Abstract
Fertilizer treatments that greatly influenced the growth of tobacco and potato plants in pots had little effect on the number that became infected with potato virus Y when the plants were colonized by equal numbers of infective aphids, though the number was slightly decreased by nitrogen and increased by phosphorus. The number of local lesions produced on leaves of tobacco and Nicotiana glutinosa by tomato aucuba mosaic and tobacco mosaic viruses was increased by additions of both nitrogen and phosphorus, provided that these also increased growth. The predominant effect of both nutrients in increasing susceptibility was indirect by increasing plant size, but over certain critical ranges both elements also increased the numbers of lesions produced per unit leaf area. Conditions of maximum susceptibility approximated closely to those producing optimal growth, and susceptibility, whether measured by lesions per half‐leaf or per unit area, was decreased by a deficiency or excess of either element. Sometimes the addition of nitrogen reduced susceptibility when still increasing plant growth.
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Claims 15
Claim · model-written summary
Fertilizer strongly influenced tobacco growth in pots but had little effect on potato virus Y infection.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- Fertilizer treatmentse0
- Interactor
- potato virus Y
Potato virus Ye0pathogen - Second interactor
- aphidsAphidomorphae0pest
- Outcome
- number that became infectede0
- Direction
- little effecte0
- Setting
- potse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer treatments that greatly influenced the growth of tobacco and potato plants in pots had little effect on the number that became infected with potato virus Y when the plants were colonized by equal numbers of infective aphids”
Claim · model-written summary
Fertilizer strongly influenced potato growth in pots but had little effect on potato virus Y infection.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- Fertilizer treatmentse0
- Interactor
- potato virus YPotato virus Ye0pathogen
- Second interactor
- aphidsAphidomorphae0pest
- Outcome
- number that became infectede0
- Direction
- little effecte0
- Setting
- potse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer treatments that greatly influenced the growth of tobacco and potato plants in pots had little effect on the number that became infected with potato virus Y when the plants were colonized by equal numbers of infective aphids”
Claim · model-written summary
Nitrogen slightly decreased tobacco infection numbers.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- nitrogene0
- Interactor
- potato virus YPotato virus Ye1pathogen
- Outcome
- number that became infectede1
- Direction
- slightly decreasede0
- Setting
- potse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“though the number was slightly decreased by nitrogen and increased by phosphorus.”
e1“tobacco and potato plants in pots had little effect on the number that became infected with potato virus Y”
Claim · model-written summary
Nitrogen slightly decreased potato infection numbers.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- nitrogene0
- Interactor
- potato virus YPotato virus Ye1pathogen
- Outcome
- number that became infectede1
- Direction
- slightly decreasede0
- Setting
- potse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“though the number was slightly decreased by nitrogen and increased by phosphorus.”
e1“tobacco and potato plants in pots had little effect on the number that became infected with potato virus Y”
Claim · model-written summary
Phosphorus increased tobacco infection numbers.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- phosphoruse0
- Interactor
- potato virus YPotato virus Ye1pathogen
- Outcome
- number that became infectede1
- Direction
- increasede0
- Setting
- potse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“though the number was slightly decreased by nitrogen and increased by phosphorus.”
e1“tobacco and potato plants in pots had little effect on the number that became infected with potato virus Y”
Claim · model-written summary
Phosphorus increased potato infection numbers.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- phosphoruse0
- Interactor
- potato virus YPotato virus Ye1pathogen
- Outcome
- number that became infectede1
- Direction
- increasede0
- Setting
- potse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“though the number was slightly decreased by nitrogen and increased by phosphorus.”
e1“tobacco and potato plants in pots had little effect on the number that became infected with potato virus Y”
Claim · model-written summary
Nitrogen increased tobacco local lesions when it also increased growth.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- leavese0
- Treatment
- nitrogene0
- Interactor
- tomato aucuba mosaice0pathogen
- Second interactor
- tobacco mosaic viruses
Tobacco mosaic viruse0pathogen - Outcome
- number of local lesionse0
- Direction
- increasede0
- Qualifier
- provided that these also increased growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of local lesions produced on leaves of tobacco and Nicotiana glutinosa by tomato aucuba mosaic and tobacco mosaic viruses was increased by additions of both nitrogen and phosphorus, provided that these also increased growth.”
