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Sudová R, Kohout P, Kolaříková Z, Rydlová J, Voříšková J, Suda J, Španiel S, Müller-Schärer H, Mráz P. Sympatric diploid and tetraploid cytotypes of Centaurea stoebe s.l. do not differ in arbuscular mycorrhizal communities and mycorrhizal growth response. Am J Bot 2018; 105:1995-2007. [PMID: 30552673 DOI: 10.1002/ajb2.1206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 08/28/2018] [Indexed: 06/09/2023]
Abstract
PREMISE OF THE STUDY Genome duplication is associated with multiple changes at different levels, including interactions with pollinators and herbivores. Yet little is known whether polyploidy may also shape belowground interactions. METHODS To elucidate potential ploidy-specific interactions with arbuscular mycorrhizal fungi (AMF), we compared mycorrhizal colonization and assembly of AMF communities in roots of diploid and tetraploid Centaurea stoebe s.l. (Asteraceae) co-occurring in a Central European population. In a follow-up greenhouse experiment, we tested inter-cytotype differences in mycorrhizal growth response by combining ploidy, substrate, and inoculation with native AMF in a full-factorial design. KEY RESULTS All sampled plants were highly colonized by AMF, with the Glomeraceae predominating. AMF-community composition revealed by 454-pyrosequencing reflected the spatial distribution of the hosts, but not their ploidy level or soil characteristics. In the greenhouse experiment, the tetraploids produced more shoot biomass than the diploids did when grown in a more fertile substrate, while no inter-cytotype differences were found in a less fertile substrate. AMF inoculation significantly reduced plant growth and improved P uptake, but its effects did not differ between the cytotypes. CONCLUSIONS The results do not support our hypotheses that the cytotype structure in a mixed-ploidy population of C. stoebe is mirrored in AMF-community composition and that ploidy-specific fungal communities contribute to cytotype co-existence. Causes and implications of the observed negative growth response to AMF are discussed.
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Affiliation(s)
- Radka Sudová
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
| | - Petr Kohout
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
- Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, CZ-142 20, Prague, Czech Republic
- Department of Experimental Plant Biology, Faculty of Science, Charles University, CZ-128 44, Prague, Czech Republic
| | - Zuzana Kolaříková
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
| | - Jana Rydlová
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
| | - Jana Voříšková
- Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, CZ-142 20, Prague, Czech Republic
- Ecology Department, Climate and Ecosystem Sciences, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Jan Suda
- Institute of Botany, The Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague, Czech Republic
| | - Stanislav Španiel
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague, Czech Republic
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 23, Bratislava, Slovakia
| | - Heinz Müller-Schärer
- Department of Biology, Ecology and Evolution, University of Fribourg, Chemin du Musée 10, CH-1700, Fribourg, Switzerland
| | - Patrik Mráz
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague, Czech Republic
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