Abstract
ABSTRACT To characterize the effect of silicon (Si) on decreasing transpiration rate in maize (Zea mays L.) plants, the transpiration rate and conductance from both leaves and cuticula of maize plants were measured directly. Plants were grown in nutrient solutions with and without Si under both normal water conditions and drought stress [20% polyethylene glycol (PEG) concentration in nutrient solution] treatments. Silicon application of 2 mmol L−1 significantly decreased transpiration rate and conductance for both adaxial and abaxial leaf surface, but had no effect on transpiration rate and conductance from the cuticle. These results indicate that the role of Si in decreasing transpiration rate must be largely attributed to the reduction in transpiration rate from stomata rather than cuticula. Stomatal structure, element deposition, and stomatal density on both adaxial and abaxial leaf surfaces were observed with scanning electron microscopy (SEM) and a light microscope. Results showed that changes in neither stomatal morphology nor stomatal density could explain the role of Si in decreasing stomatal transpiration of maize plants. Silicon application with H4SiO4 significantly increased Si concentration in shoots and roots of maize plants. Silicon concentration in shoots of maize plants was higher than in roots, whether or not Si was applied. Silicon deposits in cell walls of the leaf epidermis were mostly in the form of polymerized SiO2.
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Claims 7
Claim · model-written summary
Silicon application of 2 mmol L-1 significantly decreased transpiration rate and conductance from both leaf surfaces of maize.
- Organ / stage
- adaxial and abaxial leaf surfacee1
- Treatment
- Silicon application of 2 mmol L−1e1
- Outcome
- transpiration rate and conductancee1
- Direction
- decreasede1
- Comparator
- without Sie0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Silicon application of 2 mmol L−1 significantly decreased transpiration rate and conductance for both adaxial and abaxial leaf surface, but had no effect on transpiration rate and conductance from the cuticle”
e0“Plants were grown in nutrient solutions with and without Si”
t0“Maize Plants”
Claim · model-written summary
Silicon had no effect on transpiration rate and conductance from the cuticle of maize.
- Treatment
- Silicon application of 2 mmol L−1e1
- Outcome
- transpiration rate and conductance from the cuticlee1
- Direction
- had no effecte1
- Comparator
- without Sie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Silicon application of 2 mmol L−1 significantly decreased transpiration rate and conductance for both adaxial and abaxial leaf surface, but had no effect on transpiration rate and conductance from the cuticle”
e0“Plants were grown in nutrient solutions with and without Si”
t0“Maize Plants”
Claim · model-written summary
The Si-related reduction in transpiration is largely attributed to reduced transpiration through stomata rather than the cuticle.
- Treatment
- Sie2
- Outcome
- transpiration ratee2
- Qualifier
- reduction in transpiration rate from stomata rather than cuticulae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“These results indicate that the role of Si in decreasing transpiration rate must be largely attributed to the reduction in transpiration rate from stomata rather than cuticula”
t0“Maize Plants”
Claim · model-written summary
Changes in stomatal morphology and stomatal density could not explain the Si effect on stomatal transpiration of maize.
- Outcome
- changes in neither stomatal morphology nor stomatal densitye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Results showed that changes in neither stomatal morphology nor stomatal density could explain the role of Si in decreasing stomatal transpiration of maize plants”
Claim · model-written summary
Silicon application with H4SiO4 significantly increased Si concentration in shoots and roots of maize.
- Treatment
- Silicon application with H4SiO4e4
- Outcome
- Si concentration in shoots and rootse4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Silicon application with H4SiO4 significantly increased Si concentration in shoots and roots of maize plants”
Claim · model-written summary
Si concentration in maize shoots was higher than in roots, whether or not Si was applied.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Silicon concentration in shoots of maize plants was higher than in roots, whether or not Si was applied”
Claim · model-written summary
Silicon deposits in leaf epidermal cell walls of maize were mostly polymerized SiO2.
- Organ / stage
- leaf epidermise6
- Outcome
- Silicon deposits in cell wallse6
- Qualifier
- mostly in the form of polymerized SiO2e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Silicon deposits in cell walls of the leaf epidermis were mostly in the form of polymerized SiO2”
t0“Maize Plants”
The same questions in other papers
silicon atom · physiology: gas exchange · Zea mays (maize)Results differ
1 paper in the same direction as this paper · 16 in the opposite direction
- positive
- positive
- positive
14 papers more in this group
See all 18 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.