Abstract
The increase in UV-B radiation reaching the earth's surface has prompted extensive studies on the effects of UV-B on plants. However, most of these studies have not addressed the close characteristics related to future survival of plant populations. The purpose of this study was to investigate the effects of UV-B radiation on reactive oxygen species (ROS) accumulation and antioxidant defense system in relation to germination, tube length and viability of maize pollen. Our results indicate that increased UV-B radiation decreased the pollen germination rate and tube length in vitro and also its fertilization ability in the field. Production of O(2)(*-) and H(2)O(2) increased by UV-B radiation treatment, and their continuous accumulation resulted in lipid peroxidization. The activities of superoxide dismutase, catalase, peroxidase and DPPH-radical scavenging were decreased by increased UV-B radiation. The increased ROS and lipid peroxidization, and decreased activities of the antioxidants may be attributed to the effects of UV-B radiation on pollen germination, tube growth and fertilization ability.
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Claims 7
Claim · model-written summary
Increased UV-B radiation decreased pollen germination rate and tube length in vitro.
- Treatment
- increased UV-B radiatione0
- Outcome
- pollen germination rate and tube lengthe0
- Direction
- decreasede0
- Setting
- in vitroe0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays”
e0“Our results indicate that increased UV-B radiation decreased the pollen germination rate and tube length in vitro and also its fertilization ability in the field”
Claim · model-written summary
Increased UV-B radiation decreased pollen fertilization ability in the field.
- Treatment
- increased UV-B radiatione0
- Outcome
- fertilization abilitye0
- Direction
- decreasede0
- Setting
- in the fielde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays”
e0“Our results indicate that increased UV-B radiation decreased the pollen germination rate and tube length in vitro and also its fertilization ability in the field”
Claim · model-written summary
UV-B radiation treatment increased production of superoxide and hydrogen peroxide.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays”
e1“Production of O(2)(*-) and H(2)O(2) increased by UV-B radiation treatment, and their continuous accumulation resulted in lipid peroxidization”
Claim · model-written summary
Continuous accumulation of reactive oxygen species resulted in lipid peroxidization in maize pollen.
- Outcome
- lipid peroxidizatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays”
e1“Production of O(2)(*-) and H(2)O(2) increased by UV-B radiation treatment, and their continuous accumulation resulted in lipid peroxidization”
Claim · model-written summary
Increased UV-B radiation decreased superoxide dismutase, catalase and peroxidase activities.
- Treatment
- increased UV-B radiatione2
- Outcome
- superoxide dismutase, catalase, peroxidasee2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays”
e2“The activities of superoxide dismutase, catalase, peroxidase and DPPH-radical scavenging were decreased by increased UV-B radiation”
Claim · model-written summary
Increased UV-B radiation decreased DPPH-radical scavenging activity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays”
e2“The activities of superoxide dismutase, catalase, peroxidase and DPPH-radical scavenging were decreased by increased UV-B radiation”
Claim · model-written summary
The increased ROS, lipid peroxidation and decreased antioxidants may be attributed to UV-B effects on pollen germination, tube growth and fertilization ability.
- Treatment
- UV-B radiatione3
- Outcome
- pollen germination, tube growth and fertilization abilitye3
- Qualifier
- The increased ROS and lipid peroxidization, and decreased activities of the antioxidantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays”
e3“The increased ROS and lipid peroxidization, and decreased activities of the antioxidants may be attributed to the effects of UV-B radiation on pollen germination, tube growth and fertilization ability”
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