Abstract
A balsam poplar clone (Populus trichocarpa cv. Weser 6) was inoculated by two ectomycorrhizal strains (Laccaria bicolor MW 158 and Paxillus involutus 1444) in Kick-Brauckmann-pots. The substrates were two arable sandy soils (Cambisols) with different organic matter content and nutrient supply. One soil (WIL) was rich in organic matter (Corg = 1.6%) and total nitrogen (Nt = 0.14%), whereas the other soil (RIE) had low contents of Corg (0.8%) and Nt (0.08%). Leaf nutrient concentrations, shoot lengths, root and shoot biomass production and nitrogen accumulation in the biomass were determined to discover possible inoculation effects. Mycorrhization indices (% colonized fine roots) of 36% with Laccaria bicolor and 40% with Paxillus involutus were observed on the Corg rich soil (WIL) in contrast to 16% and 14% on the Corg poor soil (RIE), respectively. Inoculation of poplar on the soil WIL increased shoot length, biomass production, shoot:root ratio and total N uptake of the cuttings, whereas on the soil RIE only the shoot:root ratio increased and the N nutrition was improved. We conclude that interactions between soil and fungus should be tested when choosing ectomycorrhizal strains for inoculation. Wechselwirkung von Substraten und Ektomykorrhizen auf das Wachstum eines Pappelklons Ein Balsampappelklon (Populus trichocarpa cv. Weser 6) wurden in Kick-Brauckmann-Gefäßen mit zwei ektomykorrhizierenden Pilzstämmen (Laccaria bicolor MW 158 und Paxillus involutus 1444) beimpft. Als Substrate dienten zwei vormals landwirtschaftlich genutzte Sandböden. Der eine Boden (WIL) hatte einen Corg-Gehalt von 1,6% und einen Nt-Gehalt von 0,14%, wogegen der andere (RIE) nur einen Corg-Gehalt von 0,8% und einen Nt-Gehalt von 0,08% aufwies. Die Blattspiegelwerte, die Trieblängen, Trieb- und Wurzeltrockenmassen sowie die Gesamt-N-Gehalte der Phytomasse wurden ermittelt und auf Inokulationseffekte geprüft. Auf dem Boden WIL waren nach Inokulation mit Laccaria bicolor 36% und mit Paxillus involutus 40% der Feinstwurzeln ektomykorrhiziert, während auf dem Boden RIE nur 16% bzw. 14% der Feinstwurzeln ektomykorrhiziert waren. Die Inokulation auf dem Boden WIL bewirkte eine Steigerung der Trieblängen, der Biomasseproduktion und der Gesamt-N-Aufnahmen, während auf dem Boden RIE nur das Sproß:Wurzel-Verhältnis erhöht und die N-Ernährung verbessert wurden. Daraus ergibt sich die Schlußfolgerung, daß bei Inokulationen die Interaktionen zwischen Pilzstamm und Substrat Berücksichtigung bei der Wahl des Inokulationsstammes finden sollten.
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Claims 9
Claim · model-written summary
Laccaria bicolor colonized 36% of poplar fine roots on WIL soil.
- Taxon
- Populus trichocarpa
Populus trichocarpae1 - Material
- Weser 6e1
- Interactor
- Laccaria bicolor
_P.D._Orton_270921_crop.jpg?width=60)
Laccaria bicolore0symbiont - Outcome
- % colonized fine rootse0
- Value
- 36%e0
- Setting
- Corg rich soil (WIL)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_P.D._Orton_270921_crop.jpg?width=500)
Verbatim
e0“Mycorrhization indices (% colonized fine roots) of 36% with Laccaria bicolor and 40% with Paxillus involutus were observed on the Corg rich soil (WIL)”
e1“A balsam poplar clone (Populus trichocarpa cv. Weser 6)”
Claim · model-written summary
Paxillus involutus colonized 40% of poplar fine roots on WIL soil.
- Taxon
- Populus trichocarpaPopulus trichocarpae1
- Material
- Weser 6e1
- Interactor
- Paxillus involutus
.jpg?width=60)
Paxillus involutuse0symbiont - Outcome
- % colonized fine rootse0
- Value
- 40%e0
- Setting
- Corg rich soil (WIL)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Mycorrhization indices (% colonized fine roots) of 36% with Laccaria bicolor and 40% with Paxillus involutus were observed on the Corg rich soil (WIL)”
e1“A balsam poplar clone (Populus trichocarpa cv. Weser 6)”
Claim · model-written summary
Laccaria bicolor colonized 16% of poplar fine roots on RIE soil.
- Taxon
- Populus trichocarpaPopulus trichocarpae2
- Material
- Weser 6e2
- Interactor
- Laccaria bicolorLaccaria bicolore1symbiont
- Outcome
- % colonized fine rootse1
- Value
- 16%e0
- Setting
- Corg poor soil (RIE)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in contrast to 16% and 14% on the Corg poor soil (RIE), respectively”
e1“Mycorrhization indices (% colonized fine roots) of 36% with Laccaria bicolor and 40% with Paxillus involutus”
e2“A balsam poplar clone (Populus trichocarpa cv. Weser 6)”
Claim · model-written summary
Paxillus involutus colonized 14% of poplar fine roots on RIE soil.
- Taxon
- Populus trichocarpaPopulus trichocarpae2
- Material
- Weser 6e2
- Interactor
- Paxillus involutusPaxillus involutuse1symbiont
- Outcome
- % colonized fine rootse1
- Value
- 14%e0
- Setting
- Corg poor soil (RIE)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in contrast to 16% and 14% on the Corg poor soil (RIE), respectively”
e1“Mycorrhization indices (% colonized fine roots) of 36% with Laccaria bicolor and 40% with Paxillus involutus”
e2“A balsam poplar clone (Populus trichocarpa cv. Weser 6)”
Claim · model-written summary
Inoculation on WIL soil increased poplar shoot length, biomass production and shoot:root ratio.
- Treatment
- Inoculatione0
- Outcome
- shoot length, biomass production, shoot:root ratioe0
- Direction
- increasede0
- Setting
- soil WILe0
PopulusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of poplar on the soil WIL increased shoot length, biomass production, shoot:root ratio and total N uptake of the cuttings”
Claim · model-written summary
Inoculation on WIL soil increased total nitrogen uptake by poplar cuttings.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of poplar on the soil WIL increased shoot length, biomass production, shoot:root ratio and total N uptake of the cuttings”
Claim · model-written summary
Inoculation on RIE soil increased the poplar shoot:root ratio.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the soil RIE only the shoot:root ratio increased and the N nutrition was improved”
e1“Inoculation of poplar on the soil WIL”
Claim · model-written summary
Inoculation on RIE soil improved poplar nitrogen nutrition.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the soil RIE only the shoot:root ratio increased and the N nutrition was improved”
e1“Inoculation of poplar on the soil WIL”
Claim · model-written summary
The authors recommend testing soil–fungus interactions when selecting ectomycorrhizal strains for inoculation.
- Outcome
- interactions between soil and fungus should be testede0
- Qualifier
- when choosing ectomycorrhizal strains for inoculatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interactions between soil and fungus should be tested when choosing ectomycorrhizal strains for inoculation”
e1“Inoculation of poplar”
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See all 9 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.