Abstract
Plants irrigated with saline solutions undergo osmotic and oxidative stresses, which affect their growth, photosynthetic activity and yield. Therefore, the use of saline water for irrigation, in addition to the increasing soil salinity, is one of the major threats to crop productivity worldwide. Plant tolerance to stressful conditions can be improved using different strategies, i.e., seed priming and acclimation, which elicit morphological and biochemical responses to overcome stress. In this work, we evaluated the combined effect of priming and acclimation on salt stress response of a tomato cultivar (Solanum lycopersicum L.), very sensitive to salinity. Chemical priming of seeds was performed by treating seeds with polyamines (PAs): 2.5 mM putrescine (PUT), 2.5 mM spermine (SPM) and 2.5 mM spermidine (SPD). Germinated seeds of primed and non-primed (controls) were sown in non-saline soil. The acclimation consisted of irrigating the seedlings for 2 weeks with tap water, followed by irrigation with saline and non-saline water for 4 weeks. At the end of the growth period, morphological, physiological and biochemical parameters were determined. The positive effects of combined treatments were evident, when primed plants were compared to non-primed, grown under the same conditions. Priming with PAs improved tolerance to salt stress, reduced the negative effects of salinity on growth, improved membrane integrity, and increased photosynthetic pigments, proline and enzymatic and non-enzymatic antioxidant responses in all salt-exposed plants. These results may open new perspectives and strategies to increase tolerance to salt stress in sensitive species, such as tomato.
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Claims 7
Claim · model-written summary
Polyamine priming improved salt-stress tolerance.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- Priming with PAse0
- Outcome
- tolerance to salt stresse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Priming with PAs improved tolerance to salt stress”
t0“Tomato”
Claim · model-written summary
Polyamine priming reduced salinity effects on growth.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Priming with PAse0
- Outcome
- negative effects of salinity on growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Priming with PAs improved tolerance to salt stress, reduced the negative effects of salinity on growth”
t0“Tomato”
Claim · model-written summary
Polyamine priming improved membrane integrity.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Priming with PAse1
- Outcome
- membrane integritye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improved membrane integrity”
e1“Priming with PAs”
t0“Tomato”
Claim · model-written summary
Polyamine priming increased photosynthetic pigments.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Priming with PAse1
- Outcome
- photosynthetic pigmentse0
- Direction
- increasede0
- Qualifier
- salt-exposed plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased photosynthetic pigments, proline and enzymatic and non-enzymatic antioxidant responses in all salt-exposed plants”
e1“Priming with PAs”
t0“Tomato”
Claim · model-written summary
Polyamine priming increased proline.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Priming with PAse1
- Outcome
- prolinee0
- Direction
- increasede0
- Qualifier
- salt-exposed plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased photosynthetic pigments, proline and enzymatic and non-enzymatic antioxidant responses in all salt-exposed plants”
e1“Priming with PAs”
t0“Tomato”
Claim · model-written summary
Polyamine priming increased enzymatic antioxidant responses.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Priming with PAse1
- Outcome
- enzymatic antioxidant responsese0
- Direction
- increasede0
- Qualifier
- salt-exposed plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased photosynthetic pigments, proline and enzymatic and non-enzymatic antioxidant responses in all salt-exposed plants”
e1“Priming with PAs”
t0“Tomato”
Claim · model-written summary
Polyamine priming increased non-enzymatic antioxidant responses.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Priming with PAse1
- Outcome
- non-enzymatic antioxidant responsese0
- Direction
- increasede0
- Qualifier
- salt-exposed plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased photosynthetic pigments, proline and enzymatic and non-enzymatic antioxidant responses in all salt-exposed plants”
e1“Priming with PAs”
t0“Tomato”
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