Abstract
Root architecture differences have been linked to the survival of plants on phosphate (P)-deficient soils, as well as to the improved yields of P-efficient crop cultivars. To understand how these differences arise, we have studied the root architectures of P-deficient Arabidopsis (Arabidopsis thaliana Columbia-0) plants. A striking aspect of the root architecture of these plants is that their primary root elongation is inhibited when grown on P-deficient medium. Here, we present evidence suggesting that this inhibition is a result of iron (Fe) toxicity. When the Fe concentration in P-deficient medium is reduced, we observe elongation of the primary root without an increase in P availability or a corresponding change in the expression of P deficiency-regulated genes. Recovery of the primary root elongation is associated with larger plant weights, improved ability to take up P from the medium, and increased tissue P content. This suggests that manipulating Fe availability to a plant could be a valuable strategy for improving a plant's ability to tolerate P deficiency.
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Claims 7
Claim · model-written summary
Primary root elongation was inhibited on phosphate-deficient medium.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae1 - Organ / stage
- primary roote0
- Outcome
- primary root elongatione0
- Direction
- inhibitede0
- Setting
- P-deficient mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their primary root elongation is inhibited when grown on P-deficient medium”
e1“Arabidopsis (Arabidopsis thaliana Columbia-0)”
Claim · model-written summary
Reducing iron in phosphate-deficient medium restored primary root elongation without increasing phosphate availability.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Organ / stage
- primary roote0
- Treatment
- Fe concentration in P-deficient medium is reducede0
- Outcome
- elongation of the primary roote0
- Direction
- elongatione0
- Qualifier
- without an increase in P availabilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the Fe concentration in P-deficient medium is reduced, we observe elongation of the primary root without an increase in P availability or a corresponding change in the expression of P deficiency-regulated genes.”
e1“Arabidopsis (Arabidopsis thaliana Columbia-0)”
Claim · model-written summary
Reducing iron did not change expression of phosphate deficiency-regulated genes.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- Fe concentration in P-deficient medium is reducede0
- Gene
- P deficiency-regulated genese0
- Outcome
- expression of P deficiency-regulated genese0
- Direction
- a corresponding changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the Fe concentration in P-deficient medium is reduced, we observe elongation of the primary root without an increase in P availability or a corresponding change in the expression of P deficiency-regulated genes.”
e1“Arabidopsis (Arabidopsis thaliana Columbia-0)”
Claim · model-written summary
Root elongation recovery was associated with larger plant weights.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Organ / stage
- primary roote0
- Outcome
- plant weightse0
- Direction
- largere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recovery of the primary root elongation is associated with larger plant weights, improved ability to take up P from the medium, and increased tissue P content.”
e1“Arabidopsis (Arabidopsis thaliana Columbia-0)”
Claim · model-written summary
Root elongation recovery was associated with improved phosphate uptake.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Organ / stage
- primary roote0
- Outcome
- ability to take up P from the mediume0
- Direction
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recovery of the primary root elongation is associated with larger plant weights, improved ability to take up P from the medium, and increased tissue P content.”
e1“Arabidopsis (Arabidopsis thaliana Columbia-0)”
Claim · model-written summary
Root elongation recovery was associated with increased tissue phosphate.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Organ / stage
- primary roote0
- Outcome
- tissue P contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recovery of the primary root elongation is associated with larger plant weights, improved ability to take up P from the medium, and increased tissue P content.”
e1“Arabidopsis (Arabidopsis thaliana Columbia-0)”
Claim · model-written summary
The authors suggest manipulating iron availability to improve tolerance of phosphate deficiency.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Outcome
- manipulating Fe availability to a plant could be a valuable strategy for improving a plant's ability to tolerate P deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“manipulating Fe availability to a plant could be a valuable strategy for improving a plant's ability to tolerate P deficiency”
e1“Arabidopsis (Arabidopsis thaliana Columbia-0)”
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