Abstract
Two indica rice(Oryza sativa L.) materials,Xieqingzao B(heat-sensitive) and 082(heat-tolerant),were used to study the role of brassinolide(BR) in protection of rice seedlings from heat stress.Young seedlings were subjected to higher temperature and sprayed with 0.005 mg/L of BR.Analysis was conducted on the contents of chlorophyll,protein,malondialdehyde(MDA),electrolyte leakage,the activities of peroxidase(POD) and superoxide dismutase(SOD) and their isozymes expression levels in leaves.Under the heat stress treatment,application of BR significantly increased the contents of chlorophyll and protein,the activities of POD and SOD,and reduced the level of MDA and the leakage of electrolyte in the leaves of the heat-sensitive material Xieqingzao B,whereas BR had less effect on those of the heat-tolerant material 082,relatively.The BR treatment enhanced the expression level of POD isozymes in the leaves of both materials.Under the heat stress and BR treatment,the expression of four SOD isozymes were reduced in 082,but the expression of two SOD isozymes A and B were increased in Xieqingzao B.This suggested that BR plays an important role in protection rice seedlings from heat stress through enhancing the activities or expression levels of protective enzymes in the leaves.The materials with various heat-tolerance might differ in the mechanism of response to heat stress with BR application.
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Claims 9
Claim · model-written summary
BR significantly increased chlorophyll and protein contents in heat-sensitive Xieqingzao B under heat stress.
- Taxon
- Rice
Oryza sativat0 - Material
- Xieqingzao Be1
- Treatment
- application of BRe0
- Outcome
- contents of chlorophyll and proteine0
- Direction
- increasede0
- Qualifier
- Under the heat stress treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Protective Roles of Brassinolide in Rice Seedlings under Heat Stress”
e0“Under the heat stress treatment,application of BR significantly increased the contents of chlorophyll and protein”
e1“the heat-sensitive material Xieqingzao B”
Claim · model-written summary
BR significantly increased POD and SOD activities in heat-sensitive Xieqingzao B under heat stress.
- Taxon
- RiceOryza sativat0
- Material
- Xieqingzao Be1
- Treatment
- application of BRe3
- Outcome
- the activities of POD and SODe3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Protective Roles of Brassinolide in Rice Seedlings under Heat Stress”
e3“application of BR significantly increased the contents of chlorophyll and protein,the activities of POD and SOD”
e1“the heat-sensitive material Xieqingzao B”
Claim · model-written summary
BR reduced MDA level and electrolyte leakage in heat-sensitive Xieqingzao B under heat stress.
- Taxon
- RiceOryza sativat0
- Material
- Xieqingzao Be4
- Organ / stage
- leavese4
- Treatment
- application of BRe2
- Outcome
- the level of MDA and the leakage of electrolytee4
- Direction
- reducede4
- Qualifier
- Under the heat stress treatmente2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Protective Roles of Brassinolide in Rice Seedlings under Heat Stress”
e4“and reduced the level of MDA and the leakage of electrolyte in the leaves of the heat-sensitive material Xieqingzao B”
e2“Under the heat stress treatment,application of BR”
Claim · model-written summary
BR had less effect in heat-tolerant material 082 than in heat-sensitive Xieqingzao B.
- Taxon
- RiceOryza sativat0
- Material
- 082e5
- Treatment
- BRe5
- Outcome
- effect on thosee5
- Direction
- lesse5
- Comparator
- Xieqingzao Be1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Protective Roles of Brassinolide in Rice Seedlings under Heat Stress”
e5“whereas BR had less effect on those of the heat-tolerant material 082,relatively”
e1“the heat-sensitive material Xieqingzao B”
Claim · model-written summary
BR enhanced POD isozyme expression in the leaves of both materials.
- Taxon
- RiceOryza sativat0
- Organ / stage
- leavese6
- Treatment
- BR treatmente6
- Gene
- POD isozymese6
- Outcome
- expression level of POD isozymese6
- Direction
- enhancede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Protective Roles of Brassinolide in Rice Seedlings under Heat Stress”
e6“The BR treatment enhanced the expression level of POD isozymes in the leaves of both materials”
Claim · model-written summary
Under heat stress and BR treatment, four SOD isozymes were reduced in expression in heat-tolerant 082.
- Taxon
- RiceOryza sativat0
- Material
- 082e7
- Treatment
- heat stress and BR treatmente7
- Gene
- SOD isozymese7
- Outcome
- expression of four SOD isozymese7
- Direction
- reducede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Protective Roles of Brassinolide in Rice Seedlings under Heat Stress”
e7“Under the heat stress and BR treatment,the expression of four SOD isozymes were reduced in 082”
Claim · model-written summary
Under heat stress and BR treatment, expression of SOD isozymes A and B increased in heat-sensitive Xieqingzao B.
- Taxon
- RiceOryza sativat0
- Material
- Xieqingzao Be6
- Treatment
- heat stress and BR treatmente7
- Gene
- SOD isozymes A and Be6
- Outcome
- expression of two SOD isozymes A and Be6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Protective Roles of Brassinolide in Rice Seedlings under Heat Stress”
e6“but the expression of two SOD isozymes A and B were increased in Xieqingzao B”
e7“Under the heat stress and BR treatment,the expression of four SOD isozymes were reduced in 082”
Claim · model-written summary
BR appears to protect rice seedlings from heat stress by enhancing protective enzyme activities or expression levels in leaves.
- Taxon
- riceOryza sativae7
- Treatment
- BRe7
- Outcome
- protection rice seedlings from heat stresse7
- Qualifier
- through enhancing the activities or expression levels of protective enzymese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“This suggested that BR plays an important role in protection rice seedlings from heat stress through enhancing the activities or expression levels of protective enzymes in the leaves”
Claim · model-written summary
Materials with different heat tolerance may differ in their mechanism of response to heat stress with BR.
- Taxon
- RiceOryza sativat0
- Treatment
- BR applicatione0
- Outcome
- mechanism of response to heat stresse0
- Qualifier
- with various heat-tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Protective Roles of Brassinolide in Rice Seedlings under Heat Stress”
e0“The materials with various heat-tolerance might differ in the mechanism of response to heat stress with BR application”
The same questions in other papers
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- positive
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See all 8 papers →heat · physiology: antioxidant enzymes · Oryza sativa (rice)Results differ
12 papers in the same direction as this paper · 14 in the opposite direction
- negative
- negative
- negative
23 papers more in this group
See all 27 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.