Abstract
The changes in respiration rate and soluble sugar content of detached rice (Oryza sativa) leaves were followed during methyl jasmonate (MJ)-promoted senescence. Increase in the respiration of detached rice leaves was observed as a consequence of methyl jasmonate (MJ) treatment for 48 h. However, MJ had no effect on photosynthetic rate in rice leaves. Sucrose and glucose contents, but not fructose content, were lower in MJ-treated rice leaves than in control leaves. KCN, an inhibitor of cytochrome c oxidase, was effective in inhibiting MJ-increased respiration rate, in reducing MJ-decreased sucrose and glucose contents, and in retarding MJ-promoted senescence of rice leaves. Exogenous addition of sucrose to MJ-treated rice leaves increased endogenous sucrose and glucose contents, but did not prevent MJ-promoted senescence of rice leaves. The role of respiration and sucrose in regulating MJ-promoted senescence of rice leaves is discussed.
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Claims 9
Claim · model-written summary
Methyl jasmonate increased detached rice leaf respiration after 48 h.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- detached rice leavese0
- Treatment
- methyl jasmonate (MJ) treatment for 48 he0
- Outcome
- respiratione0
- Direction
- Increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in the respiration of detached rice leaves was observed as a consequence of methyl jasmonate (MJ) treatment for 48 h”
Claim · model-written summary
Methyl jasmonate did not affect rice leaf photosynthetic rate.
- Taxon
- riceOryza sativae0
- Treatment
- MJe0
- Outcome
- photosynthetic ratee0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MJ had no effect on photosynthetic rate in rice leaves”
Claim · model-written summary
Methyl jasmonate lowered rice leaf sucrose and glucose contents versus controls.
- Taxon
- riceOryza sativae0
- Treatment
- MJ-treatede0
- Outcome
- Sucrose and glucose contentse0
- Direction
- lowere0
- Comparator
- control leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose and glucose contents, but not fructose content, were lower in MJ-treated rice leaves than in control leaves”
Claim · model-written summary
Methyl jasmonate did not lower fructose content versus controls.
- Taxon
- riceOryza sativae0
- Treatment
- MJ-treatede0
- Outcome
- fructose contente0
- Comparator
- control leavese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose and glucose contents, but not fructose content, were lower in MJ-treated rice leaves than in control leaves”
Claim · model-written summary
KCN inhibited the respiration increase promoted by methyl jasmonate.
- Treatment
- KCNe0
- Gene
- cytochrome c oxidasee0
- Outcome
- respiration ratee0
- Direction
- inhibitinge0
- Comparator
- MJ-increasede0
Not reportedTaxon
Verbatim
e0“KCN, an inhibitor of cytochrome c oxidase, was effective in inhibiting MJ-increased respiration rate”
Claim · model-written summary
KCN reduced methyl jasmonate induced depletion of sucrose and glucose.
- Taxon
- RiceOryza sativat0
- Treatment
- KCNe0
- Outcome
- sucrose and glucose contentse0
- Direction
- reducinge0
- Comparator
- MJ-decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KCN, an inhibitor of cytochrome c oxidase, was effective in inhibiting MJ-increased respiration rate, in reducing MJ-decreased sucrose and glucose contents”
t0“Rice Leaves”
Claim · model-written summary
KCN retarded methyl jasmonate promoted rice leaf senescence.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KCN, an inhibitor of cytochrome c oxidase, was effective in inhibiting MJ-increased respiration rate, in reducing MJ-decreased sucrose and glucose contents, and in retarding MJ-promoted senescence of rice leaves”
Claim · model-written summary
Added sucrose increased endogenous sucrose and glucose in MJ-treated rice leaves.
- Taxon
- riceOryza sativae0
- Treatment
- Exogenous addition of sucrosee0
- Outcome
- endogenous sucrose and glucose contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous addition of sucrose to MJ-treated rice leaves increased endogenous sucrose and glucose contents”
Claim · model-written summary
Added sucrose did not prevent methyl jasmonate promoted senescence.
- Taxon
- riceOryza sativae0
- Treatment
- Exogenous addition of sucrosee0
- Outcome
- senescence of rice leavese0
- Direction
- did not prevente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous addition of sucrose to MJ-treated rice leaves increased endogenous sucrose and glucose contents, but did not prevent MJ-promoted senescence of rice leaves”
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See all 6 papers →sucrose · molecular: metabolites · Oryza sativa (rice)Positive and negative results
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See all 7 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.