Abstract
Enhanced ultraviolet-B (UV-B) radiation has potentially harmful effects on terrestrial plant growth and development. To examine the effects of enhanced UV-B radiation on growth and photosynthesis, four elite maize inbred lines and their hybrids were irradiated with UV-B in glasshouse for 0h,2h,4h and 6h per day, a total of four days treatment. Under enhanced UV-B radiation, the fresh weight, dry weight, net photosynthetic rate and Fv/Fm of six maize seedlings were inhibited in a dose-dependent manner, with greater inhibition at the high dose. Among four maize inbred lines, Zheng58 was tolerant and Chang7-2 was susceptible to UV-B radiation. In two hybrids, Nongda108 was significantly superior to Zhengdan958 under three different UV-B treatments. The results showed that the responses of six materials to enhanced UV-B are not only inbred-specific but also hybrid-specific, and there exhibits the heterosis in crosses of maize inbred lines under enhanced UV-B.
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Claims 6
Claim · model-written summary
Enhanced UV-B radiation inhibited the fresh weight and dry weight of maize seedlings in a dose-dependent manner.
- Treatment
- enhanced UV-B radiatione1
- Outcome
- fresh weight, dry weighte1
- Direction
- inhibitede1
- Qualifier
- dose-dependent mannere1
- Setting
- glasshousee2
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under enhanced UV-B radiation, the fresh weight, dry weight, net photosynthetic rate and Fv/Fm of six maize seedlings were inhibited in a dose-dependent manner, with greater inhibition at the high dose”
e2“four elite maize inbred lines and their hybrids were irradiated with UV-B in glasshouse for 0h,2h,4h and 6h per day”
Claim · model-written summary
Enhanced UV-B radiation inhibited the net photosynthetic rate and Fv/Fm of maize seedlings in a dose-dependent manner.
- Treatment
- enhanced UV-B radiatione1
- Outcome
- net photosynthetic rate and Fv/Fme1
- Direction
- inhibitede1
- Qualifier
- dose-dependent mannere1
- Setting
- glasshousee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under enhanced UV-B radiation, the fresh weight, dry weight, net photosynthetic rate and Fv/Fm of six maize seedlings were inhibited in a dose-dependent manner, with greater inhibition at the high dose”
e2“four elite maize inbred lines and their hybrids were irradiated with UV-B in glasshouse for 0h,2h,4h and 6h per day”
Claim · model-written summary
Zheng58 was tolerant to UV-B radiation compared with Chang7-2 among maize inbred lines.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Among four maize inbred lines, Zheng58 was tolerant and Chang7-2 was susceptible to UV-B radiation”
e2“four elite maize inbred lines and their hybrids were irradiated with UV-B in glasshouse for 0h,2h,4h and 6h per day”
Claim · model-written summary
Chang7-2 was susceptible to UV-B radiation compared with Zheng58 among maize inbred lines.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Among four maize inbred lines, Zheng58 was tolerant and Chang7-2 was susceptible to UV-B radiation”
e2“four elite maize inbred lines and their hybrids were irradiated with UV-B in glasshouse for 0h,2h,4h and 6h per day”
Claim · model-written summary
Nongda108 was significantly superior to Zhengdan958 under three UV-B treatments in maize hybrids.
- Material
- Nongda108e4
- Treatment
- three different UV-B treatmentse4
- Outcome
- significantly superiore4
- Direction
- superiore4
- Comparator
- Zhengdan958e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“In two hybrids, Nongda108 was significantly superior to Zhengdan958 under three different UV-B treatments”
e2“four elite maize inbred lines and their hybrids were irradiated with UV-B in glasshouse for 0h,2h,4h and 6h per day”
Claim · model-written summary
Heterosis was present in crosses of maize inbred lines under enhanced UV-B.
- Outcome
- heterosis in crosses of maize inbred linese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“there exhibits the heterosis in crosses of maize inbred lines under enhanced UV-B”
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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.