The differential effects of cell wall-associated phenolics, cell walls, and cytosolic phenolics of host and non-host roots on the growth of two species of AM fungi

The differential effects of cell wall-associated phenolics, cell walls, and cytosolic phenolics of host and non-host roots on the growth of two species of AM fungi

Experiments were conducted to test the hypothesis that cellular compounds, especially wall-associated compounds, released during emergence of secondary roots, stimulate the growth of arbuscular mycorrhizal (AM) fungi. Purified cell walls, crude cell-wall extracts, crude cytoplasmic extracts, and phe...

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Veröffentlicht in:The New phytologist. - 1979. - 133(1996), 2 vom: 10. Juni, Seite 289-294
1. Verfasser: Douds, D D Jr (VerfasserIn)
Weitere Verfasser: Nagahashi, G, Abney, G D
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1996
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Gigaspora gigantea Gigaspora margarita hyphal growth mycorrhiza phenolics
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520 |a Experiments were conducted to test the hypothesis that cellular compounds, especially wall-associated compounds, released during emergence of secondary roots, stimulate the growth of arbuscular mycorrhizal (AM) fungi. Purified cell walls, crude cell-wall extracts, crude cytoplasmic extracts, and phenolic compounds previously identified as cell wall-associated, from Ri T-DNA-transformed roots of host (Daucus carota L.) and non-host (Beta vulgaris L.) were incorporated into growth medium and tested for their effects upon growth of the AM fungi Gigaspora gigantea (Nicol. & Gerd.) Gerdemann and Trappe and Gigaspora margarita Becker and Hall. Purified cell walls of both plants had little effect on G. gigantea but non-host cell walls inhibited the growth of G. margarita. Ferulic acid, a major constituent of non-host root, depressed the growth of both fungi. Nothing tested which was unique to the non-host root affected hyphal growth to the point that contact would be prohibited. Caffeic acid, found in D. carota cytoplasm, also depressed growth of both fungi. Para-hydroxybenzoic acid, a constituent of D. carota roots, stimulated growth of G. margarita hyphae, but did not affect hyphal growth of G. gigantea. Vanillic acid, unique to D. carota root cell-wall extracts, stimulated hyphal growth and branching of both fungi, and should increase the probability of contact between fungus and host root 
650 4 |a Journal Article 
650 4 |a Gigaspora gigantea 
650 4 |a Gigaspora margarita 
650 4 |a hyphal growth 
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650 4 |a phenolics 
700 1 |a Nagahashi, G  |e verfasserin  |4 aut 
700 1 |a Abney, G D  |e verfasserin  |4 aut 
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