Banca de QUALIFICAÇÃO: JÉSSICA PALOMA GAMA DOS SANTOS SILVA

ECOPHYSIOLOGY AND CHEMICAL COMPOSITION OF ESSENTIAL OILS OF SPECIES OF THE GENDER 
SPECIES FROM ORGANIC PRODUCTION IN DOWNTOWN AMAZONAS

Gas exchange; phytochemistry; citriculture; metabolic pathways; limonene.

Citrus plants are species or hybrids of the Rutaceae family belonging to the genera Citrus, Fortunella and Poncirus. Many species of these genera produce essential oils, whose chemical compositions are responsible for the characteristic aroma of each species. Essential oils are composed of volatile secondary metabolites, and their characteristics depend on several factors such as the species, the part of the plant in which it occurs and the environmental conditions in which they are found. Studies of the plant-environment relationship using physiological indicators are interesting tools for understanding an ecosystem or a culture in terms of vitality, productivity, sensitivity and resistance to environmental stresses. Research that associates the production and chemical composition of essential oils to physiological indicators in the face of environmental variations is highlighted for demonstrating the relationship between abiotic factors on plant metabolism, especially secondary metabolism. There is a lack of studies on the physiological responses of Citrus species to the environmental conditions of the Lower Amazon region, and how this is reflected in the production and chemical composition of essential oils in these species. For this reason, the objective of this research is to relate ecophysiological parameters to the production and chemical composition of essential oil from different species of citrus from organic production at two times of the year and to produce information for the strengthening of the citrus production chain in the west of the state of Pará To this end, gas exchange measures, nitrogen balance indexes, chlorophyll and polyphenols of commercial species of citrus plants will be used as a function of seasonality, correlating with production characteristics and chemical constitution of the essential oils of the selected species in rural production properties in the city of Mojuí dos Campos.