Bacterial Communities Associated with Poa annua Roots in Central European (Poland) and Antarctic Settings (King George Island)

Znój, Anna; Grzesiak, Jakub; Gawor, Jan; Gromadka, Robert; Chwedorzewska, Katarzyna J.

doi:10.3390/microorganisms9040811

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Bacterial Communities Associated with Poa annua Roots in Central European (Poland) and Antarctic Settings (King George Island)

^1,2,†

^1,*,†,

and

Katarzyna J. Chwedorzewska

⁴

Department of Antarctic Biology, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5A, 02-106 Warsaw, Poland

Botanical Garden-Center for Biological Diversity Conservation, Polish Academy of Sciences, Prawdziwka 2, 02-973 Warsaw, Poland

Environmental Laboratory of DNA Sequencing and Synthesis, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5A, 02-106 Warsaw, Poland

⁴

Department of Agronomy, Warsaw University of Life Sciences-SGGW, Nowoursynowska 166, 02-787 Warsaw, Poland

Author to whom correspondence should be addressed.

^†

These authors equally contributed to this work.

Academic Editor: C.P.D. (Corina) Brussaard

Microorganisms 2021, 9(4), 811; https://doi.org/10.3390/microorganisms9040811

Received: 12 March 2021 / Revised: 8 April 2021 / Accepted: 9 April 2021 / Published: 12 April 2021

(This article belongs to the Special Issue Polar Microbes)

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Abstract

Poa annua (annual bluegrass) is one of the most ubiquitous grass species in the world. In isolated regions of maritime Antarctica, it has become an invasive organism threatening native tundra communities. In this study, we have explored and compared the rhizosphere and root-endosphere dwelling microbial community of P. annua specimens of maritime Antarctic and Central European origin in terms of bacterial phylogenetic diversity and microbial metabolic activity with a geochemical soil background. Our results show that the rhizospheric bacterial community was unique for each sampling site, yet the endosphere communities were similar to each other. However, key plant-associated bacterial taxa such as the Rhizobiaceae family were poorly represented in Antarctic samples, probably due to high salinity and heavy metal concentrations in the soil. Metabolic activity in the Antarctic material was considerably lower than in Central European samples. Antarctic root endosphere showed unusually high numbers of certain opportunistic bacterial groups, which proliferated due to low competition conditions. Thirteen bacterial families were recognized in this study to form a core microbiome of the P. annua root endosphere. The most numerous were the Flavobacteriaceae, suspected to be major contributors to the ecological success of annual bluegrass, especially in harsh, Antarctic conditions. View Full-Text

Keywords: rhizosphere; microbiome; endosphere; roots; invasive species

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Znój, A.; Grzesiak, J.; Gawor, J.; Gromadka, R.; Chwedorzewska, K.J. Bacterial Communities Associated with Poa annua Roots in Central European (Poland) and Antarctic Settings (King George Island). Microorganisms 2021, 9, 811. https://doi.org/10.3390/microorganisms9040811

AMA Style

Znój A, Grzesiak J, Gawor J, Gromadka R, Chwedorzewska KJ. Bacterial Communities Associated with Poa annua Roots in Central European (Poland) and Antarctic Settings (King George Island). Microorganisms. 2021; 9(4):811. https://doi.org/10.3390/microorganisms9040811

Chicago/Turabian Style

Znój, Anna, Jakub Grzesiak, Jan Gawor, Robert Gromadka, and Katarzyna J. Chwedorzewska. 2021. "Bacterial Communities Associated with Poa annua Roots in Central European (Poland) and Antarctic Settings (King George Island)" Microorganisms 9, no. 4: 811. https://doi.org/10.3390/microorganisms9040811

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Bacterial Communities Associated with Poa annua Roots in Central European (Poland) and Antarctic Settings (King George Island)

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