Abstract
SUMMARY When soil was maintained at a mean water potential (Slatyer & Taylor, 1960) of the order of ‐80 J kg ‐1 at 25 cm depth throughout the growing period, much infection of potato tubers by Streptomyces scabies occurred, but when soil was irrigated to maintain it at potentials greater than ‐ 13 J kg ‐1 at 10 cm depth infection was negligible. Until about 5 weeks after initiation, tubers were very susceptible to infection; irrigation during this period reduced scab considerably, but subsequent irrigation reduced it only slightly. At the low water potential, actinomycete populations on lenticels were high and bacterial populations low; these effects were reversed at the high water potential. Since also actinomycetes were more frequently isolated in the absence than in the presence of bacteria it was deduced that there was an interaction between these two groups. It is suggested that irrigation may decrease the population of S. scabies in tuber lenticels by increasing populations of bacteria antagonistic to it.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Much potato tuber infection occurred at a mean soil water potential of about ‐80 J kg ‐1, whereas infection was negligible under irrigation maintaining potentials greater than ‐ 13 J kg ‐1.
- Taxon
- potato
Solanum tuberosume0 - Organ / stage
- tuberse0
- Treatment
- soil was irrigated to maintain it at potentials greater than ‐ 13 J kg ‐1e0
- Interactor
- Streptomyces scabiesStreptomyces scabieie0pathogen
- Outcome
- infection of potato tuberse0
- Direction
- negligiblee0
- Qualifier
- of the order of ‐80 J kg ‐1 at 25 cm depth throughout the growing periode0
- Comparator
- soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When soil was maintained at a mean water potential (Slatyer & Taylor, 1960) of the order of ‐80 J kg ‐1 at 25 cm depth throughout the growing period, much infection of potato tubers by Streptomyces scabies occurred, but when soil was irrigated to maintain it at potentials greater than ‐ 13 J kg ‐1 at 10 cm depth infection was negligible.”
Claim · model-written summary
Potato tubers were very susceptible to infection until about five weeks after initiation.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuberse0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- very susceptible to infectione0
- Qualifier
- Until about 5 weeks after initiatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Until about 5 weeks after initiation, tubers were very susceptible to infection”
t0“potato tubers by Streptomyces scabies”
Claim · model-written summary
Irrigation during the early susceptible period considerably reduced potato scab.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- irrigation during this periode0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- scabe0
- Direction
- reducede0
- Qualifier
- Until about 5 weeks after initiatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Until about 5 weeks after initiation, tubers were very susceptible to infection; irrigation during this period reduced scab considerably, but subsequent irrigation reduced it only slightly.”
t0“potato tubers by Streptomyces scabies”
Claim · model-written summary
Later irrigation reduced potato scab only slightly.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- subsequent irrigatione0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- scabe0
- Direction
- reducede0
- Qualifier
- only slightlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation during this period reduced scab considerably, but subsequent irrigation reduced it only slightly.”
t0“potato tubers by Streptomyces scabies”
Claim · model-written summary
Actinomycete populations on lenticels were high at low water potential and the effect reversed at high water potential.
- Taxon
- actinomycetee0
- Organ / stage
- lenticelse0
- Treatment
- low water potentiale0
- Interactor
- potatoSolanum tuberosumt0host
- Outcome
- actinomycete populations on lenticelse0
- Direction
- highe0
- Comparator
- high water potentiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the low water potential, actinomycete populations on lenticels were high and bacterial populations low; these effects were reversed at the high water potential.”
t0“potato tubers”
Claim · model-written summary
Bacterial populations were low at low water potential and the effect reversed at high water potential.
- Taxon
- bacteriale0
- Organ / stage
- lenticelse0
- Treatment
- low water potentiale0
- Interactor
- potatoSolanum tuberosumt0host
- Outcome
- bacterial populationse0
- Direction
- lowe0
- Comparator
- high water potentiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the low water potential, actinomycete populations on lenticels were high and bacterial populations low; these effects were reversed at the high water potential.”
t0“potato tubers”
Claim · model-written summary
Actinomycetes were isolated more frequently without bacteria than with them.
- Taxon
- actinomycetesActinomycetese0
- Outcome
- isolatede0
- Direction
- more frequentlye0
- Comparator
- presence of bacteriae0
Verbatim
e0“actinomycetes were more frequently isolated in the absence than in the presence of bacteria”
Claim · model-written summary
The authors deduced an interaction between actinomycetes and bacteria.
- Taxon
- actinomycetesActinomycetese0
- Outcome
- interaction between these two groupse0
Verbatim
e0“Since also actinomycetes were more frequently isolated in the absence than in the presence of bacteria it was deduced that there was an interaction between these two groups.”
Claim · model-written summary
Irrigation may decrease S. scabies populations in tuber lenticels by increasing antagonistic bacterial populations.
- Taxon
- S. scabiesStreptomyces scabieie0
- Organ / stage
- tuber lenticelse0
- Treatment
- irrigatione0
- Second interactor
- potatoSolanum tuberosumt0host
- Outcome
- population of S. scabiese0
- Direction
- decreasee0
- Qualifier
- by increasing populations of bacteria antagonistic to ite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that irrigation may decrease the population of S. scabies in tuber lenticels by increasing populations of bacteria antagonistic to it.”
t0“potato tubers”
The same questions in other papers
irrigation · Streptomyces scabiei · Solanum tuberosum (potato)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.