Abstract
Botrytis cinerea seriously affects the value of post-harvest grapes. Melatonin can act as an exogenous regulator in the resistance of exogenous pathogens due to its antioxidant activity. An artificial inoculation trial was conducted to research the induced resistance mechanism of melatonin treatment using the table grape “Muscat Hamburg” (Vitis vinifera L. cv). Grapes were immersed with 0.02, 0.2, and 2 mmol/L melatonin, followed by B. cinerea suspension injections after 48 h. The results showed that the mycelial growth and spore germination of B. cinerea was not significantly inhibited by melatonin at different concentrations (0.02–2 mmol/L). However, post-harvest melatonin treatment inhibited the increase of disease incidence and severity of grey mould, induced the synthesis and accumulation of total phenols and flavonoids, reduced malondialdehyde generation, and inhibited an increase in cell membrane permeability. Meanwhile, defensive enzyme activities, including superoxide dismutase (SOD), peroxidize (POD), catalase (CAT), phenylalanine ammonia-lyase (PAL), polyphenol oxidase (PPO), chitinase (CHI), and β-1,3-glucanase, were significantly increased in fruits treated with exogenous melatonin. These results suggested that exogenous melatonin treatment could activate defence responses to combat the infection of B. cinerea in post-harvest grapes.
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Claims 8
Claim · model-written summary
Melatonin did not significantly inhibit B. cinerea mycelial growth at 0.02–2 mmol/L.
- Taxon
- Grapest0
- Treatment
- melatonin at different concentrations (0.02–2 mmol/L)e0
- Interactor
- B. cinerea
Botrytis cinereae0pathogen - Outcome
- mycelial growthe0
- Direction
- not significantly inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the mycelial growth and spore germination of B. cinerea was not significantly inhibited by melatonin at different concentrations (0.02–2 mmol/L)”
t0“Post-Harvest Grapes”
Claim · model-written summary
Melatonin did not significantly inhibit B. cinerea spore germination at 0.02–2 mmol/L.
- Taxon
- Grapest0
- Treatment
- melatonin at different concentrations (0.02–2 mmol/L)e0
- Interactor
- B. cinereaBotrytis cinereae0pathogen
- Outcome
- spore germination of B. cinereae0
- Direction
- not significantly inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the mycelial growth and spore germination of B. cinerea was not significantly inhibited by melatonin at different concentrations (0.02–2 mmol/L)”
t0“Post-Harvest Grapes”
Claim · model-written summary
Postharvest melatonin inhibited the increase in grey mould incidence and severity.
- Taxon
- Grapest0
- Treatment
- melatonin treatmente0
- Outcome
- disease incidence and severity of grey moulde0
- Direction
- inhibited the increasee0
Not reportedComparator
Verbatim
e0“post-harvest melatonin treatment inhibited the increase of disease incidence and severity of grey mould”
t0“Post-Harvest Grapes”
Claim · model-written summary
Melatonin induced accumulation of total phenols and flavonoids.
- Taxon
- Grapest0
- Treatment
- melatonin treatmente0
- Outcome
- synthesis and accumulation of total phenols and flavonoidse0
- Direction
- inducede0
Not reportedComparator
Verbatim
e0“post-harvest melatonin treatment inhibited the increase of disease incidence and severity of grey mould, induced the synthesis and accumulation of total phenols and flavonoids”
t0“Post-Harvest Grapes”
Claim · model-written summary
Melatonin reduced malondialdehyde generation.
Not reportedComparator
Verbatim
e0“post-harvest melatonin treatment inhibited the increase of disease incidence and severity of grey mould, induced the synthesis and accumulation of total phenols and flavonoids, reduced malondialdehyde generation”
t0“Post-Harvest Grapes”
Claim · model-written summary
Melatonin inhibited an increase in cell membrane permeability.
- Taxon
- Grapest0
- Treatment
- melatonin treatmente1
- Outcome
- cell membrane permeabilitye0
- Direction
- inhibited an increasee0
Not reportedComparator
Verbatim
e0“inhibited an increase in cell membrane permeability”
e1“post-harvest melatonin treatment inhibited the increase of disease incidence and severity of grey mould”
t0“Post-Harvest Grapes”
Claim · model-written summary
Melatonin significantly increased defensive enzyme activities in fruit.
Not reportedComparator
Verbatim
e0“defensive enzyme activities, including superoxide dismutase (SOD), peroxidize (POD), catalase (CAT), phenylalanine ammonia-lyase (PAL), polyphenol oxidase (PPO), chitinase (CHI), and β-1,3-glucanase, were significantly increased in fruits treated with exogenous melatonin”
t0“Post-Harvest Grapes”
Claim · model-written summary
The authors infer that melatonin activates defence responses against B. cinerea infection.
- Taxon
- grapese0
- Treatment
- exogenous melatonin treatmente0
- Interactor
- B. cinereaBotrytis cinereae0pathogen
- Outcome
- defence responses to combat the infection of B. cinereae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous melatonin treatment could activate defence responses to combat the infection of B. cinerea in post-harvest grapes”
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