Abstract
Three basil plant varieties (Ocimum basilicum var. Genovese, Ocimum × citriodorum, and Ocimum basilicum var. purpurascens) were grown under moderate light (about 300 µmol photons m−2 s−1) in a glasshouse or growth chamber and then either transferred to an open field (average daily dose: 29.2 kJ m−2 d−1) or additionally exposed to UV-B irradiation in a growth chamber (29.16 kJ m−2 d−1), to reveal the variety-specific and light-specific acclimation responses. Total antioxidant capacity (TAC), phenolic profile, ascorbate content, and class III peroxidase (POD) activity were used to determine the antioxidant status of leaves under all four light regimes. Exposure to high solar irradiation at the open field resulted in an increase in TAC, total hydroxycinnamic acids (HCAs, especially caffeic acid), flavonoids, and epidermal UV-absorbing substances in all three varieties, as well as a two-fold increase in the leaf dry/fresh weight ratio. The supplemental UV-B irradiation induced preferential accumulation of HCAs (rosmarinic acid) over flavonoids, increased TAC and POD activity, but decreased the ascorbate content in the leaves, and inhibited the accumulation of epidermal flavonoids in all basil varieties. Furthermore, characteristic leaf curling and UV-B-induced inhibition of plant growth were observed in all basil varieties, while a pro-oxidant effect of UV-B was indicated with H2O2 accumulation in the leaves and spotty leaf browning. The extent of these morphological changes, and oxidative damage depended on the basil cultivar, implies a genotype-specific tolerance mechanism to high doses of UV-B irradiation.
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Claims 12
Claim · model-written summary
Open-field high solar irradiation increased total antioxidant capacity, total hydroxycinnamic acids and flavonoids in basil leaves relative to moderate light.
- Taxon
- basil
Ocimum basilicume0 - Treatment
- Exposure to high solar irradiation at the open fielde2
- Outcome
- TAC, total hydroxycinnamic acids (HCAs, especially caffeic acid), flavonoidse2
- Direction
- increasee2
- Comparator
- moderate lighte1
- Setting
- open fielde2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e1“were grown under moderate light”
e2“Exposure to high solar irradiation at the open field resulted in an increase in TAC, total hydroxycinnamic acids (HCAs, especially caffeic acid), flavonoids, and epidermal UV-absorbing substances in all three varieties, as well as a two-fold increase in the leaf dry/fresh weight ratio”
Claim · model-written summary
Open-field high solar irradiation increased epidermal UV-absorbing substances in basil leaves relative to moderate light.
- Taxon
- basilOcimum basilicume0
- Treatment
- Exposure to high solar irradiation at the open fielde2
- Outcome
- epidermal UV-absorbing substancese2
- Direction
- increasee2
- Comparator
- moderate lighte1
- Setting
- open fielde2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e1“were grown under moderate light”
e2“Exposure to high solar irradiation at the open field resulted in an increase in TAC, total hydroxycinnamic acids (HCAs, especially caffeic acid), flavonoids, and epidermal UV-absorbing substances in all three varieties, as well as a two-fold increase in the leaf dry/fresh weight ratio”
Claim · model-written summary
Open-field high solar irradiation increased the leaf dry/fresh weight ratio about two-fold in basil relative to moderate light.
- Taxon
- basilOcimum basilicume0
- Treatment
- Exposure to high solar irradiation at the open fielde2
- Outcome
- leaf dry/fresh weight ratioe2
- Direction
- increasee2
- Value
- two-folde2
- Comparator
- moderate lighte1
- Setting
- open fielde2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e1“were grown under moderate light”
e2“Exposure to high solar irradiation at the open field resulted in an increase in TAC, total hydroxycinnamic acids (HCAs, especially caffeic acid), flavonoids, and epidermal UV-absorbing substances in all three varieties, as well as a two-fold increase in the leaf dry/fresh weight ratio”
Claim · model-written summary
Supplemental UV-B irradiation induced preferential accumulation of HCAs (rosmarinic acid) over flavonoids in basil leaves.
