Phosphatase activities of arbuscular mycorrhizal intraradical

van Aarle, Ingrid; Rouhier, Hervé; Saito, M (2002). Phosphatase activities of arbuscular mycorrhizal intraradical. Mycological Research, 106, (10), 1224 - 1224
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DOI:
| Published | English
Authors:
van Aarle, Ingrid ; Rouhier, Hervé ; Saito, M
Department:
Department of Biology
Microbial Ecology
Research Group:
Microbial Ecology
Abstract:
We investigated the influence of changes in external phosphorus (P) concentration on the proportion of phosphatase-active structures of the arbuscular mycorrhizal fungus Gigaspora margarita associated with Allium cepa. The P treatment was started when mycorrhizal colonisation had been established, and plant systems were harvested three times after the start of the P treatment. Higher shoot dry weights and P contents were observed in the high-P treated plants at the last harvest. We did not find any change in the proportion of phosphatase-active extraradical mycelium following P treatment. However, the proportion of alkaline phosphatase-active mycelium was positively correlated for extraradical and intraradical mycelium. Also, the proportion of alkaline phosphatase-active arbuscules seemed to increase with the shoot fresh weight, whereas the proportion of acid phosphatase-active arbuscules decreased with higher shoot P concentration and dry weight. We have shown experimentally that the intraradical mycelium of G. margarita, but not the extraradical mycelium, responds metabolically to plant P concentration, and possibly also to external P availability.
ISSN:
0953-7562
LUP-ID:
55c4ea32-ff9f-4875-978f-0b0514dfb952 | Link: https://lup.lub.lu.se/record/55c4ea32-ff9f-4875-978f-0b0514dfb952 | Statistics

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