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

Höpfner, Ingo; Beyschlag, Wolfram; Bartelheimer, Maik; Werner, Christiane; Unger, Stephan

doi:10.1007/s11258-015-0476-6

Cited by 16 publications

(13 citation statements)

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“…Although colonization was very high in all treatments, there was no pronounced effect of shade and P fertilization on productivity of H. pilosella when mycorrhizal (Figure 1C ). H. pilosella , being an obligate mycotrophic species without the ability to sustain growth and reproduction without an AMF symbiont (Höpfner et al, 2014 , 2015 ), revealed distinctly positive MGDs in all treatments and significantly higher amounts of tissue P in the AM than in the NM state. Nevertheless, treatments affected P-acquisition, with plant P in AM H. pilosella being highest in light and lowest in shade (Supplementary Table S1 ).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, Wilson et al ( 2006 ) found that the majority of mycorrhizal P transfer in common mycelial networks was directed to the more responsive species. On the other hand, Höpfner et al ( 2015 ) showed AM H. pilosella to suffer from competition with Plantago lanceolata , a less mycotrophic species pursuing a more root-dominated foraging strategy. This indicates that AMF-dominated foraging can be less effective than root-dominated foraging in competitive interactions, particularly under high nutrient availabilities.…”

Section: Discussionmentioning

confidence: 99%

“…Since AMF are able to form common mycelial networks (e.g., Smith and Read, 2008 ) interconnecting different plant species, they can affect plant-plant interactions belowground. Although, the importance of AMF for mediating competition (e.g., Facelli et al, 2010 ) has long been recognized (e.g., Wagg et al, 2011 ; Hart et al, 2013 ; Höpfner et al, 2015 ), our understanding of the underlying mechanisms is still poor (Smith et al, 2010 ), particularly regarding the role of environmental factors altering the mutualism-parasitism continuum in AMF symbioses.…”

Section: Introductionmentioning

confidence: 99%

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Conditions Promoting Mycorrhizal Parasitism Are of Minor Importance for Competitive Interactions in Two Differentially Mycotrophic Species

et al. 2016

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Interactions of plants with arbuscular mycorrhizal fungi (AMF) may range along a broad continuum from strong mutualism to parasitism, with mycorrhizal benefits received by the plant being determined by climatic and edaphic conditions affecting the balance between carbon costs vs. nutritional benefits. Thus, environmental conditions promoting either parasitism or mutualism can influence the mycorrhizal growth dependency (MGD) of a plant and in consequence may play an important role in plant-plant interactions. In a multifactorial field experiment we aimed at disentangling the effects of environmental and edaphic conditions, namely the availability of light, phosphorus and nitrogen, and the implications for competitive interactions between Hieracium pilosella and Corynephorus canescens for the outcome of the AMF symbiosis. Both species were planted in single, intraspecific and interspecific combinations using a target-neighbor approach with six treatments distributed along a gradient simulating conditions for the interaction between plants and AMF ranking from mutualistic to parasitic. Across all treatments we found mycorrhizal association of H. pilosella being consistently mutualistic, while pronounced parasitism was observed in C. canescens, indicating that environmental and edaphic conditions did not markedly affect the cost:benefit ratio of the mycorrhizal symbiosis in both species. Competitive interactions between both species were strongly affected by AMF, with the impact of AMF on competition being modulated by colonization. Biomass in both species was lowest when grown in interspecific competition, with colonization being increased in the less mycotrophic C. canescens, while decreased in the obligate mycotrophic H. pilosella. Although parasitism-promoting conditions negatively affected MGD in C. canescens, these effects were small as compared to growth decreases related to increased colonization levels in this species. Thus, the lack of plant control over mycorrhizal colonization was identified as a possible key factor for the outcome of competition, while environmental and edaphic conditions affecting the mutualism-parasitism continuum appeared to be of minor importance.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Conditions Promoting Mycorrhizal Parasitism Are of Minor Importance for Competitive Interactions in Two Differentially Mycotrophic Species

et al. 2016

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“…The two target species used here are highly mycotrophic, and AM fungi have previously been shown to improve the competitive ability of H. pilosella (Höpfner et al . ). In the present case, mycorrhizal benefit was reduced in female but not in male A. dioica when competing with H. pilosella .…”

