Abstract
Barely cultivars (Hordeum vulgare L. cvs Giza 121 and Sahrawy) were grown under controlled conditions in growth chamber with and without UV-B radiation. After 40 days, the growth parameters such as plant length, fresh and dry weights of plants as well as leaf area had decreased in both varieties. Furthermore, plants treated with UV-B radiation exhibited reduced contents of chlorophylls, carotenoids and other photosynthetic pigments, photosynthetic rate, Rubisco N, total leaf N, total soluble protein and flavonoids concentrations with a great decrease in Giza 121 indicating that there was a difference between Giza 121, and Sahrawy in the resistance to the effect of UV-B radiation. Superoxide anion (O2) generation rate, hydrogen peroxide (H2O2), malondialdehyde (MDA) contents and relative electrolyte conductivity (EC) and activity of some antioxidant enzymes (SOD, CAT and AP) in both cultivars were also measured. Significant increase in these parameters was found indicating the drastic effect of UV-B radiation on the membrane system.
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Claims 7
Claim · model-written summary
UV-B decreased plant length and plant weights and leaf area in both cultivars.
- Taxon
- Hordeum vulgare L.
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- UV-B radiationt1
- Outcome
- plant length, fresh and dry weights of plants as well as leaf areae0
- Direction
- decreasede0
- Comparator
- without UV-B radiationt1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“After 40 days, the growth parameters such as plant length, fresh and dry weights of plants as well as leaf area had decreased in both varieties”
t0“Hordeum vulgare L.”
t1“without UV-B radiation”
Claim · model-written summary
UV-B reduced chlorophylls, carotenoids and other photosynthetic pigments.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- UV-B radiatione0
- Outcome
- contents of chlorophylls, carotenoids and other photosynthetic pigmentse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with UV-B radiation exhibited reduced contents of chlorophylls, carotenoids and other photosynthetic pigments”
t0“Hordeum vulgare L.”
Claim · model-written summary
UV-B reduced photosynthetic rate, Rubisco N and total leaf N.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- UV-B radiationt1
- Outcome
- photosynthetic rate, Rubisco N, total leaf Ne0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic rate, Rubisco N, total leaf N, total soluble protein and flavonoids concentrations with a great decrease in Giza 121”
t0“Hordeum vulgare L.”
t1“without UV-B radiation”
Claim · model-written summary
UV-B reduced soluble protein and flavonoid concentrations, especially in Giza 121.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Material
- Giza 121e0
- Treatment
- UV-B radiationt1
- Outcome
- total soluble protein and flavonoids concentrationse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total soluble protein and flavonoids concentrations with a great decrease in Giza 121”
t0“Hordeum vulgare L.”
t1“without UV-B radiation”
Claim · model-written summary
Giza 121 and Sahrawy differed in UV-B resistance.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Material
- Giza 121e0
- Outcome
- resistance to the effect of UV-B radiatione0
- Comparator
- Sahrawye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a difference between Giza 121, and Sahrawy in the resistance to the effect of UV-B radiation”
t0“Hordeum vulgare L.”
Claim · model-written summary
UV-B significantly increased superoxide generation, hydrogen peroxide and malondialdehyde.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- UV-B radiationt1
- Outcome
- Superoxide anion (O2) generation rate, hydrogen peroxide (H2O2), malondialdehyde (MDA) contentse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Superoxide anion (O2) generation rate, hydrogen peroxide (H2O2), malondialdehyde (MDA) contents and relative electrolyte conductivity (EC) and activity of some antioxidant enzymes (SOD, CAT and AP) in both cultivars were also measured. Significant increase in these parameters was found”
t0“Hordeum vulgare L.”
t1“without UV-B radiation”
Claim · model-written summary
UV-B significantly increased electrolyte conductivity and antioxidant enzyme activities.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- UV-B radiationt1
- Outcome
- relative electrolyte conductivity (EC) and activity of some antioxidant enzymes (SOD, CAT and AP)e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative electrolyte conductivity (EC) and activity of some antioxidant enzymes (SOD, CAT and AP) in both cultivars were also measured. Significant increase in these parameters was found”
t0“Hordeum vulgare L.”
t1“without UV-B radiation”
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