Abstract
Silicon is deposited in the endodermal tissue in sorghum (Sorghum bicolor L. Moench) roots. Its deposition is thought to protect vascular tissues in the stele against invasion by parasites and drying soil via hardening of endodermal cells. We studied the silicon-induced changes in mechanical properties of cell walls to clarify the role of silicon in sorghum root. Sorghum seedlings were grown in nutrient solution with or without silicon. The mechanical properties of cell walls were measured in three separated root zones: basal, apical and subapical. Silicon treatment decreased cell-wall extensibility in the basal zone of isolated stele tissues covered by endodermal inner tangential walls. The silicon-induced hardening of cell walls was also measured with increases in elastic moduli (E) and viscosity coefficients (eta). These results provided new evidence that silicon deposition might protect the stele as a mechanical barrier by hardening the cell walls of stele and endodermal tissues. In contrast to the basal zone, silicon treatment increased cell-wall extensibility in the apical and subapical zones with concomitant decrease in E and eta. Simultaneously, silicon promoted root elongation. When root elongation is promoted by silicon, one of the causal factors maybe the silicon-enhanced extensibility of cell walls in the growing zone.
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Claims 8
Claim · model-written summary
Silicon decreased cell-wall extensibility in basal stele tissues.
- Organ / stage
- basal zonee0
- Treatment
- Silicon treatmente0
- Outcome
- cell-wall extensibilitye0
- Direction
- decreasede0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silicon treatment decreased cell-wall extensibility in the basal zone of isolated stele tissues covered by endodermal inner tangential walls.”
t0“Sorghum”
Claim · model-written summary
Silicon-induced wall hardening was accompanied by higher elastic moduli.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The silicon-induced hardening of cell walls was also measured with increases in elastic moduli (E) and viscosity coefficients (eta).”
t0“Sorghum”
Claim · model-written summary
Silicon-induced wall hardening was accompanied by higher viscosity coefficients.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The silicon-induced hardening of cell walls was also measured with increases in elastic moduli (E) and viscosity coefficients (eta).”
t0“Sorghum”
Claim · model-written summary
Silicon increased cell-wall extensibility in apical and subapical zones.
- Organ / stage
- apical and subapical zonese0
- Treatment
- silicone0
- Outcome
- cell-wall extensibilitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicon treatment increased cell-wall extensibility in the apical and subapical zones with concomitant decrease in E and eta.”
t0“Sorghum”
Claim · model-written summary
Silicon decreased E and eta in apical and subapical zones.
- Organ / stage
- apical and subapical zonese0
- Treatment
- silicon treatmente0
- Outcome
- E and etae0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicon treatment increased cell-wall extensibility in the apical and subapical zones with concomitant decrease in E and eta.”
t0“Sorghum”
Claim · model-written summary
Silicon promoted root elongation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simultaneously, silicon promoted root elongation.”
t0“Sorghum”
Claim · model-written summary
The authors suggest that silicon-deposited walls may mechanically protect the stele.
- Treatment
- silicon depositione0
- Outcome
- protect the stele as a mechanical barriere0
- Qualifier
- hardening the cell walls of stele and endodermal tissuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicon deposition might protect the stele as a mechanical barrier by hardening the cell walls of stele and endodermal tissues.”
t0“Sorghum”
Claim · model-written summary
Silicon-enhanced wall extensibility in growing zones may contribute to promoted root elongation.
- Treatment
- silicone0
- Outcome
- root elongatione0
- Qualifier
- silicon-enhanced extensibility of cell walls in the growing zonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When root elongation is promoted by silicon, one of the causal factors maybe the silicon-enhanced extensibility of cell walls in the growing zone.”
t0“Sorghum”
The same questions in other papers
silicon atom · growth · SorghumResults differ
15 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- no effect
16 papers more in this group
See all 20 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.