Análise por CLAE/EM, Investigação do Efeito Fitotóxico e da Atividade Larvicida de Tetrapterys anisoptera (Malpighiaceae)

Resumo

Tetrapterys anisoptera belongs to the Malpighiaceae family, with limited knowledge concerning its
chemical constitution and bioactive properties. This genus is recognised for its toxicity to ruminants. Given
the significance of comprehending the chemical constituents of this species and their associated biological
functions, the present study endeavoured to explore the chemical diversity of T. anisoptera. It aimed to
assess its potential as a larvicide against Aedes aegypti mosquitoes and to evaluate the allelopathic potential
of its leaf extracts against Senna obtusifolia species. Crude extracts of the plant’s leaves, specifically in
ethyl acetate, methanol, and aqueous solvents, were subjected to chemical characterisation via Liquid
Chromatography Coupled to Mass Spectrometry. This analytical approach unveiled the presence of
various compounds, including catechin, muchronatin B, gambiriin C, glycosidic apigenin, glycosidic
luteolin, vicenin II, leucenin II, and quercetin-3-O-neohesperidoside. Notably, this marks the first
annotation of these compounds within the context of T. anisoptera. Regarding the larvicidal assessment
against A. aegypti larvae, the extracts from T. anisoptera demonstrated negligible activity, exhibiting no
significant impact on larval development. Nonetheless, the ethyl acetate extract displayed an average
mortality rate of 46%. Turning to the allelopathic evaluation, the outcomes indicated that the leaf extract
of T. anisoptera exhibited a low potential for inhibiting germination. In summary, this study stands as
the initial documented instance elucidating the chemical composition of T. anisoptera, alongside the
evaluation of its biological, allelopathic, and larvicidal activities.