Banca de DEFESA: ATÍLIO ALVARO DE JESUS ANDRADE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ATÍLIO ALVARO DE JESUS ANDRADE
DATE: 07/03/2024
TIME: 14:00
LOCAL: Universidade Federal de São João del - Rei/UFSJ
TITLE:

Interactions between carnivorous plants and their prey: a study of the attraction mechanisms of Drosera from Serra do Cipó, Minas Gerais.

KEY WORDS:

carnivorous plants, Drosera, insect-plant interaction, morphoanatomy, Serra do Cipó.

PAGES: 50
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

 

In this dissertation, histochemical and chromatographic investigations were carried out on
substances produced to possibly attract prey of Drosera quartzicola and Drosera tentaculata
(Droseraceae), two species of carnivorous plants, collected in Serra do Cipó National Park,
located in the central-eastern region of Minas Gerais. A survey of prey captured by Drosera
was also carried out, seeking to correlate whether the position of the leaf of each species (erect
or parallel to the ground) influences the quantity and diversity of prey captured. Histochemical
analyzes indicated the presence of phenols, acid lipids, mucilage, pectin, proteins, and steroids
in the tentacle heads of both species. These analyzes also indicated, in the trichomes in the
middle of the leaf blade, the presence of phenols, digestive enzymes, acid lipids and proteins
in both species. Furthermore, the presence of steroids, as well as resin acids, phenols and acid
lipids, was revealed in the trichomes of D. quartzicola. Digestive enzymes were evidenced in
the head of the tentacles and in trichomes in the middle of the leaf blade in both species. Gas
chromatography analyzes coupled to a mass detector were performed with the intention of
detecting volatiles produced by the species. However, the analyzes proved to be inconclusive.
It was also found that the position of the leaf influences the type of prey captured, with more
walking insects captured by species with leaves parallel to the ground, and more winged
insects captured by species with erect leaves. Species with erect leaves captured more prey,
and also a greater taxonomic diversity of insects, compared to species with leaves parallel to
the ground.

BANKING MEMBERS:
Presidente - 1870463 - CLEBER JOSE DA SILVA
Interno - 1398240 - JOSÉ ELVINO DO NASCIMENTO JUNIOR
Externo à Instituição - VINICIUS COELHO KUSTER