Abstract
Abstract Wounding stresses were tested for their ability to induce an accumulation of antioxidants in harvested tobacco ( Nicotiana tabacum L.) and for the reduction of tobacco‐specific nitrosamines (TSNA) during subsequent air curing. Data indicated that root pruning of burley tobacco 1 week before harvest resulted in an increased accumulation of α ‐tocopherol, chlorogenic acid and rutin, compared with untreated plants. Wounding also increased total antioxidant capacity in both green and cured tobacco. Field experiments performed over 3 years showed a consistent decrease in nitrite concentration in leaves from wounded tobacco, and the reduction in TSNA was always associated with reduced levels of nitrite. Depending on climate and curing conditions, curing resulted in significant reductions in TSNA, compared with unwounded, control plants. Thus, the results suggested that higher endogenous antioxidants present during senescence and curing of wounding‐stressed tobacco may affect the propensities of those tissues to inhibit TSNA formation by reaction with nitrite.
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Claims 6
Claim · model-written summary
Root pruning increased α-tocopherol, chlorogenic acid and rutin accumulation relative to untreated tobacco.
Verbatim
e0“root pruning of burley tobacco 1 week before harvest resulted in an increased accumulation of α ‐tocopherol, chlorogenic acid and rutin, compared with untreated plants”
Claim · model-written summary
Wounding increased total antioxidant capacity in green and cured tobacco.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- green and cured tobaccoe0
- Treatment
- Woundinge0
- Outcome
- total antioxidant capacitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wounding also increased total antioxidant capacity in both green and cured tobacco”
Claim · model-written summary
Wounding decreased leaf nitrite concentration across three years.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- leavese0
- Treatment
- woundede0
- Outcome
- nitrite concentratione0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field experiments performed over 3 years showed a consistent decrease in nitrite concentration in leaves from wounded tobacco”
Claim · model-written summary
Reduced TSNA was associated with reduced nitrite levels.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- nitritee0
- Outcome
- TSNAe0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduction in TSNA was always associated with reduced levels of nitrite”
t0“Burley Tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
Depending on climate and curing conditions, curing significantly reduced TSNA relative to unwounded controls.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- curinge0
- Outcome
- TSNAe0
- Direction
- reductionse0
- Qualifier
- Depending on climate and curing conditionse0
- Comparator
- unwounded, control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Depending on climate and curing conditions, curing resulted in significant reductions in TSNA, compared with unwounded, control plants”
t0“Burley Tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
The authors suggested higher endogenous antioxidants may inhibit TSNA formation through reaction with nitrite.
- Taxon
- tobaccoNicotiana tabacume0
- Compound
- nitritee0
- Outcome
- TSNA formatione0
- Qualifier
- higher endogenous antioxidantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher endogenous antioxidants present during senescence and curing of wounding‐stressed tobacco may affect the propensities of those tissues to inhibit TSNA formation by reaction with nitrite”
The same questions in other papers
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- negative
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See all 9 papers →pruning · molecular: metabolites · Nicotiana tabacum (tobacco)Positive and negative results
22 papers in the same direction as this paper · 4 in the opposite direction
- negative
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See all 27 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.