Abstract
Abstract The objective of this study was to test the tolerance of two species of Schinus and two species of Handroanthus cultivated in iron mining tailings from the rupture of the dam in Mariana, Brazil. Samples of mining tailings were collected 1 km away from the dam location and then dried, stored in plastic bags and further analysed for elemental composition. The seeds, later seedlings, were cultivated in the mining waste and in sand in two experiments separately and the experimental design was in a 2 × 3 factorial scheme (two substrates and three combinations of species), with six replications ( n = 36). After 60 d of the establishment of the experiments, the germination data, biometric and anatomical measurements of the leaves were evaluated, in addition to the elemental characterization of the tailings. Mining tailings showed macro and micronutrients in addition to potentially toxic elements (As, Al, Cr, Pb and Ni). Seeds germinated and seedlings survived in the mining tailings. Mining tailings reduced the seedling emergence in Handroanthus , whereas it increased the emergence in S. molle and had no significant effect in S. terebinthifolia . Mining tailings reduced the number and length of roots in Schinus but increased these traits in Handroanthus species. Moreover, mining tailings reduced the fresh mass in Handroanthus but had no effect in the Schinus species. Mining tailings reduced the palisade and spongy parenchyma Handroanthus but only the spongy parenchyma was reduced in Schinus species. Therefore, mining tailings provided conditions for seed germination and seedling growth and Schinus species showed higher tolerance.
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Claims 9
Claim · model-written summary
Seeds germinated and seedlings survived in tailings.
SchinusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds germinated and seedlings survived in the mining tailings.”
e1“two species of Schinus and two species of Handroanthus”
Claim · model-written summary
Tailings reduced Handroanthus emergence.
- Taxon
- Handroanthus
Handroanthuse0 - Treatment
- Mining tailingse0
- Outcome
- seedling emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mining tailings reduced the seedling emergence in Handroanthus”
Claim · model-written summary
Tailings increased S. molle emergence.
- Taxon
- S. molle
Schinus mollee0 - Treatment
- Mining tailingse1
- Outcome
- emergencee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it increased the emergence in S. molle”
e1“Mining tailings reduced the seedling emergence in Handroanthus”
Claim · model-written summary
Tailings reduced Schinus root number and length.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mining tailings reduced the number and length of roots in Schinus”
Claim · model-written summary
Tailings reduced Handroanthus fresh mass.
- Taxon
- HandroanthusHandroanthuse0
- Treatment
- mining tailingse0
- Outcome
- fresh masse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mining tailings reduced the fresh mass in Handroanthus”
Claim · model-written summary
Tailings had no effect on Schinus fresh mass.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“had no effect in the Schinus species”
e1“mining tailings reduced the fresh mass”
Claim · model-written summary
Tailings reduced Handroanthus palisade and spongy parenchyma.
- Taxon
- HandroanthusHandroanthuse0
- Treatment
- Mining tailingse0
- Outcome
- palisade and spongy parenchymae0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mining tailings reduced the palisade and spongy parenchyma Handroanthus”
Claim · model-written summary
Tailings reduced Schinus spongy parenchyma.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only the spongy parenchyma was reduced in Schinus species”
e1“Mining tailings reduced the seedling emergence in Handroanthus”
Claim · model-written summary
Schinus species showed higher tolerance.
- Outcome
- higher tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Schinus species showed higher tolerance”