Abstract
Salinity has a negative impact on plant growth, with photosynthesis being downregulated partially due to osmotic effect and enhanced cellular oxidation. Redox signaling contributes to the plant response playing thioredoxins (TRXs) a central role. In this work we explore the potential contribution of Arabidopsis TRXo1 to the photosynthetic response under salinity analyzing Arabidopsis wild-type (WT) and two Attrxo1 mutant lines in their growth under short photoperiod and higher light intensity than previous reported works. Stomatal development and apertures and the antioxidant, hormonal and metabolic acclimation are also analyzed. In control conditions mutant plants displayed less and larger developed stomata and higher pore size which could underlie their higher stomatal conductance, without being affected in other photosynthetic parameters. Under salinity, all genotypes displayed a general decrease in photosynthesis and the oxidative status in the Attrxo1 mutant lines was altered, with higher levels of H2O2 and NO but also higher ascorbate/glutathione (ASC/GSH) redox states than WT plants. Finally, sugar changes and increases in abscisic acid (ABA) and NO may be involved in the observed higher stomatal response of the TRXo1-altered plants. Therefore, the lack of AtTRXo1 affected stomata development and opening and the mutants modulate their antioxidant, metabolic and hormonal responses to optimize their adaptation to salinity.
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Claims 9
Claim · model-written summary
Attrxo1 mutants had fewer developed stomata in control conditions.
- Taxon
- Arabidopsis
Arabidopsise1 - Material
- mutant plantse0
- Organ / stage
- stomatae0
- Outcome
- less and larger developed stomatae0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In control conditions mutant plants displayed less and larger developed stomata and higher pore size which could underlie their higher stomatal conductance”
e1“Arabidopsis TRXo1”
Claim · model-written summary
Attrxo1 mutants had larger developed stomata in control conditions.
- Taxon
- ArabidopsisArabidopsise1
- Material
- mutant plantse0
- Outcome
- larger developed stomatae0
- Direction
- largere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In control conditions mutant plants displayed less and larger developed stomata and higher pore size which could underlie their higher stomatal conductance”
e1“Arabidopsis TRXo1”
Claim · model-written summary
Attrxo1 mutants had higher stomatal pore size and conductance in control conditions.
- Taxon
- ArabidopsisArabidopsise1
- Outcome
- pore sizee0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher pore size which could underlie their higher stomatal conductance”
e1“Arabidopsis TRXo1”
Claim · model-written summary
Other photosynthetic parameters were unaffected in control conditions.
- Taxon
- ArabidopsisArabidopsise1
- Outcome
- other photosynthetic parameterse0
- Direction
- without being affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without being affected in other photosynthetic parameters.”
e1“Arabidopsis TRXo1”
Claim · model-written summary
Salinity caused a general decrease in photosynthesis across genotypes.
- Taxon
- ArabidopsisArabidopsise1
- Treatment
- salinitye0
- Outcome
- photosynthesise0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salinity, all genotypes displayed a general decrease in photosynthesis”
e1“Arabidopsis TRXo1”
Claim · model-written summary
Under salinity, Attrxo1 mutants had higher H2O2 and NO than WT.
- Taxon
- ArabidopsisArabidopsise1
- Material
- Attrxo1 mutant linese0
- Outcome
- levels of H2O2 and NOe0
- Direction
- highere0
- Comparator
- WT plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the oxidative status in the Attrxo1 mutant lines was altered, with higher levels of H2O2 and NO but also higher ascorbate/glutathione (ASC/GSH) redox states than WT plants.”
e1“Arabidopsis TRXo1”
Claim · model-written summary
Under salinity, Attrxo1 mutants had higher ASC/GSH redox states than WT.
- Taxon
- ArabidopsisArabidopsise1
- Material
- Attrxo1 mutant linese0
- Outcome
- ascorbate/glutathione (ASC/GSH) redox statese0
- Direction
- highere0
- Comparator
- WT plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the oxidative status in the Attrxo1 mutant lines was altered, with higher levels of H2O2 and NO but also higher ascorbate/glutathione (ASC/GSH) redox states than WT plants.”
e1“Arabidopsis TRXo1”
Claim · model-written summary
Sugar changes and increases in ABA and NO may contribute to the greater stomatal response of TRXo1-altered plants.
- Taxon
- ArabidopsisArabidopsise1
- Compound
- abscisic acid (ABA) and NOe0
- Outcome
- higher stomatal responsee0
- Qualifier
- may be involvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sugar changes and increases in abscisic acid (ABA) and NO may be involved in the observed higher stomatal response of the TRXo1-altered plants.”
e1“Arabidopsis TRXo1”
Claim · model-written summary
The authors concluded that lack of AtTRXo1 affected stomatal development and opening.
- Taxon
- ArabidopsisArabidopsise1
- Gene
- AtTRXo1e0
- Outcome
- stomata development and openinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lack of AtTRXo1 affected stomata development and opening”
e1“Arabidopsis TRXo1”
The same questions in other papers
salinity · physiology: photosynthesis · ArabidopsisPositive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
3 papers more in this group
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.