Abstract
• The dynamics of silica deposition and Si aggregates formation in inner tangential walls of root endodermal cells, which occurs as an additional stage of endodermal development in sorghum (Sorghum bicolor), were studied. • An environmental scanning electron microscope (ESEM) and X-ray microanalyzer (EDAX) were used to study sorghum roots grown hydroponically with Si (+ Si medium) and without Si (- Si medium). • Silica aggregates were absent in roots of plants cultivated in - Si medium. However, their additional formation on fully mature and thickened endodermal cell walls took place when plants grown in - Si medium were transferred to + Si medium. The beginning of Si aggregates formation was observed and Si deposition detected 2 h after transfer to + Si medium. • By dipping the apical root half in + Si medium, the silica aggregates were formed in the endodermis at the basal part of the root. This supports the hypothesis of outward Si transport from the xylem to the endodermis rather than radial inward Si movement and its deposition at the point of the apoplastic barrier represented by the endodermis.
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Claims 6
Claim · model-written summary
Silica aggregates were absent from roots grown without silicon.
SorghumNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silica aggregates were absent in roots of plants cultivated in - Si medium.”
t0“sorghum”
Claim · model-written summary
Transfer from silicon-free to silicon-containing medium induced aggregate formation on fully mature, thickened endodermal walls.
- Organ / stage
- fully mature and thickened endodermal cell wallse0
- Treatment
- transferred to + Si mediume0
- Outcome
- additional formation on fully mature and thickened endodermal cell wallse0
- Comparator
- - Si mediume0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their additional formation on fully mature and thickened endodermal cell walls took place when plants grown in - Si medium were transferred to + Si medium.”
t0“sorghum”
Claim · model-written summary
Silicon aggregate formation and deposition began within two hours after transfer to silicon medium.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The beginning of Si aggregates formation was observed and Si deposition detected 2 h after transfer to + Si medium.”
t0“sorghum”
Claim · model-written summary
Silicon deposition was detected two hours after transfer to silicon medium.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The beginning of Si aggregates formation was observed and Si deposition detected 2 h after transfer to + Si medium.”
t0“sorghum”
Claim · model-written summary
Dipping the apical root half in silicon medium led to silica aggregates in basal root endodermis.
- Organ / stage
- endodermis at the basal part of the roote0
- Treatment
- dipping the apical root half in + Si mediume0
- Outcome
- silica aggregates were formed in the endodermis at the basal part of the roote0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By dipping the apical root half in + Si medium, the silica aggregates were formed in the endodermis at the basal part of the root.”
t0“sorghum”
Claim · model-written summary
The basal deposition pattern supports outward silicon movement from xylem to endodermis.
- Outcome
- outward Si transport from the xylem to the endodermise0
- Qualifier
- rather than radial inward Si movemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This supports the hypothesis of outward Si transport from the xylem to the endodermis rather than radial inward Si movement and its deposition at the point of the apoplastic barrier represented by the endodermis.”
t0“sorghum”
The same questions in other papers
silicon atom · molecular: metabolites · SorghumResults agree
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- positive
- positive
- positive
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See all 7 papers →application · molecular: metabolites · SorghumPositive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- positive
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See all 9 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.