| Autor: |
Elisabeth Görge, Rüdiger Kape, Martin Parniske, Dietrich Werner, Astrid Wetzel, Kerstin Wex |
| Rok vydání: |
1993 |
| Předmět: |
|
| Zdroj: |
Journal of Plant Physiology. 141:54-60 |
| ISSN: |
0176-1617 |
| DOI: |
10.1016/s0176-1617(11)80851-5 |
| Popis: |
Summary The communication by phenylpropane-metabolites between symbiotic microorganisms and their legume host plants was further studied by the elucidation of root segment-specific exudation of aromatic compounds. The excreted flavonoids were collected by blotting seedling roots directly onto cellulose acetate filters. The flavonoids were eluted from filter segments and subsequently analysed by capillary electrophoresis. Effects of various flavonoids on VA-mycorrhiza (VAM) development were studieti. Glomus mosseae and Glomus intraradix (Schenck and Perez, 1990) were used in these studies. Daidzein (2 to 5 µM) increased germination of spores in a period between 15 to 30 days. Myricetin increased hyphal growth of germinated spores at a concentration of 2 µM between 20 and 50 days. Quercetin had a similar effect in a concentration range of 0.8 to 2.0 µM, whereas 5 µM slightly inhibited the growth of hyphae from the germinating spores. Phytoalexin production in VA-mycorrhiza infected legume roots was studied with Vicia faba by wyerone concentration to quantify the reaction of a non-aromatic secondary root metabolite. VAM infected roots increased wyerone concentration by a factor of 3 to 5 compared with the control, however, at a very low absolute level. A phenylpropane-communication concept for Rhizobium infected legumes is discussed in relation to a still incomplete similar scheme for VAM. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
