Abstract
Potassium is a nutrient element necessary for tobacco growth. Tobacco leaves with high potassium content are elastic and tough, rich in oil. And the same time, potassium can also improve the scent and aromatic value of flue-cured tobacco by regulating the synthesis of aromatic hydrocarbons in leaves.. It is an important quality indicator for flue-cured tobacco. However, the potassium concentration in tobacco leaves in most areas of China is generally lower than the global standard for high quality tobacco. Two tobacco genotypes were grafted to each other under different potassium levels to test whether potassium content and plant growth can be improved by grafting in tobacco. The growth of tobacco in all treatments was inhibited under potassium starvation, and grafting significantly alleviated this potassium stress in ‘Yunyan 87’. The trends in whole plant K + uptake and K + transfer efficiency to the leaves corresponded to the growth results of the different grafts. The nutrient depletion test results showed that the roots of ‘Wufeng No.2’ had higher K + absorption potential, K + affinity, and K + inward flow rate. K + enrichment circles appeared at the endoderm of the root section in the energy dispersive X-ray figure, indicating that the formation of Casparian strips may be partly responsible for the lower rate of lateral movement of K + in the roots of ‘Yunyan 87’. Gene expression analysis suggested that energy redistribution at the whole plant level might constitute one strategy for coping with potassium starvation. The feedback regulation effects between scion ‘Wufeng No.2’ and rootstock ‘Yunyan 87’ indicated that the transmission of certain signaling substances had occurred during grafting. ‘Wufeng No.2’ tobacco rootstock grafting can increase the K + uptake and transport efficiency of ‘Yunyan 87’ and enhance plant growth under potassium stress. The physiological mechanism of the improved performance of grafted tobacco is related to higher K + uptake and utilization ability, improved xylem K + loading capacity, and up-regulated expression of genes related to energy supply systems.
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Claims 12
Claim · model-written summary
Potassium starvation inhibited tobacco growth across treatments.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- potassium starvatione0
- Outcome
- growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth of tobacco in all treatments was inhibited under potassium starvation”
Claim · model-written summary
Grafting significantly alleviated potassium stress in Yunyan 87.
- Taxon
- tobaccoNicotiana tabacumt0
- Material
- Yunyan 87e0
- Treatment
- graftinge0
- Outcome
- potassium stresse0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grafting significantly alleviated this potassium stress in ‘Yunyan 87’”
t0“tobacco”
Claim · model-written summary
Whole plant potassium uptake trends corresponded to growth outcomes among grafts.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- different graftse0
- Outcome
- whole plant K + uptakee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The trends in whole plant K + uptake and K + transfer efficiency to the leaves corresponded to the growth results of the different grafts”
t0“tobacco”
Claim · model-written summary
Potassium transfer efficiency to leaves corresponded to growth outcomes among grafts.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- different graftse0
- Outcome
- K + transfer efficiency to the leavese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The trends in whole plant K + uptake and K + transfer efficiency to the leaves corresponded to the growth results of the different grafts”
t0“tobacco”
Claim · model-written summary
Wufeng No.2 roots had higher potassium absorption potential, affinity and inward flow rate.
- Taxon
- tobaccoNicotiana tabacumt0
- Material
- Wufeng No.2e0
- Organ / stage
- rootse0
- Outcome
- K + absorption potential, K + affinity, and K + inward flow ratee0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the roots of ‘Wufeng No.2’ had higher K + absorption potential, K + affinity, and K + inward flow rate”
t0“tobacco”
Claim · model-written summary
Potassium enrichment circles appeared at the root endoderm.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- endoderm of the root sectione0
- Outcome
- K + enrichment circles appearede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K + enrichment circles appeared at the endoderm of the root section”
t0“tobacco”
Claim · model-written summary
Casparian-strip formation may partly explain slower lateral potassium movement in Yunyan 87 roots.
- Taxon
- tobaccoNicotiana tabacumt0
- Material
- Yunyan 87e0
- Organ / stage
- rootse0
- Outcome
- lower rate of lateral movement of K +e0
- Direction
- lowere0
- Qualifier
- formation of Casparian stripse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the formation of Casparian strips may be partly responsible for the lower rate of lateral movement of K + in the roots of ‘Yunyan 87’”
t0“tobacco”
Claim · model-written summary
Gene-expression analysis suggested energy redistribution as a potassium-starvation response.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- coping with potassium starvatione0
- Qualifier
- energy redistribution at the whole plant levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gene expression analysis suggested that energy redistribution at the whole plant level might constitute one strategy for coping with potassium starvation”
t0“tobacco”
Claim · model-written summary
Feedback between Wufeng No.2 scions and Yunyan 87 rootstocks indicated transmission of signaling substances.
- Taxon
- tobaccoNicotiana tabacumt0
- Material
- Wufeng No.2e0
- Treatment
- graftinge0
- Outcome
- transmission of certain signaling substancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The feedback regulation effects between scion ‘Wufeng No.2’ and rootstock ‘Yunyan 87’ indicated that the transmission of certain signaling substances had occurred during grafting”
t0“tobacco”
Claim · model-written summary
Wufeng No.2 rootstock grafting increased Yunyan 87 potassium uptake and transport efficiency under stress.
- Taxon
- tobaccoNicotiana tabacume0
- Material
- Yunyan 87e0
- Treatment
- ‘Wufeng No.2’ tobacco rootstock graftinge0
- Outcome
- K + uptake and transport efficiencye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Wufeng No.2’ tobacco rootstock grafting can increase the K + uptake and transport efficiency of ‘Yunyan 87’ and enhance plant growth under potassium stress”
Claim · model-written summary
Wufeng No.2 rootstock grafting enhanced Yunyan 87 growth under potassium stress.
- Taxon
- tobaccoNicotiana tabacume0
- Material
- Yunyan 87e0
- Treatment
- ‘Wufeng No.2’ tobacco rootstock graftinge0
- Outcome
- plant growthe0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Wufeng No.2’ tobacco rootstock grafting can increase the K + uptake and transport efficiency of ‘Yunyan 87’ and enhance plant growth under potassium stress”
Claim · model-written summary
The authors relate grafted tobacco performance to potassium uptake and utilization, xylem loading and energy-supply gene expression.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- grafted tobaccoe0
- Outcome
- improved performancee0
- Qualifier
- higher K + uptake and utilization ability, improved xylem K + loading capacity, and up-regulated expression of genes related to energy supply systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The physiological mechanism of the improved performance of grafted tobacco is related to higher K + uptake and utilization ability, improved xylem K + loading capacity, and up-regulated expression of genes related to energy supply systems”
The same questions in other papers
grafting · growth · Nicotiana tabacum (tobacco)Positive and negative results
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potassium · growth · Nicotiana tabacum (tobacco)Positive and negative results
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This paper is about lacking the nutrient, so it counts the other way round here.
- negative
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- no effect
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See all 22 papers →grafting · nutrient: content · Nicotiana tabacum (tobacco)Results agree
4 papers in the same direction as this paper
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See all 5 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.