Banca de DEFESA: VITOR RESENDE DO NASCIMENTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : VITOR RESENDE DO NASCIMENTO
DATA : 26/07/2019
HORA: 14:00
LOCAL: ICA/PPGCF-02
TÍTULO:

Nutritional evaluation and antioxidative system in young plants of Paricá (Schizolobium amazonicum Huber Ex Ducke) submitted to different dosages of Cadmium.

PALAVRAS-CHAVES:

Nutritional elements, antioxidative enzymes, heavy metal

PÁGINAS: 63
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
RESUMO:

The aim of this work was to evaluate the nutritional parameters and the antioxidant system of young plants of the species (Schizolobium amazonicum Huber ex Ducke) when submitted to different concentrations of cadmium. The experiment was carried out at the home of the Amazon Region (UFRA), located in Belém, Pará, from December 2017 to June 2018. Initially, seedlings were produced from paricá seeds originating from the Association of the State's Timber Exporting Industries of Pará in Benevides-Pará. The seeds were sown in Leonard pots with a capacity of 4.6 L adapted with pet bottles containing washed and sterilized sand (120 ºC for 40 min). After 15 days after sowing, they received a nutrient solution from Sarruge. After 60 days after sowing, the application of cadmium concentrations in the form of hydrated cadmium chloride (CdCl2.H2O). The experimental design was completely randomized, with 5 treatments being composed of control plants (without cadmium) and with doses of cadmium (CdCl2 178µM, CdCl2 356 µM, CdCl2 534µM, CdCl2 712 µM). The data were submitted to analysis of variance by the F test (p <0.05) using the Statistica software, and the differences between the treatments analyzed by the Tukey test (p <0.05) were adjusted by equations of polynomial regression P <0.01 or 0.05 using the Sisvar program. The main nutritional variables were destabilized in their functions with the increase of cadmium doses, influencing the physiological process of the plant. For the antioxidant system, the enzymes (G-POD, APX, SOD and CAT) provided a decrease as the doses were increased. The changes in nutritional parameters and antioxidant enzymes, consequently led to structural changes of these plants, evidencing low activity for the reversion of stress in the leaves and greater activity in the roots. Therefore, cadmium accumulated mainly in the roots, but there was translocation to aerial part. Therefore, it can be characterized as a phytoextractor.

MEMBROS DA BANCA:
Presidente - 2595267 - CANDIDO FERREIRA DE OLIVEIRA NETO
Externo à Instituição - WALDEMAR VIANA DE ANDRADE JÚNIOR - NENHUMA
Externo à Instituição - LUMA CASTRO DE SOUZA - NENHUMA
Externo à Instituição - CRISTINE BASTOS DO AMARANTE - INT