Pectin degradation during root decay of rubber trees by Rigidoporus lignosus
| Autor: | Nicole Benhamou, Michel Nicole |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
food.ingredient
Pectin CYTOCHIMIE Plant Science Biology CHAMPIGNON PARASITE complex mixtures POURRIDIE BLANC MICROSCOPIE ELECTRONIQUE A TRANSMISSION RELATION HOTE PARASITE chemistry.chemical_compound food Botany Pectinase Cellulose MECANISME DE DEFENSE Middle lamella METHODE D'ANALYSE fungi food and beverages Xylem HEVEA PECTINE ACIDE POLYGALACTURONIQUE biology.organism_classification RACINE MARQUAGE chemistry MICROGRAPHIE ELECTROPHORESE CELLULOSE Cytochemistry PATHOLOGIE VEGETALE Phloem Hevea brasiliensis ENZYME PECTINOLYTIQUE |
| Zdroj: | Canadian Journal of Botany. 71:370-378 |
| ISSN: | 0008-4026 |
| DOI: | 10.1139/b93-041 |
| Popis: | Aplysia gonad lectin, which binds polygalacturonic acid, was complexed to colloidal gold and used for localizing molecules that contain polygalacturonic acid in rubber tree roots infected with the white-rot root fungus Rigidoporus lignosus. Colonization of root tissues was associated with strong wall alteration of phloem cells and with degradation of the compound middle lamella in both the phloem (10 weeks after inoculation) and the xylem (15 weeks after inoculation). Our data suggest that pectin breakdown during root decay likely occurs after cellulose and lignin breakdown and may result from the fungal pectinase activities that were detected in vitro. Released pectin oligomers may act as inducers of both fungal laccase and of the tree defense system during root invasion. Key words: root rotting fungi, rubber, pectin, cellulose, cytochemistry. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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