Banca de DEFESA: THAYNA FERREIRA DA CRUZ

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : THAYNA FERREIRA DA CRUZ
DATE: 26/05/2023
TIME: 14:00
LOCAL: Sala Virtual - Meet
TITLE:

ENTOMOPATHOGENIC FUNGI AS GROWTH PROMOTERS IN JAMBU PLANTS (Acmella oleracea (L.) R. K. Jansen)

KEY WORDS:

Protected system; Gas exchange; Microorganisms; Carbohydrates; Biomass; Phosphate solubilization; IAA.

PAGES: 63
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Entomologia Agrícola
SUMMARY:

The jambu Acmella oleracea (L.) R.K.Jansen is a vegetable of great economic importance in the northern region of Brazil, however, its growth and productivity are using several chemical applications, such as fertilizer and, insecticides among others, which can be replaced by products based on microorganisms that stimulate plant production. The objective was to evaluate the growth promotion through biometric, physiological, and biochemical parameters, after the application of entomopathogenic fungi in protected and non-protected planting systems, in two cycles of cultivation. To characterize the entomopathogenic fungi regarding the production of indol-acetic acid (IAA) and phosphate solubilization. The bioassays were conducted in a commercial area of periurban agriculture, in protected and unprotected raised beds, in two cycles, period of March and September, with a randomized block design, using three inoculants: Metarhizium anisopliae, Beauveria bassiana, Trichoderma asperelium (Pool UFRA T06, UFRA T09, UFRA T12, UFRA T52), and control with water. The data of biometry, biomass, gas exchange, chlorophyll, carbohydrates, and characterization of the isolates regarding phosphate solubilization and EIA production, were examined by the F. test (P ≤ 0.05). The results obtained in the comparison between the systems, in the first cycle, were that the growth parameters showed significant results, where the protected system showed an increase in most variables evaluated, compared to the non-protected. The best treatment was with M. anisopliae, compared to the control and T. asperellum. In the second cycle, there was a significant difference for all variables (p<0.05). Furthermore, these isolates were able to increase the levels of chlorophyll a and b and sucrose of jambu plants. We conclude that the best planting system for jambu culture is the protected cultivation, in two cycles of cultivation, and that the fungi M. anisopliae and B. bassiana. promote plant growth through increases in biomass, gas exchange, chlorophyll a and b, and sucrose in jambu plants, especially in the first cycle. And that these fungal isolates are phosphate solubilizers and IAA producers.

 

BANKING MEMBERS:
Presidente - 3266519 - TELMA FATIMA VIEIRA BATISTA
Externo à Instituição - DENISE CASTRO LUSTOSA - UFOPA
Externo à Instituição - ITALO MARLONE GOMES SAMPAIO - SEDAP
Externo à Instituição - SERGIO ANTONIO LOPES DE GUSMAO