Data/hora: 04/06/2024 19:22:27

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 07/04/2004
Data da última atualização: | 07/04/2004
Autoria: | RODRIGUEZ, M. X; BUSCHMANN, H; IGLESIAS, C; BEECHING, J. R.
Afiliação: | CIAT,Colômbia.
Título: | Production of phytoalexins in cassava (Manihot esculenta cranz) root during post-harvest physiological deterioration.
Ano de publicação: | 1998
Fonte/Imprenta: | Revista Brasileira de Mandioca, Cruz das Almas, v.17, p.42, nov., 1998, Suplemento.
Idioma: | Inglês
Conteúdo: | Abstract: Cassava (Manihot esculenta Crantz) is one of the most importante food sources in tropical countries where it is grown by small farmers largely for their own or local consumption. A serious constraint to extending cassava's marketability and uses is the rapid post-harvest physiological deterioration (PPD) suffered by the roots. PPD involves the production of secondary metabolites such as flavonoids and coumarins (scopoletin, esculin and esculetin) whith have been reported to act as phytoalexins (low molecular weight anti-microbial compounds). We are testing the antimicrobial activity of ethanolic extracts of cassava roots undergoing PPD using different bioassays, such as spore germination percentage on concavity slides and chromatographed TLC plates). The antagonistic effects of cassava root extracts would suggest the occurence of a defence mechanism to wound infections occurring during harvesting, and storage of root tubers or post-harvest diseases as part of the PPD response.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (20921-1) - ADD - AP - -- - 633.68205 -  -  - DIS