- Taxon
- basilOcimum basilicume0
- Treatment
- supplemental UV-B irradiatione3
- Outcome
- accumulation of HCAs (rosmarinic acid) over flavonoidse3
- Direction
- preferentiale3
- Comparator
- flavonoidse3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e3“The supplemental UV-B irradiation induced preferential accumulation of HCAs (rosmarinic acid) over flavonoids, increased TAC and POD activity, but decreased the ascorbate content in the leaves, and inhibited the accumulation of epidermal flavonoids in all basil varieties”
Claim · model-written summary
Supplemental UV-B irradiation increased TAC and POD activity in basil leaves.
- Taxon
- basilOcimum basilicume0
- Treatment
- supplemental UV-B irradiatione3
- Outcome
- TAC and POD activitye3
- Direction
- increasede3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e3“The supplemental UV-B irradiation induced preferential accumulation of HCAs (rosmarinic acid) over flavonoids, increased TAC and POD activity, but decreased the ascorbate content in the leaves, and inhibited the accumulation of epidermal flavonoids in all basil varieties”
Claim · model-written summary
Supplemental UV-B irradiation decreased the ascorbate content in basil leaves.
- Taxon
- basilOcimum basilicume0
- Treatment
- supplemental UV-B irradiatione3
- Outcome
- ascorbate contente3
- Direction
- decreasede3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e3“The supplemental UV-B irradiation induced preferential accumulation of HCAs (rosmarinic acid) over flavonoids, increased TAC and POD activity, but decreased the ascorbate content in the leaves, and inhibited the accumulation of epidermal flavonoids in all basil varieties”
Claim · model-written summary
Supplemental UV-B irradiation inhibited the accumulation of epidermal flavonoids in all basil varieties.
- Taxon
- basilOcimum basilicume0
- Treatment
- supplemental UV-B irradiatione3
- Outcome
- accumulation of epidermal flavonoidse3
- Direction
- inhibitede3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e3“The supplemental UV-B irradiation induced preferential accumulation of HCAs (rosmarinic acid) over flavonoids, increased TAC and POD activity, but decreased the ascorbate content in the leaves, and inhibited the accumulation of epidermal flavonoids in all basil varieties”
Claim · model-written summary
UV-B irradiation caused characteristic leaf curling in basil varieties.
- Taxon
- basilOcimum basilicume0
- Treatment
- UV-Be5
- Outcome
- characteristic leaf curlinge5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e5“characteristic leaf curling and UV-B-induced inhibition of plant growth were observed in all basil varieties, while a pro-oxidant effect of UV-B was indicated with H2O2 accumulation in the leaves and spotty leaf browning”
Claim · model-written summary
UV-B irradiation inhibited plant growth in basil varieties.
- Taxon
- basilOcimum basilicume0
- Treatment
- UV-Be5
- Outcome
- plant growthe5
- Direction
- inhibitione5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e5“characteristic leaf curling and UV-B-induced inhibition of plant growth were observed in all basil varieties, while a pro-oxidant effect of UV-B was indicated with H2O2 accumulation in the leaves and spotty leaf browning”
Claim · model-written summary
UV-B irradiation was associated with H2O2 accumulation in the leaves of basil, indicating a pro-oxidant effect.
- Taxon
- basilOcimum basilicume0
- Treatment
- UV-Be5
- Outcome
- H2O2 accumulation in the leavese5
- Direction
- accumulatione5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e5“characteristic leaf curling and UV-B-induced inhibition of plant growth were observed in all basil varieties, while a pro-oxidant effect of UV-B was indicated with H2O2 accumulation in the leaves and spotty leaf browning”
Claim · model-written summary
UV-B irradiation caused spotty leaf browning in basil varieties.
- Taxon
- basilOcimum basilicume0
- Treatment
- UV-Be5
- Outcome
- spotty leaf browninge5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e5“characteristic leaf curling and UV-B-induced inhibition of plant growth were observed in all basil varieties, while a pro-oxidant effect of UV-B was indicated with H2O2 accumulation in the leaves and spotty leaf browning”
Claim · model-written summary
The extent of morphological changes and oxidative damage under high-dose UV-B depended on the basil cultivar.
- Taxon
- basilOcimum basilicume0
- Material
- basil cultivare4
- Outcome
- extent of these morphological changes, and oxidative damagee4
- Qualifier
- genotype-specific tolerance mechanisme4
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three basil plant varieties”
e4“The extent of these morphological changes, and oxidative damage depended on the basil cultivar, implies a genotype-specific tolerance mechanism to high doses of UV-B irradiation”
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