Name: Paula Roberta Costalonga Pereira
Type: MSc dissertation
Publication date: 17/12/2021
Advisor:

Name	Role
Maria do Carmo Pimentel Batitucci	Advisor *

Examining board:

Name	Role
Hildegardo Seibert França	Internal Examiner *
JEAN CARLOS VENCIONECK DUTRA	External Examiner *
Juliana Macedo Delarmelina	External Alternate *
Maria do Carmo Pimentel Batitucci	Advisor *
Silvia Tamie Matsumoto	Internal Alternate *

Summary: The banana, Musa spp., is cultivated in practically all tropical countries, due to
its constant heat requirement and high humidity, favorable conditions for its
good growth. It is an important fruit in developing countries due to its ease of
cultivation, convenience to consume, relatively low prices and high nutritional
value. Therefore, its study is understood as having high social relevance,
especially for locations WHERE socioeconomic development also takes place
through agricultural activity, such as in Brazil. However, in view of the growing
global demand and increasing consumption requirements, choosing the type of
cultivar that is most appropriate for a given environment and production system
is of great importance for obtaining good productivity. Thus, the present study
aimed to compare the phytochemical aspects and biological activities of ethanol
extracts from the peel and pulp of four genotypes of Musa sp. in stage 3 of
maturation, two commercial cultivars (Terrinha and Grand Naine) and two new
cultivars (Red Yade and Ambrosia) selected by INCAPER, under different
irrigation conditions. For this, the quantification of the total contents of phenolic
compounds, flavonoids and tannins was carried out, and the evaluation of
antioxidant activities was carried out using the ABTS, DPPH and Fe 2+ ion
chelating methods. The phytochemical analyzes revealed that, in general, the
peel extracts of banana cultivars concentrated higher levels of phenolic
compounds, and the drought condition was an inducer of compound
accumulation. With emphasis on the cultivar Terrinha, which presented the
highest values of phenols, flavonoids and total tannins. Regarding the
antioxidant potential, the peel extracts showed better activities, demonstrating
that the presence of bioactive compounds influenced better responses of these
extracts in the antioxidant action. These results indicate that banana peel is a
potential natural source of bioactive compounds that can be an alternative to
nutraceutical or pharmacological resources.

Keywords: ABTS • Antioxidant activity • DPPH • Phenolic compounds • Stress.