Abstract
Abstract Many forest soils are potassium (K) deficient, and Suillus species are common fungi in boreal pine forests that form ectomycorrhizal associations with trees. To select the ideal ectomycorrhizal fungi for improving the growth and K nutrition of trees in natural and artificial forests, the growth, oxalate efflux, K absorption and soil K depletion by 13 Suillus isolates were compared in pure liquid culture using soil as the sole K source. The growth of mycorrhizal Pinus massoniana Lamb. seedlings and the K extraction through extramatrical mycelia extending from the root surfaces were studied. The results showed that the tested Suillus species varied in growth rate and in the extraction of unavailable K from the soil. Their oxalate efflux may lead to the decomposition of K‐bearing minerals and K release. The plants grown with added mycorrhizal fungi had higher biomass and extracted more K, particularly mineral structural K (HF‐HClO 4 digestible K), from the soil through the extramatrical mycelia than the seedlings grown without added mycorrhizal fungi. There was a positive correlation in K uptake between fungi grown in vitro and plants grown with mycorrhizae ( R 2 = 0.717, n = 8, p < .01). Therefore, in vivo tests on ectomycorrhizal fungal isolates can be used as a proxy to study the patterns and mechanisms of K extraction from the soil by extramatrical mycelia. Fungal K uptake in vitro could be one of the important indexes in the selection of Suillus for improving the growth and K nutrition of P. massoniana trees. Highlights Suillus isolates varied in their ability to extract unavailable K from soil. Oxalate was vital to the degradation of K minerals in soil by Suillus isolates. Pine seedlings with added mycorrhizal fungi from genus Suillus had larger biomass and K uptake than their non‐mycorrhizal counterparts. Suillus isolates showed similar patterns in K uptake in vitro and when forming mycorrhiza.
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Claims 6
Claim · model-written summary
Suillus species varied in growth rate and extraction of unavailable soil potassium.
- Taxon
- Pinus massoniana Lamb.
Pinus massonianat0 - Outcome
- Suillus species varied in growth rate and in the extraction of unavailable Ke0
_Singer.jpg?width=60){kind=small}
SuillusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
_Singer.jpg?width=500)
Verbatim
e0“the tested Suillus species varied in growth rate and in the extraction of unavailable K from the soil”
t0“Pinus massoniana Lamb.”
Claim · model-written summary
Suillus oxalate efflux may decompose potassium minerals and release potassium.
- Taxon
- Pinus massoniana Lamb.Pinus massonianat0
- Compound
- oxalatee0
- Outcome
- decomposition of K‐bearing minerals and K releasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Their oxalate efflux may lead to the decomposition of K‐bearing minerals and K release”
t0“Pinus massoniana Lamb.”
t1“Suillus”
Claim · model-written summary
Seedlings with added mycorrhizal fungi had higher biomass than seedlings without them.
- Taxon
- Pinus massoniana Lamb.Pinus massonianat0
- Treatment
- added mycorrhizal fungie0
- Interactor
- mycorrhizal fungie0symbiont
- Outcome
- biomasse0
- Direction
- highere0
- Comparator
- seedlings grown without added mycorrhizal fungie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants grown with added mycorrhizal fungi had higher biomass and extracted more K, particularly mineral structural K (HF‐HClO 4 digestible K), from the soil through the extramatrical mycelia than the seedlings grown without added mycorrhizal fungi”
t0“Pinus massoniana Lamb.”
Claim · model-written summary
Seedlings with added mycorrhizal fungi extracted more potassium from soil.
- Taxon
- Pinus massoniana Lamb.Pinus massonianat0
- Treatment
- added mycorrhizal fungie0
- Interactor
- mycorrhizal fungie0symbiont
- Outcome
- K, particularly mineral structural K (HF‐HClO 4 digestible K)e0
- Direction
- moree0
- Comparator
- seedlings grown without added mycorrhizal fungie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants grown with added mycorrhizal fungi had higher biomass and extracted more K, particularly mineral structural K (HF‐HClO 4 digestible K), from the soil through the extramatrical mycelia than the seedlings grown without added mycorrhizal fungi”
t0“Pinus massoniana Lamb.”
Claim · model-written summary
Fungal potassium uptake in vitro was positively correlated with plant potassium uptake with mycorrhizae.
- Taxon
- Pinus massoniana Lamb.Pinus massonianat0
- Outcome
- K uptakee0
- Direction
- positive correlatione0
- Value
- R 2 = 0.717e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a positive correlation in K uptake between fungi grown in vitro and plants grown with mycorrhizae ( R 2 = 0.717, n = 8, p < .01)”
t0“Pinus massoniana Lamb.”
Claim · model-written summary
The authors propose fungal potassium uptake in vitro as a selection index for improving tree growth and potassium nutrition.
- Taxon
- P. massonianaPinus massonianae0
- Outcome
- selection of Suillus for improving the growth and K nutritione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungal K uptake in vitro could be one of the important indexes in the selection of Suillus for improving the growth and K nutrition of P. massoniana trees”
The same questions in other papers
mycorrhiza · growth · Pinus massoniana (Chinese red pine)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.