Common arbuscular mycorrhizal networks amplify competition for phosphorus between seedlings and established plants

© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 200(2013), 1 vom: 06. Okt., Seite 229-240
1. Verfasser: Merrild, Marie P (VerfasserIn)
Weitere Verfasser: Ambus, Per, Rosendahl, Søren, Jakobsen, Iver
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Cucumis sativus (cucumber) Solanum lycopersicon (tomato) arbuscular mycorrhizal fungi common mycorrhizal networks competition for phosphorus seedling growth Phosphorus 27YLU75U4W mehr... Carbon 7440-44-0
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245 1 0 |a Common arbuscular mycorrhizal networks amplify competition for phosphorus between seedlings and established plants 
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520 |a © 2013 The Authors. New Phytologist © 2013 New Phytologist Trust. 
520 |a Common mycorrhizal networks (CMNs) influence competition between plants, but reports regarding their precise effect are conflicting. We studied CMN effects on phosphorus (P) uptake and growth of seedlings as influenced by various disruptions of network components. Tomato (Solanum lycopersicon) seedlings grew into established networks of Rhizophagus irregularis and cucumber (Cucumis sativus) in two experiments. One experiment studied seedling uptake of (32)P in the network in response to cutting of cucumber shoots; the other analysed seedling uptake of P and nitrogen (N) in the presence of intact or severed arbuscular mycorrhizal fungus networks and at two soil P concentrations. Pre-established and intact networks suppressed growth of tomato seedlings. Cutting of cucumber shoots mitigated P deficiency symptoms of seedlings, which obtained access to P in the extraradical mycelium and thereby showed improved growth. Solitary seedlings growing in a network patch that had been severed from the CMN also grew much better than seedlings of the corresponding CMN. Interspecific and size-asymmetric competition between plants may be amplified rather than relaxed by CMNs that transfer P to large plants providing most carbon and render small plants P deficient. It is likely that grazing or senescence of the large plants will alleviate the network-induced suppression of seedling growth 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Cucumis sativus (cucumber) 
650 4 |a Solanum lycopersicon (tomato) 
650 4 |a arbuscular mycorrhizal fungi 
650 4 |a common mycorrhizal networks 
650 4 |a competition for phosphorus 
650 4 |a seedling growth 
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650 7 |a Carbon  |2 NLM 
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700 1 |a Ambus, Per  |e verfasserin  |4 aut 
700 1 |a Rosendahl, Søren  |e verfasserin  |4 aut 
700 1 |a Jakobsen, Iver  |e verfasserin  |4 aut 
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773 1 8 |g volume:200  |g year:2013  |g number:1  |g day:06  |g month:10  |g pages:229-240 
856 4 0 |u http://dx.doi.org/10.1111/nph.12351  |3 Volltext 
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