Banca de QUALIFICAÇÃO: NAAMA JESSICA DE ASSIS MELO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: NAAMA JESSICA DE ASSIS MELO
DATA: 26/03/2019
HORA: 09:00
LOCAL: Auditório - Prédio de Fitotecnia
TÍTULO:

Artigo 1 - REACTION OF PASSION FRUIT SPECIES INOCULATED WITH Fusarium oxysporum F. SP. passiflorae ISOLATES 

Artigo 2 - PHYSICAL-CHEMICAL CHARACTERIZATION OF YELLOW PASSION FRUIT PRODUCED IN DIFFERENT FORMS OF CULTIVATION

PALAVRAS-CHAVES:

Artigo 1 - Fusariosis; Pathogenicity; Passiflora cincinnata; Passiflora edulis.

 

Artigo 2 - Bioactive compounds; Grafting; Passiflora edulis f. flavicarpa; Postharvest.

PÁGINAS: 48
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
RESUMO:

Artigo 1 - In passion fruit culture, one of the main diseases that reduces production is fusariosis, caused by the fungus Fusarium oxysporum f. sp. passiflorae. The use of resistant rootstocks, for example the species Passiflora cincinnata, is one of the techniques used to control this disease. The objective of this work was to characterize the pathogenicity of different isolates of F. oxysporum f. sp. passiflorae in P. edulis and P. cincinnata in order to identify its potential for use in areas with a history of the disease. Thirteen isolates of the fungus were used and the inoculums produced at a concentration of 106 macroconidia mL-1. The seedlings of P. edulis and P. cincinnata were produced in coconut fiber and the root system was then immersed for five minutes in the conidial suspension before being replanted in the 770 mL pots. Two assays were carried out: one using P. edulis seedlings and the other with P. cincinnata. In both experiments ten replicates were used, for each isolate and for the control group. Seedlings were evaluated daily from the second after inoculation (DAI) until 90 DAI. All isolates were pathogenic in both Passiflora species, however incidence, severity and mortality were higher in P. edulis. There was no statistically significant difference for the incubation period of the disease in the two species used.

Artigo 2 - Grafting is widely used to provide tolerance to pests and diseases in yellow passion fruit, such as fusariosis, caused by the fungus Fusarium oxysporum f. sp. passiflorae. However, this practice may generate some changes in the postharvest characteristics. The objective of this work was to verify the postharvest quality (physical and chemical) of fruits of P. edulis collected inmature and mature in four areas with different forms of cultivation (conventional without grafting, conventional with grafting and organic with grafting). The experiment was installed in a completely randomized design, in a 4 x 2 factorial scheme, with five replicates of four fruits each. The first factor was the different collection sites with their cultivation systems and the second factor at maturity stage. The fruits were harvested transported to the Laboratory of Physiology and Technology Postharvest of Fruits of the Universidade Federal Rural do Semi-Árido (UFERSA), where they were selected and submitted to physical, physical-chemical and chemical analysis, bioactive compounds and antioxidant activity (ABTS and DPPH). Fruit weight, length, width and firmness were superior in fruits from conventional system, however fruit yield was inferior. Soluble solids, pH, reducing sugars and total soluble sugars were superior in fruits from collection sites with the use of grafting. Bioactive compounds and antioxidant activity were similar between the fruits from different collection sites.

MEMBROS DA BANCA:
Externo à Instituição - JOSÉ DARCIO ABRANTES SARMENTO - NENHUMA
Presidente - 1445570 - RUI SALES JUNIOR
Externo ao Programa - 1221323 - SELMA ROGERIA DE CARVALHO NASCIMENTO