Abstract
When bareroot Southern pine (Pinus) seedlings are lifted in the fall and placed in cold storage for more than one week, survival is generally lower than when seedlings are lifted and stored during the winter. The combination of root wounding at the time of lifting with the presence of Pythium in the soil, the cool, moist conditions in cold storage encourage Pythium growth that results in seedling mortality after outplanting. Loblolly pine (Pinus taeda L.) and slash pine (Pinus elliottii Engelm.) seedlings were inoculated with either Pythium dimorphum orPythium irregulare, cold stored for 3 weeks, and placed in a hydroponic system (aerated aquariums). Seedling Root growth potential (RGP was measured as the number, length, volume, surface area, and diameter of new roots and survival was recorded 4 months after outplanting. Both Pythium species reduced the number of new roots and root length, root surface area, and root volume in slash pine. P. irregulare reduced the number of new roots, root length, and root surface area andP. dimorphum reduced the number of new roots on loblolly pine. Although, P. irregulare lowered RGP, it did not reduce loblolly pine survival. In contrast, P. irregulare inoculation did reduce the survival of slash pine seedlings after outplanting. Key words: Pythium dimorphum, Pythium irregular, root collar diameter; bareroot.
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Claims 6
Claim · model-written summary
Both Pythium species reduced new root number, length, surface area and volume in slash pine.
- Taxon
- slash pine
.jpg?width=60)
Pinus elliottiie0 - Treatment
- Both Pythium speciese0
- Interactor
- Pythium dimorphumElongisporangium dimorphume1pathogen
- Second interactor
- Pythium irregulareGlobisporangium irregularee1pathogen
- Outcome
- number of new roots and root length, root surface area, and root volumee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Both Pythium species reduced the number of new roots and root length, root surface area, and root volume in slash pine.”
e1“Pythium dimorphum orPythium irregulare”
Claim · model-written summary
P. irregulare reduced new root number, length and surface area in loblolly pine.
- Taxon
- loblolly pine
Pinus taedae0 - Treatment
- P. irregularee0
- Interactor
- P. irregulareGlobisporangium irregularee0pathogen
- Outcome
- number of new roots, root length, and root surface areae0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. irregulare reduced the number of new roots, root length, and root surface area andP. dimorphum reduced the number of new roots on loblolly pine.”
Claim · model-written summary
P. dimorphum reduced new root number in loblolly pine.
- Taxon
- loblolly pinePinus taedae0
- Treatment
- P. dimorphume0
- Interactor
- P. dimorphumElongisporangium dimorphume0pathogen
- Outcome
- number of new rootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. dimorphum reduced the number of new roots on loblolly pine.”
Claim · model-written summary
P. irregulare lowered loblolly pine root growth potential.
- Taxon
- loblolly pinePinus taedae0
- Treatment
- P. irregularee0
- Interactor
- P. irregulareGlobisporangium irregularee0pathogen
- Outcome
- RGPe0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although, P. irregulare lowered RGP, it did not reduce loblolly pine survival.”
Claim · model-written summary
P. irregulare did not reduce loblolly pine survival.
- Taxon
- loblolly pinePinus taedae0
- Treatment
- P. irregularee0
- Interactor
- P. irregulareGlobisporangium irregularee0pathogen
- Outcome
- loblolly pine survivale0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although, P. irregulare lowered RGP, it did not reduce loblolly pine survival.”
Claim · model-written summary
P. irregulare inoculation reduced slash pine survival after outplanting.
- Taxon
- slash pinePinus elliottiie0
- Treatment
- P. irregulare inoculatione0
- Interactor
- P. irregulareGlobisporangium irregularee0pathogen
- Outcome
- survival of slash pine seedlingse0
- Direction
- reducee0
- Qualifier
- after outplantinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. irregulare inoculation did reduce the survival of slash pine seedlings after outplanting.”
The same questions in other papers
Globisporangium irregulare · survival · Pinus elliottii (slash pine)Results differ
1 paper in the same direction as this paper
- no effect
inoculation · survival · Pinus elliottii (slash pine)Positive and negative results
1 in the opposite direction
- positive
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.