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“N-absorption efficiency”

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2010 ’20

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Associationauthor interpretationreview summarybasis n/a

Claim · model-written summary

Integrated agronomic, genetic and biotechnology techniques improve crop nitrogen absorption and assimilation.

Taxon: cropse0
Treatment: integration of agronomic management with genetic and biotechnology techniquese0
Outcome: N absorption and assimilatione0
Direction: improvese0

Verbatim

e0
“The integration of agronomic management with genetic and biotechnology techniques improves N absorption and assimilation in crops”
✓ located verbatim in the source · abstract, characters 823–952

Title

Nitrogen use efficiency in crops: integrated assessment, agronomic management, and molecular breeding strategies for sustainable productivity

Mosaed A. Majrashi Journal of the Saudi Society of Agricultural Sciences 2026. doi:10.1007/s44447-026-00174-4

Other claims from this paper (1)

Observation About half of nitrogen applied to crops is absorbed.

Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors suggest qNc8-4 markers RM4085 and RM1111 for marker-assisted improvement of low-input rice.

Taxon: riceOryza sativae0
Gene: qNc8-4e0
Outcome: improve the N absorption and utilization efficiency in low input rice varietiese0
Qualifier: RM4085 and RM1111e0

Verbatim

e0
“QTL markers of qNc8-4, RM4085 and RM1111, expressing in LN conditions, may be used to improve the N absorption and utilization efficiency in low input rice varieties through marker assisted selection (MAS) breeding programs”
✓ located verbatim in the source · abstract, characters 1254–1477

Title

QTL analysis of nitrogen content of plant shoot under two nitrogen conditions in rice (Oryza sativa L.)

Shikai Hu; Zeng Dali; Su Yan; et al. Australian Journal of Crop Science 2012

Other claims from this paper (8)

Observation Three shoot nitrogen-content QTLs were detected on chromosomes 5, 6, and 8.
Observation Individual QTLs explained 9.73 to 39.50% of phenotypic variation.
Association Two pairs of digenic epistatic loci were associated with nitrogen content.
Observation qNc8-4 was detected under both high and low nitrogen.
Observation qNc8-4 explained 18.35% of variation under high nitrogen.
Observation qNc8-4 explained 39.5% of variation under low nitrogen.
Observation The additive effect of qNc8-4 came from TN1.
Observation The authors considered qNc8-4 the main-effect locus for rice shoot nitrogen content.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Several transcription factors, kinases, transporters and N assimilation genes were highly expressed in high NUE wheat cultivar PBW677.

Taxon: WheatTriticum aestivumt0
Material: PBW677e0
Outcome: transcription factorse0
Direction: highly expressede0

Verbatim

e0
“We found several transcription factors (MYB, WRKY, RING finger protein, zinc finger protein, transporters, NRT1, amino acid transporters, sugar), protein kinases, and genes involved in N absorption, transportation, and assimilation to be highly expressed in high NUE cultivar PBW677.”
✓ located verbatim in the source · abstract, characters 1744–2027

t0
“Wheat Cultivars”
✓ located verbatim in the source · title, characters 105–120

Title

RNA-Seq-Based Transcriptomics Study to Investigate the Genes Governing Nitrogen Use Efficiency in Indian Wheat Cultivars

Sarabjit Kaur; Sarabjit Kaur; M. Shamshad; et al. Frontiers in Genetics 2022. doi:10.3389/fgene.2022.853910

Other claims from this paper (16)

Observation The contrasting wheat cultivars had 2,406 differentially expressed genes under N stress.
Observation Efficient wheat genotype PBW677 had 1,653 DEGs, more than PBW703.
Observation Inefficient wheat cultivar PBW703 had 753 DEGs.
Observation In PBW677, 903 DEGs were in roots.
Observation In PBW677, 750 DEGs were in shoots.
Observation In PBW703, 96 DEGs were in roots.
Observation In PBW703, 657 DEGs were in shoots.
Association Pathway analysis suggested different adaptive mechanisms in the two wheat cultivars.
Observation PBW677 enriched categories included DNA binding, abiotic stimulus response and photosynthesis.
Observation PBW677 enriched categories included carbon fixation, carbohydrate and nitrogen metabolism.
Observation PBW677 enriched categories included nitrate transport and translation.
Observation PBW703 enriched categories included nucleosome assembly, chromatin remodeling and DNA packaging.
Observation PBW703 enriched categories included lipid transport, sulfur metabolism and protein modification.
Observation PBW703 enriched categories included protein folding and refolding.
Observation Thirteen candidate wheat genes showed alternate expression in the two contrasting cultivars.
Recommendation The authors proposed these candidate genes as potential future breeding targets.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

FA2 upregulated gene expression of sugar transport proteins relative to CK.

