Abstract
The effects of ultraviolet B (UV-B, 280–315 nm) on phenolic acids content, key enzymes activity and antioxidant capacity as well as the related gene expressions of barley seedlings were investigated in the present study. Results showed that UV-B treatment increased phenolics content including vanillic acid, p-coumaric acid, ferulic acid and erucic acid in barley seedlings, significantly. The mRNA levels and activities of phenylalanine ammonia lyase (PAL), cinnamic acid 4-hydroxylase (C4H), 4-coumarate coenzyme A ligase (4CL), p-coumaric acid 3-hdroxylase (C3H), caffeic acid O-methyltransferase (COMT) and ferulic acid 5-hydroxylase (F5H) involved in phenolic acid synthesis increased under UV-B treatment as well. In addition, UV-B radiation enhanced the antioxidant enzymes activity and the gene expressions of barley seedlings, including superoxide dismutase (SOD), peroxidase (POD) and glutathione reductase (GR), and improved 2,2-diazo-bis (3-ethyl-benzothiazole-6-sulfonic acid) diammonium salt (ABTS) and 1,1-diphenyl-2-trinitrophenylhydrazine (DPPH) free radical scavenging ability. In conclusion, UV-B treatment led to the upper-regulation of related enzymes activity and gene expression, resulting in the accumulation of phenolic acids in barley seedlings, thus contributing to the enhancement of antioxidant system.
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Claims 6
Claim · model-written summary
UV-B increased vanillic acid and p-coumaric acid content.
- Taxon
- barley seedlings
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- UV-B treatmente0
- Outcome
- phenolics content including vanillic acid, p-coumaric acide0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“UV-B treatment increased phenolics content including vanillic acid, p-coumaric acid, ferulic acid and erucic acid in barley seedlings, significantly”
Claim · model-written summary
UV-B increased ferulic acid and erucic acid content.
- Taxon
- barley seedlingsHordeum vulgaree0
- Treatment
- UV-B treatmente0
- Outcome
- ferulic acid and erucic acide0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-B treatment increased phenolics content including vanillic acid, p-coumaric acid, ferulic acid and erucic acid in barley seedlings, significantly”
Claim · model-written summary
UV-B increased mRNA levels of phenolic acid synthesis enzymes.
- Taxon
- barley seedlingsHordeum vulgaret0
- Treatment
- UV-B treatmente0
- Outcome
- mRNA levelse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mRNA levels and activities of phenylalanine ammonia lyase (PAL), cinnamic acid 4-hydroxylase (C4H), 4-coumarate coenzyme A ligase (4CL), p-coumaric acid 3-hdroxylase (C3H), caffeic acid O-methyltransferase (COMT) and ferulic acid 5-hydroxylase (F5H) involved in phenolic acid synthesis increased under UV-B treatment as well”
t0“barley seedlings”
Claim · model-written summary
UV-B increased activities of phenolic acid synthesis enzymes.
- Taxon
- barley seedlingsHordeum vulgaret0
- Treatment
- UV-B treatmente0
- Outcome
- activities of phenylalanine ammonia lyase (PAL), cinnamic acid 4-hydroxylase (C4H), 4-coumarate coenzyme A ligase (4CL)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mRNA levels and activities of phenylalanine ammonia lyase (PAL), cinnamic acid 4-hydroxylase (C4H), 4-coumarate coenzyme A ligase (4CL), p-coumaric acid 3-hdroxylase (C3H), caffeic acid O-methyltransferase (COMT) and ferulic acid 5-hydroxylase (F5H) involved in phenolic acid synthesis increased under UV-B treatment as well”
t0“barley seedlings”
Claim · model-written summary
UV-B enhanced antioxidant enzyme activity and gene expression.
- Taxon
- barley seedlingsHordeum vulgaree0
- Treatment
- UV-B radiatione0
- Outcome
- antioxidant enzymes activity and the gene expressionse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-B radiation enhanced the antioxidant enzymes activity and the gene expressions of barley seedlings, including superoxide dismutase (SOD), peroxidase (POD) and glutathione reductase (GR)”
Claim · model-written summary
UV-B improved ABTS and DPPH radical scavenging ability.
- Taxon
- barley seedlingsHordeum vulgaret0
- Treatment
- UV-Bt0
- Outcome
- free radical scavenging abilitye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improved 2,2-diazo-bis (3-ethyl-benzothiazole-6-sulfonic acid) diammonium salt (ABTS) and 1,1-diphenyl-2-trinitrophenylhydrazine (DPPH) free radical scavenging ability”
t0“UV-B treatment enhances phenolic acids accumulation and antioxidant capacity of barley seedlings”
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uv · quality: phytochemicals · Hordeum vulgare (barley)Results agree
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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.