Abstract
Solving high-temperature plastic mulching film-induced leaf burning in the first week during tobacco cultivation would take much time and effort. In the present study, the growth as well as the leaf sugar and nicotine contents of seedlings with or without leaf burning induced by high-temperature plastic mulching film were tested at two independent sites in 2015 and 2016 to identify the influence of leaf burning on seedling growth. The results showed that the growth of seedlings with leaf burning was improved with increased leaf area, leaf number and plant height compared to those without leaf burning, combined with an increased seedling survival rate at two sites in two years. In seedlings with leaf burning, the contents of fructose and glucose increased and peaked at 11:00 and 13:00 in the leaf and root, respectively, with an increased root nicotine content beginning at 13:00, highlighting the signalling role of sugars. Activities of antioxidant enzymes including peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) were all increased in seedlings with leaf burning. More plant biomass was allocated to roots in seedlings with leaf burning with increased root volume compared to control seedlings, which might facilitate the absorption of water and nutrients from the soil. Our findings demonstrate that high-temperature plastic mulching film-induced leaf burning not inhibited but benefited seedling survival and growth, suggesting that the time and labour-consuming manual plucking of burnt leaves can be avoided during tobacco cultivation.
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Claims 9
Claim · model-written summary
Leaf burning increased seedling leaf area, leaf number, and height.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- leaf burninge0
- Outcome
- leaf area, leaf number and plant heighte0
- Direction
- increasede0
- Comparator
- those without leaf burninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth of seedlings with leaf burning was improved with increased leaf area, leaf number and plant height compared to those without leaf burning”
t0“tobacco cultivation”
Claim · model-written summary
Leaf burning increased seedling survival at two sites over two years.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- leaf burninge1
- Outcome
- seedling survival ratee0
- Direction
- increasede0
- Setting
- two sitese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increased seedling survival rate at two sites in two years”
e1“the growth of seedlings with leaf burning was improved”
t0“tobacco cultivation”
Claim · model-written summary
Leaf fructose and glucose contents increased and peaked at 11:00.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- leafe0
- Treatment
- leaf burninge1
- Outcome
- contents of fructose and glucosee0
- Direction
- increasede0
- Value
- 11:00e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the contents of fructose and glucose increased and peaked at 11:00 and 13:00 in the leaf and root, respectively”
e1“In seedlings with leaf burning, the contents”
t0“tobacco cultivation”
Claim · model-written summary
Root fructose and glucose contents increased and peaked at 13:00.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- roote0
- Treatment
- leaf burninge1
- Outcome
- contents of fructose and glucosee0
- Direction
- increasede0
- Value
- 13:00e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the contents of fructose and glucose increased and peaked at 11:00 and 13:00 in the leaf and root, respectively”
e1“In seedlings with leaf burning, the contents”
t0“tobacco cultivation”
Claim · model-written summary
Leaf burning increased root nicotine content beginning at 13:00.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- leaf burninge1
- Outcome
- root nicotine contente0
- Direction
- increasede0
- Qualifier
- beginning at 13:00e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increased root nicotine content beginning at 13:00”
e1“In seedlings with leaf burning, the contents”
t0“tobacco cultivation”
Claim · model-written summary
Leaf burning increased peroxidase, superoxide dismutase, and catalase activities.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- leaf burninge0
- Outcome
- Activities of antioxidant enzymes including peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Activities of antioxidant enzymes including peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) were all increased in seedlings with leaf burning”
t0“tobacco cultivation”
Claim · model-written summary
Leaf burning increased biomass allocation to roots.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- leaf burninge0
- Outcome
- plant biomass was allocated to rootse0
- Direction
- Moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More plant biomass was allocated to roots in seedlings with leaf burning”
t0“tobacco cultivation”
Claim · model-written summary
Leaf burning increased root volume over control seedlings.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- leaf burninge1
- Outcome
- root volumee0
- Direction
- increasede0
- Comparator
- control seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased root volume compared to control seedlings”
e1“in seedlings with leaf burning with increased root volume”
t0“tobacco cultivation”
Claim · model-written summary
The authors suggest avoiding manual removal of burnt leaves in tobacco cultivation.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- manual plucking of burnt leaves can be avoidede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the time and labour-consuming manual plucking of burnt leaves can be avoided during tobacco cultivation”
The same questions in other papers
fire · molecular: metabolites · Nicotiana tabacum (tobacco)Positive and negative results
1 in the opposite direction
- negative
fire · growth · Nicotiana tabacum (tobacco)Results agree
1 paper in the same direction as this paper
- positive
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.