Abstract
Abstract Dichlormid, a safener for thiolcarbamate herbicides, was tank-mixed with several herbicidal inhibitors of photosystem II, or with the herbicide acifluorfen, and applied postemergence to Ipomoea hederacea plants. Dichlormid had no visible effects on the plants when applied alone, but interacted synergistically with the herbicides in the combination treatments. Dichlormid strongly decreased the ascorbic acid levels in the Ipomoea hederacea cotyledons. Ascorbate is known to protect plant tissue from photooxidative damage. The herbicides which interacted synergistically with dichlormid are believed to generate their phytotoxic action via the production of excess singlet oxygen. It is suggested that the decreased ascorbate levels in the Ipomoea hederacea cotyledons after dichlormid treatment result in an impaired singlet oxygen scavenging system and consequently lead to increased plant damage in the presence of singlet oxygen generating herbicides.
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Claims 4
Claim · model-written summary
Dichlormid alone had no visible effects.
- Taxon
- Ipomoea hederacea
Ipomoea hederaceat0 - Treatment
- Dichlormide0
- Outcome
- visible effectse0
- Direction
- no visible effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dichlormid had no visible effects on the plants when applied alone”
t0“Ipomoea hederacea plants”
Claim · model-written summary
Dichlormid acted synergistically with the tested herbicides.
- Taxon
- Ipomoea hederaceaIpomoea hederaceat0
- Treatment
- Dichlormide0
- Outcome
- interacted synergisticallye0
- Direction
- synergisticallye0
- Comparator
- applied alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dichlormid had no visible effects on the plants when applied alone, but interacted synergistically with the herbicides in the combination treatments.”
t0“Ipomoea hederacea plants”
Claim · model-written summary
Dichlormid strongly decreased cotyledon ascorbic acid.
- Taxon
- Ipomoea hederaceaIpomoea hederaceae0
- Organ / stage
- cotyledonse0
- Treatment
- Dichlormide0
- Outcome
- ascorbic acid levelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dichlormid strongly decreased the ascorbic acid levels in the Ipomoea hederacea cotyledons.”
Claim · model-written summary
The authors suggest that decreased ascorbate impairs singlet oxygen scavenging and increases herbicide damage.
- Taxon
- Ipomoea hederaceaIpomoea hederaceae0
- Compound
- ascorbatee0
- Outcome
- increased plant damagee0
- Qualifier
- impaired singlet oxygen scavenging systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that the decreased ascorbate levels in the Ipomoea hederacea cotyledons after dichlormid treatment result in an impaired singlet oxygen scavenging system and consequently lead to increased plant damage in the presence of singlet oxygen generating herbicides.”