Banca de DEFESA: JOANA DUBOC BASTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JOANA DUBOC BASTOS
DATA : 29/04/2020
HORA: 09:00
LOCAL: https://conferenciaweb.rnp.br/webconf/norma-gouvea-rumjanek
TÍTULO:

Influence of the agricultural system on the phenolic compound concentrations of the medicinal plants: guaco (Mikania spp) and pitanga (Eugenia uniflora)

PALAVRAS-CHAVES:

soil fertility, agricultural management, agricultural landscape

PÁGINAS: 60
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Manejo e Tratos Culturais
RESUMO:

The use of nature for therapeutic purposes is as old as humanity, where medicinal plants play a special role. The plant therapeutic agents aim to prevent, cure and mitigate the symptoms of diseases at a low cost when compared to drugs obtained through chemical reactions. The production and commercialization of medicinal plants and their derivatives has been gaining more and more space in Brazil, due to its wide genetic and biocultural heritage. Therapeutic agents come from the secondary metabolism of plant species, which are not always expressed on the same conditions that are ideal for the full development and productivity of the crop. Therefore, the present work aims to associate the knowledge, within the scope of the agricultural landscape management system, with the factors that influence the total phenolic synthesis, to advance on the design of agro-ecosystems capable of producing raw material with high levels of the therapeutic agent. The research was conducted in a participatory manner with farmers from Seropédica / RJ. Twenty-three production units containing guaco (Mikania spp) and / or pitanga (Eugenia uniflora) tree under different management conditions were selected, totaling 11 and 12 samples of each species, respectively. Semi-structured interviews and participant observation were carried out comprehending a description of the environment and a survey of knowledge about the cultivation of medicinal plants, as well as their management strategies. These parameters were used to define the management intensity and environmental disturbance indices. Four leaf samples were collected during each season for determination of total phenolic concentrations (TF) and two soil samples were collected for fertility analysis, during winter and summer. Variance analysis were carried out on the the fertility parameters. Qualitative and quantitative data were processed using Generalized Linear Models (GLM) to identify the factors that significantly influence the phenolic compounds content. Guaco produced in areas with higher concentrations of calcium, potassium and shading levels, showed a higher content of TF, while the higher pruning frequency, the plant cultivation time in the production unit and higher concentrations of phosphorus resulted on lower content of TF. As for pitanga tree, the main factors that led to higher levels of TF were increased diversification, increased concentration of organic carbon and lower concentrations of calcium, potassium and magnesium. As a conclusion, each species had a different behavior depending on the factors analyzed and this knowledge is crucial to define management recommendations. For guaco and pitanga, shading intensity, diversification level and specific nutritional requirements for fertilization showed the highest influence on the TF concentrations.

MEMBROS DA BANCA:
Presidente - 345.536.817-49 - NORMA GOUVÊA RUMJANEK - EMBRAPA
Externo ao Programa - 1705075 - DOUGLAS SIQUEIRA DE ALMEIDA CHAVES
Externa à Instituição - FERNANDA SAVICKI DE ALMEIDA