Claim · model-written summary
Phosphorus increased tobacco local lesions when it also increased growth.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- leavese0
- Treatment
- phosphoruse0
- Interactor
- tomato aucuba mosaice0pathogen
- Second interactor
- tobacco mosaic virusesTobacco mosaic viruse0pathogen
- Outcome
- number of local lesionse0
- Direction
- increasede0
- Qualifier
- provided that these also increased growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of local lesions produced on leaves of tobacco and Nicotiana glutinosa by tomato aucuba mosaic and tobacco mosaic viruses was increased by additions of both nitrogen and phosphorus, provided that these also increased growth.”
Claim · model-written summary
Nitrogen increased Nicotiana glutinosa local lesions when it also increased growth.
- Taxon
- Nicotiana glutinosa
Nicotiana glutinosae0 - Organ / stage
- leavese0
- Treatment
- nitrogene0
- Interactor
- tomato aucuba mosaice0pathogen
- Second interactor
- tobacco mosaic virusesTobacco mosaic viruse0pathogen
- Outcome
- number of local lesionse0
- Direction
- increasede0
- Qualifier
- provided that these also increased growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of local lesions produced on leaves of tobacco and Nicotiana glutinosa by tomato aucuba mosaic and tobacco mosaic viruses was increased by additions of both nitrogen and phosphorus, provided that these also increased growth.”
Claim · model-written summary
Phosphorus increased Nicotiana glutinosa local lesions when it also increased growth.
- Taxon
- Nicotiana glutinosaNicotiana glutinosae0
- Treatment
- phosphoruse0
- Interactor
- tomato aucuba mosaice0pathogen
- Second interactor
- tobacco mosaic virusesTobacco mosaic viruse0pathogen
- Outcome
- number of local lesionse0
- Direction
- increasede0
- Qualifier
- provided that these also increased growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of local lesions produced on leaves of tobacco and Nicotiana glutinosa by tomato aucuba mosaic and tobacco mosaic viruses was increased by additions of both nitrogen and phosphorus, provided that these also increased growth.”
Claim · model-written summary
Nutrient driven susceptibility was predominantly mediated by increased plant size.
- Taxon
- tobaccoNicotiana tabacume1
- Outcome
- susceptibilitye0
- Qualifier
- increasing plant sizee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The predominant effect of both nutrients in increasing susceptibility was indirect by increasing plant size”
e1“growth of tobacco and potato plants”
Claim · model-written summary
Both elements increased lesions per unit leaf area over critical ranges.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- both nitrogen and phosphoruse2
- Outcome
- numbers of lesions produced per unit leaf areae0
- Direction
- increasede0
- Qualifier
- over certain critical rangese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“over certain critical ranges both elements also increased the numbers of lesions produced per unit leaf area.”
e1“growth of tobacco and potato plants”
e2“both nitrogen and phosphorus”
Claim · model-written summary
Maximum susceptibility approximated optimal growth conditions.
- Taxon
- tobaccoNicotiana tabacume1
- Outcome
- susceptibilitye0
- Direction
- maximume0
- Comparator
- optimal growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conditions of maximum susceptibility approximated closely to those producing optimal growth”
e1“growth of tobacco and potato plants”
Claim · model-written summary
Deficiency or excess of either nutrient decreased susceptibility.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- a deficiency or excess of either elemente0
- Outcome
- susceptibilitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“susceptibility, whether measured by lesions per half‐leaf or per unit area, was decreased by a deficiency or excess of either element.”
e1“growth of tobacco and potato plants”
Claim · model-written summary
Nitrogen sometimes reduced susceptibility while increasing growth.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- addition of nitrogene0
- Outcome
- susceptibilitye0
- Direction
- reducede0
- Qualifier
- when still increasing plant growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sometimes the addition of nitrogen reduced susceptibility when still increasing plant growth.”
e1“growth of tobacco and potato plants”
The same questions in other papers
nitrogen · Potato virus Y · Solanum tuberosum (potato)Positive and negative results
1 in the opposite direction
- no effect
phosphorus · disease · Nicotiana glutinosaPositive and negative results
1 in the opposite direction
- positive
phosphorus · disease · Nicotiana tabacum (tobacco)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
nitrogen · disease · Nicotiana tabacum (tobacco)Positive and negative results
6 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
10 papers more in this group
See all 14 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.