Abstract
summary The increase in potential nutrient‐absorbing surface area of loblolly pine ( Pinus taeda L.) seedlings as a result of ectomycorrhizal development was quantified. In one experimental. In one experiment, loblolly pine seedlings were inoculated with Pisolithus tinctorius Pers. Coker (Pt) after having first been grown from seed for 8 wk under a low phosphorus (P) nutrient regime. Eight weeks following inoculation, seedlings were harvested and ail components of the nutrient absorbing system (including the fungal mycelium) were quantified. External mycelium accounted for only 5% of the potential absorbing‐system dry weight, but this mycelium comprised 75% of the potential absorbing system area and over 99% of the absorbing length. In a second experiment, the P uptake and contribution to potential absorbing surface of Pt was compared to Cenococcum geophilum Fr. (Cg). Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P. (ii) had a higher frequency of fine‐root branching, (iii) developed an extensive network of rhizomorphs, and (iv) had over 1.5 times the mycelial absorbing surface area and over 3 times the mycelial length of Cg. We conclude that for both Pt and Cg inoculated plants, external mycelium made by far the greatest contribution to the overall potential absorbing surface area of the pine seedling. Differences in total mycelial surface area and mycelial length may account for differences in P uptake between seedlings inoculated with Pt and those inoculated with Cg.
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Claims 10
Claim · model-written summary
External mycelium made up 5% of absorbing-system dry weight.
PinusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“External mycelium accounted for only 5% of the potential absorbing‐system dry weight”
t0“pine”
e1“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
Claim · model-written summary
External mycelium comprised 75% of potential absorbing system area.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this mycelium comprised 75% of the potential absorbing system area”
t0“pine”
e1“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
Claim · model-written summary
External mycelium comprised over 99% of absorbing length.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“over 99% of the absorbing length”
t0“pine”
e1“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
Claim · model-written summary
Pt-inoculated seedlings absorbed almost twice the phosphorus of Cg-inoculated seedlings.
- Treatment
- inoculated with Pte0
- Interactor
- Pte0symbiont
- Second interactor
- Cge0symbiont
- Outcome
- Pe0
- Direction
- almost twicee0
- Value
- almost twicee0
- Comparator
- inoculated with Cge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
t0“pine”
e1“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
Claim · model-written summary
Pt-inoculated seedlings had more fine-root branching than Cg-inoculated seedlings.
- Treatment
- inoculated with Pte0
- Outcome
- frequency of fine‐root branchinge0
- Direction
- highere0
- Comparator
- inoculated with Cge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P. (ii) had a higher frequency of fine‐root branching”
t0“pine”
e1“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
Claim · model-written summary
Pt-inoculated seedlings developed extensive rhizomorph networks.
- Outcome
- extensive network of rhizomorphse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“developed an extensive network of rhizomorphs”
t0“pine”
e1“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
Claim · model-written summary
Pt-inoculated seedlings had over 1.5 times the mycelial absorbing surface area of Cg seedlings.
- Treatment
- Pte1
- Outcome
- mycelial absorbing surface areae0
- Direction
- over 1.5 timese0
- Value
- over 1.5 timese0
- Comparator
- Cge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“had over 1.5 times the mycelial absorbing surface area and over 3 times the mycelial length of Cg”
t0“pine”
e1“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
Claim · model-written summary
Pt-inoculated seedlings had over three times the mycelial length of Cg seedlings.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“over 3 times the mycelial length of Cg”
t0“pine”
e1“Seedlings inoculated with Pt differed from those inoculated with Cg in that they (i) absorbed almost twice the P”
Claim · model-written summary
The authors conclude that external mycelium contributed most of the potential absorbing surface area for both fungi.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for both Pt and Cg inoculated plants, external mycelium made by far the greatest contribution to the overall potential absorbing surface area of the pine seedling”
Claim · model-written summary
The authors suggest differences in mycelial surface and length may explain phosphorus uptake differences.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in total mycelial surface area and mycelial length may account for differences in P uptake between seedlings inoculated with Pt and those inoculated with Cg”
t0“pine”
The same questions in other papers
inoculation · growth · PinusPositive and negative results
14 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
13 papers more in this group
See all 17 papers →inoculation · nutrient: content · PinusResults agree
2 papers in the same direction as this paper
- positive
- 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.