Banca de DEFESA: GLAUCO ANDRÉ DOS SANTOS NOGUEIRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : GLAUCO ANDRÉ DOS SANTOS NOGUEIRA
DATA : 28/12/2018
HORA: 09:00
LOCAL: SALA 01-DE PÓS-GRADUAÇÃO DE CIÊNCIAS FLORESTAIS.
TÍTULO:

Gaseous exchanges, growth and biochemical behavior in young plants of paricá Schizolobium amazonicum Huber ex Ducke in different concentrations of cadmium

PALAVRAS-CHAVES:

Physiological, Trace Element, Carbonated Compounds

PÁGINAS: 85
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
RESUMO:

The objective of this work was to evaluate the physiological, growth and biochemical parameters of young plants of paricá Schizolobium amazonicum Huber ex Ducke when submitted to different concentrations of cadmium. The experiment was carried out in a greenhouse of the Institute of Agricultural Sciences (ICA), belonging to the Federal Rural University of Amazonia (UFRA), located in Belém-Pará. Initially seedlings were produced from paricá seeds from the Association of Timber Exporting Industries of the State of Pará. Seeds were placed to germinate in a Leoanard pot with capacity of 4.6 L adapted with pet bottles containing autoclaved washed sand. After 15 days after sowing, they received nutritive solution of Sarruge (1/4 and 1/2 strength). After 60 days after sowing, increasing concentrations of cadmium in the form of cadmium chloride (CdCl2.H2O) were started. The experimental design was completely randomized (DIC), with 5 treatments consisting of control plants (without cadmium doses) and with doses of Cadmium (CdCl2 178μM, CdCl2 356 μM, CdCl2 534μM, CdCl2 712 μM) with 7 replicates each plant / vessel) totaling 35 experimental units. The data were submitted to analysis of variance by the F test (p <0.05) and the means were compared by the least significant difference of the Tukey test (p <0.05) and were adjusted by polynomial regression equations P <0, 01 or 0.05 using the Sisvar program. The main physiological variables were destabilized in their functions with the increase of cadmium doses, influencing the energy process of the same ones. For the biophysical variables, the cadmium provided a decrease of growth as the doses were increased, interfering in smaller production of biomass. The negative changes of the physiological parameters, consequently led to changes in the carbon and nitrogen metabolism of these plants, evidencing low concentrations of the variables that contain nitrogen in their structures. Cadmium accumulated mainly in the roots of paricá, characterizing a low translocation for aerial part. Moreover, due to the circumstances applied in this study and the high concentrations of cadmium used in paricá seedlings, complementary research is necessary to understand more comprehensively the harmful effect of this element in paricá plants.

MEMBROS DA BANCA:
Presidente - 2595267 - CANDIDO FERREIRA DE OLIVEIRA NETO
Externo ao Programa - 3064403 - LUMA CASTRO DE SOUZA
Externo ao Programa - 1315246 - JOZE MELISA NUNES DE FREITAS
Externo ao Programa - 2258866 - HERACLITO EUGENIO OLIVEIRA DA CONCEICAO
Externo à Instituição - HELLEN SIGLIA DEMETRIO BARROS - NENHUMA
Externo à Instituição - CRISTINE BASTOS DO AMARANTE - INT