Synergism between blue light and root exudate compounds and evidence for a second messenger in the hyphal branching response ofGigaspora gigantea
| Autor: | Gerald Nagahashi, David D. Douds |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
0106 biological sciences
0301 basic medicine Hyphal growth Exudate Hypha Physiology Fungus Biology Branching (polymer chemistry) 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Gigaspora gigantea Botany Genetics medicine Molecular Biology Ecology Evolution Behavior and Systematics Blue light fungi Cell Biology General Medicine 030108 mycology & parasitology biology.organism_classification Second messenger system Biophysics medicine.symptom |
| Zdroj: | Mycologia. 96:948-954 |
| ISSN: | 1557-2536 0027-5514 |
| DOI: | 10.1080/15572536.2005.11832894 |
| Popis: | Light and chemical components of the host root exudate can induce hyphal growth and branching of arbuscular mycorrhizal fungi. Compounds that induce the same morphogenetic or biochemical response as light are referred to as photo-mimetic compounds (PCs). This is the first report of a synergistic response by Gigaspora gigantea, an arbuscular mycorrhizal fungus, to blue light and naturally occurring photomimetic compounds isolated from the exudate of host roots. The blue light treatment and exposure to photomimetic compounds were effective whether applied sequentially or simultaneously. The number of hyphal branches induced by blue light and photomimetic compounds together was greater than the sum of the branches generated by each separate treatment, and the synergism was greatest at the higher levels or orders of branches. The fact that blue light and PCs, individually, triggered the same hyphal branching response and when given together, they produced a synergistic response, indicated the activation of a second messenger in the induced-branching process. Delaying the application of PCs, after the initial light exposure, showed the second messenger was stable up to 3 h. |
| Databáze: | OpenAIRE |
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