Abstract
Knowing the nitrogen use efficiency (NUE) of crops is crucial to minimize environmental pollution, although NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop. Through the growth of contrasting genotypes in nutritive solutions, we aimed to characterize five NUE components of 28 genotypes and to classify them according to their efficiency and responsiveness to nitrogen (N) availability. On average, physiological N use efficiency, N harvest index, and N uptake efficiency decreased by 16%, 4%, and 57%, respectively, under N-deficient conditions, while N utilization efficiency decreased by 43% at adequate N supply. The relative efficiency of N use varied from 35% to 59% among genotypes. All genotypes of the Virginia and Maryland varietal groups were efficient, and those of the Burley, Comum, and Dark groups were inefficient, while the responsiveness varied among genotypes within varietal groups, except for Maryland genotypes. Our findings are helpful in indicating genotypes with distinguished efficiency and responsiveness to N supply, which can be further chosen according to soil N level or affordability to N fertilizers worldwide in tobacco crops. In a general framework, this can lead to a more sustainable use of N and can support tobacco breeding programs for NUE.
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Claims 8
Claim · model-written summary
Under N-deficient conditions, physiological N use efficiency decreased by 16% on average in tobacco genotypes.
- Taxon
- tobacco
Nicotiana tabacume1 - Treatment
- N-deficient conditionse2
- Outcome
- physiological N use efficiencye2
- Direction
- decreasede2
- Value
- 16%e2
- Setting
- nutritive solutionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Through the growth of contrasting genotypes in nutritive solutions”
e1“NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop”
e2“On average, physiological N use efficiency, N harvest index, and N uptake efficiency decreased by 16%, 4%, and 57%, respectively, under N-deficient conditions”
Claim · model-written summary
Under N-deficient conditions, N harvest index decreased by 4% on average in tobacco genotypes.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- N-deficient conditionse2
- Outcome
- N harvest indexe2
- Direction
- decreasede2
- Value
- 4%e2
- Setting
- nutritive solutionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Through the growth of contrasting genotypes in nutritive solutions”
e1“NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop”
e2“On average, physiological N use efficiency, N harvest index, and N uptake efficiency decreased by 16%, 4%, and 57%, respectively, under N-deficient conditions”
Claim · model-written summary
Under N-deficient conditions, N uptake efficiency decreased by 57% on average in tobacco genotypes.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- N-deficient conditionse2
- Outcome
- N uptake efficiencye2
- Direction
- decreasede2
- Value
- 57%e2
- Setting
- nutritive solutionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Through the growth of contrasting genotypes in nutritive solutions”
e1“NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop”
e2“On average, physiological N use efficiency, N harvest index, and N uptake efficiency decreased by 16%, 4%, and 57%, respectively, under N-deficient conditions”
Claim · model-written summary
At adequate N supply, N utilization efficiency decreased by 43% in tobacco genotypes.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- adequate N supplye3
- Outcome
- N utilization efficiencye3
- Direction
- decreasede3
- Value
- 43%e3
- Setting
- nutritive solutionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Through the growth of contrasting genotypes in nutritive solutions”
e1“NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop”
e3“N utilization efficiency decreased by 43% at adequate N supply”
Claim · model-written summary
The relative efficiency of N use varied from 35% to 59% among tobacco genotypes.
- Taxon
- tobaccoNicotiana tabacume1
- Outcome
- relative efficiency of N usee4
- Value
- from 35% to 59%e4
- Qualifier
- among genotypese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop”
e4“The relative efficiency of N use varied from 35% to 59% among genotypes”
Claim · model-written summary
Genotypes of the Virginia and Maryland varietal groups were efficient in N use.
- Taxon
- tobaccoNicotiana tabacume1
- Material
- Virginia and Maryland varietal groupse5
- Outcome
- efficiente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop”
e5“All genotypes of the Virginia and Maryland varietal groups were efficient”
Claim · model-written summary
Genotypes of the Burley, Comum, and Dark groups were inefficient in N use.
- Taxon
- tobaccoNicotiana tabacume1
- Material
- Burley, Comum, and Dark groupse6
- Outcome
- inefficiente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop”
e6“those of the Burley, Comum, and Dark groups were inefficient”
Claim · model-written summary
Responsiveness to N supply varied among tobacco genotypes within varietal groups, except for Maryland genotypes.
- Taxon
- tobaccoNicotiana tabacume1
- Material
- genotypes within varietal groupse7
- Outcome
- responsivenesse7
- Qualifier
- except for Maryland genotypese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“NUE is rarely provided for numerous genotypes in the tobacco (Nicotiana tabacum L.) crop”
e7“the responsiveness varied among genotypes within varietal groups, except for Maryland genotypes”
The same questions in other papers
nitrogen · nutrient: efficiency · Nicotiana tabacum (tobacco)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
2 papers more in this group
See all 6 papers →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.