Abstract
In wheat seedlings (Triticum aestivum L. cv. 2329) oxidative stress caused by UV-B radiation led to lipid peroxidation of thylakoid membrane; it was expressed in term of malondialdehyde (MDA) formation. The peroxidation of lipids of thylakoid membrane in isolated chloroplasts was prevented when flavonoids quercetin and rutin were supplied into the incubation medium. The activities of superoxide dismutase, ascorbate peroxidase, and catalase increased during the first hours of UV-B exposure. A comparative study of UV-B and temperature effects showed different profiles of the antioxidant enzymes and MDA, suggesting that these two stresses have distinct sites of action. In addition to quantitative increase in flavonoids, qualitative change in flavonoid composition was also marked during UV-B stress, and a new peak at 330 nm was found as compared to control.
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Claims 7
Claim · model-written summary
UV-B caused thylakoid lipid peroxidation and MDA formation in wheat seedlings.
- Taxon
- wheat
Triticum aestivume0 - Material
- 2329e0
- Treatment
- UV-B radiatione0
- Outcome
- lipid peroxidation of thylakoid membranee0
- Direction
- led toe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wheat seedlings (Triticum aestivum L. cv. 2329) oxidative stress caused by UV-B radiation led to lipid peroxidation of thylakoid membrane; it was expressed in term of malondialdehyde (MDA) formation”
Claim · model-written summary
Quercetin prevented lipid peroxidation in isolated chloroplasts.
- Taxon
- wheatTriticum aestivume0
- Treatment
- quercetine1
- Outcome
- peroxidation of lipids of thylakoid membranee1
- Direction
- preventede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat seedlings (Triticum aestivum L. cv. 2329)”
e1“The peroxidation of lipids of thylakoid membrane in isolated chloroplasts was prevented when flavonoids quercetin and rutin were supplied into the incubation medium”
Claim · model-written summary
Rutin prevented lipid peroxidation in isolated chloroplasts.
- Taxon
- wheatTriticum aestivume0
- Treatment
- rutine1
- Outcome
- peroxidation of lipids of thylakoid membranee1
- Direction
- preventede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat seedlings (Triticum aestivum L. cv. 2329)”
e1“The peroxidation of lipids of thylakoid membrane in isolated chloroplasts was prevented when flavonoids quercetin and rutin were supplied into the incubation medium”
Claim · model-written summary
Superoxide dismutase, ascorbate peroxidase and catalase activity increased early under UV-B.
- Taxon
- wheatTriticum aestivume0
- Treatment
- UV-B exposuree1
- Outcome
- activities of superoxide dismutase, ascorbate peroxidase, and catalasee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat seedlings (Triticum aestivum L. cv. 2329)”
e1“The activities of superoxide dismutase, ascorbate peroxidase, and catalase increased during the first hours of UV-B exposure”
Claim · model-written summary
UV-B and temperature had different antioxidant enzyme and MDA response profiles.
- Taxon
- wheatTriticum aestivume0
- Outcome
- different profiles of the antioxidant enzymes and MDAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat seedlings (Triticum aestivum L. cv. 2329)”
e1“UV-B and temperature effects showed different profiles of the antioxidant enzymes and MDA”
Claim · model-written summary
Flavonoid quantity increased during UV-B stress.
- Taxon
- wheatTriticum aestivume0
- Treatment
- UV-B stresse1
- Outcome
- flavonoidse1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat seedlings (Triticum aestivum L. cv. 2329)”
e1“quantitative increase in flavonoids, qualitative change in flavonoid composition was also marked during UV-B stress”
Claim · model-written summary
Flavonoid composition changed during UV-B stress, with a new 330 nm peak against control.
- Taxon
- wheatTriticum aestivume0
- Treatment
- UV-B stresse1
- Outcome
- new peak at 330 nme1
- Comparator
- controle1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat seedlings (Triticum aestivum L. cv. 2329)”
e1“qualitative change in flavonoid composition was also marked during UV-B stress, and a new peak at 330 nm was found as compared to control”
The same questions in other papers
uv · physiology: antioxidant enzymes · Triticum aestivum (wheat)Results differ
7 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- negative
9 papers more in this group
See all 13 papers →uv · physiology: oxidative · Triticum aestivum (wheat)Positive and negative results
11 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.