Abstract
Whole-plant CO 2 exchange and root-shoot interactions during transition from vegetative to reproductive growth of `Coral Charm' chrysanthemum ( Dendranthema ×grandiflorum Ramat.) were investigated over a range of P concentrations considered to be deficient (1 μM), adequate (100 μM), or high (5 mM). Transition from vegetative to reproductive growth resulted in reduced photosynthate production, root respiration, biomass accumulation, and starch accumulation in leaves. Root respiration was low in high-P plants regardless of growth stage. Reduced root respiration may indicate changes in source-sink relationships during the transition from vegetative to reproductive growth, making roots less competitive sinks than developing flowers. Plant responses to P deficiency included decreased CO 2 assimilation and shoot biomass accumulation but increased root respiration, root:shoot ratio, specific leaf mass (SLM), and starch accumulation in leaves. Reduced root respiration activity in high-P plants was presumably due to differences in root architecture resulting in proportionately fewer root apices in high P. Daily CO 2 assimilation, shoot biomass, SLM, and root:shoot ratio were similar in plants grown with adequate-P and high-P availability, although plant P accumulation increased with P availability. Our results suggest that the excessive P fertilization often used in ornamental production systems is detrimental to root activity.
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Claims 10
Claim · model-written summary
Transition to reproductive growth reduced photosynthate production, root respiration, biomass and leaf starch accumulation.
- Taxon
- Chrysanthemum
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Chrysanthemumt0 - Organ / stage
- reproductive growthe0
- Outcome
- reduced photosynthate production, root respiration, biomass accumulation, and starch accumulation in leavese0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“Transition from vegetative to reproductive growth resulted in reduced photosynthate production, root respiration, biomass accumulation, and starch accumulation in leaves”
t0“Chrysanthemum”
Claim · model-written summary
Root respiration was low under high P regardless of growth stage.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- high-Pe0
- Outcome
- Root respiratione0
- Direction
- lowe0
- Qualifier
- regardless of growth stagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root respiration was low in high-P plants regardless of growth stage”
t0“Chrysanthemum”
Claim · model-written summary
P deficiency decreased CO 2 assimilation and shoot biomass accumulation.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- P deficiencye0
- Outcome
- CO 2 assimilation and shoot biomass accumulatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant responses to P deficiency included decreased CO 2 assimilation and shoot biomass accumulation but increased root respiration, root:shoot ratio, specific leaf mass (SLM), and starch accumulation in leaves”
t0“Chrysanthemum”
Claim · model-written summary
P deficiency increased root respiration, root:shoot ratio and specific leaf mass.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- P deficiencye0
- Outcome
- root respiration, root:shoot ratio, specific leaf mass (SLM)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant responses to P deficiency included decreased CO 2 assimilation and shoot biomass accumulation but increased root respiration, root:shoot ratio, specific leaf mass (SLM), and starch accumulation in leaves”
t0“Chrysanthemum”
Claim · model-written summary
P deficiency increased leaf starch accumulation.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- P deficiencye0
- Outcome
- starch accumulation in leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant responses to P deficiency included decreased CO 2 assimilation and shoot biomass accumulation but increased root respiration, root:shoot ratio, specific leaf mass (SLM), and starch accumulation in leaves”
t0“Chrysanthemum”
Claim · model-written summary
Daily CO 2 assimilation, shoot biomass, SLM and root:shoot ratio were similar at adequate and high P.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- high-P availabilitye0
- Outcome
- Daily CO 2 assimilation, shoot biomass, SLM, and root:shoot ratioe0
- Direction
- similare0
- Comparator
- adequate-Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Daily CO 2 assimilation, shoot biomass, SLM, and root:shoot ratio were similar in plants grown with adequate-P and high-P availability”
t0“Chrysanthemum”
Claim · model-written summary
Plant P accumulation increased with P availability.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- P availabilitye0
- Outcome
- plant P accumulatione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant P accumulation increased with P availability”
t0“Chrysanthemum”
Claim · model-written summary
Reduced root respiration during reproductive transition may indicate roots becoming less competitive sinks than flowers.
- Taxon
- ChrysanthemumChrysanthemumt0
- Outcome
- roots less competitive sinks than developing flowerse0
- Qualifier
- changes in source-sink relationshipse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduced root respiration may indicate changes in source-sink relationships during the transition from vegetative to reproductive growth, making roots less competitive sinks than developing flowers”
t0“Chrysanthemum”
Claim · model-written summary
Reduced root respiration at high P was attributed to fewer root apices.
- Taxon
- ChrysanthemumChrysanthemumt0
- Outcome
- Reduced root respiration activitye0
- Qualifier
- proportionately fewer root apices in high Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduced root respiration activity in high-P plants was presumably due to differences in root architecture resulting in proportionately fewer root apices in high P”
t0“Chrysanthemum”
Claim · model-written summary
The authors conclude that excessive P fertilization is detrimental to root activity in ornamental production.
- Taxon
- ChrysanthemumChrysanthemumt0
- Treatment
- excessive P fertilizatione0
- Outcome
- root activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“excessive P fertilization often used in ornamental production systems is detrimental to root activity”
t0“Chrysanthemum”
The same questions in other papers
phosphorus · growth · ChrysanthemumPositive and negative results
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See all 12 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.