Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella

Höpfner I, Beyschlag W, Bartelheimer M, Werner C, Unger S (2015)
Plant Ecology 216(6): 887-899.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Höpfner, IngoUniBi; Beyschlag, WolframUniBi; Bartelheimer, Maik; Werner, Christiane; Unger, StephanUniBi
Abstract / Bemerkung
Arbuscular mycorrhizal fungi (AMF) may serve as an effective substitute for root surface. As mycorrhizal benefits are related to nutrient availability, the trade-off between carbon investments into AMF versus roots may drive competitive interactions. We studied competitive interactions between mycorrhizal and non-mycorrhizal individuals of Hieracium pilosella L. and Plantago lanceolata L., species differing in both mycotrophic degree and carbon allocation to roots. Three fertilization treatments were used to simulate nutritional differences over the course of succession. Species-specific differences in mycotrophy were reflected in markedly larger root/shoot allocation in P. lanceolata and higher mycorrhizal growth dependency in H. pilosella. P. lanceolata dominated competition in all fertilizer treatments, enabled by its comparatively larger root biomass allocation. In contrast, under intermediate and high fertilization, H. pilosella exhibited large investments into clonal shoot growth rather than in roots. Unexpectedly, the competitive imbalance between both species was amplified by the presence of AMF. The poor competitive strength of H. pilosella indicates that AMF-dominated foraging can be less effective than root-dominated foraging in competitive interactions, particularly under high nutrient availabilities. However, the competitive imbalance was reduced in favor of H. pilosella under nutrient deficiency. Our results lend support to the idea of differing competitive success of mycorrhizal- versus root-based foraging strategy over a nutritional gradient, which may play a role in the natural distribution of species over the course of succession.
Stichworte
Plantago lanceolata; Hieracium pilosella; Competitive interactions; Soil nutrient availability; Biomass allocation; Mycorrhizal dependency
Erscheinungsjahr
2015
Zeitschriftentitel
Plant Ecology
Band
216
Ausgabe
6
Seite(n)
887-899
ISSN
1573-5052
Page URI
https://pub.uni-bielefeld.de/record/2733222

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Höpfner I, Beyschlag W, Bartelheimer M, Werner C, Unger S. Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella. Plant Ecology. 2015;216(6):887-899.
Höpfner, I., Beyschlag, W., Bartelheimer, M., Werner, C., & Unger, S. (2015). Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella. Plant Ecology, 216(6), 887-899. doi:10.1007/s11258-015-0476-6
Höpfner, I., Beyschlag, W., Bartelheimer, M., Werner, C., and Unger, S. (2015). Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella. Plant Ecology 216, 887-899.
Höpfner, I., et al., 2015. Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella. Plant Ecology, 216(6), p 887-899.
I. Höpfner, et al., “Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella”, Plant Ecology, vol. 216, 2015, pp. 887-899.
Höpfner, I., Beyschlag, W., Bartelheimer, M., Werner, C., Unger, S.: Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella. Plant Ecology. 216, 887-899 (2015).
Höpfner, Ingo, Beyschlag, Wolfram, Bartelheimer, Maik, Werner, Christiane, and Unger, Stephan. “Role of mycorrhization and nutrient availability in competitive interactions between the grassland species Plantago lanceolata and Hieracium pilosella”. Plant Ecology 216.6 (2015): 887-899.

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