Abstract
Nitrogen application has an important effect on plant growth and development under drought stress. The aim of this study is to clarify the physiological and transcriptional regulation mechanism of nitrogen for improving drought resistance in peanut. The physiological indexes and root transcriptome of peanut under nitrogen application, drought stress and drought and nitrogen application simultaneously exist treatments were determined. The results showed that the drought and nitrogen application simultaneously exist treatment increased peanut biomass and the relative water content of leaves under drought stress. The content of total phenols and flavonoids in peanut roots were increased by nitrogen application under drought stress. Meanwhile, the activities of POD and CAT were increased, the content of MDA was decreased, which improved the drought resistance of peanut. Transcriptome analysis showed that the relative expression of 5396 genes changed due to nitrogen application. These genes were mainly involved in glutathione metabolism, nitrogen metabolism, and carbon metabolism, as well as stress and defense responses. Under drought stress, the drought and nitrogen application simultaneously exist treatments, the differentially expressed genes of secondary metabolite biosynthesis, transportation and catabolism and carbohydrate transport and metabolism were enriched. Among the three pathways related to phenolic metabolites, 51 differential genes were up-regulated and 207 genes were down-regulated under the drought and nitrogen application simultaneously exist treatment. In conclusion, the application of nitrogen fertilizer could enhance the antioxidant capacity of peanut plants under drought stress through regulating secondary metabolites and carbohydrate metabolism, and thus improve the drought resistance of peanut.
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Claims 10
Claim · model-written summary
Nitrogen under drought increased peanut biomass and leaf relative water content.
- Taxon
- peanut
Arachis hypogaeae0 - Treatment
- drought and nitrogen application simultaneously exist treatmente0
- Outcome
- peanut biomass and the relative water content of leavese0
- Direction
- increasede0
- Comparator
- drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the drought and nitrogen application simultaneously exist treatment increased peanut biomass and the relative water content of leaves under drought stress.”
Claim · model-written summary
Nitrogen under drought increased total phenols and flavonoids in peanut roots.
- Taxon
- peanutArachis hypogaeae0
- Organ / stage
- rootse0
- Treatment
- nitrogen application under drought stresse0
- Outcome
- content of total phenols and flavonoids in peanut rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of total phenols and flavonoids in peanut roots were increased by nitrogen application under drought stress.”
Claim · model-written summary
Nitrogen under drought increased peanut POD and CAT activities.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- nitrogen applicatione0
- Outcome
- activities of POD and CATe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of total phenols and flavonoids in peanut roots were increased by nitrogen application under drought stress. Meanwhile, the activities of POD and CAT were increased, the content of MDA was decreased, which improved the drought resistance of peanut.”
Claim · model-written summary
Nitrogen under drought decreased peanut MDA content.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- nitrogent0
- Outcome
- content of MDAe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content of MDA was decreased, which improved the drought resistance of peanut.”
t0“nitrogen alleviating drought stress in peanut”
Claim · model-written summary
Nitrogen application changed the relative expression of 5396 peanut genes.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- nitrogen applicatione0
- Outcome
- relative expression of 5396 genese0
- Value
- 5396 genese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transcriptome analysis showed that the relative expression of 5396 genes changed due to nitrogen application.”
t0“peanut”
Claim · model-written summary
Nitrogen-responsive genes were mainly involved in glutathione, nitrogen and carbon metabolism and stress and defense responses.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- glutathione metabolism, nitrogen metabolism, and carbon metabolism, as well as stress and defense responsese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These genes were mainly involved in glutathione metabolism, nitrogen metabolism, and carbon metabolism, as well as stress and defense responses.”
t0“peanut”
Claim · model-written summary
Under drought and nitrogen, genes for secondary metabolite biosynthesis, transport and catabolism were enriched.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- differentially expressed genes of secondary metabolite biosynthesis, transportation and catabolism and carbohydrate transport and metabolisme0
- Direction
- enrichede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the differentially expressed genes of secondary metabolite biosynthesis, transportation and catabolism and carbohydrate transport and metabolism were enriched.”
t0“peanut”
Claim · model-written summary
Among phenolic metabolite pathways under drought and nitrogen, 51 differential genes were upregulated.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- drought and nitrogen application simultaneously exist treatmente0
- Outcome
- differential genese0
- Direction
- up-regulatede0
- Value
- 51 differential genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the three pathways related to phenolic metabolites, 51 differential genes were up-regulated and 207 genes were down-regulated under the drought and nitrogen application simultaneously exist treatment.”
t0“peanut”
Claim · model-written summary
Among phenolic metabolite pathways under drought and nitrogen, 207 differential genes were downregulated.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- drought and nitrogen application simultaneously exist treatmente0
- Outcome
- differential genese0
- Direction
- down-regulatede0
- Value
- 207 genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the three pathways related to phenolic metabolites, 51 differential genes were up-regulated and 207 genes were down-regulated under the drought and nitrogen application simultaneously exist treatment.”
t0“peanut”
Claim · model-written summary
The authors infer nitrogen enhances peanut drought resistance through secondary metabolite and carbohydrate metabolism and improved antioxidant capacity.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- application of nitrogen fertilizere0
- Outcome
- drought resistance of peanute0
- Direction
- improvee0
- Qualifier
- through regulating secondary metabolites and carbohydrate metabolisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of nitrogen fertilizer could enhance the antioxidant capacity of peanut plants under drought stress through regulating secondary metabolites and carbohydrate metabolism, and thus improve the drought resistance of peanut.”
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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.