Abstract
SummaryStrawberry plants were grown in conditions producing moderate or severe deficiencies of phosphorus and nitrogen, and the effect on leaf growth assessed in terms of weight and area increases, and the number and size of their constituent cells. Deficiency of both phosphorus and nitrogen reduced the rate of leaf production. Decreased leaf areas were due almost entirely to lower cell numbers and, to a lesser extent in severe deficiency, to smaller cells. The rate of cell production was markedly reduced by phosphorus and nitrogen deficiency, but continued until maximum leaf area was attained, increases in mean cell size having ceased earlier. There was no nutritional effect on cell number or cell size before leaf emergence and it is suggested that the rapid divergence of response thereafter may be related to photosynthetic development after emergence.The effect of phosphorus and nitrogen deficiency on potential fruit yield was confined to the inhibition of branch crown proliferation and the lack of available sites for flower initiation. There was no effect of nutrient level on the number of flowers initiated on each apical meristem. Results suggest that any manipulation of nutrient status aimed at increasing fruit yields should be predominantly concerned with increasing branch crown formation, thus providing additional sites for flower initiation.
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Claims 7
Claim · model-written summary
Phosphorus and nitrogen deficiency reduced the rate of leaf production in strawberry.
- Taxon
- Strawberry plants
_single2.jpg?width=60)
Fragaria ×ananassae0 - Treatment
- Deficiency of both phosphorus and nitrogene1
- Outcome
- rate of leaf productione1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Strawberry plants were grown in conditions producing moderate or severe deficiencies of phosphorus and nitrogen”
e1“Deficiency of both phosphorus and nitrogen reduced the rate of leaf production”
Claim · model-written summary
Decreased strawberry leaf area under P and N deficiency was due to lower cell numbers.
- Taxon
- Strawberry plantsFragaria ×ananassae0
- Outcome
- Decreased leaf arease2
- Qualifier
- lower cell numberse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry plants were grown in conditions producing moderate or severe deficiencies of phosphorus and nitrogen”
e2“Decreased leaf areas were due almost entirely to lower cell numbers and, to a lesser extent in severe deficiency, to smaller cells”
Claim · model-written summary
Phosphorus and nitrogen deficiency markedly reduced the rate of cell production in strawberry.
- Taxon
- Strawberry plantsFragaria ×ananassae0
- Treatment
- phosphorus and nitrogen deficiencye3
- Outcome
- rate of cell productione3
- Direction
- markedly reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry plants were grown in conditions producing moderate or severe deficiencies of phosphorus and nitrogen”
e3“The rate of cell production was markedly reduced by phosphorus and nitrogen deficiency”
Claim · model-written summary
Nutritional status had no effect on strawberry cell number or cell size before leaf emergence.
- Taxon
- Strawberry plantsFragaria ×ananassae0
- Treatment
- nutritionale4
- Outcome
- cell number or cell sizee4
- Direction
- no nutritional effecte4
- Qualifier
- before leaf emergencee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry plants were grown in conditions producing moderate or severe deficiencies of phosphorus and nitrogen”
e4“There was no nutritional effect on cell number or cell size before leaf emergence”
Claim · model-written summary
The effect of P and N deficiency on potential fruit yield of strawberry was attributed to inhibited branch crown proliferation and fewer flower initiation sites.
- Taxon
- Strawberry plantsFragaria ×ananassae0
- Treatment
- phosphorus and nitrogen deficiencye5
- Outcome
- potential fruit yielde5
- Qualifier
- inhibition of branch crown proliferatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry plants were grown in conditions producing moderate or severe deficiencies of phosphorus and nitrogen”
e5“The effect of phosphorus and nitrogen deficiency on potential fruit yield was confined to the inhibition of branch crown proliferation and the lack of available sites for flower initiation”
Claim · model-written summary
Nutrient level had no effect on the number of flowers initiated on each strawberry apical meristem.
- Taxon
- Strawberry plantsFragaria ×ananassae0
- Treatment
- nutrient levele6
- Outcome
- number of flowers initiated on each apical meristeme6
- Direction
- no effecte6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry plants were grown in conditions producing moderate or severe deficiencies of phosphorus and nitrogen”
e6“There was no effect of nutrient level on the number of flowers initiated on each apical meristem”
Claim · model-written summary
Nutrient management for strawberry fruit yield should focus on increasing branch crown formation.
- Taxon
- Strawberry plantsFragaria ×ananassae0
- Treatment
- manipulation of nutrient statuse7
- Outcome
- increasing branch crown formatione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry plants were grown in conditions producing moderate or severe deficiencies of phosphorus and nitrogen”
e7“Results suggest that any manipulation of nutrient status aimed at increasing fruit yields should be predominantly concerned with increasing branch crown formation”
The same questions in other papers
phosphorus · yield · Fragaria x ananassa (strawberry)Results differ
11 papers in the same direction as this paper · 3 in the opposite direction
- negative
- no effect
- negative
11 papers more in this group
See all 15 papers →nitrogen · yield · Fragaria x ananassa (strawberry)Results differ
47 papers in the same direction as this paper · 12 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- no effect
- negative
56 papers more in this group
See all 60 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.