Abstract
The mode of action of the furanone herbicide flurtamone and derivatives was investigated with cress seedlings and with the unicellular cyanobacterium Anacystis. Either in the light or in the dark these compounds inhibited the formation of alpha- and beta-carotene and all of the xanthophylls in the seedlings. Instead, phytoene, a precursor of colored carotenoids, was accumulated. In illuminated seedlings photooxidative destruction of chlorophyll was observed. The I(50) value of flurtamone inhibition of carotenoid biosynthesis in intact Anacystis cells and the K(1) value for interaction of flurtamone with phytoene desaturase with Anacystis thylakoids were 30 and 18 nanomoles, respectively. Concentrations of flurtamone which strongly inhibited carotenoid synthesis had no direct peroxidative activities and did not inhibit photosynthetic electron transport.
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Claims 8
Claim · model-written summary
Flurtamone and derivatives inhibited alpha-carotene and beta-carotene formation in cress seedlings in light and dark.
- Taxon
- seedlingse0
- Treatment
- these compoundse0
- Outcome
- formation of alpha- and beta-carotenee0
- Direction
- inhibitede0
- Qualifier
- Either in the light or in the darke0
Not reportedComparator
Verbatim
e0“Either in the light or in the dark these compounds inhibited the formation of alpha- and beta-carotene and all of the xanthophylls in the seedlings.”
Claim · model-written summary
Flurtamone and derivatives inhibited xanthophyll formation in cress seedlings in light and dark.
Not reportedComparator
Verbatim
e0“Either in the light or in the dark these compounds inhibited the formation of alpha- and beta-carotene and all of the xanthophylls in the seedlings.”
t0“Flurtamone”
Claim · model-written summary
Phytoene accumulated in treated seedlings.
Not reportedTaxon
Verbatim
e0“Instead, phytoene, a precursor of colored carotenoids, was accumulated.”
Claim · model-written summary
Illuminated treated seedlings showed photooxidative chlorophyll destruction.
Verbatim
e0“In illuminated seedlings photooxidative destruction of chlorophyll was observed.”
Claim · model-written summary
Flurtamone inhibited carotenoid biosynthesis in intact Anacystis cells with an I(50) of 30 nanomoles.
- Taxon
- Anacystis
Synechococcuse0 - Outcome
- flurtamone inhibition of carotenoid biosynthesise0
- Value
- 30e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The I(50) value of flurtamone inhibition of carotenoid biosynthesis in intact Anacystis cells and the K(1) value for interaction of flurtamone with phytoene desaturase with Anacystis thylakoids were 30 and 18 nanomoles, respectively.”
Claim · model-written summary
Flurtamone interacted with phytoene desaturase in Anacystis thylakoids with a K(1) of 18 nanomoles.
- Taxon
- AnacystisSynechococcuse0
- Gene
- phytoene desaturasee0
- Outcome
- interaction of flurtamone with phytoene desaturasee0
- Value
- 18 nanomolese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The I(50) value of flurtamone inhibition of carotenoid biosynthesis in intact Anacystis cells and the K(1) value for interaction of flurtamone with phytoene desaturase with Anacystis thylakoids were 30 and 18 nanomoles, respectively.”
Claim · model-written summary
Flurtamone concentrations that inhibited carotenoid synthesis had no direct peroxidative activity.
Not reportedTaxon
Verbatim
e0“Concentrations of flurtamone which strongly inhibited carotenoid synthesis had no direct peroxidative activities”
Claim · model-written summary
Flurtamone concentrations that inhibited carotenoid synthesis did not inhibit photosynthetic electron transport.
Not reportedTaxon
Verbatim
e0“Concentrations of flurtamone which strongly inhibited carotenoid synthesis had no direct peroxidative activities and did not inhibit photosynthetic electron transport.”