Abstract
Abstract Background Plants are not able to take up organically bound phosphorus (P) before it is hydrolyzed by extracellular phosphatases while intracellular phosphatases play a role in P remobilization. Aims The aim of this study was to evaluate intra‐ and extracellular acid phosphatase activity as well as root and shoot growth of two modern starch potato cultivars at different levels of P deprivation. Methods In vitro propagated potato plantlets (cultivars Kuba and Cardoso) were grown in sand and fertigated with five different P concentrations, ranging from 1 to 0.05 mM P. Growth parameters, plant P concentrations, and acid phosphatase activities were determined after 40 days. Results Shoot and root biomass decreased gradually with decreasing P supply, while the root‐to‐shoot ratio increased. Shoot P concentration decreased steadily, but root P concentration remained constant at P levels below 0.5 mM. Root‐associated and root intracellular acid phosphatase activity increased in both cultivars with rising levels of P deprivation. The activity of acid phosphatases in old but not in young leaves was increased with P deprivation. Intracellular acid phosphatase activity was genotype dependent, with higher activity in the cultivar Kuba than in Cardoso. Conclusions Our results point to a tissue specific regulation of acid phosphatase activity depending on plant P status and potato genotype. Increasing root‐associated acid phosphatase activities may help P starved potato plants to ensure a sufficient P nutrition. Further research is needed to unravel the roles of leaf intracellular acid phosphatases in potato.
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Claims 10
Claim · model-written summary
Shoot and root biomass decreased as phosphorus supply decreased.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- decreasing P supplye0
- Outcome
- Shoot and root biomasse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot and root biomass decreased gradually with decreasing P supply, while the root‐to‐shoot ratio increased.”
t0“Potato”
Claim · model-written summary
The root-to-shoot ratio increased with decreasing phosphorus supply.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- decreasing P supplye0
- Outcome
- root‐to‐shoot ratioe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot and root biomass decreased gradually with decreasing P supply, while the root‐to‐shoot ratio increased.”
t0“Potato”
Claim · model-written summary
Shoot phosphorus concentration decreased steadily under phosphorus deprivation.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- P deprivationt0
- Outcome
- Shoot P concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot P concentration decreased steadily, but root P concentration remained constant at P levels below 0.5 mM.”
t0“Potato root and leaf phosphatase activity in response to P deprivation”
Claim · model-written summary
Root phosphorus concentration remained constant below 0.5 mM phosphorus.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- P levels below 0.5 mMe0
- Outcome
- root P concentratione0
- Direction
- remained constante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root P concentration remained constant at P levels below 0.5 mM.”
t0“Potato”
Claim · model-written summary
Root-associated and root intracellular acid phosphatase activity increased in both cultivars with phosphorus deprivation.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- rising levels of P deprivatione0
- Outcome
- Root‐associated and root intracellular acid phosphatase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root‐associated and root intracellular acid phosphatase activity increased in both cultivars with rising levels of P deprivation.”
t0“Potato”
Claim · model-written summary
Acid phosphatase activity increased in old leaves with phosphorus deprivation.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- olde0
- Treatment
- P deprivatione0
- Outcome
- activity of acid phosphatasese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of acid phosphatases in old but not in young leaves was increased with P deprivation.”
t0“Potato”
Claim · model-written summary
Acid phosphatase activity did not increase in young leaves with phosphorus deprivation.
- Taxon
- PotatoSolanum tuberosumt0
- Organ / stage
- young leavese0
- Treatment
- P deprivatione0
- Outcome
- activity of acid phosphatasese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of acid phosphatases in old but not in young leaves was increased with P deprivation.”
t0“Potato”
Claim · model-written summary
Intracellular acid phosphatase activity was higher in Kuba than Cardoso.
- Taxon
- PotatoSolanum tuberosumt0
- Material
- Kubae0
- Outcome
- Intracellular acid phosphatase activitye0
- Direction
- highere0
- Comparator
- Cardosoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intracellular acid phosphatase activity was genotype dependent, with higher activity in the cultivar Kuba than in Cardoso.”
t0“Potato”
Claim · model-written summary
The results indicate tissue-specific phosphatase regulation depending on phosphorus status and genotype.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- acid phosphatase activitye0
- Qualifier
- tissue specific regulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our results point to a tissue specific regulation of acid phosphatase activity depending on plant P status and potato genotype.”
Claim · model-written summary
Increasing root-associated phosphatase activity may help phosphorus-starved potato plants maintain sufficient nutrition.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- sufficient P nutritione0
- Qualifier
- Increasing root‐associated acid phosphatase activitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing root‐associated acid phosphatase activities may help P starved potato plants to ensure a sufficient P nutrition.”
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