Abstract
Nitrogen plays a crucial role in plant growth and defence mechanisms, yet its role in plant-pathogen interactions is complex and remains largely unexplored, especially in perennial crops. This study aimed to investigate the effects of controlled nitrogen nutrition levels on disease incidence, fungal communities, and plant physiology and metabolism. Esca is a widespread grapevine vascular disease affecting physiology, xylem integrity, and metabolism. Naturally infected Vitis vinifera L. cv. Sauvignon blanc were subjected to three ammonium nitrate treatments across three seasons, resulting in reduced esca incidence under nitrogen deficiency compared with medium nutrition levels, while excess nitrogen had no significant impact. Nitrogen treatments significantly impacted vine physiology and leaf metabolites, but did not affect fungal wood communities. Nitrogen deficiency significantly reduced stem diameter, photosynthesis, and leaf area, probably decreasing whole-plant transpiration, while excess nitrogen increased these factors, suggesting a key role for plant transpiration in esca incidence. Additionally, nitrogen deficiency led to significantly higher production of phenylpropanoids, particularly flavonoids, in leaf metabolomes compared with the medium level. These findings highlight the pivotal role of nitrogen in the development of esca through alterations in vine morphology, physiology, and metabolism. Fertilization practices may be crucial in the management of plant diseases.
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Claims 10
Claim · model-written summary
Nitrogen deficiency reduced esca incidence compared with medium nitrogen nutrition levels in grapevine.
- Treatment
- nitrogen deficiencye1
- Outcome
- esca incidencee1
- Direction
- reducede1
- Comparator
- medium nutrition levelse1
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“reduced esca incidence under nitrogen deficiency compared with medium nutrition levels”
Claim · model-written summary
Excess nitrogen had no significant impact on esca incidence.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“reduced esca incidence under nitrogen deficiency compared with medium nutrition levels, while excess nitrogen had no significant impact”
Claim · model-written summary
Nitrogen treatments significantly impacted vine physiology and leaf metabolites.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“Nitrogen treatments significantly impacted vine physiology and leaf metabolites”
Claim · model-written summary
Nitrogen treatments did not affect fungal wood communities.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“Nitrogen treatments significantly impacted vine physiology and leaf metabolites, but did not affect fungal wood communities”
Claim · model-written summary
Nitrogen deficiency significantly reduced stem diameter, photosynthesis and leaf area.
- Treatment
- Nitrogen deficiencye1
- Outcome
- stem diameter, photosynthesis, and leaf areae1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“Nitrogen deficiency significantly reduced stem diameter, photosynthesis, and leaf area”
Claim · model-written summary
Excess nitrogen increased stem diameter, photosynthesis and leaf area.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“Nitrogen deficiency significantly reduced stem diameter, photosynthesis, and leaf area, probably decreasing whole-plant transpiration, while excess nitrogen increased these factors”
Claim · model-written summary
The authors suggest a key role for plant transpiration in esca incidence.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“suggesting a key role for plant transpiration in esca incidence”
Claim · model-written summary
Nitrogen deficiency led to significantly higher production of phenylpropanoids, particularly flavonoids, in leaf metabolomes compared with the medium level.
- Organ / stage
- leafe1
- Treatment
- nitrogen deficiencye1
- Outcome
- production of phenylpropanoids, particularly flavonoidse1
- Direction
- highere1
- Comparator
- the medium levele1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“nitrogen deficiency led to significantly higher production of phenylpropanoids, particularly flavonoids, in leaf metabolomes compared with the medium level”
Claim · model-written summary
Nitrogen plays a pivotal role in the development of esca through alterations in vine morphology, physiology and metabolism.
- Treatment
- nitrogene1
- Outcome
- development of escae1
- Qualifier
- alterations in vine morphology, physiology, and metabolisme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e1“the pivotal role of nitrogen in the development of esca through alterations in vine morphology, physiology, and metabolism”
Claim · model-written summary
Fertilization practices may be crucial in the management of plant diseases.
- Outcome
- management of plant diseasese1
Not reportedTaxon
Verbatim
e1“Fertilization practices may be crucial in the management of plant diseases”
The same questions in other papers
nitrogen · disease · VitisPositive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
2 papers more in this group
See all 6 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.