Taxon: M9T337t0
Treatment: FA2 treatmente0
Outcome: gene expression of sugar transport proteinse0
Direction: upregulatede0
Comparator: CKe0

Verbatim

e0
“Compared with CK (control, the concentration of fulvic acid is 0 mg·L−1), the FA2 treatment strengthened photosynthesis, elevated the key enzyme activities related to C metabolism, upregulated the gene expression of sugar transport proteins, and increased the root sorbitol and sucrose contents, which suggested that the FA2 treatment optimally affected the root growth and N absorption because it enhanced photosynthate…” Show full quote
✓ located verbatim in the source · abstract, characters 1023–1509

t0
“M9T337 Seedlings”
✓ located verbatim in the source · title, characters 72–88

Title

Effects of Fulvic Acid on Growth and Nitrogen Utilization Efficiency in M9T337 Seedlings

Bo Yu; Laiping Wang; Dongdong Cui; et al. Plants 2023. doi:10.3390/plants12233937

Other claims from this paper (12)

Intervention effect Fulvic acid enhanced seedling dry weight, with the highest result at FA2.
Intervention effect Fulvic acid enhanced 15NUE, with the highest result at FA2.
Observation FA2 improved root morphology.
Observation FA2 improved root activity.
Intervention effect FA2 strengthened photosynthesis relative to CK.
Intervention effect FA2 elevated key enzyme activities related to C metabolism relative to CK.
Intervention effect FA2 increased root sorbitol and sucrose contents relative to CK.
Observation FA2 seedlings had higher NO3− influx rate.
Observation FA2 seedlings had higher NRT (nitrate transporter) gene expression.
Observation FA2 seedlings had relatively high nitrogen metabolism enzyme activities.
Observation FA2 promoted seedling 15N absorption.
Observation FA2 optimized distribution of C and N.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

EBR raised nitrate transporter gene expression.

Taxon: appleMalus domesticat0
Treatment: Exogenous EBRe0
Gene: nitrate transporter genee0
Outcome: nitrate transporter gene expression levele0
Direction: highere0
Comparator: untreated plantse0

Verbatim

e0
“Exogenous EBR-treated plants under NaCl stress displayed the more ideal root morphology and root activity, stronger salt stress tolerance and photosynthetic capacity as well as higher C- and N-assimilation enzyme activities, NO3− ion flow rate and nitrate transporter gene expression level than did untreated plants.”
✓ located verbatim in the source · abstract, characters 994–1310

t0
“apple”
✓ located verbatim in the source · title, characters 100–105

e1
“Furthermore, the results of isotope labeling noted that exogenous EBR application also enhanced 13 C-photoassimilate transport from leaves to roots and 15 NO3− transport from roots to leaves under NaCl stress.”
✓ located verbatim in the source · abstract, characters 1311–1520

Title

Exogenous 24-epibrassinolide promoted growth and nitrogen absorption and assimilation efficiency of apple seedlings under salt stress

Bo Yu; Laiping Wang; Qiuzhu Guan; et al. Frontiers in Plant Science 2023. doi:10.3389/fpls.2023.1178085

Other claims from this paper (10)

Intervention effect NaCl stress hampered seedling root growth.
Intervention effect Exogenous EBR alleviated NaCl suppression of root growth.
Intervention effect EBR improved root morphology and activity under NaCl relative to untreated plants.
Intervention effect EBR increased salt stress tolerance under NaCl relative to untreated plants.
Intervention effect EBR increased photosynthetic capacity under NaCl relative to untreated plants.
Intervention effect EBR raised carbon assimilation enzyme activities.
Intervention effect EBR raised nitrate ion flow rate.
Intervention effect EBR enhanced carbon photoassimilate transport from leaves to roots.
Intervention effect EBR enhanced nitrate transport from roots to leaves.
Mechanism The authors infer EBR improves nitrogen use efficiency under salt stress through improved photosynthesis, assimilation, nitrate handling and carbon and nitrogen distribution.

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“N-absorption efficiency”

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