Abstract
Hydrogen sulfide (H 2 S) has been shown to be a gaseous molecule in the regulation of many processes in plants such as abiotic stress tolerance, root organogenesis, stomatal movement, and postharvest fruit senescence. We studied the role of H 2 S in the regulation of senescence and fungal decay in fresh-cut sweetpotato ( Ipomoea batatas L., cv. Xushu 18) roots. H 2 S donor sodium hydrosulfide (NaHS) alleviated senescence in fresh-cut sweetpotato root tissue in a dose-dependent manner with the optimal concentration of 2.0 mmol·L −1 NaHS solution. At the optimal concentration of 2.0 mmol·L −1 NaHS, H 2 S fumigation maintained higher levels of reducing sugar in sweetpotato fresh-cut root. H 2 S treatment also significantly increased the activities of guaiacol peroxidase (POD) and decreased those of polyphenol oxidase (PPO) in sweetpotato during storage. Further investigation showed that H 2 S treatment maintained a lower level of lipoxygenase (LOX) activity compared with water control. Consistently, the accumulation of malondialdehyde (MDA) was reduced in H 2 S-treated groups. Three fungal pathogens, Rhizopus nigricans , Mucor rouxianus, and Geotrichum candidum , were isolated from sweetpotato tissue infected with black rot or soft rot. H 2 S fumigation at 1 to 2.5 mmol·L −1 NaHS resulted in effective inhibition of the three fungi when grown on medium. When the three fungi were inoculated on the surface of sweetpotato slices, H 2 S fumigation greatly reduced the percentage of fungal infection. In conclusion, these data suggest that H 2 S effectively alleviated the senescence and decay in sweetpotato slices and might be developed into a novel fungicide for reduction of black rot or soft rot in sweetpotato.
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Claims 10
Claim · model-written summary
NaHS alleviated senescence in fresh-cut sweetpotato root tissue dose-dependently, optimally at 2.0 mmol·L −1.
- Taxon
- sweetpotato
_Flower.jpg?width=60)
Ipomoea batatase0 - Organ / stage
- root tissuee0
- Treatment
- sodium hydrosulfide (NaHS)e0
- Outcome
- senescencee0
- Direction
- alleviatede0
- Value
- 2.0 mmol·L −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“H 2 S donor sodium hydrosulfide (NaHS) alleviated senescence in fresh-cut sweetpotato root tissue in a dose-dependent manner with the optimal concentration of 2.0 mmol·L −1 NaHS solution”
Claim · model-written summary
H2S fumigation maintained higher reducing sugar levels in sweetpotato fresh-cut root.
- Taxon
- sweetpotatoIpomoea batatase0
- Organ / stage
- fresh-cut roote0
- Treatment
- H 2 S fumigatione0
- Outcome
- levels of reducing sugare0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the optimal concentration of 2.0 mmol·L −1 NaHS, H 2 S fumigation maintained higher levels of reducing sugar in sweetpotato fresh-cut root”
Claim · model-written summary
H2S increased guaiacol peroxidase activity during sweetpotato storage.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- H 2 S treatmente0
- Gene
- guaiacol peroxidase (POD)e0
- Outcome
- activities of guaiacol peroxidase (POD)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H 2 S treatment also significantly increased the activities of guaiacol peroxidase (POD) and decreased those of polyphenol oxidase (PPO) in sweetpotato during storage”
Claim · model-written summary
H2S decreased polyphenol oxidase activity during sweetpotato storage.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- H 2 S treatmente0
- Gene
- polyphenol oxidase (PPO)e0
- Outcome
- polyphenol oxidase (PPO)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H 2 S treatment also significantly increased the activities of guaiacol peroxidase (POD) and decreased those of polyphenol oxidase (PPO) in sweetpotato during storage”
Claim · model-written summary
H2S maintained lower lipoxygenase activity than water control.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- H 2 S treatmente0
- Gene
- lipoxygenase (LOX)e0
- Outcome
- lipoxygenase (LOX) activitye0
- Direction
- lowere0
- Comparator
- water controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H 2 S treatment maintained a lower level of lipoxygenase (LOX) activity compared with water control”
t0“Sweetpotato”
Claim · model-written summary
H2S reduced malondialdehyde accumulation.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- H 2 S-treated groupse0
- Outcome
- accumulation of malondialdehyde (MDA)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the accumulation of malondialdehyde (MDA) was reduced in H 2 S-treated groups”
t0“Sweetpotato”
Claim · model-written summary
Three fungal pathogens were isolated from sweetpotato tissue with black or soft rot.
- Taxon
- sweetpotatoIpomoea batatase0
- Interactor
- Rhizopus nigricans
Rhizopus stolonifere0pathogen - Second interactor
- Mucor rouxianus
Mucor rouxianuse0pathogen - Outcome
- were isolated from sweetpotato tissue infected with black rot or soft rote0
- Qualifier
- Geotrichum candidume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three fungal pathogens, Rhizopus nigricans , Mucor rouxianus, and Geotrichum candidum , were isolated from sweetpotato tissue infected with black rot or soft rot”
Claim · model-written summary
H2S fumigation inhibited growth of the three isolated fungi on medium.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- H 2 S fumigation at 1 to 2.5 mmol·L −1 NaHSe0
- Outcome
- inhibition of the three fungie0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H 2 S fumigation at 1 to 2.5 mmol·L −1 NaHS resulted in effective inhibition of the three fungi when grown on medium”
t0“Sweetpotato”
Claim · model-written summary
H2S fumigation greatly reduced fungal infection of inoculated sweetpotato slices.
- Taxon
- sweetpotatoIpomoea batatase0
- Organ / stage
- sweetpotato slicese0
- Treatment
- H 2 S fumigatione0
- Outcome
- percentage of fungal infectione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the three fungi were inoculated on the surface of sweetpotato slices, H 2 S fumigation greatly reduced the percentage of fungal infection”
Claim · model-written summary
The authors propose H2S as a fungicide for reducing sweetpotato black or soft rot.
- Taxon
- sweetpotatoIpomoea batatase0
- Outcome
- developed into a novel fungicide for reduction of black rot or soft rote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“might be developed into a novel fungicide for reduction of black rot or soft rot in sweetpotato”
The same questions in other papers
solarization · disease · Ipomoea batatas (sweet potato)Results agree
1 paper in the same direction as this paper
- 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.