Abstract
Anatomical modifications of leaves and other organs associated with mineral nutrition have been observed in many plants. However, little is known about the quantitative effects of Si and Mn on the anatomy of plant leaves, especially in rice. This study aimed to quantify the tissue thickness of rice leaves and the density of silica bodies in rice leaves grown in a nutrient solution supplemented with Si and Mn and evaluate the possible effects of Si on Mn toxicity. Treatments were arranged in a 2×3 factorial scheme = six combinations of treatments, two doses of Si (0 and 2 mmol L-1), and three doses of Mn (0.5, 2.5, and 10 µmol L-1) in randomized complete block design with four replications. After 39 days in the nutrient solution with the respective treatments, anatomical and micromorphometric measures of the leaf blade were carried out to determine the thickness and area of leaf tissues. The data were submitted to analysis of variance (ANOVA) and Tukey’s multiple comparisons test of means(p?0,05). The abaxial and adaxial epidermal thickness, as well as the density of silica bodies increased with the addition of Si to the nutrient solution. This study demonstrated that Si reduced the number of vascular bundles and Mn reduced the thickness of the chlorenchyma with increasing doses. Manganese doses of up to 10 ?mol L-1 do not inhibit the uptake and deposition of silicon in rice leaf tissues. Higher Si concentration in the solution caused anatomical changes in the leaf, which was associated with a possible alleviation of Mn toxicity due to the higher concentration of Si in plants since this effect was observed mainly when Si was present in the nutrient solution.
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Claims 5
Claim · model-written summary
Adding Si to the nutrient solution increased abaxial and adaxial epidermal thickness and the density of silica bodies in rice leaves.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- leavese0
- Treatment
- addition of Si to the nutrient solutione1
- Outcome
- abaxial and adaxial epidermal thickness, as well as the density of silica bodiese1
- Direction
- increasede1
- Setting
- nutrient solutione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue thickness of rice leaves and the density of silica bodies in rice leaves grown in a nutrient solution supplemented with Si and Mn”
e1“The abaxial and adaxial epidermal thickness, as well as the density of silica bodies increased with the addition of Si to the nutrient solution”
Claim · model-written summary
Si reduced the number of vascular bundles in rice leaves.
- Taxon
- riceOryza sativae0
- Organ / stage
- leavese0
- Treatment
- Sie2
- Outcome
- number of vascular bundlese2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue thickness of rice leaves and the density of silica bodies in rice leaves grown in a nutrient solution supplemented with Si and Mn”
e2“Si reduced the number of vascular bundles”
Claim · model-written summary
Mn reduced the thickness of the chlorenchyma in rice leaves with increasing Mn doses.
- Taxon
- riceOryza sativae0
- Treatment
- Mne3
- Outcome
- thickness of the chlorenchymae3
- Direction
- reducede3
- Qualifier
- with increasing dosese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue thickness of rice leaves and the density of silica bodies in rice leaves grown in a nutrient solution supplemented with Si and Mn”
e3“Mn reduced the thickness of the chlorenchyma with increasing doses”
Claim · model-written summary
Mn doses of up to 10 µmol L-1 do not inhibit the uptake and deposition of silicon in rice leaf tissues.
- Taxon
- riceOryza sativae0
- Treatment
- Manganese doses of up to 10 ?mol L-1e4
- Outcome
- uptake and deposition of silicone4
- Direction
- do not inhibite4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue thickness of rice leaves and the density of silica bodies in rice leaves grown in a nutrient solution supplemented with Si and Mn”
e4“Manganese doses of up to 10 ?mol L-1 do not inhibit the uptake and deposition of silicon in rice leaf tissues”
Claim · model-written summary
Higher Si concentration in the solution was associated with a possible alleviation of Mn toxicity in rice.
- Taxon
- riceOryza sativae0
- Treatment
- Higher Si concentration in the solutione5
- Outcome
- Mn toxicitye5
- Direction
- decreaseinferrede5
- Qualifier
- possiblee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue thickness of rice leaves and the density of silica bodies in rice leaves grown in a nutrient solution supplemented with Si and Mn”
e5“Higher Si concentration in the solution caused anatomical changes in the leaf, which was associated with a possible alleviation of Mn toxicity”
The same questions in other papers
manganese atom · nutrient: content · Oryza sativa (rice)Positive and negative results
8 papers in the same direction as this paper · 23 in the opposite direction
- no effect
- positive
- positive
28 papers more in this group
See all 32 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.