Section: Discussionmentioning

confidence: 97%

Competitive interactions are mediated in a sex‐specific manner by arbuscular mycorrhiza in Antennaria dioica

2016

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ABSTRACT• Plants usually interact with other plants, and the outcome of such interaction ranges from facilitation to competition depending on the identity of the plants, including their sexual expression. Arbuscular mycorrhizal (AM) fungi have been shown to modify competitive interactions in plants. However, few studies have evaluated how AM fungi influence plant intraspecific and interspecific interactions in dioecious species.• The competitive abilities of female and male plants of Antennaria dioica were examined in a greenhouse experiment. Females and males were grown in the following competitive settings: (i) without competition, (ii) with intrasexual competition, (iii) with intersexual competition, and (iv) with interspecific competition by Hieracium pilosella -a plant with similar characteristics to A. dioica. Half of the pots were grown with Claroideoglomus claroideum, an AM fungus isolated from the same habitat as the plant material. We evaluated plant survival, growth, flowering phenology, and AM fungal structure production.• Plant survival was unaffected by competition or AM fungi. Competition and the presence of AM fungi reduced plant biomass. However, the sexes responded differently to the interaction between fungal and competition treatments. Both intraand interspecific competition results were sex-specific, and in general, female performance was reduced by AM colonization. Plant competition or sex did not affect the intraradical structures, extraradical hyphae, or spore production of the AM fungus.• These findings suggest that plant sexual differences affect fundamental processes such as competitive ability and symbiotic relationships with AM fungi.

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“…For example, AM reduces stress consequences caused by pathogens, heavy metals, and soil salinization (Jentschke, Godbold, 2000;Harrier, Watson, 2004;Whipps, 2004;Smith, Read, 2008). Plants do not receive large benefits from AM when there is high availability of nutrients, but AM enhances plant development under conditions of nutrient deficiency (Höpfner et al, 2015). Depending on the timing of S. canadensis invasion in arid habitats, the relative abundance of the two dominant AMF species significantly varied.…”

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Does arbuscular mycorrhiza favor invasion of some Asteraceae tribes?

2021

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Invasive species, including more than three dozen Asteraceae, such as Solidago canadensis, Leucanthemum vulgare, Senecio inaequidens etc, pose serious threat to ecosystem health. Arbuscular mycorrhizal symbiosis is a key factor for distribution of invasive species of some Asteraceae tribes, including Astereae, Anthemideae, Senecioneae, Gnaphalieae, Cardueae, and Cichorieae. The formation of invasion-friendly plant communities has occurred through increasing nutrient and water availability, hormonal regulation, production of bioactive compounds, and mycorrhiza-induced resistance of host plants. Native species are displaced through the influence on soil microbiota, mycorrhizal and nutrient status of neighboring plants, and several other parameters. Allelopathic influences and symbiotic interactions with bacteria and other fungi can inhibit these processes. Understanding the mycorrhizal status of invasive weeds, in our opinion, is a necessary condition for their successful control.

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

Cited by 16 publications

References 59 publications

Conditions Promoting Mycorrhizal Parasitism Are of Minor Importance for Competitive Interactions in Two Differentially Mycotrophic Species

Conditions Promoting Mycorrhizal Parasitism Are of Minor Importance for Competitive Interactions in Two Differentially Mycotrophic Species

Competitive interactions are mediated in a sex‐specific manner by arbuscular mycorrhiza in Antennaria dioica

Does arbuscular mycorrhiza favor invasion of some Asteraceae tribes?

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