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Variation of foliar silicon concentrations in temperate forbs : effects of soil silicon, phylogeny and habitat

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00005831
URN to cite this document: urn:nbn:de:bvb:703-epub-5831-2

Title data

Klotz, Marius ; Schaller, Jörg ; Kurze, Susanne ; Engelbrecht, Bettina M. J.:
Variation of foliar silicon concentrations in temperate forbs : effects of soil silicon, phylogeny and habitat.
In: Oecologia. Vol. 196 (2021) Issue 4 . - pp. 977-987.
ISSN 1432-1939
DOI der Verlagsversion: https://doi.org/10.1007/s00442-021-04978-9

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Abstract

Silicon (Si) accumulation is known to alleviate various biotic and abiotic stressors in plants with potential ecological consequences. However, for dicotyledonous plants our understanding of Si variation remains limited. We conducted a comparative experimental study to investigate (1) interspecific variation of foliar Si concentrations across 37 dicotyledonous forbs of temperate grasslands, (2) intraspecific variation in foliar Si concentration in response to soil Si availability, the influence of (3) phylogenetic relatedness, and (4) habitat association to moisture. Foliar Si differed markedly (approx. 70-fold) across the investigated forbs, with some species exhibiting Si accumulation similar to grasses. Foliar Si increased with soil Si availability, but the response varied across species: species with higher Si accumulation capacity showed a stronger response, indicating that they did not actively upregulate Si uptake under low soil Si availability. Foliar Si showed a pronounced phylogenetic signal, i.e., closely related species exhibited more similar foliar Si concentrations than distantly related species. Significant differences in foliar Si concentration within closely related species pairs nevertheless support that active Si uptake and associated high Si concentrations has evolved multiple times in forbs. Foliar Si was not higher in species associated with drier habitats, implying that in dicotyledonous forbs of temperate grasslands high foliar Si is not an adaptive trait to withstand drought. Our results demonstrated considerable inter- and intraspecific variation in foliar Si concentration in temperate forbs. This variation should have pervasive, but so far understudied, ecological consequences for community composition and functioning of temperate grasslands under land-use and climate change.

Further data

Item Type: Article in a journal
Keywords: Temperate grassland; Dicotyledonous plant species; Phylogenetic signal; Drought resistance; Phytoliths
DDC Subjects: 500 Science > 570 Life sciences, biology
500 Science > 580 Plants (Botany)
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professor Plant Ecology > Professor Plant Ecology - Univ.-Prof. Dr. Bettina Engelbrecht
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professor Plant Ecology
Research Institutions
Research Institutions > Research Centres
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-5831-2
Date Deposited: 08 Oct 2021 10:08
Last Modified: 08 Oct 2021 10:08
URI: https://epub.uni-bayreuth.de/id/eprint/5831

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