Abstract
BACKGROUND: In tightly closed human habitats such as space stations, locations near volcano vents and closed culture vessels, atmospheric CO(2) concentration may be 10 to 20 times greater than Earth's current ambient levels. It is known that super-elevated (SE) CO(2) (>1,200 µmol mol(-1)) induces physiological responses different from that of moderately elevated CO(2) (up to 1,200 µmol mol(-1)), but little is known about the molecular responses of plants to supra-optimal [CO(2)]. METHODOLOGY/PRINCIPAL FINDINGS: To understand the underlying molecular causes for differential physiological responses, metabolite and transcript profiles were analyzed in aerial tissue of Arabidopsis plants, which were grown under ambient atmospheric CO(2) (400 µmol mol(-1)), elevated CO(2) (1,200 µmol mol(-1)) and SE CO(2) (4,000 µmol mol(-1)), at two developmental stages early and late vegetative stage. Transcript and metabolite profiling revealed very different responses to elevated versus SE [CO(2)]. The transcript profiles of SE CO(2) treated plants were closer to that of the control. Development stage had a clear effect on plant molecular response to elevated and SE [CO(2)]. Photosynthetic acclimation in terms of down-regulation of photosynthetic gene expression was observed in response to elevated [CO(2)], but not that of SE [CO(2)] providing the first molecular evidence that there appears to be a fundamental disparity in the way plants respond to elevated and SE [CO(2)]. Although starch accumulation was induced by both elevated and SE [CO(2)], the increase was less at the late vegetative stage and accompanied by higher soluble sugar content suggesting an increased starch breakdown to meet sink strength resulting from the rapid growth demand. Furthermore, many of the elevated and SE CO(2)-responsive genes found in the present study are also regulated by plant hormone and stress. CONCLUSIONS/SIGNIFICANCE: This study provides new insights into plant acclimation to elevated and SE [CO(2)] during development and how this relates to stress, sugar and hormone signaling.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 8
Claim · model-written summary
Elevated CO2 (1,200 µmol mol(-1)) down-regulated photosynthetic gene expression in Arabidopsis compared with ambient CO2 (400 µmol mol(-1)).
- Taxon
- Arabidopsis
Arabidopsist0 - Treatment
- elevated [CO(2)]e3
- Outcome
- down-regulation of photosynthetic gene expressione3
- Direction
- down-regulatione3
- Comparator
- ambient atmospheric CO(2) (400 µmol mol(-1))e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Differential Physiological Responses of Arabidopsis to Optimal and Supraoptimal Atmospheric CO2”
e1“metabolite and transcript profiles were analyzed in aerial tissue of Arabidopsis plants, which were grown under ambient atmospheric CO(2) (400 µmol mol(-1)), elevated CO(2) (1,200 µmol mol(-1)) and SE CO(2) (4,000 µmol mol(-1)), at two developmental stages early and late vegetative stage”
e3“Photosynthetic acclimation in terms of down-regulation of photosynthetic gene expression was observed in response to elevated [CO(2)], but not that of SE [CO(2)]”
Claim · model-written summary
Supraoptimal CO2 (4,000 µmol mol(-1)) did not induce the down-regulation of photosynthetic gene expression seen under elevated CO2 in Arabidopsis.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- SE [CO(2)]e3
- Outcome
- down-regulation of photosynthetic gene expressione3
- Direction
- no_changeinferrede3
- Comparator
- ambient atmospheric CO(2) (400 µmol mol(-1))e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Differential Physiological Responses of Arabidopsis to Optimal and Supraoptimal Atmospheric CO2”
e1“metabolite and transcript profiles were analyzed in aerial tissue of Arabidopsis plants, which were grown under ambient atmospheric CO(2) (400 µmol mol(-1)), elevated CO(2) (1,200 µmol mol(-1)) and SE CO(2) (4,000 µmol mol(-1)), at two developmental stages early and late vegetative stage”
e3“Photosynthetic acclimation in terms of down-regulation of photosynthetic gene expression was observed in response to elevated [CO(2)], but not that of SE [CO(2)]”
Claim · model-written summary
Elevated CO2 induced starch accumulation in Arabidopsis compared with ambient CO2.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- elevatede4
