Abstract
Melatonin “N-Acetyl-5-methoxytryptamine” (MT) has recently been considered as a new plant growth regulator with multiple physiological functions. Although many previous studies have confirmed that exogenous applied-MT can alleviate the deleterious effects of drought stress in many plant species, most of these studies were exclusive on seeds, seedlings, and young plants for a short period of their life cycles. Therefore, the knowledge of using MT as a potential promising agricultural foliar application to improve crop productivity and quality is still insufficient under adverse open field conditions. In this study, we investigated the effect of MT as a foliar application at 0, 20, and 40 ppm on tomato plants that were grown in the open field under the long term of optimal and deficit irrigation conditions. The results indicated that exogenous MT significantly enhanced plant growth, chlorophyll and activities of antioxidant enzymes, including ascorbate peroxidase (APX), catalase (CAT), and peroxidase (POX). This improvement was associated with a marked reduction in proline and soluble sugars. In addition, applied-MT worked as a protective agent against oxidative damage by reducing the cellular content of toxic substances such as H2O2 and malondialdehyde (MDA). Similarly, MT-treated plants showed greater total fruit yield with improving its quality attributes like total soluble solids (TSS), ascorbic acid, and lycopene. Generally, the highest significant fruit yield either under well-watered (13.7%) or water deficit (37.4%) conditions was achieved by the treatment of 20 ppm MT. These results indicate that exogenous MT played an essential role in enhancing tomato tolerance to deficit irrigation and could be recommended as a promising agricultural treatment under such conditions.
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Claims 10
Claim · model-written summary
Melatonin significantly enhanced tomato growth and chlorophyll.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- exogenous MTe0
- Outcome
- plant growth, chlorophylle0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicated that exogenous MT significantly enhanced plant growth, chlorophyll and activities of antioxidant enzymes”
t0“Tomato”
Claim · model-written summary
Melatonin significantly enhanced APX, CAT and POX activities.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- exogenous MTe0
- Gene
- ascorbate peroxidase (APX), catalase (CAT), and peroxidase (POX)e0
- Outcome
- activities of antioxidant enzymese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicated that exogenous MT significantly enhanced plant growth, chlorophyll and activities of antioxidant enzymes, including ascorbate peroxidase (APX), catalase (CAT), and peroxidase (POX).”
t0“Tomato”
Claim · model-written summary
The improvement was associated with reduced proline and soluble sugars.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- exogenous MTe1
- Outcome
- proline and soluble sugarse0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This improvement was associated with a marked reduction in proline and soluble sugars.”
e1“exogenous MT significantly enhanced plant growth”
t0“Tomato”
Claim · model-written summary
Applied melatonin reduced cellular H2O2 and MDA content.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- applied-MTe0
- Outcome
- cellular content of toxic substances such as H2O2 and malondialdehyde (MDA)e0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition, applied-MT worked as a protective agent against oxidative damage by reducing the cellular content of toxic substances such as H2O2 and malondialdehyde (MDA).”
t0“Tomato”
Claim · model-written summary
Melatonin protected against oxidative damage by reducing toxic cellular substances.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- applied-MTe0
- Outcome
- protective agent against oxidative damagee0
- Qualifier
- reducing the cellular content of toxic substancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition, applied-MT worked as a protective agent against oxidative damage by reducing the cellular content of toxic substances such as H2O2 and malondialdehyde (MDA).”
t0“Tomato”
Claim · model-written summary
Melatonin-treated plants had greater total fruit yield.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- MT-treatede0
- Outcome
- total fruit yielde0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similarly, MT-treated plants showed greater total fruit yield with improving its quality attributes like total soluble solids (TSS), ascorbic acid, and lycopene.”
t0“Tomato”
Claim · model-written summary
Melatonin improved fruit TSS, ascorbic acid and lycopene quality attributes.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- MT-treatede0
- Outcome
- total soluble solids (TSS), ascorbic acid, and lycopenee0
- Direction
- improvinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similarly, MT-treated plants showed greater total fruit yield with improving its quality attributes like total soluble solids (TSS), ascorbic acid, and lycopene.”
t0“Tomato”
Claim · model-written summary
20 ppm melatonin gave the highest significant yield under well-watered conditions, a 13.7% increase.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 20 ppm MTe0
- Outcome
- fruit yielde0
- Direction
- higheste0
- Value
- 13.7%e0
- Qualifier
- well-waterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Generally, the highest significant fruit yield either under well-watered (13.7%) or water deficit (37.4%) conditions was achieved by the treatment of 20 ppm MT.”
t0“Tomato”
Claim · model-written summary
20 ppm melatonin gave the highest significant yield under water deficit, a 37.4% increase.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 20 ppm MTe0
- Outcome
- fruit yielde0
- Direction
- higheste0
- Value
- 37.4%e0
- Qualifier
- water deficite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Generally, the highest significant fruit yield either under well-watered (13.7%) or water deficit (37.4%) conditions was achieved by the treatment of 20 ppm MT.”
t0“Tomato”
Claim · model-written summary
Exogenous melatonin was recommended as a promising treatment under deficit irrigation.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- exogenous MTe0
- Outcome
- promising agricultural treatmente0
- Qualifier
- deficit irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results indicate that exogenous MT played an essential role in enhancing tomato tolerance to deficit irrigation and could be recommended as a promising agricultural treatment under such conditions.”
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