Banca de QUALIFICAÇÃO: JOÃO HENRIQUE PINTO FERREIRA WOLFF

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : JOÃO HENRIQUE PINTO FERREIRA WOLFF
DATA : 31/08/2017
HORA: 14:30
LOCAL: Sala Catolé, Centro de Biociências - UFRN
TÍTULO:

INFLUÊNCIA DE QUATRO DIFERENTES TRATAMENTOS SOBRE A GERMINAÇÃO DE SEMENTES DE MANGABA (Hancornia speciosa GOMES)

PALAVRAS-CHAVES:

Hancornia speciosa; Plant nursery; Germination; Chemical scarification. 

PÁGINAS: 23
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

The mangabeira (Hancornia speciosa Gomes) belongs to the family Apocynaceae. It has great social, economic and cultural importance in the Northeast Region of Brazil. As the species remains wild, exploitation of its resources is still extractivism. Despite its importance the species finds difficulty to be produced by nurserymen and propagated as cultivar. The objective of this work was to develop a standard methodology for producing mangaba seedlings simple enough to be reproduced by nurserymen. Semi-structured open interviews with mangaba collectors, fair dealers and nurserymen were conducted with the purpose of investigating the ways in which they seek to overcome seed dormancy and produce mangaba seedlings. The mangaba fruits were obtained in a fair. In the Laboratory of Biotechnology of the Conservation of Native Species (LABCEN / UFRN) the seeds were demolished in tap water with the aid of a sieve. For the control group (C) the seeds had the pulp adhered to the tegument completely removed by this method. A treatment promoted the removal of the pulp with sand (T1) while the other treatments subjected the seeds to the chemical scarification in sodium hypochlorite (NaClO) for five minutes (T2); To chemical scarification by sodium bicarbonate (NaHCO3) for five minutes (T3) and to chemical scarification by sodium hypochlorite and sodium bicarbonate, both for two minutes (T4). The experiment was completely randomized, organized into four replicates of 25 seeds. Nursery bags containing sand were used, watering and counting occurred on alternate days until the 40th day. The results were calculated for the final germination percentage and the average germination time of each treatment. The results were evaluated by ANOVA and by the Tukey test at 5%. Statistically only T4 differed from T1. The result achieved by this treatment was similar to that reached by group C. The best final germination percentage was for group C. T1 provided the lowest final germination percentage. T3 showed negative influence on germination. T4 presented better results. Mango seeds are negatively sensitive to T2 and T3 treatments. However, T4 promotes the dormancy break in values statistically similar to those reached by group C. T2 has not promoted good results and is not recommended.

MEMBROS DA BANCA:
Externo ao Programa - 1228866 - EDUARDO LUIZ VOIGT
Externo ao Programa - 1869376 - JOSE HAMILTON DA COSTA FILHO
Interno - 1674709 - VIVIANE SOUZA DO AMARAL