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Arbuscular mycorrhizal fungi reveal distinct patterns of anastomosis formation and hyphal healing mechanisms between different phylogenic groups

De Souza, F.A. and Fernández, F. and Delmas, N. S. and Declerck, S. (2005) Arbuscular mycorrhizal fungi reveal distinct patterns of anastomosis formation and hyphal healing mechanisms between different phylogenic groups. New Phytologist, 165, 261-271. ISSN 0028-646X.

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Official URL: http://dx.doi.org/10.1111/j.1469-8137.2004.01236.x

Abstract

The significance of anastomosis formation and the hyphal healing mechanism (HHM) for functionality and integrity of the arbuscular mycorrhizal (AM) fungal mycelial network remains poorly documented. Four Glomeraceae and three Gigasporaceae were cultured monoxenically. Anastomosis formation was assessed using the grid line method, while HHM was time-lapse monitored. In intact mycelial networks, the number of anastomosis per hyphal length was higher for Glomeraceae than for Gigasporaceae strains. Glomeraceae strains studied always formed anastomosis between different hyphae, whereas anastomosis in the Gigasporaceae more often concerned hyphal bridges within the same hyphae. In both families the HHM corresponded to a four-step process; first septum formation; second initiation of growing hyphal tips (GHTs); third GHT elongation, orientation and contact; and f The type and number of anastomosis per hyphal length, and the HHM differed considerably between Glomeraceae and Gigasporaceae families representing a supplementary character that distinguishes these two families and may be of significance in ecological studies of AM fungi. [KEYWORDS: anastomosis ; arbuscular mycorrhizal (AM) fungi ; hyphal healing mechanism (HHM) ; monoxenic culture ; spitzenkörper]

Item Type:Article
ID Code:11684
Deposited On:23 Nov 2011 01:00
Last Modified:24 Apr 2012 16:32

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