Banca de DEFESA: FABIO SILVA DO ROSARIO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FABIO SILVA DO ROSARIO
DATE: 31/01/2022
TIME: 14:00
LOCAL: BELÉM-ICA
TITLE:

EFFICIENCY OF THE ANTIOXIDANT SYSTEM IN YOUNG PARICÁ PLANTS (Schizolobium amazonicum Huber ex Ducke) SUBMITTED TO DIFFERENT DOSES OF NICKEL

KEY WORDS:

Antioxidative enzymes, heavy metal, phytoremediation, toxicity.

PAGES: 62
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUMMARY:

Soil contamination by heavy metals represents a high potential for danger in the agricultural sector, in addition to bringing imminent risks to ecosystems and human health. Faced with the problems caused by excess nickel (Ni) and other metals, it is necessary to adopt eco-sustainable techniques that aim to remove or stabilize them in the soil, to help mitigate the effects of pollutants on ecosystems. Phytoremediation is a technique that has been used to recover areas contaminated by different groups, especially metals, through the planned introduction of plants with regenerative behavior, such as Paricá – Schizolobium amazonicum Huber ex Ducke. Therefore, the objective of this work was to evaluate the effect of nickel doses on the antioxidant system of young plants from Paricá. The experiment was carried out in a greenhouse from July to September 2019. Sowing was carried out in Leonard-type pots, adapted with pet bottles, containing sterilized sand (120 ºC for 40 min.), with a capacity of 4.6 L. After 15 days, the seedlings received Sarruge nutrient solution. After 60 days, the application of Ni concentrations in the form of hydrated nickel chloride (NiCl2.H2O) was started. The experimental design was completely randomized (DIC), with five treatments (0, 200, 400, 600 and 800 µM L-1 NiCl2), in six replications. Data were submitted to analysis of variance using the Tukey test (p<0.05). The results showed that the antioxidant defense system (SOD, CAT, APX and G-POD) of Paricá were activated mainly at high concentrations of nickel, as a response to avoid toxicity and deleterious effects to plants, as well as the metal caused an increase in peroxidation. lipid characterized by the variable Malonaldehyde. Regarding nickel concentrations, there was greater accumulation mainly in the roots, however there was also a translocation to the aerial part of this species. Therefore, it is suggested that Schizolobium amazonicum can be characterized as a phytoextractor.

BANKING MEMBERS:
Presidente - 2595267 - CANDIDO FERREIRA DE OLIVEIRA NETO
Externa à Instituição - ANA ECÍDIA DE ARAÚJO BRITO
Externa à Instituição - LUMA CASTRO DE SOUZA - PMCP
Externo à Instituição - WALDEMAR VIANA DE ANDRADE JÚNIOR - SEMAS