Banca de QUALIFICAÇÃO: JEAN PAULO VITOR DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: JEAN PAULO VITOR DE OLIVEIRA
DATA: 28/02/2023
HORA: 15:00
LOCAL: Google Meet http://meet.google.com/rri-jivs-wyd
TÍTULO:

Root anatomy, growth, and development of Typha domingensis Pers. (Typhaceae) and their relationship with cadmium absorption, accumulation, and tolerance

PALAVRAS-CHAVES:

Aquatic macrophytes; Cattail; Heavy metals; Root system; Stress

PÁGINAS: 12
GRANDE ÁREA: Ciências Biológicas
ÁREA: Biologia Geral
RESUMO:

Typha domingensis Pers. is a plant that grows in marshy environments, where cadmium (Cd) accumulates. The root is the frst organ that comes into contact with the metal. The aim of this study was to evaluate the efect of Cd on the roots of T. domingensis. The experiment was conducted in a greenhouse using diferent Cd concentrations: (1) 0 μM (control), (2) 10 μM, and (3) 50 μM, with 10 replicates for 90 days. The plants were placed in plastic containers containing 5 L of nutrient solution modifed with the diferent Cd concentrations. At the end of the experiment, the roots were measured, sampled, fxed, and subjected to usual plant microtechniques. The slides were observed and photographed under light microscopy and analyzed in ImageJ software. To measure Cd absorption, atomic-absorption spectrometry was used. The data were subjected to analysis of variance and comparison of means by the Scott-Knott test at P<0.05. When exposed to 50 μM of Cd, the roots accumulated 99.35% of the Cd. At this concentration, there was a reduction in the exodermis but there was an increase in the diameter of the cortical cells and in the proportion of aerenchyma in the cortex. There was an increase in the root cap, which guaranteed the protection of the primary meristems. Therefore, T. domingensis adjusts its root anatomy improving the Cd tolerance and shows potential for phytoremediation purposes

MEMBROS DA BANCA:
Interno - EVARISTO MAURO DE CASTRO (Membro)
Presidente - FABRICIO JOSE PEREIRA - UNIFAL (Membro)
Interno - MARINES FERREIRA PIRES LIRA (Suplente)
Interno - THIAGO ALVES MAGALHAES (Membro)
Externo à Instituição - Vinícius Politi Duarte - UNIFEI - UNI (Membro)