Abstract
Melatonin is among one of the promising agents able to protect agricultural plants from the adverse action of different stressors, including salinity. We aimed to investigate the effects of melatonin priming (0.1, 1.0 and 10 µM) on salt-stressed potato plants (125 mM NaCl), by studying the growth parameters, photochemical activity of photosystem II, water status, ion content and antioxidant system activity. Melatonin as a pleiotropic signaling molecule was found to decrease the negative effect of salt stress on stolon formation, tissue water content and ion status without a significant effect on the expression of Na+/H+-antiporter genes localized on the vacuolar (NHX1 to NHX3) and plasma membrane (SOS1). Melatonin effectively decreases the accumulation of lipid peroxidation products in potato leaves in the whole range of concentrations studied. A melatonin-induced dose-dependent increase in Fv/Fm together with a decrease in uncontrolled non-photochemical dissipation Y(NO) also indicates decreased oxidative damage. The observed protective ability of melatonin was unlikely due to its influence on antioxidant enzymes, since neither SOD nor peroxidase were activated by melatonin. Melatonin exerted positive effects on the accumulation of water-soluble low-molecular-weight antioxidants, proline and flavonoids, which could aid in decreasing oxidative stress. The most consistent positive effect was observed on the accumulation of carotenoids, which are well-known lipophilic antioxidants playing an important role in the protection of photosynthesis from oxidative damage. Finally, it is possible that melatonin accumulated during pretreatment could exert direct antioxidative effects due to the ROS scavenging activity of melatonin molecules.
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Claims 9
Claim · model-written summary
Melatonin as a pleiotropic signaling molecule was found to decrease the negative effect of salt stress on stolon formation
- Taxon
- Potato Plants
Solanum tuberosumt0 - Treatment
- Melatonine0
- Outcome
- stolon formatione0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Melatonin as a pleiotropic signaling molecule was found to decrease the negative effect of salt stress on stolon formation”
t0“Potato Plants”
t1“Priming Potato Plants with Melatonin”
Claim · model-written summary
tissue water content and ion status
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- Melatonint1
- Outcome
- tissue water content and ion statuse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue water content and ion status”
t0“Potato Plants”
t1“Priming Potato Plants with Melatonin”
Claim · model-written summary
without a significant effect on the expression of Na+/H+-antiporter genes localized on the vacuolar (NHX1 to NHX3) and plasma membrane (SOS1)
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- Melatonint1
- Gene
- NHX1 to NHX3e0
- Outcome
- expression of Na+/H+-antiporter genese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without a significant effect on the expression of Na+/H+-antiporter genes localized on the vacuolar (NHX1 to NHX3) and plasma membrane (SOS1)”
t0“Potato Plants”
t1“Priming Potato Plants with Melatonin”
Claim · model-written summary
Melatonin effectively decreases the accumulation of lipid peroxidation products in potato leaves in the whole range of concentrations studied
- Taxon
- potatoSolanum tuberosume0
- Organ / stage
- leavese0
- Treatment
- Melatonine0
- Outcome
- accumulation of lipid peroxidation productse0
- Direction
- decreasese0
- Qualifier
- whole range of concentrations studiede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Melatonin effectively decreases the accumulation of lipid peroxidation products in potato leaves in the whole range of concentrations studied”
Claim · model-written summary
A melatonin-induced dose-dependent increase in Fv/Fm
Not reportedTaxonComparator
Verbatim
e0“A melatonin-induced dose-dependent increase in Fv/Fm”
t0“Potato Plants”
t1“Priming Potato Plants with Melatonin”
Claim · model-written summary
decrease in uncontrolled non-photochemical dissipation Y(NO)
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- Melatonint1
- Outcome
- uncontrolled non-photochemical dissipation Y(NO)e0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decrease in uncontrolled non-photochemical dissipation Y(NO)”
t0“Potato Plants”
t1“Priming Potato Plants with Melatonin”
Claim · model-written summary
neither SOD nor peroxidase were activated by melatonin
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- melatonine0
- Outcome
- SOD nor peroxidasee0
- Direction
- neithere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neither SOD nor peroxidase were activated by melatonin”
t0“Potato Plants”
t1“Priming Potato Plants with Melatonin”
Claim · model-written summary
Melatonin exerted positive effects on the accumulation of water-soluble low-molecular-weight antioxidants, proline and flavonoids
- Treatment
- Melatonine0
- Outcome
- accumulation of water-soluble low-molecular-weight antioxidants, proline and flavonoidse0
- Direction
- positive effectse0
Not reportedTaxonComparator
Verbatim
e0“Melatonin exerted positive effects on the accumulation of water-soluble low-molecular-weight antioxidants, proline and flavonoids”
t0“Potato Plants”
t1“Priming Potato Plants with Melatonin”
Claim · model-written summary
The most consistent positive effect was observed on the accumulation of carotenoids
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- Melatonint1
- Outcome
- accumulation of carotenoidse0
- Direction
- positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most consistent positive effect was observed on the accumulation of carotenoids”
t0“Potato Plants”
t1“Priming Potato Plants with Melatonin”
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See all 5 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.