Direction
- up-regulatede5
- Comparator
- wild typee5
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“GA application suppresses the expression of crucial aluminum tolerance genes in rice, including Al resistance transcription factor 1 (ART1), Nramp aluminum transporter 1 (OsNramp4), and Sensitive to Aluminum 1 (SAL1)”
e5“the slr1 mutant exhibits up-regulated expression of these genes compared to the wild type”
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