Stoichiometry of carbon, nitrogen and phosphorus is closely linked to trophic modes in orchids

BMC Plant Biology

Research

Melissa F. Bocayuva¹  Tomáš Figura²  Julita Minasiewicz³  Marc-André Selosse⁴  Alžběta Novotná⁵  Adrian Zwolicki⁶  Jana Jersáková⁷ 

[1] Department of Microbiology, Viçosa Federal University (UFV), P. H. Rolfs Street, CEP: 36570-900, Viçosa, Minas Gerais, Brazil;Department of Mycorrhizal Symbioses, Institute of Botany, Czech Academy of Sciences, Lesní 322, Průhonice, Czech Republic;Department of Experimental Plant Biology, Faculty of Science, Charles University, Viničná 5, 12844, Prague, Czech Republic;Evolution, Biodiversité (ISYEB), Institut de Systématique, Muséum national d’Histoire naturelle, CNRS, Sorbonne Université, EPHE, 57 rue Cuvier, CP 39, F-75005, Paris, France;Faculty of Biology, Department of Plant Taxonomy and Nature Conservation, University of Gdańsk, ul. Wita Stwosza 59, 80-308, Gdańsk, Poland;Faculty of Biology, Department of Plant Taxonomy and Nature Conservation, University of Gdańsk, ul. Wita Stwosza 59, 80-308, Gdańsk, Poland;Department of Microbiology, Viçosa Federal University (UFV), P. H. Rolfs Street, CEP: 36570-900, Viçosa, Minas Gerais, Brazil;Evolution, Biodiversité (ISYEB), Institut de Systématique, Muséum national d’Histoire naturelle, CNRS, Sorbonne Université, EPHE, 57 rue Cuvier, CP 39, F-75005, Paris, France;Faculty of Biology, Department of Plant Taxonomy and Nature Conservation, University of Gdańsk, ul. Wita Stwosza 59, 80-308, Gdańsk, Poland;Institute of Microbiology ASCR, 1083, 142 20, Vídeňská, Praha, Czech Republic;Faculty of Biology, Department of Vertebrate Ecology and Zoology, University of Gdańsk, ul. Wita Stwosza 59, 80-308, Gdańsk, Poland;Faculty of Science, University of South Bohemia, 1760, 37005, Branišovská, České Budějovice, Czech Republic;

关键词: Stoichiometry;    Orchids;    Trophic modes;    Mycoheterotrophy;    Nitrogen;    Phosphorus;   

DOI  :  10.1186/s12870-023-04436-z

 received in 2023-04-07, accepted in 2023-09-04,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundMycorrhiza is a ubiquitous form of symbiosis based on the mutual, beneficial exchange of resources between roots of autotrophic (AT) plants and heterotrophic soil fungi throughout a complex network of fungal mycelium. Mycoheterotrophic (MH) and mixotrophic (MX) plants can parasitise this system, gaining all or some (respectively) required nutrients without known reciprocity to the fungus. We applied, for the first time, an ecological stoichiometry framework to test whether trophic mode of plants influences their elemental carbon (C), nitrogen (N), and phosphorus (P) composition and may provide clues about their biology and evolution within the framework of mycorrhizal network functioning.ResultsWe analysed C:N:P stoichiometry of 24 temperate orchid species and P concentration of 135 species from 45 plant families sampled throughout temperate and intertropical zones representing the three trophic modes (AT, MX and MH). Welch’s one-way ANOVA and PERMANOVA were used to compare mean nutrient values and their proportions among trophic modes, phylogeny, and climate zones. Nutrient concentration and stoichiometry significantly differentiate trophic modes in orchids. Mean foliar C:N:P stoichiometry showed a gradual increase of N and P concentration and a decrease of C: nutrients ratio along the trophic gradient AT < MX < MH, with surprisingly high P requirements of MH orchids. Although P concentration in orchids showed the trophy-dependent pattern regardless of climatic zone, P concentration was not a universal indicator of trophic modes, as shown by ericaceous MH and MX plants.ConclusionThe results imply that there are different evolutionary pathways of adaptation to mycoheterotrophic nutrient acquisition, and that the high nutrient requirements of MH orchids compared to MH plants from other families may represent a higher cost to the fungal partner and consequently lead to the high fungal specificity observed in MH orchids.

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

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