- Outcome
- starch accumulatione4
- Direction
- inducede4
- Comparator
- ambient atmospheric CO(2) (400 µmol mol(-1))e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Differential Physiological Responses of Arabidopsis to Optimal and Supraoptimal Atmospheric CO2”
e1“metabolite and transcript profiles were analyzed in aerial tissue of Arabidopsis plants, which were grown under ambient atmospheric CO(2) (400 µmol mol(-1)), elevated CO(2) (1,200 µmol mol(-1)) and SE CO(2) (4,000 µmol mol(-1)), at two developmental stages early and late vegetative stage”
e4“Although starch accumulation was induced by both elevated and SE [CO(2)], the increase was less at the late vegetative stage and accompanied by higher soluble sugar content”
Claim · model-written summary
Supraoptimal CO2 induced starch accumulation in Arabidopsis compared with ambient CO2.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- SE [CO(2)]e4
- Outcome
- starch accumulatione4
- Direction
- inducede4
- Comparator
- ambient atmospheric CO(2) (400 µmol mol(-1))e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Differential Physiological Responses of Arabidopsis to Optimal and Supraoptimal Atmospheric CO2”
e1“metabolite and transcript profiles were analyzed in aerial tissue of Arabidopsis plants, which were grown under ambient atmospheric CO(2) (400 µmol mol(-1)), elevated CO(2) (1,200 µmol mol(-1)) and SE CO(2) (4,000 µmol mol(-1)), at two developmental stages early and late vegetative stage”
e4“Although starch accumulation was induced by both elevated and SE [CO(2)], the increase was less at the late vegetative stage and accompanied by higher soluble sugar content”
Claim · model-written summary
The increase in starch accumulation was smaller at the late vegetative stage than at the early stage in Arabidopsis under elevated and supraoptimal CO2.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- late vegetative stagee4
- Outcome
- starch accumulatione4
- Direction
- lesse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Differential Physiological Responses of Arabidopsis to Optimal and Supraoptimal Atmospheric CO2”
e4“Although starch accumulation was induced by both elevated and SE [CO(2)], the increase was less at the late vegetative stage and accompanied by higher soluble sugar content”
Claim · model-written summary
Soluble sugar content was higher at the late vegetative stage in Arabidopsis under elevated and supraoptimal CO2.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- late vegetative stagee4
- Outcome
- soluble sugar contente4
- Direction
- highere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Differential Physiological Responses of Arabidopsis to Optimal and Supraoptimal Atmospheric CO2”
e4“Although starch accumulation was induced by both elevated and SE [CO(2)], the increase was less at the late vegetative stage and accompanied by higher soluble sugar content”
Claim · model-written summary
Transcript and metabolite profiling revealed very different responses of Arabidopsis to elevated versus supraoptimal CO2.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- elevated versus SE [CO(2)]e7
- Outcome
- very different responsese7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Differential Physiological Responses of Arabidopsis to Optimal and Supraoptimal Atmospheric CO2”
e7“Transcript and metabolite profiling revealed very different responses to elevated versus SE [CO(2)]”
Claim · model-written summary
Developmental stage had a clear effect on the molecular response of Arabidopsis to elevated and supraoptimal CO2.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- Development stagee6
- Outcome
- plant molecular responsee6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Differential Physiological Responses of Arabidopsis to Optimal and Supraoptimal Atmospheric CO2”
e6“Development stage had a clear effect on plant molecular response to elevated and SE [CO(2)]”
The same questions in other papers
co2 · molecular: expression · ArabidopsisPositive and negative results
2 papers in the same direction as this paper · 5 in the opposite direction
- negative
- positive
- positive
4 papers more in this group
See all 8 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.