Abstract
An apparatus is described for the control of humidity, air speed and temperature around detached potato leaflets and whole plants. Leaflets and plants inoculated with Phytophthora infestans were incubated in air at 15°C. Abundant sporangia were formed in an air speed of 0.3 × 10 −3 m/s when the ambient humidity was 90–100% RH, but not at 85 or 80% RH. At air speeds of 5.5 × 10 −3 and 13.7 × 10 −3 m/s there were numerous sporangia at 100% RH, but not at 95–80% RH. The number of sporangia formed on leaflets kept in air flowing at 5.5 × 10 −3 m/s with alternating humidities of 80 and 100% RH each for 12 h per day was intermediate between numbers formed on leaflets incubated at each humidity continuously, and higher than numbers formed at a constant 90% RH. Removing leaflets from plants before inoculation did not affect the number of sporangia produced.
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Claims 7
Claim · model-written summary
At 0.3 × 10 −3 m/s, Phytophthora produced abundant sporangia at 90–100% RH.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- 90–100% RHe0
- Interactor
- Phytophthora infestans
Phytophthora infestanse1pathogen - Outcome
- Abundant sporangiae0
- Comparator
- 85 or 80% RHe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abundant sporangia were formed in an air speed of 0.3 × 10 −3 m/s when the ambient humidity was 90–100% RH, but not at 85 or 80% RH.”
t0“potato leaves”
e1“Phytophthora infestans”
Claim · model-written summary
At 0.3 × 10 −3 m/s, no abundant sporangia formed at 85% RH.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 85 or 80% RHe0
- Interactor
- Phytophthora infestansPhytophthora infestanse1pathogen
- Outcome
- Abundant sporangiae0
- Direction
- not at 85 or 80% RHe0
- Comparator
- 90–100% RHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abundant sporangia were formed in an air speed of 0.3 × 10 −3 m/s when the ambient humidity was 90–100% RH, but not at 85 or 80% RH.”
t0“potato leaves”
e1“Phytophthora infestans”
Claim · model-written summary
At 5.5 × 10 −3 m/s, Phytophthora made numerous sporangia at 100% RH, but not 95–80% RH.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 100% RHe0
- Interactor
- Phytophthora infestansPhytophthora infestanse1pathogen
- Outcome
- numerous sporangiae0
- Qualifier
- 5.5 × 10 −3e0
- Comparator
- 95–80% RHe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At air speeds of 5.5 × 10 −3 and 13.7 × 10 −3 m/s there were numerous sporangia at 100% RH, but not at 95–80% RH.”
t0“potato leaves”
e1“Phytophthora infestans”
Claim · model-written summary
At 13.7 × 10 −3 m/s, Phytophthora made numerous sporangia at 100% RH, but not 95–80% RH.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 100% RHe0
- Interactor
- Phytophthora infestansPhytophthora infestanse1pathogen
- Outcome
- numerous sporangiae0
- Qualifier
- 13.7 × 10 −3 m/se0
- Comparator
- 95–80% RHe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At air speeds of 5.5 × 10 −3 and 13.7 × 10 −3 m/s there were numerous sporangia at 100% RH, but not at 95–80% RH.”
t0“potato leaves”
e1“Phytophthora infestans”
Claim · model-written summary
Alternating 80% and 100% RH produced intermediate sporangium numbers relative to continuous humidity treatments.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- alternating humidities of 80 and 100% RH each for 12 h per daye0
- Interactor
- Phytophthora infestansPhytophthora infestanse1pathogen
- Outcome
- number of sporangiae0
- Direction
- intermediatee0
- Comparator
- each humidity continuouslye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of sporangia formed on leaflets kept in air flowing at 5.5 × 10 −3 m/s with alternating humidities of 80 and 100% RH each for 12 h per day was intermediate between numbers formed on leaflets incubated at each humidity continuously”
t0“potato leaves”
e1“Phytophthora infestans”
Claim · model-written summary
Alternating 80% and 100% RH yielded more sporangia than constant 90% RH.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- alternating humidities of 80 and 100% RH each for 12 h per daye1
- Interactor
- Phytophthora infestansPhytophthora infestanse3pathogen
- Outcome
- number of sporangiae2
- Direction
- highere0
- Comparator
- a constant 90% RHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher than numbers formed at a constant 90% RH”
e1“alternating humidities of 80 and 100% RH each for 12 h per day”
e2“The number of sporangia formed on leaflets”
t0“potato leaves”
e3“Phytophthora infestans”
Claim · model-written summary
Removing leaflets before inoculation did not affect sporangium number.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Removing leaflets from plants before inoculatione0
- Interactor
- Phytophthora infestansPhytophthora infestanse1pathogen
- Outcome
- number of sporangiae0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Removing leaflets from plants before inoculation did not affect the number of sporangia produced.”
t0“potato leaves”
e1“Phytophthora infestans”
The same questions in other papers
inoculation · Phytophthora infestans · Solanum tuberosum (potato)Positive and negative results
15 papers in the same direction as this paper · 24 in the opposite direction
- no effect
- positive
- positive
36 papers more in this group
See all 40 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.