Abstract
Silicon is the second most abundant element in soils and is beneficial for plant growth. Although, the localizations and polarities of rice Si transporters have been elucidated, the mechanisms that control the expression of Si transporter genes and the functional reasons for controlling expression are not well-understood. We developed a new model that simulates the dynamics of Si in the whole plant in rice by considering Si transport in the roots, distribution at the nodes, and signaling substances controlling transporter gene expression. To investigate the functional reason for the diurnal variation of the expression level, we compared investment efficiencies (the amount of Si accumulated in the upper leaf divided by the total expression level of Si transporter genes) at different model settings. The model reproduced the gradual decrease and diurnal variation of the expression level of the transporter genes observed by previous experimental studies. The results of simulation experiments showed that a considerable reduction in the expression of Si transporter genes during the night increases investment efficiency. Our study suggests that rice has a system that maximizes the investment efficiency of Si uptake.
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Claims 4
Claim · model-written summary
The rice silicon model reproduced a gradual decrease in transporter gene expression observed previously.
- Taxon
- Rice
Oryza sativat0 - Outcome
- expression level of the transporter genese0
- Direction
- gradual decreasee0
- Comparator
- previous experimental studiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The model reproduced the gradual decrease and diurnal variation of the expression level of the transporter genes observed by previous experimental studies”
t0“Rice”
Claim · model-written summary
The rice silicon model reproduced diurnal variation in transporter gene expression observed previously.
- Taxon
- RiceOryza sativat0
- Outcome
- diurnal variation of the expression level of the transporter genese0
- Comparator
- previous experimental studiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The model reproduced the gradual decrease and diurnal variation of the expression level of the transporter genes observed by previous experimental studies”
t0“Rice”
Claim · model-written summary
Simulated reduction of silicon transporter gene expression at night increased investment efficiency.
- Taxon
- RiceOryza sativat0
- Treatment
- a considerable reduction in the expression of Si transporter genes during the nighte0
- Outcome
- investment efficiencye0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a considerable reduction in the expression of Si transporter genes during the night increases investment efficiency”
t0“Rice”
Claim · model-written summary
The authors suggest rice has a system maximizing silicon uptake investment efficiency.
- Taxon
- riceOryza sativae0
- Outcome
- investment efficiency of Si uptakee0
- Direction
- maximizese0
- Qualifier
- a systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice has a system that maximizes the investment efficiency of Si uptake”