Banca de QUALIFICAÇÃO: ELLEN CARLA GOMES BARNABÉ

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ELLEN CARLA GOMES BARNABÉ
DATA : 30/11/2020
HORA: 08:00
LOCAL: Tangará da Serra
TÍTULO:

ALTERNATIVE FOR THE MANAGEMENT OF ANTHRACNOSIS IN YELLOW PASSION FRUIT

PALAVRAS-CHAVES:

Passiflora edulis f. sp. flavicarpa, Colletotrichum, resistance induced, enzymatic analysis.

PÁGINAS: 58
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitossanidade
ESPECIALIDADE: Fitopatologia
RESUMO:

The yellow passion fruit (Passiflora edulis f. sp. flavicarpa) is the most produced passion fruit species in Brazil, wich is the largest producer and consumer of the fruit in the world. Brazilian orchards suffer from the attack of several diseases, including anthracnose (Colletotrichum spp.), a very aggressive disease that infects the entire aerial part of the plant. In view of the low efficiency of chemical control and the small progress in the genetic improvement of the species with regard to protection against this disease, resistance induction emerges as an alternative measure to be combined in the management of the disease. The products based on Acibenzolar-S-Methyl (ASM), citrus biomass (BMC) and Bacillus subtilis have been tested against several pathogenicities and them provided a significant increase in the synthesis of proteins related to pathogenicity. Therefore, the first paper aims to evaluate resistance induction as an alternative measure in the management of anthracnose in yellow passion fruit. The experiments were carried out in a protected culture in a completely randomized design, 6 inducers were used (ASM, Bacillus subtilis, ASM + B. subtilis, BMC, BMC + B. subtilis, pathogen) + additional control, with 3 replicates with 5 plants each. In each experiment a different species of Colletotrichum was used. The applications of the inducers were started at 57 days after transplantation and the plants were inoculated with the pathogen 24 hours after the application of the inducers. The collections for enzymatic dosage occurred at 24, 48, 72, 96 and 120 hours after the inoculation of the pathogen, the incidence was evaluated daily and the severity weekly after the application of the pathogen. The enzymes peroxidase (POX), polyphenoloxidase (PPO), β-1,3-glucanase (GLU) and phenylalanine ammonia lyase (FAL) were measured. Evaluations of the Chlorophyll Falker Index (ICF), plant height (AP), plant neck diameter (DC) and number of leaves (NC) were also carried out every two weeks. All inductors provided an increase in the content of the evaluated enzymes. Treatments containing ASM showed lower ICF. In the first experiment, the ASM treatment provided greater AP and greater NF. In the second experiment, ASM showed lower NF at the end of the evaluations. The inducers were efficient in promoting enzymes involved in the immune response, however, it was not possible to clearly estimate the protection promoted by them. The objective of the second article was to verify the protective action of inducers on yellow passion fruit on anthracnose. The experiment was conducted in a completely randomized design consisting of 7 treatments and 5 repetitions. ASM, Bacillus subtilis, ASM + B. subtilis, BMC, BMC + B. subtilis and the pathogen without application of inductors were used as inducers, as well as a control without application of inductors and without inoculation of the pathogen. Detached leaves were used, which were disinfected, sprayed with inductors (or sterile distilled water), challenged with C. brevisporum and C. truncatum and kept under controlled light and temperature. The severity of the disease, AACPS, germination, the formation of appressoria and the penetration of the pathogen were evaluated.

MEMBROS DA BANCA:
Presidente - 138379001 - DEJANIA VIEIRA DE ARAUJO
Interno - 101366004 - MONICA JOSENE BARBOSA PEREIRA
Externo à Instituição - BEATRIZ MEIRELES BARGUIL - UESPI