Abstract
Abstract In this study, we investigated the impact of elevated atmospheric CO 2 (ambient + 350 μmol mol –1 ) on fine root production and respiration in Scots pine ( Pinus sylvestris L.) seedlings. After six months exposure to elevated CO 2 , root production measured by root in‐growth bags, showed significant increases in mean total root length and biomass, which were more than 100% greater compared to the ambient treatment. This increased root length may have lead to a more intensive soil exploration. Chemical analysis of the roots showed that the roots in the elevated treatment accumulated more starch and had a lower C/N‐ratio. Specific root respiration rates were significantly higher in the elevated treatment and this was probably attributed to increased nitrogen concentrations in the roots. Rhizospheric respiration and soil CO 2 efflux were also enhanced in the elevated treatment. These results clearly indicate that under elevated atmospheric CO 2 root production and development in Scots pine seedlings is altered and respiratory carbon losses through the root system are increased.
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Claims 7
Claim · model-written summary
Elevated CO2 increased root length by more than 100%.
- Taxon
- Scots pine
Pinus sylvestrist0 - Treatment
- elevated atmospheric CO 2t1
- Outcome
- mean total root lengthe0
- Direction
- increasese0
- Value
- more than 100%e0
- Comparator
- ambient treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increases in mean total root length and biomass, which were more than 100% greater compared to the ambient treatment”
t0“Scots pine”
t1“impact of elevated atmospheric CO 2 (ambient + 350 μmol mol –1 )”
Claim · model-written summary
Elevated CO2 increased root biomass by more than 100%.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- elevated atmospheric CO 2t1
- Outcome
- biomasse0
- Direction
- increasese0
- Value
- more than 100%e0
- Comparator
- ambient treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increases in mean total root length and biomass, which were more than 100% greater compared to the ambient treatment”
t0“Scots pine”
t1“impact of elevated atmospheric CO 2 (ambient + 350 μmol mol –1 )”
Claim · model-written summary
Elevated CO2 increased root starch.
- Taxon
- Scots pinePinus sylvestrist0
- Organ / stage
- rootse0
- Treatment
- elevated treatmente0
- Outcome
- starche0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the roots in the elevated treatment accumulated more starch”
t0“Scots pine”
Claim · model-written summary
Elevated CO2 lowered root C/N ratio.
- Taxon
- Scots pinePinus sylvestrist0
- Organ / stage
- rootse0
- Treatment
- elevated treatmente0
- Outcome
- C/N‐ratioe0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the roots in the elevated treatment accumulated more starch and had a lower C/N‐ratio”
t0“Scots pine”
Claim · model-written summary
Elevated CO2 increased specific root respiration.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- elevated treatmente0
- Outcome
- Specific root respiration ratese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Specific root respiration rates were significantly higher in the elevated treatment”
t0“Scots pine”
Claim · model-written summary
Elevated CO2 enhanced rhizospheric respiration.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- elevated treatmente0
- Outcome
- Rhizospheric respiratione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizospheric respiration and soil CO 2 efflux were also enhanced in the elevated treatment”
t0“Scots pine”
Claim · model-written summary
Elevated CO2 enhanced soil CO2 efflux.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- elevated treatmente0
- Outcome
- soil CO 2 effluxe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizospheric respiration and soil CO 2 efflux were also enhanced in the elevated treatment”
t0“Scots pine”
The same questions in other papers
co2 · growth · Pinus sylvestris (Scots pine)Positive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- positive
9 papers more in this group
See all 13 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.