Phosphatase activities of arbuscular mycorrhizal intraradical

Research output: Contribution to journalArticle

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.

Details

Authors
  • Ingrid van Aarle
  • Hervé Rouhier
  • M Saito
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Ecology
Original languageEnglish
Pages (from-to)1224
JournalMycological Research
Volume106
Issue number10
Publication statusPublished - 2002
Publication categoryResearch
Peer-reviewedYes

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Related research output

van Aarle, I., 2002, Microbial Ecology, Lund University. 126 p.

Research output: ThesisDoctoral Thesis (compilation)

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