Abstract
Leaf senescence is a developmentally programmed and degenerative process which comprises the last stage of the life cycle of leaves. In order to understand the melatonin effect on grapevine leaf senescence, the dark treatment on detached leaves of Vitis vinifera L. cv. Red Globe was performed to induce leaf senescence at short period of time. Then, a series of physiological and molecular changes in response to exogenous melatonin were measured. Results showed that 100 μM of melatonin treatment could significantly delay the dark induced leaf senescence, which is accompanied by the decreased production of reactive oxygen species (ROS). Meanwhile, melatonin treatment could increase the scavenging activity of antioxidant enzymes, such as peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT). Simultaneously, ascorbate (AsA) and glutathione (GSH) contents, the activities of ascorbate peroxidase (APX), and glutathione reductase (GR) were significantly higher than control treatment in samples treated with melatonin. Furthermore, melatonin treatment showed to suppress the expression of leaf senescence-associated genes (SAGs). All these results demonstrated that melatonin could activate the antioxidant and Ascorbate-Glutathione (AsA-GSH) cycle system and repress the expression of SAGs that lead to delay the dark induced grape leaf senescence.
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Claims 7
Claim · model-written summary
Melatonin significantly delayed dark-induced leaf senescence.
- Taxon
- Vitis vinifera L.
Vitis viniferat0 - Organ / stage
- leafe0
- Treatment
- 100 μM of melatonin treatmente0
- Outcome
- dark induced leaf senescencee0
- Direction
- delaye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100 μM of melatonin treatment could significantly delay the dark induced leaf senescence”
t0“Vitis vinifera L. cv. Red Globe”
Claim · model-written summary
Melatonin treatment decreased reactive oxygen species production.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- melatonin treatmente1
- Outcome
- production of reactive oxygen species (ROS)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which is accompanied by the decreased production of reactive oxygen species (ROS)”
t0“Vitis vinifera L. cv. Red Globe”
e1“melatonin treatment could increase the scavenging activity”
Claim · model-written summary
Melatonin increased scavenging activity of POD, SOD, and CAT.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- melatonin treatmente0
- Gene
- peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT)e0
- Outcome
- scavenging activity of antioxidant enzymese0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“melatonin treatment could increase the scavenging activity of antioxidant enzymes, such as peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT).”
t0“Vitis vinifera L. cv. Red Globe”
Claim · model-written summary
Melatonin raised ascorbate and glutathione contents relative to control.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- melatonine0
- Outcome
- ascorbate (AsA) and glutathione (GSH) contentse0
- Direction
- highere0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ascorbate (AsA) and glutathione (GSH) contents, the activities of ascorbate peroxidase (APX), and glutathione reductase (GR) were significantly higher than control treatment in samples treated with melatonin.”
t0“Vitis vinifera L. cv. Red Globe”
Claim · model-written summary
Melatonin raised APX and GR activities relative to control.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- melatonine0
- Outcome
- activities of ascorbate peroxidase (APX), and glutathione reductase (GR)e0
- Direction
- highere0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of ascorbate peroxidase (APX), and glutathione reductase (GR) were significantly higher than control treatment in samples treated with melatonin.”
t0“Vitis vinifera L. cv. Red Globe”
Claim · model-written summary
Melatonin suppressed expression of senescence-associated genes.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- melatonin treatmente0
- Gene
- leaf senescence-associated genes (SAGs)e0
- Outcome
- expression of leaf senescence-associated genes (SAGs)e0
- Direction
- suppresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“melatonin treatment showed to suppress the expression of leaf senescence-associated genes (SAGs).”
t0“Vitis vinifera L. cv. Red Globe”
Claim · model-written summary
The authors attributed delayed senescence to antioxidant and AsA-GSH cycle activation and SAG repression.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- melatonine0
- Outcome
- delay the dark induced grape leaf senescencee0
- Qualifier
- antioxidant and Ascorbate-Glutathione (AsA-GSH) cycle systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“melatonin could activate the antioxidant and Ascorbate-Glutathione (AsA-GSH) cycle system and repress the expression of SAGs that lead to delay the dark induced grape leaf senescence.”
t0“Vitis vinifera L. cv. Red Globe”
The same questions in other papers
melatonin · physiology: antioxidant enzymes · Vitis vinifera (wine grape)Results differ
1 paper in the same direction as this paper
- positive
melatonin · molecular: metabolites · Vitis vinifera (wine grape)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.