Abstract
Plants have evolved mechanisms to avoid and repair UV radiation damage; it is not surprising that photomorphogenic responses to UV-B and UV-C are often assumed to be adaptations to harmful radiation. Free radicals generated by UV are likely to be involved in the induction of antioxidant defence system. In this study plants were grown for 5 weeks in controlled conditions. Plants were grown in vermiculite medium before applying the UV treatments, and irrigated daily by Hoagland solution for 5 weeks. After 5 weeks, plants were exposed to UV-A (320-390 nm), UV-B (312 nm), and UV-C (254 nm) irradiation with a density of 6.1 (Wm-2), 5.8 (Wm-2) and 5.7 (Wm-2) for 2 weeks. Each plant was exposed to UV in their light period for 27 min per day for 14 days. In each experiment 4 replicates were used. Data were analyzed using SPSS software, and averages were compared by Duncan´s test. Activity of antioxidant enzymes could be found in the plant antioxidant defence system. The activity of antioxidant enzymes (namely, peroxidase, polyphenol oxidase, ascorbate peroxidase, catalase, and glutathione reductase) enhanced in leaves and roots of pepper plants in response to UV-B and UV-C radiation. The increase in the activity of antioxidant enzymes could minimise the effects of ultraviolet radiation. UV treatments induced significant increase in ascorbic acid in leaf and root of exposed plants. The present study was conducted to determine the role of antioxidant defence mechanism in UV-A, UV-B and UV-C treated plants of Capsicum annuum L.
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Claims 3
Claim · model-written summary
UV-B enhanced antioxidant enzyme activity in pepper leaves and roots.
- Taxon
- Capsicum annuum L.
Capsicum annuumt0 - Organ / stage
- leaves and rootse0
- Treatment
- UV-Be0
- Outcome
- activity of antioxidant enzymese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum L.”
e0“The activity of antioxidant enzymes (namely, peroxidase, polyphenol oxidase, ascorbate peroxidase, catalase, and glutathione reductase) enhanced in leaves and roots of pepper plants in response to UV-B and UV-C radiation.”
Claim · model-written summary
UV-C enhanced antioxidant enzyme activity in pepper leaves and roots.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Organ / stage
- leaves and rootse0
- Treatment
- UV-Ce0
- Outcome
- activity of antioxidant enzymese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum L.”
e0“The activity of antioxidant enzymes (namely, peroxidase, polyphenol oxidase, ascorbate peroxidase, catalase, and glutathione reductase) enhanced in leaves and roots of pepper plants in response to UV-B and UV-C radiation.”
Claim · model-written summary
UV treatments significantly increased ascorbic acid in pepper leaves and roots.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Organ / stage
- leaf and roote0
- Treatment
- UV treatmentse0
- Outcome
- ascorbic acide0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum L.”
e0“UV treatments induced significant increase in ascorbic acid in leaf and root of exposed plants.”
The same questions in other papers
uv · quality: phytochemicals · Capsicum annuum (sweet pepper)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →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.