Abstract
The lipid-soluble antioxidants alpha-tocopherol and carnosic acid were studied in field-grown rosemary (Rosmarinus officinalis L.) plants subjected to drought. During summer in the Mediterranean region, the predawn water potential decreased to -3 MPa and the relative water content to 42%, which caused a depletion of the maximum diurnal CO(2) assimilation rate by 80%. Meanwhile, the maximum efficiency of photosystem II photochemistry and the chlorophyll content of leaves remained unaltered, indicative of the absence of photooxidative damage. The concentration of alpha-tocopherol increased by 15-fold and that of carotenoids by approximately 26% in response to water stress. Enhanced formation of the highly oxidized abietane diterpenes isorosmanol (by 25%) and dimethyl isorosmanol (by 40%) was observed during the summer as result of the oxidation of carnosic acid, which decreased by 22%. The large amounts of carnosic acid, alpha-tocopherol, and carotenoids present in rosemary leaves might contribute to the prevention of oxidative damage in plants exposed to drought.
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Claims 10
Claim · model-written summary
During summer, predawn water potential fell to -3 MPa.
- Taxon
- rosemary
Salvia rosmarinust0 - Outcome
- predawn water potentiale0
- Direction
- decreasede0
- Value
- -3 MPae0
- Setting
- Mediterranean regione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the predawn water potential decreased to -3 MPa”
t0“Rosemary”
e1“During summer in the Mediterranean region”
Claim · model-written summary
Relative water content fell to 42%.
- Taxon
- rosemarySalvia rosmarinust0
- Outcome
- relative water contente0
- Value
- 42%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative water content to 42%”
t0“Rosemary”
Claim · model-written summary
Maximum diurnal CO2 assimilation fell by 80% during summer drought.
- Taxon
- rosemarySalvia rosmarinust0
- Treatment
- droughte1
- Outcome
- maximum diurnal CO(2) assimilation ratee0
- Direction
- depletione0
- Value
- 80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which caused a depletion of the maximum diurnal CO(2) assimilation rate by 80%”
t0“Rosemary”
e1“plants subjected to drought”
Claim · model-written summary
Maximum photosystem II efficiency and leaf chlorophyll content remained unaltered.
- Taxon
- rosemarySalvia rosmarinust0
- Outcome
- maximum efficiency of photosystem II photochemistry and the chlorophyll content of leavese0
- Direction
- remained unalterede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum efficiency of photosystem II photochemistry and the chlorophyll content of leaves remained unaltered”
t0“Rosemary”
Claim · model-written summary
Alpha-tocopherol concentration increased 15-fold under water stress.
- Taxon
- rosemarySalvia rosmarinust0
- Treatment
- water stresse0
- Outcome
- concentration of alpha-tocopherole0
- Direction
- increasede0
- Value
- 15-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of alpha-tocopherol increased by 15-fold and that of carotenoids by approximately 26% in response to water stress.”
t0“Rosemary”
Claim · model-written summary
Carotenoid concentration increased approximately 26% under water stress.
- Taxon
- rosemarySalvia rosmarinust0
- Treatment
- water stresse0
- Outcome
- carotenoidse0
- Value
- approximately 26%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that of carotenoids by approximately 26% in response to water stress”
t0“Rosemary”
Claim · model-written summary
Isorosmanol formation increased 25% during summer.
- Taxon
- rosemarySalvia rosmarinust0
- Outcome
- formation of the highly oxidized abietane diterpenes isorosmanole0
- Direction
- Enhancede0
- Value
- 25%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enhanced formation of the highly oxidized abietane diterpenes isorosmanol (by 25%)”
t0“Rosemary”
Claim · model-written summary
Dimethyl isorosmanol formation increased 40% during summer.
- Taxon
- rosemarySalvia rosmarinust0
- Outcome
- dimethyl isorosmanole0
- Value
- 40%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dimethyl isorosmanol (by 40%) was observed during the summer”
t0“Rosemary”
Claim · model-written summary
Carnosic acid decreased 22%.
- Taxon
- rosemarySalvia rosmarinust0
- Outcome
- carnosic acide0
- Direction
- decreasede0
- Value
- 22%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carnosic acid, which decreased by 22%”
t0“Rosemary”
Claim · model-written summary
The authors suggest leaf antioxidants may prevent drought oxidative damage.
- Taxon
- rosemarySalvia rosmarinuse0
- Compound
- carnosic acid, alpha-tocopherol, and carotenoidse0
- Outcome
- prevention of oxidative damagee0
- Qualifier
- might contributee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The large amounts of carnosic acid, alpha-tocopherol, and carotenoids present in rosemary leaves might contribute to the prevention of oxidative damage in plants exposed to drought.”
The same questions in other papers
drought · molecular: metabolites · Salvia rosmarinus (rosemary)Positive and negative results
1 in the opposite direction
- no effect
drought · physiology: pigments · Salvia rosmarinus (rosemary)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
drought · physiology: photosynthesis · Salvia rosmarinus (rosemary)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.