Abstract
To examine the chilling resistance of a newly developed super hybrid rice (Oryza sativa) Liangyou 122 at the different temperatures, an experiment was conducted to investigate the photosynthetic pigments contents, changes in fatty acids content of thylakoid membrane and the activities of several anti-oxidative enzymes at milky stage with traditional hybrid rice Shanyou 63 as control, by growing rice under the 25/15 ℃ and 25/20 ℃ day/night temperature. The results showed that the malondialdehyde(MDA) content and superoxide anion(O2 · ) were increased remarkably, while the activities of superoxide dismutase(SOD) and catalase(CAT) were obviously decreased with the duration of low temperature treatment. Moreover, the change enhanced with the increased difference between day and night temperatures. Meanwhile, the index of unsaturated fatty acid (IUFA) of both varieties also increased. As a result, the photosynthetic rate and the chlorophyll content were decreased considerably, while at beginning the carotenoids content increased and then decreased. Of all the parameters investigated, the variation range in Liangyou 122 was less than that in Shanyou 63, but the values of the former were more than the latter, which means that Liangyou 122 may be more resistant to chilling temperature at the milky stage.
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Claims 8
Claim · model-written summary
Low temperature increased malondialdehyde content and superoxide anion.
- Taxon
- rice
Oryza sativae2 - Treatment
- low temperature treatmente1
- Outcome
- malondialdehyde(MDA) content and superoxide anion(O2 · )e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the malondialdehyde(MDA) content and superoxide anion(O2 · ) were increased remarkably”
e1“with the duration of low temperature treatment.”
e2“rice (Oryza sativa) Liangyou 122”
Claim · model-written summary
Low temperature decreased superoxide dismutase and catalase activities.
- Taxon
- riceOryza sativae1
- Treatment
- low temperature treatmente0
- Outcome
- activities of superoxide dismutase(SOD) and catalase(CAT)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of superoxide dismutase(SOD) and catalase(CAT) were obviously decreased with the duration of low temperature treatment.”
e1“rice (Oryza sativa) Liangyou 122”
Claim · model-written summary
The low temperature changes intensified with a larger day night temperature difference.
- Taxon
- riceOryza sativae1
- Treatment
- increased difference between day and night temperaturese0
- Outcome
- changee0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the change enhanced with the increased difference between day and night temperatures.”
e1“rice (Oryza sativa) Liangyou 122”
Claim · model-written summary
The unsaturated fatty acid index increased in both varieties.
- Taxon
- riceOryza sativae1
- Outcome
- index of unsaturated fatty acid (IUFA)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the index of unsaturated fatty acid (IUFA) of both varieties also increased.”
e1“rice (Oryza sativa) Liangyou 122”
Claim · model-written summary
Photosynthetic rate and chlorophyll content decreased.
- Taxon
- riceOryza sativae1
- Outcome
- photosynthetic rate and the chlorophyll contente0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the photosynthetic rate and the chlorophyll content were decreased considerably”
e1“rice (Oryza sativa) Liangyou 122”
Claim · model-written summary
Carotenoids content initially increased and then decreased.
- Taxon
- riceOryza sativae1
- Outcome
- carotenoids contente0
- Direction
- increased and then decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at beginning the carotenoids content increased and then decreased.”
e1“rice (Oryza sativa) Liangyou 122”
Claim · model-written summary
Parameter variation was smaller in Liangyou 122 than Shanyou 63.
- Taxon
- riceOryza sativae1
- Material
- Liangyou 122e0
- Outcome
- variation rangee0
- Direction
- less thane0
- Comparator
- Shanyou 63e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the variation range in Liangyou 122 was less than that in Shanyou 63”
e1“rice (Oryza sativa) Liangyou 122”
Claim · model-written summary
The authors infer greater chilling resistance in Liangyou 122 at the milky stage.
- Taxon
- riceOryza sativae1
- Material
- Liangyou 122e0
- Organ / stage
- milky stagee0
- Outcome
- resistant to chilling temperaturee0
- Direction
- more resistante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liangyou 122 may be more resistant to chilling temperature at the milky stage.”
e1“rice (Oryza sativa) Liangyou 122”
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See all 24 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.