Abstract
Cellulose from plant biomass is the largest renewable energy resource of carbon fixed from the atmosphere, which can be converted into fermentable sugars for production into ethanol. However, the cellulose present as lignocellulosic biomass is embedded in a hemicellulose and lignin matrix from which it needs to be extracted for efficient processing. Here, we show that expression of an Arabidopsis (Arabidopsis thaliana) transcription factor, SHINE (SHN), in rice (Oryza sativa), a model for the grasses, causes a 34% increase in cellulose and a 45% reduction in lignin content. The rice AtSHN lines also exhibit an altered lignin composition correlated with improved digestibility, with no compromise in plant strength and performance. Using a detailed systems-level analysis of global gene expression in rice, we reveal the SHN regulatory network coordinating down-regulation of lignin biosynthesis and up-regulation of cellulose and other cell wall biosynthesis pathway genes. The results thus support the development of nonfood crops and crop wastes with increased cellulose and low lignin with good agronomic performance that could improve the economic viability of lignocellulosic crop utilization for biofuels.
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Claims 7
Claim · model-written summary
SHN expression in rice increased cellulose content by 34%.
- Taxon
- rice
Oryza sativae1 - Treatment
- expression of an Arabidopsis (Arabidopsis thaliana) transcription factor, SHINE (SHN)e1
- Gene
- SHNe1
- Outcome
- cellulosee1
- Direction
- increasee1
- Value
- 34%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“expression of an Arabidopsis (Arabidopsis thaliana) transcription factor, SHINE (SHN), in rice (Oryza sativa), a model for the grasses, causes a 34% increase in cellulose and a 45% reduction in lignin content”
Claim · model-written summary
SHN expression in rice reduced lignin content by 45%.
- Taxon
- riceOryza sativae1
- Treatment
- expression of an Arabidopsis (Arabidopsis thaliana) transcription factor, SHINE (SHN)e1
- Gene
- SHNe1
- Outcome
- lignin contente1
- Direction
- reductione1
- Value
- 45%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“expression of an Arabidopsis (Arabidopsis thaliana) transcription factor, SHINE (SHN), in rice (Oryza sativa), a model for the grasses, causes a 34% increase in cellulose and a 45% reduction in lignin content”
Claim · model-written summary
Altered lignin composition in rice AtSHN lines is correlated with improved digestibility.
- Taxon
- riceOryza sativae2
- Material
- rice AtSHN linese2
- Outcome
- digestibilitye2
- Direction
- improvede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The rice AtSHN lines also exhibit an altered lignin composition correlated with improved digestibility, with no compromise in plant strength and performance”
Claim · model-written summary
Rice AtSHN lines show no compromise in plant strength and performance.
- Taxon
- riceOryza sativae2
- Treatment
- rice AtSHN linese2
- Outcome
- plant strength and performancee2
- Direction
- no compromisee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The rice AtSHN lines also exhibit an altered lignin composition correlated with improved digestibility, with no compromise in plant strength and performance”
Claim · model-written summary
The SHN regulatory network down-regulates lignin biosynthesis in rice.
- Taxon
- riceOryza sativae4
- Treatment
- SHNe3
- Gene
- SHNe3
- Outcome
- lignin biosynthesise3
- Direction
- down-regulatione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the SHN regulatory network coordinating down-regulation of lignin biosynthesis and up-regulation of cellulose and other cell wall biosynthesis pathway genes”
e4“global gene expression in rice”
Claim · model-written summary
The SHN regulatory network up-regulates cellulose and other cell wall biosynthesis pathway genes in rice.
- Taxon
- riceOryza sativae4
- Treatment
- SHNe3
- Gene
- SHNe3
- Outcome
- cellulose and other cell wall biosynthesis pathway genese3
- Direction
- up-regulatione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the SHN regulatory network coordinating down-regulation of lignin biosynthesis and up-regulation of cellulose and other cell wall biosynthesis pathway genes”
e4“global gene expression in rice”
Claim · model-written summary
Development of nonfood crops and crop wastes with increased cellulose and low lignin is supported.
Verbatim
e5“The results thus support the development of nonfood crops and crop wastes with increased cellulose and low lignin with good agronomic performance”
The same questions in other papers
transgenic · molecular: metabolites · Oryza sativa (rice)Positive and negative results
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- negative
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