Abstract
Maintaining grapevine productivity with limited inputs is crucial in Mediterranean areas. Apart from water, nitrogen (N) is also an important limiting factor in grape growing. The effects of N deficiency on grapevine growth were investigated in this study. Two-year-old Vitis vinifera L.cv. Shiraz plants grafted on 110 R were grown in pots placed outside and exposed to various N supplies (0, 0.6, 1.2, 2.4 and 12g plant-1) under well-watered conditions. At veraison, plants were harvested and organs separately dried, weighed and analysed for N. During plant growth, the length of the primary and secondary axes and the number of leaves on them were recorded. The N content of leaves was also analysed at three phenological stages (flowering, bunch closure and veraison). All growth processes were inhibited by N deficiency in an intensity-dependent manner. Quantitative relationships with N supply were established. Vegetative growth responded negatively to N stress when comparing control N supply with no N supply: primary axis elongation (-61%), leaf emergence on the primary axis (-47%), leaf emergence on the secondary axis (-94%) and lamina area expansion (-45%). Significant differences on the plant N status were observed from flowering onwards which might be useful for managing fertilisation.
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Claims 6
Claim · model-written summary
Nitrogen deficiency inhibited grapevine growth in an intensity-dependent manner.
- Treatment
- N deficiencye0
- Outcome
- growth processese0
- Direction
- inhibitede0
- Qualifier
- intensity-dependent mannere0
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All growth processes were inhibited by N deficiency in an intensity-dependent manner”
t0“grapevine”
Claim · model-written summary
No nitrogen reduced primary axis elongation by 61% relative to control nitrogen supply.
- Treatment
- no N supplye0
- Outcome
- primary axis elongatione0
- Direction
- negativelye0
- Value
- -61%e0
- Comparator
- control N supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth responded negatively to N stress when comparing control N supply with no N supply: primary axis elongation (-61%)”
t0“grapevine”
Claim · model-written summary
No nitrogen reduced primary axis leaf emergence by 47%.
- Treatment
- no N supplye0
- Outcome
- leaf emergence on the primary axise0
- Value
- -47%e0
- Comparator
- control N supplye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“control N supply with no N supply: primary axis elongation (-61%), leaf emergence on the primary axis (-47%)”
t0“grapevine”
Claim · model-written summary
No nitrogen reduced secondary axis leaf emergence by 94%.
- Treatment
- no N supplye0
- Outcome
- leaf emergence on the secondary axise0
- Value
- -94%e0
- Comparator
- control N supplye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“control N supply with no N supply: primary axis elongation (-61%), leaf emergence on the primary axis (-47%), leaf emergence on the secondary axis (-94%)”
t0“grapevine”
Claim · model-written summary
No nitrogen reduced lamina expansion by 45%.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“control N supply with no N supply: primary axis elongation (-61%), leaf emergence on the primary axis (-47%), leaf emergence on the secondary axis (-94%) and lamina area expansion (-45%)”
t0“grapevine”
Claim · model-written summary
Plant nitrogen status differed significantly from flowering onward.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences on the plant N status were observed from flowering onwards”
t0“grapevine”
The same questions in other papers
nitrogen · growth · VitisPositive and negative results
16 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- positive
- positive
17 papers more in this group
See all 21 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.