Abstract
The effect of melatonin (MT) on potato plants under drought stress is still unclear in the available literature. Here, we studied the effect of MT as a foliar application at 0, 0.05, 0.1, and 0.2 mM on potato plants grown under well-watered and drought stressed conditions during the most critical period of early tuberization stage. The results indicated that under drought stress conditions, exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight, shoot dry weight, chlorophyll (Chl; a, b and a + b), leaf relative water content (RWC), free amino acids (FAA), non-reducing sugars, total soluble sugars, cell membrane stability index, superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX) compared to the untreated plants. Meanwhile, carotenoids, proline, methylglyoxal (MG), H2O2, lipid peroxidation (malondialdehyde; MDA) and abscisic acid (ABA) were significantly decreased compared to the untreated plants. These responses may reveal the protective role of MT against drought induced carbonyl/oxidative stress and enhancing the antioxidative defense systems. Furthermore, tuber yield was differentially responded to MT treatments under well-watered and drought stressed conditions. Since, applied-MT led to an obvious decrease in tuber yield under well-watered conditions. In contrast, under drought conditions, tuber yield was substantially increased by MT-treatments up to 0.1 mM. These results may imply that under water deficiency, MT can regulate the tuberization process in potato plants by hindering ABA transport from the root to shoot system, on the one hand, and by increasing the non-reducing sugars on the other hand.
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Claims 11
Claim · model-written summary
Melatonin increased shoot fresh and dry weights under drought.
- Taxon
- Potato Plants
Solanum tuberosumt0 - Treatment
- exogenous MTe0
- Outcome
- shoot fresh weight, shoot dry weighte0
- Direction
- improvede0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight, shoot dry weight, chlorophyll (Chl; a, b and a + b), leaf relative water content (RWC), free amino acids (FAA), non-reducing sugars, total soluble sugars, cell membrane stability index, superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX) compared to the untreated plants”
Claim · model-written summary
Melatonin improved chlorophyll and leaf relative water content under drought.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- exogenous MTe0
- Outcome
- chlorophyll (Chl; a, b and a + b), leaf relative water content (RWC)e0
- Direction
- improvede0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight, shoot dry weight, chlorophyll (Chl; a, b and a + b), leaf relative water content (RWC), free amino acids (FAA), non-reducing sugars, total soluble sugars, cell membrane stability index, superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX) compared to the untreated plants”
Claim · model-written summary
Melatonin improved free amino acids and sugars under drought.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- exogenous MTe0
- Outcome
- free amino acids (FAA), non-reducing sugars, total soluble sugarse0
- Direction
- improvede0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight, shoot dry weight, chlorophyll (Chl; a, b and a + b), leaf relative water content (RWC), free amino acids (FAA), non-reducing sugars, total soluble sugars, cell membrane stability index, superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX) compared to the untreated plants”
Claim · model-written summary
Melatonin improved membrane stability under drought.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- exogenous MTe0
- Outcome
- cell membrane stability indexe0
- Direction
- improvede0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight, shoot dry weight, chlorophyll (Chl; a, b and a + b), leaf relative water content (RWC), free amino acids (FAA), non-reducing sugars, total soluble sugars, cell membrane stability index, superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX) compared to the untreated plants”
Claim · model-written summary
Melatonin improved superoxide dismutase, catalase and guaiacol peroxidase under drought.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- exogenous MTe0
- Outcome
- superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (G-POX)e0
- Direction
- improvede0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight, shoot dry weight, chlorophyll (Chl; a, b and a + b), leaf relative water content (RWC), free amino acids (FAA), non-reducing sugars, total soluble sugars, cell membrane stability index, superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX) compared to the untreated plants”
Claim · model-written summary
Melatonin improved ascorbate peroxidase under drought.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- MTe0
- Outcome
- ascorbate peroxidase (APX)e0
- Direction
- improvede0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight, shoot dry weight, chlorophyll (Chl; a, b and a + b), leaf relative water content (RWC), free amino acids (FAA), non-reducing sugars, total soluble sugars, cell membrane stability index, superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX) compared to the untreated plants”
Claim · model-written summary
Melatonin reduced carotenoids, proline and methylglyoxal under drought.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- MTe1
- Outcome
- carotenoids, proline, methylglyoxal (MG)e0
- Direction
- decreasede0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“carotenoids, proline, methylglyoxal (MG), H2O2, lipid peroxidation (malondialdehyde; MDA) and abscisic acid (ABA) were significantly decreased compared to the untreated plants”
e1“exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight”
Claim · model-written summary
Melatonin reduced hydrogen peroxide, lipid peroxidation and abscisic acid under drought.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- MTe1
- Outcome
- H2O2, lipid peroxidation (malondialdehyde; MDA) and abscisic acid (ABA)e0
- Direction
- decreasede0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“carotenoids, proline, methylglyoxal (MG), H2O2, lipid peroxidation (malondialdehyde; MDA) and abscisic acid (ABA) were significantly decreased compared to the untreated plants”
e1“exogenous MT significantly (p ≤ 0.05) improved shoot fresh weight”
Claim · model-written summary
Applied melatonin decreased tuber yield with adequate water.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- applied-MTe0
- Outcome
- tuber yielde0
- Direction
- decreasee0
- Qualifier
- well-watered conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“applied-MT led to an obvious decrease in tuber yield under well-watered conditions”
Claim · model-written summary
Melatonin up to 0.1 mM increased tuber yield under drought.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- MT-treatments up to 0.1 mMe0
- Outcome
- tuber yielde0
- Direction
- increasede0
- Qualifier
- under drought conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“under drought conditions, tuber yield was substantially increased by MT-treatments up to 0.1 mM”
Claim · model-written summary
Authors suggest melatonin regulates tuberization through ABA transport and non-reducing sugars under water deficiency.
- Taxon
- potato plantsSolanum tuberosume0
- Treatment
- MTe0
- Outcome
- tuberization processe0
- Qualifier
- hindering ABA transport from the root to shoot systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Plants”
e0“under water deficiency, MT can regulate the tuberization process in potato plants by hindering ABA transport from the root to shoot system, on the one hand, and by increasing the non-reducing sugars on the other hand”
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1 paper more in this group
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.