Abstract
Climate change can alter precipitation patterns, disrupting the natural water cycle and generating drought periods that negatively impact crop yield or plant survival. Novel biotechnological approaches are being developed to face water deficits. Specifically, molecular knowledge of the plant hormone abscisic acid (ABA) can be harnessed to develop genetic and chemical approaches to cope with abiotic stress. ABA receptor agonists are promising molecules that activate ABA signaling on demand and show long-lasting effects, in contrast to the exogenous application of ABA, which has a short half-life. In this work, we studied the effect of the iSB09 agonist on tomato plants grown under drought stress or well-watered conditions. iSB09 treatment induced stomatal closure in tomato through activation of PYL1-like and PYL4-like ABA receptors. Additionally, RNA-seq analyses reveal coordinated upregulation by ABA or iSB09 of the genes encoding enzymes involved in the synthesis of the osmoprotective galactinol and raffinose family of oligosaccharides. Foliar spraying of iSB09 under drought conditions anticipated the regulation of transpiration, promoted drought avoidance and increased water use efficiency in tomato plants. Physiological analysis of agonist-treated plants reveals increased CO2 assimilation and effective quantum yield of the photosystem II under drought conditions in iSB09-treated plants compared to mock-treated. Faster regulation of transpiration at the start of the drought period was achieved by iSB09 treatment, and, as a result, water consumption was reduced compared to mock-treated plants. Overall, the agonist treatment mounts the genome-wide transcriptional response to stress and increases water use efficiency under drought conditions and plant protection.
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Claims 11
Claim · model-written summary
iSB09 induced stomatal closure through PYL1-like and PYL4-like ABA receptors.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- iSB09 treatmente0
- Gene
- PYL1-like and PYL4-like ABA receptorse0
- Outcome
- stomatal closuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“iSB09 treatment induced stomatal closure in tomato through activation of PYL1-like and PYL4-like ABA receptors.”
Claim · model-written summary
ABA upregulated genes encoding enzymes for osmoprotective galactinol and raffinose-family oligosaccharide synthesis.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- ABAe0
- Outcome
- genes encoding enzymes involved in the synthesis of the osmoprotective galactinol and raffinose family of oligosaccharidese0
- Direction
- upregulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RNA-seq analyses reveal coordinated upregulation by ABA or iSB09 of the genes encoding enzymes involved in the synthesis of the osmoprotective galactinol and raffinose family of oligosaccharides.”
t1“tomato”
Claim · model-written summary
iSB09 upregulated genes encoding enzymes for osmoprotective galactinol and raffinose-family oligosaccharide synthesis.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- iSB09e0
- Outcome
- genes encoding enzymes involved in the synthesis of the osmoprotective galactinol and raffinose family of oligosaccharidese0
- Direction
- upregulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RNA-seq analyses reveal coordinated upregulation by ABA or iSB09 of the genes encoding enzymes involved in the synthesis of the osmoprotective galactinol and raffinose family of oligosaccharides.”
t1“tomato”
Claim · model-written summary
Foliar iSB09 under drought anticipated transpiration regulation.
- Taxon
- tomato plantsSolanum lycopersicume0
- Treatment
- Foliar spraying of iSB09e0
- Outcome
- regulation of transpiratione0
- Direction
- anticipatede0
- Qualifier
- under drought conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spraying of iSB09 under drought conditions anticipated the regulation of transpiration, promoted drought avoidance and increased water use efficiency in tomato plants.”
Claim · model-written summary
Foliar iSB09 promoted drought avoidance in tomato.
- Taxon
- tomato plantsSolanum lycopersicume0
- Treatment
- Foliar spraying of iSB09e0
- Outcome
- drought avoidancee0
- Direction
- promotede0
- Qualifier
- under drought conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spraying of iSB09 under drought conditions anticipated the regulation of transpiration, promoted drought avoidance and increased water use efficiency in tomato plants.”
Claim · model-written summary
Foliar iSB09 increased tomato water use efficiency under drought.
- Taxon
- tomato plantsSolanum lycopersicume0
- Treatment
- Foliar spraying of iSB09e0
- Outcome
- water use efficiencye0
- Direction
- increasede0
- Qualifier
- under drought conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spraying of iSB09 under drought conditions anticipated the regulation of transpiration, promoted drought avoidance and increased water use efficiency in tomato plants.”
Claim · model-written summary
iSB09 increased CO2 assimilation under drought relative to mock treatment.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- iSB09-treated plantse0
- Outcome
- CO2 assimilatione0
- Direction
- increasede0
- Qualifier
- under drought conditionse0
- Comparator
- mock-treatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological analysis of agonist-treated plants reveals increased CO2 assimilation and effective quantum yield of the photosystem II under drought conditions in iSB09-treated plants compared to mock-treated.”
t1“tomato”
Claim · model-written summary
iSB09 increased effective quantum yield of photosystem II under drought relative to mock treatment.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- iSB09-treated plantse0
- Outcome
- effective quantum yield of the photosystem IIe0
- Direction
- increasede0
- Qualifier
- under drought conditionse0
- Comparator
- mock-treatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological analysis of agonist-treated plants reveals increased CO2 assimilation and effective quantum yield of the photosystem II under drought conditions in iSB09-treated plants compared to mock-treated.”
t1“tomato”
Claim · model-written summary
iSB09 caused faster transpiration regulation at drought onset.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- iSB09 treatmente0
- Outcome
- regulation of transpiratione0
- Direction
- Fastere0
- Qualifier
- at the start of the drought periode0
- Comparator
- mock-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Faster regulation of transpiration at the start of the drought period was achieved by iSB09 treatment, and, as a result, water consumption was reduced compared to mock-treated plants.”
t1“tomato”
Claim · model-written summary
iSB09 reduced water consumption relative to mock treatment.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- iSB09 treatmente0
- Outcome
- water consumptione0
- Direction
- reducede0
- Comparator
- mock-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Faster regulation of transpiration at the start of the drought period was achieved by iSB09 treatment, and, as a result, water consumption was reduced compared to mock-treated plants.”
t1“tomato”
Claim · model-written summary
The agonist mounted a genome-wide transcriptional stress response.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- agonist treatmente0
- Outcome
- genome-wide transcriptional response to stresse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, the agonist treatment mounts the genome-wide transcriptional response to stress and increases water use efficiency under drought conditions and plant protection.”
t1“tomato”
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