Abstract
The effect of 700 μmol CO 2 mol −1 , 200 nmol ozone mol −1 and a combination of the two on carbon allocation was examined in Pinus halepensis co‐cultured with Betula pendula in symbiosis with the ectomycorrhizal fungus Paxillus involutus . The results show that under low nutrient and ozone levels, elevated CO 2 has no effect on the growth of B. pendula or P. halepensis seedlings nor on net carbon partitioning between plant parts. Elevated CO 2 did not enhance the growth of the fungus in symbiosis with the birch. On the other hand, ozone had a strong negative effect on the growth of the birch, which corresponded with the significantly reduced growth rates of the fungus. Exposure to elevated CO 2 did not ameliorate the negative effects of ozone on birch; in contrast, it acted as an additional stress factor. Neither ozone nor CO 2 had significant effects on biomass accumulation in the pine seedlings. Ozone stimulated the spread of mycorrhizal infection from the birch seedlings to neighbouring pines and had no statistically significant effects on phosphoenolpyruvate carboxylase (PEPC) or ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco) activity in the pine needles or on PEPC activity in pine roots.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Elevated CO2 had no effect on the growth of Betula pendula or Pinus halepensis seedlings under low nutrient and ozone levels.
- Taxon
- B. pendula or P. halepensis
Betula pendula
Pinus halepensise0 - Treatment
- elevated CO2e0
- Outcome
- growthe0
- Direction
- no effecte0
- Qualifier
- under low nutrient and ozone levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results show that under low nutrient and ozone levels, elevated CO2 has no effect on the growth of B. pendula or P. halepensis seedlings nor on net carbon partitioning between plant parts”
Claim · model-written summary
Elevated CO2 had no effect on net carbon partitioning between plant parts of the seedlings.
- Taxon
- B. pendula or P. halepensisBetula pendulaPinus halepensise0
- Treatment
- elevated CO2e0
- Outcome
- net carbon partitioning between plant partse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results show that under low nutrient and ozone levels, elevated CO2 has no effect on the growth of B. pendula or P. halepensis seedlings nor on net carbon partitioning between plant parts”
Claim · model-written summary
Elevated CO2 did not enhance the growth of the Paxillus involutus fungus in symbiosis with birch.
- Taxon
- Betula pendulaBetula pendulae2
- Treatment
- Elevated CO 2e1
- Interactor
- Paxillus involutus
.jpg?width=60)
Paxillus involutuse2symbiont - Outcome
- growth of the funguse1
- Direction
- did not enhancee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Elevated CO 2 did not enhance the growth of the fungus in symbiosis with the birch”
e2“Betula pendula in symbiosis with the ectomycorrhizal fungus Paxillus involutus”
Claim · model-written summary
Ozone had a strong negative effect on the growth of birch.
- Taxon
- Betula pendulaBetula pendulae2
- Treatment
- ozonee3
- Outcome
- growth of the birche3
- Direction
- strong negative effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Betula pendula in symbiosis with the ectomycorrhizal fungus Paxillus involutus”
e3“On the other hand, ozone had a strong negative effect on the growth of the birch, which corresponded with the significantly reduced growth rates of the fungus”
Claim · model-written summary
Ozone significantly reduced the growth rates of the Paxillus involutus fungus in symbiosis with birch.
- Taxon
- Betula pendulaBetula pendulae2
- Treatment
- ozonee3
- Interactor
- Paxillus involutusPaxillus involutuse2symbiont
- Outcome
- growth rates of the funguse3
- Direction
- significantly reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Betula pendula in symbiosis with the ectomycorrhizal fungus Paxillus involutus”
e3“On the other hand, ozone had a strong negative effect on the growth of the birch, which corresponded with the significantly reduced growth rates of the fungus”
Claim · model-written summary
Elevated CO2 did not ameliorate the negative effects of ozone on birch and acted as an additional stress factor.
- Taxon
- Betula pendulaBetula pendulae2
- Treatment
- Exposure to elevated CO 2e4
- Outcome
- negative effects of ozone on birche4
- Direction
- did not amelioratee4
- Qualifier
- acted as an additional stress factore4
- Comparator
- ozonee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Betula pendula in symbiosis with the ectomycorrhizal fungus Paxillus involutus”
e4“Exposure to elevated CO 2 did not ameliorate the negative effects of ozone on birch; in contrast, it acted as an additional stress factor”
Claim · model-written summary
Ozone stimulated the spread of mycorrhizal infection from birch seedlings to neighbouring pines.
PinusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Ozone stimulated the spread of mycorrhizal infection from the birch seedlings to neighbouring pines”
Claim · model-written summary
Ozone had no statistically significant effect on PEPC activity in pine needles.
- Organ / stage
- pine needlese6
- Treatment
- Ozonee7
- Outcome
- phosphoenolpyruvate carboxylase (PEPC)e7
- Direction
- no statistically significant effectse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“in the pine needles or on PEPC activity in pine roots”
e7“Ozone stimulated the spread of mycorrhizal infection from the birch seedlings to neighbouring pines and had no statistically significant effects on phosphoenolpyruvate carboxylase (PEPC) or ribulose”
Claim · model-written summary
Neither ozone nor elevated CO2 had significant effects on biomass accumulation in pine seedlings.
- Treatment
- ozone nor CO 2e0
- Outcome
- biomass accumulation in the pine seedlingse0
- Direction
- Neither ozone nor CO 2 had significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither ozone nor CO 2 had significant effects on biomass accumulation in the pine seedlings”
The same questions in other papers
ozone · growth · PinusResults differ
2 papers in the same direction as this paper
- negative
- negative
co2 · growth · Pinus halepensis (Aleppo pine)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
co2 · growth · Betula pendula (white birch)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →co2 · growth · PinusPositive and negative results
3 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →co2 · molecular: metabolites · Betula pendula (white birch)Results agree
1 paper in the same direction as this paper
- negative
ozone · molecular: metabolites · PinusResults agree
1 paper in the same direction as this paper
- negative
ozone · growth · Betula pendula (white birch)Results agree
8 papers in the same direction as this paper
- negative
- negative
- negative
5 papers more in this group
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.