Abstract
In order to study the reason phylloxera (Daktulosphaira vitifolia Fitch) feeding on roots leads to decreased plant productivity, the uptake and distribution of 13C photosynthates and 15N in the grape vine 'Wuhe 8612' in response to phylloxera infestation were investigated. Phylloxera and grapevines cocultivated in pots were treated with 13CO2 and 15N-urea. The plant weight, nitrogen concentration and accumulation, 15N utilization efficiency, Nitrogen derived from fertilizer (Ndff%), and carbon isotope ratio (δ13C) of different organs were measured. Phylloxera infestation significantly reduced grape weight, shoot length, and N concentration and accumulation in different organs, whereas it increased the ratio between N content of the of roots and above-ground organs. Phylloxera infestation reduced leaf and root nitrogen 15N utilization efficiency, by 24 % and 14 %, respectively compared to controls. Labeled leaves of infested plants took up rather more 13C and 15N and exported a substantial amount of these nutrients to roots. Labeled roots took up rather more 15N and exported a small amount of these nutrients to upper leaves. This study found that phylloxera infestation reduced 13C and 15N uptake in leaves and roots, but increased N and photosynthates, which were mostly distributed to the roots, but also to the upper leaves. These factors together led to weak grape vine growth.
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Claims 11
Claim · model-written summary
Phylloxera infestation significantly reduced grape weight, shoot length, and N concentration and accumulation in grape vine organs.
- Treatment
- Phylloxera infestatione2
- Interactor
- phylloxera
Phylloxerae2pest - Outcome
- grape weight, shoot length, and N concentration and accumulatione2
- Direction
- reducede2
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“Phylloxera infestation significantly reduced grape weight, shoot length, and N concentration and accumulation in different organs, whereas it increased the ratio between N content of the of roots and above-ground organs”
Claim · model-written summary
Phylloxera infestation increased the ratio between N content of grape vine roots and above-ground organs.
- Treatment
- Phylloxera infestatione2
- Outcome
- ratio between N content of the of roots and above-ground organse2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“Phylloxera infestation significantly reduced grape weight, shoot length, and N concentration and accumulation in different organs, whereas it increased the ratio between N content of the of roots and above-ground organs”
Claim · model-written summary
Phylloxera infestation reduced the leaf 15N utilization efficiency of grape vines by 24 % compared to controls.
- Organ / stage
- leafe2
- Treatment
- Phylloxera infestatione2
- Interactor
- PhylloxeraPhylloxerae2pest
- Outcome
- nitrogen 15N utilization efficiencye2
- Direction
- reducede2
- Value
- 24 %e2
- Comparator
- controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“Phylloxera infestation reduced leaf and root nitrogen 15N utilization efficiency, by 24 % and 14 %, respectively compared to controls”
Claim · model-written summary
Phylloxera infestation reduced the root 15N utilization efficiency of grape vines by 14 % compared to controls.
- Organ / stage
- roote2
- Treatment
- Phylloxera infestatione2
- Interactor
- PhylloxeraPhylloxerae2pest
- Outcome
- nitrogen 15N utilization efficiencye2
- Direction
- reducede2
- Value
- 14 %e2
- Comparator
- controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“Phylloxera infestation reduced leaf and root nitrogen 15N utilization efficiency, by 24 % and 14 %, respectively compared to controls”
Claim · model-written summary
Labeled leaves of infested grape vines took up more 13C and 15N.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“Labeled leaves of infested plants took up rather more 13C and 15N and exported a substantial amount of these nutrients to roots”
Claim · model-written summary
Labeled leaves of infested grape vines exported a substantial amount of 13C and 15N to the roots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“Labeled leaves of infested plants took up rather more 13C and 15N and exported a substantial amount of these nutrients to roots”
Claim · model-written summary
Labeled roots of grape vines took up more 15N.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“Labeled roots took up rather more 15N and exported a small amount of these nutrients to upper leaves”
Claim · model-written summary
Labeled roots of grape vines exported a small amount of 15N to the upper leaves.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“Labeled roots took up rather more 15N and exported a small amount of these nutrients to upper leaves”
Claim · model-written summary
Phylloxera infestation reduced 13C and 15N uptake in grape vine leaves and roots.
- Organ / stage
- leaves and rootse2
- Treatment
- phylloxera infestatione2
- Interactor
- phylloxeraPhylloxerae2pest
- Outcome
- 13C and 15N uptakee2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“This study found that phylloxera infestation reduced 13C and 15N uptake in leaves and roots, but increased N and photosynthates, which were mostly distributed to the roots, but also to the upper leaves”
Claim · model-written summary
Phylloxera infestation increased N and photosynthates in grape vines, mostly distributed to the roots.
- Treatment
- phylloxera infestatione2
- Outcome
- N and photosynthatese2
- Direction
- increasede2
- Qualifier
- mostly distributed to the rootse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“grape vine 'Wuhe 8612'”
e2“This study found that phylloxera infestation reduced 13C and 15N uptake in leaves and roots, but increased N and photosynthates, which were mostly distributed to the roots, but also to the upper leaves”
Claim · model-written summary
The redistribution of carbon and nitrogen together leads to weak grape vine growth under phylloxera infestation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These factors together led to weak grape vine growth”
The same questions in other papers
infection · Phylloxera · VitisPositive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- 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.