Abstract
BACKGROUND: Nitrogen-based nutrients are the main factors affecting rice growth and development. Root systems play an important role in helping plants to obtain nutrients from the soil. Root morphology and physiology are often closely related to above-ground plant organs performance. Therefore, it is important to understand the regulatory effects of nitrogen (N) on rice root growth to improve nitrogen use efficiency. RESULTS: In this study, changes in the rice root traits under low N (13.33 ppm), normal N (40 ppm) and high N (120 ppm) conditions were performed through root morphology analysis. These results show that, compared with normal N conditions, root growth is promoted under low N conditions, and inhibited under high N conditions. To understand the molecular mechanism underlying the rice root response to low and high N conditions, comparative proteomics analysis was performed using a tandem mass tag (TMT)-based approach, and differentially abundant proteins (DAPs) were further characterized. Compared with normal N conditions, a total of 291 and 211 DAPs were identified under low and high N conditions, respectively. The abundance of proteins involved in cell differentiation, cell wall modification, phenylpropanoid biosynthesis, and protein synthesis was differentially altered, which was an important reason for changes in root morphology. Furthermore, although both low and high N can cause nitrogen stress, rice roots revealed obvious differences in adaptation to low and high N. CONCLUSIONS: These results provide insights into global changes in the response of rice roots to nitrogen availability and may facilitate the development of rice cultivars with high nitrogen use efficiency through root-based genetic improvements.
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Claims 6
Claim · model-written summary
Low nitrogen promoted rice root growth relative to normal nitrogen.
- Taxon
- rice
Oryza sativae2 - Treatment
- low N (13.33 ppm)e1
- Outcome
- root growthe0
- Direction
- promotede0
- Comparator
- normal N conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with normal N conditions, root growth is promoted under low N conditions”
e1“low N (13.33 ppm), normal N (40 ppm) and high N (120 ppm)”
e2“rice roots revealed obvious differences in adaptation to low and high N”
Claim · model-written summary
High nitrogen inhibited rice root growth relative to normal nitrogen.
- Taxon
- riceOryza sativae3
- Treatment
- high N (120 ppm)e1
- Outcome
- root growthe0
- Direction
- inhibitede0
- Comparator
- normal N conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root growth is promoted under low N conditions, and inhibited under high N conditions”
e1“low N (13.33 ppm), normal N (40 ppm) and high N (120 ppm)”
e2“compared with normal N conditions”
e3“rice roots revealed obvious differences in adaptation to low and high N”
Claim · model-written summary
Low nitrogen yielded 291 differentially abundant rice root proteins relative to normal nitrogen.
- Taxon
- riceOryza sativae1
- Treatment
- low N conditionse2
- Outcome
- DAPse0
- Value
- 291e0
- Comparator
- normal N conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with normal N conditions, a total of 291 and 211 DAPs were identified under low and high N conditions, respectively”
e1“rice roots revealed obvious differences in adaptation to low and high N”
e2“compared with normal N conditions, root growth is promoted under low N conditions”
Claim · model-written summary
High nitrogen yielded 211 differentially abundant rice root proteins relative to normal nitrogen.
- Taxon
- riceOryza sativae1
- Treatment
- high N conditionse0
- Outcome
- DAPse0
- Value
- 211e0
- Comparator
- normal N conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with normal N conditions, a total of 291 and 211 DAPs were identified under low and high N conditions, respectively”
e1“rice roots revealed obvious differences in adaptation to low and high N”
Claim · model-written summary
Proteins involved in cell differentiation, cell wall modification, phenylpropanoid biosynthesis, and protein synthesis changed abundance, which authors linked to root morphology.
Verbatim
e0“The abundance of proteins involved in cell differentiation, cell wall modification, phenylpropanoid biosynthesis, and protein synthesis was differentially altered, which was an important reason for changes in root morphology”
Claim · model-written summary
Rice roots showed distinct adaptations to low and high nitrogen.
- Taxon
- riceOryza sativae0
- Organ / stage
- rootse0
- Outcome
- differences in adaptation to low and high Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice roots revealed obvious differences in adaptation to low and high N”
The same questions in other papers
nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
- negative
- no effect
- negative
507 papers more in this group
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