Differential Effect of Purified Spruce Chitinases and β-1,3-Glucanases on the Activity of Elicitors from Ectomycorrhizal Fungi
| Autor: | A. Sirrenberg, Achim Hager, Peter Salzer, B. Hubner |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Hypha
Physiology Amanita Molecular Sequence Data Chitin Plant Science Chromatography Affinity Trees Microbiology Fungal Proteins Genetics Amino Acid Sequence Symbiosis Cells Cultured Mycelium Sequence Homology Amino Acid biology Basidiomycota beta-Glucosidase Chitinases fungi Hebeloma crustuliniforme food and beverages Glucan 1 3-beta-Glucosidase Chromatography Ion Exchange biology.organism_classification Elicitor Isoenzymes Molecular Weight Suillus variegatus Chitinase biology.protein Hebeloma Sequence Alignment Amanita muscaria Research Article |
| Zdroj: | Plant Physiology. 114:957-968 |
| ISSN: | 1532-2548 0032-0889 |
| DOI: | 10.1104/pp.114.3.957 |
| Popis: | Two chitinases (EC 3.2.1.14) and two β-1,3-glucanases (EC 3.2.1.39) were purified from the culture medium of spruce (Picea abies [L.] Karst.) cells to study their role in modifying elicitors, cell walls, growth, and hyphal morphology of ectomycorrhizal fungi. The 36-kD class I chitinase (isoelectric point [pl] 8.0) and the 28-kD chitinase (pl 8.7) decreased the activity of elicitor preparations from Hebeloma crustuliniforme (Bull. ex Fries.) Quel., Amanita muscaria (L.) Pers., and Suillus variegatus (Sw.: Fr.) O.K., as demonstrated by using the elicitor-induced extracellular alkalinization in spruce cells as a test system. In addition, chitinases released monomeric products from the walls of these ectomycorrhizal fungi. The β-1,3-glucanases (35 kD, pl 3.7 and 3.9), in contrast, had little influence on the activity of the fungal elicitors and released only from walls of A. muscaria some polymeric products. Furthermore, chitinases alone and in combination with β-1,3-glucanases had no effect on the growth and morphology of the hyphae. Thus, it is suggested that apoplastic chitinases in the root cortex destroy elicitors from the ectomycorrhizal fungi without damaging the fungus. By this mechanism the host plant could attenuate the elicitor signal and adjust its own defense reactions to a level allowing symbiotic interaction. |
| Databáze: | OpenAIRE |
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