Abstract
Phosphorus (P) nutrition is always a key issue regarding plants responses to elevated CO(2). Yet it is unclear of how elevated CO(2) affects P uptake under different nitrogen (N) forms. This study investigated the influence of elevated CO(2) (800 µl l(-1)) on P uptake and utilization by Arabidopsis grown in pH-buffered phosphate (P)-deficient (0.5 µM) hydroponic culture supplying with 2mM nitrate (NO(3)(-)) or ammonium (NH(4)(+)). After 7 d treatment, elevated CO(2) enhanced the biomass production of both NO(3)(-)- and NH(4) (+)-fed plants but decreased the P amount absorbed per weight of roots and the P concentration in the shoots of plants supplied with NH(4)(+). In comparison, elevated CO(2) increased the amount of P absorbed per weight of roots, as well as the P concentration in plants and alleviated P deficiency-induced symptoms of plants supplied with NO(3)(-). Elevated CO(2) also increased the root/shoot ratio, total root surface area, and acid phosphatase activity, and enhanced the expression of genes or transcriptional factors involving in P uptake, allocation and remobilization in P deficient plants. Furthermore, elevated CO(2) increased the nitric oxide (NO) level in roots of NO(3)(-)-fed plants but decreased it in NH(4)(+)-fed plants. NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO) inhibited plant P acquisition by roots under elevated CO(2). Considering all of these findings, this study concluded that a combination of elevated CO(2) and NO(3)(-) nutrition can induce a set of plant adaptive strategies to improve P status from P-deficient soluble sources and that NO may be a signalling molecule that controls these processes.
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Claims 12
Claim · model-written summary
Elevated CO2 enhanced biomass production of both nitrate- and ammonium-fed Arabidopsis.
- Taxon
- Arabidopsis
Arabidopsise0 - Treatment
- elevated CO(2)e1
- Outcome
- biomass productione1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) enhanced the biomass production of both NO(3)(-)- and NH(4) (+)-fed plants”
Claim · model-written summary
Elevated CO2 decreased the P amount absorbed per weight of roots and the shoot P concentration in ammonium-fed Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- elevated CO(2)e1
- Outcome
- the P amount absorbed per weight of roots and the P concentration in the shootse2
- Direction
- decreasede2
- Qualifier
- plants supplied with NH(4)(+)e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) enhanced the biomass production of both NO(3)(-)- and NH(4) (+)-fed plants”
e2“decreased the P amount absorbed per weight of roots and the P concentration in the shoots of plants supplied with NH(4)(+)”
Claim · model-written summary
Elevated CO2 increased the amount of P absorbed per weight of roots in nitrate-fed Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- elevated CO(2)e1
- Outcome
- amount of P absorbed per weight of rootse1
- Direction
- increasede1
- Qualifier
- plants supplied with NO(3)(-)e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) increased the amount of P absorbed per weight of roots, as well as the P concentration in plants”
e2“alleviated P deficiency-induced symptoms of plants supplied with NO(3)(-)”
Claim · model-written summary
Elevated CO2 increased the P concentration in nitrate-fed Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- elevated CO(2)e1
- Outcome
- the P concentration in plantse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) increased the amount of P absorbed per weight of roots, as well as the P concentration in plants”
Claim · model-written summary
Elevated CO2 alleviated P deficiency-induced symptoms in nitrate-fed Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- elevated CO(2)e1
- Outcome
- P deficiency-induced symptomse2
- Direction
- alleviatede2
- Qualifier
- plants supplied with NO(3)(-)e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) increased the amount of P absorbed per weight of roots, as well as the P concentration in plants”
e2“alleviated P deficiency-induced symptoms of plants supplied with NO(3)(-)”
Claim · model-written summary
Elevated CO2 increased the root/shoot ratio, total root surface area and acid phosphatase activity in Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- elevated CO(2)e1
- Outcome
- root/shoot ratio, total root surface area, and acid phosphatase activitye2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) enhanced the biomass production of both NO(3)(-)- and NH(4) (+)-fed plants”
e2“increased the root/shoot ratio, total root surface area, and acid phosphatase activity”
Claim · model-written summary
Elevated CO2 enhanced the expression of genes or transcriptional factors involved in P uptake, allocation and remobilization in P-deficient Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- elevated CO(2)e1
- Outcome
- expression of genes or transcriptional factors involving in P uptakee2
- Direction
- enhancede2
- Qualifier
- in P deficient plantse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) enhanced the biomass production of both NO(3)(-)- and NH(4) (+)-fed plants”
e2“enhanced the expression of genes or transcriptional factors involving in P uptake, allocation and remobilization in P deficient plants”
Claim · model-written summary
Elevated CO2 increased the nitric oxide (NO) level in roots of nitrate-fed Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- elevated CO(2)e1
- Outcome
- nitric oxide (NO) levele2
- Direction
- increasede2
- Qualifier
- NO(3)(-)-fed plantse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) enhanced the biomass production of both NO(3)(-)- and NH(4) (+)-fed plants”
e2“increased the nitric oxide (NO) level in roots of NO(3)(-)-fed plants”
Claim · model-written summary
Elevated CO2 decreased the nitric oxide (NO) level in roots of ammonium-fed Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- elevated CO(2)e1
- Outcome
- nitric oxide (NO) levele2
- Direction
- decreasede3
- Qualifier
- NH(4)(+)-fed plantse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“elevated CO(2) enhanced the biomass production of both NO(3)(-)- and NH(4) (+)-fed plants”
e2“increased the nitric oxide (NO) level in roots of NO(3)(-)-fed plants”
e3“decreased it in NH(4)(+)-fed plants”
Claim · model-written summary
The NO scavenger cPTIO inhibited P acquisition by Arabidopsis roots under elevated CO2.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- cPTIOe1
- Outcome
- plant P acquisition by rootse1
- Direction
- inhibitede1
- Qualifier
- under elevated CO(2)e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO) inhibited plant P acquisition by roots under elevated CO(2)”
Claim · model-written summary
A combination of elevated CO2 and nitrate nutrition can induce adaptive strategies that improve P status from P-deficient soluble sources, according to the authors.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- a combination of elevated CO(2) and NO(3)(-) nutritione1
- Outcome
- P statuse1
- Direction
- improvee1
- Qualifier
- from P-deficient soluble sourcese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“a combination of elevated CO(2) and NO(3)(-) nutrition can induce a set of plant adaptive strategies to improve P status from P-deficient soluble sources”
Claim · model-written summary
Nitric oxide may be a signalling molecule that controls the P-acquisition processes in Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Compound
- NOe1
- Outcome
- these processese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P uptake and utilization by Arabidopsis grown in”
e1“NO may be a signalling molecule that controls these processes”
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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.