Abstract
Abstract Silicon (Si) may be involved in the modification of C:N:P stoichiometry and in physiological processes, increasing sorghum growth and grain production. The objective was to evaluate the effect of Si supply on C:N:P:Si stoichiometry, physiological response, growth, and grain production of sorghum. The experiment was carried out in pots with four concentrations of Si: 0; 1.2; 2.4; and 3.6 mmol L −1 in a completely randomized design, with six replicates. Physiological attributes and dark green color index were measured and grain and biomass production were determined. Posteriorly, the plant material was ground to determine silicon (Si), carbon (C), nitrogen (N), and phosphorus (P) contents in order to analyze C:N:P:Si stoichiometry. C:Si and C:N ratios decreased at all Si concentrations applied (1.2, 2.4, and 3.6 mmol L −1 ) and in all plant parts studied, being lower at 3.6 mmol L −1 . The lowest C:P ratios of leaves and roots were observed at 3.6 mmol L −1 Si and the lowest C:P ratio of stems was observed at 1.2 mmol L −1 Si. Si concentrations were not significant for the N:P ratio of leaves. The highest N:P ratio of stems was observed at 3.6 mmol L −1 , while the lowest N:P ratio of roots was observed at 2.4 and 3.6 mmol L −1 . Regardless of photosynthetic parameters, the application of 1.2 mmol L −1 Si enhanced photosynthetic rate. The application of 2.4 and 3.6 mmol L −1 enhanced stomatal conductance and dark green color index. The mass of 1000 grains was not influenced by Si applications, while Si applications at all concentrations studied (1.2, 2.4, and 3.6 mmol L −1 ) enhanced shoot and total dry matter, not affecting root dry matter and grain production. In conclusion, Si supply modifies C:N:P:Si stoichiometry and increases physiologic parameters, growth, development, and grain production in sorghum.
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Claims 11
Claim · model-written summary
All applied Si concentrations reduced C:Si and C:N ratios in all studied parts, lowest at 3.6 mmol L −1.
- Treatment
- Si concentrations applied (1.2, 2.4, and 3.6 mmol L −1 )e0
- Outcome
- C:Si and C:N ratiose0
- Direction
- decreasede0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C:Si and C:N ratios decreased at all Si concentrations applied (1.2, 2.4, and 3.6 mmol L −1 ) and in all plant parts studied, being lower at 3.6 mmol L −1”
t0“sorghum”
Claim · model-written summary
Leaf and root C:P ratios were lowest at 3.6 mmol L −1 Si.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest C:P ratios of leaves and roots were observed at 3.6 mmol L −1 Si”
t0“sorghum”
Claim · model-written summary
Stem C:P ratio was lowest at 1.2 mmol L −1 Si.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest C:P ratio of stems was observed at 1.2 mmol L −1 Si”
t0“sorghum”
Claim · model-written summary
Si concentration did not significantly affect leaf N:P ratio.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si concentrations were not significant for the N:P ratio of leaves”
t0“sorghum”
Claim · model-written summary
Stem N:P ratio was highest at 3.6 mmol L −1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest N:P ratio of stems was observed at 3.6 mmol L −1”
t0“sorghum”
Claim · model-written summary
Root N:P ratio was lowest at 2.4 and 3.6 mmol L −1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest N:P ratio of roots was observed at 2.4 and 3.6 mmol L −1”
t0“sorghum”
Claim · model-written summary
1.2 mmol L −1 Si enhanced photosynthetic rate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of 1.2 mmol L −1 Si enhanced photosynthetic rate”
t0“sorghum”
Claim · model-written summary
2.4 and 3.6 mmol L −1 enhanced stomatal conductance and dark green color index.
- Treatment
- 2.4 and 3.6 mmol L −1e0
- Outcome
- stomatal conductance and dark green color indexe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 2.4 and 3.6 mmol L −1 enhanced stomatal conductance and dark green color index”
t0“sorghum”
Claim · model-written summary
Si applications did not influence mass of 1000 grains.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mass of 1000 grains was not influenced by Si applications”
t0“sorghum”
Claim · model-written summary
All studied Si concentrations enhanced shoot and total dry matter.
- Treatment
- Si applications at all concentrations studied (1.2, 2.4, and 3.6 mmol L −1 )e0
- Outcome
- shoot and total dry mattere0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si applications at all concentrations studied (1.2, 2.4, and 3.6 mmol L −1 ) enhanced shoot and total dry matter”
t0“sorghum”
Claim · model-written summary
Si applications did not affect root dry matter or grain production.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“not affecting root dry matter and grain production”
e1“The mass of 1000 grains was not influenced by Si applications”
t0“sorghum”
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See all 5 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.