Abstract
The objective of this work was to evaluate aluminum tolerance of five genotypes of Urochloa decumbens (D24, CD24-2, CD24-27, CD24-45 e D62) and five genotypes of Urochloa ruziziensis (R30, R44, R46, R50 and R125) in hydroponic system. Uniform tillers were collected from these genotypes and transferred to two solutions: solution 1 (200 μM CaCl2, pH 4.2) and solution 2 (200 μM CaCl2 + 200 μM AlCl3, pH 4.2). Twenty-one days later, the roots of the plants were separated, stained and digitalized for analysis of the length and diameter of the main root. The experiment was conducted in a completely randomized design, in factorial (genotypes × doses) with three replications. A significant interaction occurred between genotype and dose for length and width of the main root, and the results presented in average, a significant difference for most genotypes. The means of main root length in the absence and presence of aluminum were not significant for D62 (U. decumbens cv. Basilisk), CD24-45 and R46. Means were not significant for the diameter of the main root for CD24-2, CD24-27 and D62. Genotype D62 was the only one classified as tolerant to aluminum and R50 the only one classified as sensitive. Most evaluated genotypes showed medium to low tolerance. This classification was based on confidence intervals (IC 99%) for the mean of the relative tolerance indices estimated for length and diameter of the main root. These results can be used in the choice of progenitors aiming at developing segregating populations for studies of inheritance and mapping of genes and/or loci related to aluminum tolerance in Urochloa.
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Claims 6
Claim · model-written summary
Genotype and aluminum dose interacted significantly for main-root length and width.
UrochloaNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant interaction occurred between genotype and dose for length and width of the main root”
e1“Urochloa decumbens”
Claim · model-written summary
Main-root length did not differ significantly with and without aluminum for D62, CD24-45 and R46.
- Taxon
- U. decumbens
.jpg?width=60)
Urochloa decumbense0 - Material
- D62e0
- Treatment
- presence of aluminume0
- Outcome
- main root lengthe0
- Direction
- not significante0
- Comparator
- absencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The means of main root length in the absence and presence of aluminum were not significant for D62 (U. decumbens cv. Basilisk), CD24-45 and R46.”
Claim · model-written summary
Main-root diameter did not differ significantly for CD24-2, CD24-27 and D62.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Means were not significant for the diameter of the main root for CD24-2, CD24-27 and D62.”
e1“Urochloa decumbens”
Claim · model-written summary
D62 was the only genotype classified as aluminum tolerant.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotype D62 was the only one classified as tolerant to aluminum”
e1“Urochloa decumbens”
Claim · model-written summary
R50 was the only genotype classified as aluminum sensitive.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“R50 the only one classified as sensitive”
e1“Urochloa ruziziensis”
Claim · model-written summary
Most evaluated genotypes showed medium to low aluminum tolerance.
- Outcome
- medium to low tolerancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most evaluated genotypes showed medium to low tolerance.”
e1“Urochloa decumbens”
The same questions in other papers
aluminium atom · growth · Urochloa decumbensResults agree
2 papers in the same direction as this paper
- no effect
- negative
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.