Abstract
Through shading with white gauze to simulate different light habitats (100%, 68.2% 35.4% and 16.7% of full sunlight), this paper studied the effects of light intensity on the morphological and physiological characteristics of tobacco seedlings. The results showed that with the decrease of relative light intensity, seedling height increased, while stem circumference, dry weight/fresh weight ratio, leaf thickness, specific leaf weight, and matter accumulation decreased. Less effect of light intensity was observed on the number of seedling leaves. Under weak light condition, the contents of free water, chlorophyll, total nitrogen, and protein in leaves increased, while bound water content, chlorophyll a/b ratio, and invertase activity decreased. The root/shoot ratio, root biomass, and root vitality also decreased. All of these suggested that weak light was unfavorable to the cultivation of strong tobacco seedlings, and the light conditions of seedbed should be improved in tobacco production.
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Claims 13
Claim · model-written summary
Seedling height increased as relative light intensity decreased.
- Taxon
- tobacco seedlings
Nicotiana tabacumt0 - Treatment
- decrease of relative light intensitye0
- Outcome
- seedling heighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the decrease of relative light intensity, seedling height increased, while stem circumference, dry weight/fresh weight ratio, leaf thickness, specific leaf weight, and matter accumulation decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Stem circumference decreased as relative light intensity decreased.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Treatment
- decrease of relative light intensitye0
- Outcome
- stem circumferencee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the decrease of relative light intensity, seedling height increased, while stem circumference, dry weight/fresh weight ratio, leaf thickness, specific leaf weight, and matter accumulation decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Dry weight/fresh weight ratio decreased as relative light intensity decreased.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Treatment
- decrease of relative light intensitye0
- Outcome
- dry weight/fresh weight ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the decrease of relative light intensity, seedling height increased, while stem circumference, dry weight/fresh weight ratio, leaf thickness, specific leaf weight, and matter accumulation decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Leaf thickness decreased as relative light intensity decreased.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Treatment
- decrease of relative light intensitye0
- Outcome
- leaf thicknesse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the decrease of relative light intensity, seedling height increased, while stem circumference, dry weight/fresh weight ratio, leaf thickness, specific leaf weight, and matter accumulation decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Specific leaf weight decreased as relative light intensity decreased.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Treatment
- decrease of relative light intensitye0
- Outcome
- specific leaf weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the decrease of relative light intensity, seedling height increased, while stem circumference, dry weight/fresh weight ratio, leaf thickness, specific leaf weight, and matter accumulation decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Matter accumulation decreased as relative light intensity decreased.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Treatment
- decrease of relative light intensitye0
- Outcome
- matter accumulatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the decrease of relative light intensity, seedling height increased, while stem circumference, dry weight/fresh weight ratio, leaf thickness, specific leaf weight, and matter accumulation decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Light intensity had less effect on seedling leaf number.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Treatment
- light intensitye0
- Outcome
- number of seedling leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Less effect of light intensity was observed on the number of seedling leaves.”
t0“tobacco seedlings”
Claim · model-written summary
Weak light increased free water, chlorophyll and total nitrogen contents in leaves.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Organ / stage
- leavese0
- Treatment
- weak light conditione0
- Outcome
- contents of free water, chlorophyll, total nitrogene0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under weak light condition, the contents of free water, chlorophyll, total nitrogen, and protein in leaves increased, while bound water content, chlorophyll a/b ratio, and invertase activity decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Weak light increased protein content in leaves.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Organ / stage
- leavese0
- Treatment
- weak light conditione0
- Outcome
- protein in leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under weak light condition, the contents of free water, chlorophyll, total nitrogen, and protein in leaves increased, while bound water content, chlorophyll a/b ratio, and invertase activity decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Weak light decreased bound water content and chlorophyll a/b ratio.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Organ / stage
- leavese0
- Treatment
- weak light conditione0
- Outcome
- bound water content, chlorophyll a/b ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under weak light condition, the contents of free water, chlorophyll, total nitrogen, and protein in leaves increased, while bound water content, chlorophyll a/b ratio, and invertase activity decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Weak light decreased invertase activity.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Organ / stage
- leavese0
- Treatment
- weak light conditione0
- Gene
- invertasee0
- Outcome
- invertase activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under weak light condition, the contents of free water, chlorophyll, total nitrogen, and protein in leaves increased, while bound water content, chlorophyll a/b ratio, and invertase activity decreased.”
t0“tobacco seedlings”
Claim · model-written summary
Weak light decreased root/shoot ratio, root biomass and root vitality.
- Taxon
- tobacco seedlingsNicotiana tabacumt0
- Treatment
- light intensityt0
- Outcome
- root/shoot ratio, root biomass, and root vitalitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root/shoot ratio, root biomass, and root vitality also decreased.”
t0“light intensity on morphological and physiological characteristics of tobacco seedlings”
Claim · model-written summary
The authors recommend improving seedbed light conditions for tobacco production.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- light conditions of seedbed should be improvede0
- Setting
- seedbede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the light conditions of seedbed should be improved in tobacco production.”
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