Abstract
ABSTRACT In excised dormant stems of peach (Prunus persica), prune (Prunus domestica), and almond (Prunus dulcis), stem diameter, stem hydration, and freezing-thawing influenced the extent of infection caused by Pseudomonas syringae pv. syringae. Bacterial lesion length increased with increasing stem diameter, demonstrating the need to account for the effects of stem diameter when lesion length data are analyzed. Lesion length increased or decreased with stem hydration or dehydration, respectively. However, tissue water content was not a good indicator of tissue susceptibility to infection by P. syringae pv. syringae, as larger diameter stems had larger lesions and lower water content than did smaller diameter stems. After freezing at -5 degrees C for 12 to 24 h, inoculations made during the thawing process produced significantly larger lesions than did inoculations performed before freezing or after thawing. These results support the hypothesis that the increased susceptibility to bacterial canker that is associated with noninjurious freezing is a result of the increased passive spread of bacteria through water redistribution when inoculation is performed during the thawing process. Plant tissue water relationship characteristics that can influence water movement during freezing and thawing may be an important component of bacterial canker development in stone fruit trees.
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Claims 6
Claim · model-written summary
Bacterial lesion length increased with stem diameter in stone fruit stems.
- Taxon
- peach
Prunus persicae1 - Organ / stage
- steme0
- Interactor
- Pseudomonas syringae pv. syringae
Pseudomonas syringae pv. syringaee2pathogen - Outcome
- Bacterial lesion lengthe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial lesion length increased with increasing stem diameter”
e1“stems of peach (Prunus persica), prune (Prunus domestica), and almond (Prunus dulcis)”
e2“infection caused by Pseudomonas syringae pv. syringae”
Claim · model-written summary
Stem hydration increased lesion length.
- Taxon
- peachPrunus persicae1
- Treatment
- stem hydratione0
- Interactor
- Pseudomonas syringae pv. syringaePseudomonas syringae pv. syringaee2pathogen
- Outcome
- Lesion lengthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lesion length increased or decreased with stem hydration or dehydration, respectively”
e1“stems of peach (Prunus persica), prune (Prunus domestica), and almond (Prunus dulcis)”
e2“infection caused by Pseudomonas syringae pv. syringae”
Claim · model-written summary
Stem dehydration decreased lesion length.
- Taxon
- peachPrunus persicae1
- Treatment
- dehydratione0
- Interactor
- Pseudomonas syringae pv. syringaePseudomonas syringae pv. syringaee2pathogen
- Outcome
- Lesion lengthe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lesion length increased or decreased with stem hydration or dehydration, respectively”
e1“stems of peach (Prunus persica), prune (Prunus domestica), and almond (Prunus dulcis)”
e2“infection caused by Pseudomonas syringae pv. syringae”
Claim · model-written summary
Tissue water content did not reliably indicate susceptibility, because larger stems had larger lesions despite lower water content.
- Taxon
- peachPrunus persicae1
- Organ / stage
- stemse0
- Interactor
- P. syringae pv. syringaePseudomonas syringae pv. syringaee0pathogen
- Outcome
- tissue susceptibility to infection by P. syringae pv. syringaee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue water content was not a good indicator of tissue susceptibility to infection by P. syringae pv. syringae, as larger diameter stems had larger lesions and lower water content than did smaller diameter stems”
e1“stems of peach (Prunus persica), prune (Prunus domestica), and almond (Prunus dulcis)”
Claim · model-written summary
Inoculation during thawing after freezing at -5 degrees C gave significantly larger lesions than inoculation before freezing or after thawing.
- Taxon
- peachPrunus persicae1
- Treatment
- inoculations made during the thawing processe0
- Interactor
- Pseudomonas syringae pv. syringaePseudomonas syringae pv. syringaee2pathogen
- Outcome
- lesionse0
- Direction
- largere0
- Qualifier
- freezing at -5 degrees C for 12 to 24 he0
- Comparator
- inoculations performed before freezing or after thawinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After freezing at -5 degrees C for 12 to 24 h, inoculations made during the thawing process produced significantly larger lesions than did inoculations performed before freezing or after thawing”
e1“stems of peach (Prunus persica), prune (Prunus domestica), and almond (Prunus dulcis)”
e2“infection caused by Pseudomonas syringae pv. syringae”
Claim · model-written summary
The authors attribute greater susceptibility during thawing to passive bacterial spread through water redistribution.
Verbatim
e0“increased susceptibility to bacterial canker that is associated with noninjurious freezing is a result of the increased passive spread of bacteria through water redistribution when inoculation is performed during the thawing process”
e1“stone fruit trees”
The same questions in other papers
inoculation · Pseudomonas syringae pv. syringae · Prunus persica (peach)Results agree
1 paper in the same direction as this paper
- negative
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.