Abstract
Dynamic changes of starch content, amylose content, sucrose content and the activities of starch synthesis enzymes under shading treatment after flowering were studied using IR72 (indica) and Nipponbare (japonica) as material. Under shading treatments, starch, amylose and sucrose contents in the rice grain decreased, while ADP-glucose pyrophosphorylase (ADPGPPase) activity only changed a little, soluble starch synthase activity and granule bound starch synthase activity were decreased, soluble starch branching enzyme activity and granule bound starch branching enzyme activity were increased. Starch debranching enzyme activity was decreased in IR72, while increased in Nipponbare compared with the normal treatment. Correlation analysis showed that changes of starch content were positively and significantly correlated with changes of sucrose content under weak light. Both ADPGPPase activity and soluble starch branching enzyme activity were positively and significantly correlated with starch accumulation rate. It was implied that the decline of starch synthesis enzyme activities was relative to the decrease of starch component, and the increase of the activity of starch branching enzyme played an important role in the decrease of ratio of amylose to the total starch under weak light.
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Claims 11
Claim · model-written summary
Shading reduced grain starch, amylose and sucrose contents.
- Taxon
- rice
Oryza sativae0 - Treatment
- shading treatmentse0
- Outcome
- starch, amylose and sucrose contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under shading treatments, starch, amylose and sucrose contents in the rice grain decreased”
t0“Effects of Weak Light on Rice Starch Accumulation and Starch Synthesis Enzyme Activities at Grain Filling Stage”
Claim · model-written summary
ADP-glucose pyrophosphorylase activity changed little with shading.
- Taxon
- RiceOryza sativat0
- Treatment
- shadinge1
- Outcome
- ADP-glucose pyrophosphorylase (ADPGPPase) activitye0
- Direction
- changed a littlee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ADP-glucose pyrophosphorylase (ADPGPPase) activity only changed a little”
t0“Effects of Weak Light on Rice Starch Accumulation and Starch Synthesis Enzyme Activities at Grain Filling Stage”
e1“Under shading treatments, starch, amylose and sucrose contents in the rice grain decreased”
Claim · model-written summary
Shading decreased soluble and granule bound starch synthase activities.
- Taxon
- RiceOryza sativat0
- Treatment
- Weak Lightt0
- Outcome
- soluble starch synthase activity and granule bound starch synthase activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soluble starch synthase activity and granule bound starch synthase activity were decreased”
t0“Effects of Weak Light on Rice Starch Accumulation and Starch Synthesis Enzyme Activities at Grain Filling Stage”
Claim · model-written summary
Shading increased soluble and granule bound starch branching enzyme activities.
- Taxon
- RiceOryza sativat0
- Treatment
- Weak Lightt0
- Outcome
- soluble starch branching enzyme activity and granule bound starch branching enzyme activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soluble starch branching enzyme activity and granule bound starch branching enzyme activity were increased”
t0“Effects of Weak Light on Rice Starch Accumulation and Starch Synthesis Enzyme Activities at Grain Filling Stage”
Claim · model-written summary
Shading decreased starch debranching enzyme activity in IR72.
- Taxon
- RiceOryza sativat0
- Material
- IR72e0
- Treatment
- Weak Lightt0
- Outcome
- Starch debranching enzyme activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch debranching enzyme activity was decreased in IR72”
t0“Effects of Weak Light on Rice Starch Accumulation and Starch Synthesis Enzyme Activities at Grain Filling Stage”
Claim · model-written summary
Shading increased starch debranching enzyme activity in Nipponbare relative to normal treatment.
- Taxon
- RiceOryza sativat0
- Material
- Nipponbaree0
- Treatment
- Weak Lightt0
- Outcome
- Starch debranching enzyme activitye1
- Direction
- increasede0
- Comparator
- normal treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased in Nipponbare compared with the normal treatment”
t0“Effects of Weak Light on Rice Starch Accumulation and Starch Synthesis Enzyme Activities at Grain Filling Stage”
e1“Starch debranching enzyme activity was decreased in IR72”
Claim · model-written summary
Changes in starch and sucrose contents were positively correlated under weak light.
- Taxon
- riceOryza sativat0
- Compound
- sucrosee0
- Outcome
- changes of starch contente0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“changes of starch content were positively and significantly correlated with changes of sucrose content under weak light”
t0“Under shading treatments, starch, amylose and sucrose contents in the rice grain decreased”
Claim · model-written summary
ADPGPPase activity was positively correlated with starch accumulation rate.
- Taxon
- RiceOryza sativat0
- Gene
- ADPGPPasee0
- Outcome
- starch accumulation ratee0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ADPGPPase activity and soluble starch branching enzyme activity were positively and significantly correlated with starch accumulation rate”
t0“Rice”
Claim · model-written summary
Soluble starch branching enzyme activity was positively correlated with starch accumulation rate.
- Taxon
- RiceOryza sativat0
- Gene
- soluble starch branching enzymee0
- Outcome
- starch accumulation ratee0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soluble starch branching enzyme activity were positively and significantly correlated with starch accumulation rate”
t0“Rice”
Claim · model-written summary
Authors suggested declining synthesis enzyme activity was related to reduced starch components.
- Taxon
- RiceOryza sativat0
- Gene
- starch synthesis enzymee0
- Outcome
- decrease of starch componente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decline of starch synthesis enzyme activities was relative to the decrease of starch component”
t0“Rice”
Claim · model-written summary
Authors suggested increased starch branching enzyme activity contributed to a lower amylose-to-starch ratio.
- Taxon
- RiceOryza sativat0
- Gene
- starch branching enzymee0
- Outcome
- decrease of ratio of amylose to the total starche0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase of the activity of starch branching enzyme played an important role in the decrease of ratio of amylose to the total starch under weak light”
t0“Rice”
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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.