Damage and drying modify the composition of Mikania glomerata and Mikania laevigata leaves
Rev. bras. farmacogn
;
29(6): 793-797, Nov.-Dec. 2019. graf
Artigo
em Inglês
|
LILACS-Express
| LILACS
| ID: biblio-1057859
ABSTRACT
ABSTRACT This study compared the influence of mechanical damage and drying on the chemical composition of Mikania glomerata Spreng. and Mikania laevigata Sch.Bip. ex Baker, Asteraceae, leaves. Leaves were collected 1-24 h after damage. Oven-drying at 40ºC and shade-drying at ambient temperature were compared to lyophilization. Samples were extracted in 70% ethanol and analyzed by ultra-high-performance liquid chromatography with mass spectrometry. Significant (p < 0.05) increases of caffeoylquinic acids were observed in damaged leaves of both species and coumarin decreased in M. laevigata, indicating stress. Although the final water content was similar, the drying method affected the leaf composition. In shade-dried leaves of M. laevigata coumarin decreased and the presence of umbelliferone was observed; caffeoylquinic acid contents increased for 288 h in in both species. Apparently, enzymes were inactivated after 6 h in oven drying, stabilizing their chemical composition, while shade drying allowed enzymatic and microbial activity to continue; illustrating the importance of post harvesting procedures on the quality of medicinal plants.
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Índice:
LILACS (Américas)
Idioma:
Inglês
Revista:
Rev. bras. farmacogn
Assunto da revista:
Farmácia
Ano de publicação:
2019
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Estadual de Campinas/BR
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