Extrato de Moringa oleífera Lam. inibidor de fitotoxicidade de metais pesados no desenvolvimento de Lactuca sativa L.
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Data
2019-02-25
Autores
Pereira, Abraão da Silva
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Universidade Federal de Mato Grosso
Resumo
The industrial development after the population growth caused several
concerns, one of which was the use of substances with heavy metals. These have
xenophobic characteristics and represent a huge concern for human life, since they
originate several diseases and cause the death of several biological beings. Several
techniques are used to contain the contaminating power of metals. These include the
use of biological materials as restraining agents or the reduction of harmful effects on
biotic beings. The present work studied the influence of the Moringa extract on the
reduction of heavy metals effects on the germinative process and the development of
lettuce seedlings. The seeds were submitted to the twinning test with concentrations
of heavy metals in mg L-1, these being Arsenic, Cadmium and Lead. For the
phytotoxicity test of the extract in the germinative process, six concentrations of the
extraction were used, with four replicates of each treatment. There was a significant
difference among the heavy metals, the 0.9 and the 2.7 mg L-1 concentrations being
the ones with the highest effects on the reduction of the seedling weight in the
toxicology test. The second test showed a significant effect on germination, expressed
by the concentration of 75 mg L-1 for the three metals, and also a reduction behavior
in the variables of seedling and radicle sizes. The phytotoxicity test of the extract
showed the power to inhibit the development of seedlings for all analyzed variables,
the seedling size being the variable with greater interference in the highest
concentrations of the moringa extract. The concentration 0.25 mg L, proved to be
efficient in inhibiting the contaminating power of Arsenic and Cadmium.
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PEREIRA, Abraão da Silva. Extrato de Moringa oleífera Lam. inibidor de fitotoxicidade de metais pesados no desenvolvimento de Lactuca sativa L.. 2019. 43 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2019.