Universität zu Köln

Huenninghaus, Maike, Dibbern, Doerte, Kramer, Susanne, Koller, Robert ORCID: 0000-0001-7251-7242, Pausch, Johanna, Schloter-Hai, Brigitte, Urich, Tim ORCID: 0000-0002-5718-1354, Kandeler, Ellen ORCID: 0000-0002-2854-0012, Bonkowski, Michael ORCID: 0000-0003-2656-1183 and Lueders, Tillmann ORCID: 0000-0002-9361-5009 (2019). Disentangling carbon flow across microbial kingdoms in the rhizosphere of maize. Soil Biol. Biochem., 134. S. 122 - 131. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0038-0717

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Abstract

Numerous (CO2)-C-13, labeling studies have traced the flow of carbon from fresh plant exudates into rhizosphere bacterial communities. However, the succession of the uptake of carbon leaving the roots by distinct rhizosphere microbiota has rarely been resolved between microbial kingdoms. This can provide valuable insights on the niche partitioning of primary rhizodeposit consumption, as well as on community interactions in plant-derived carbon flows in soil. Here, we have traced the flow of fresh plant assimilates to rhizosphere microbiota of maize (Zea mays L.) by rRNA-stable isotope probing (SIP). Carbon flows involving bacteria, unicellular fungi, as well as protists were observed over 5 and 8 days. Surprisingly, labeling of Paraglomerales and several bacteria including Opitutus, Mucliaginibacter and Massilia spp. was especially apparent in soil surrounding the strict rhizosphere after 5 d. This highlights the central role of arbuscular mycorrhizal fungi (AMF) as a shunt for fresh plant assimilates to soil microbes not directly influenced by root exudation. Distinct trophic webs involving different flagellates, amoeba and ciliates were also observed in rhizosphere and surrounding soil, while labeling of filamentous saprotrophic Ascomycota or Basidiomycota was not apparent. This challenges the proposed sapro-rhizosphere concept and demonstrates the utility of rRNA-SIP to disentangle inter-kingdom microbial relationships in the rhizosphere.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Huenninghaus, Maike UNSPECIFIED UNSPECIFIED UNSPECIFIED Dibbern, Doerte UNSPECIFIED UNSPECIFIED UNSPECIFIED Kramer, Susanne UNSPECIFIED UNSPECIFIED UNSPECIFIED Koller, Robert UNSPECIFIED orcid.org/0000-0001-7251-7242 UNSPECIFIED Pausch, Johanna UNSPECIFIED UNSPECIFIED UNSPECIFIED Schloter-Hai, Brigitte UNSPECIFIED UNSPECIFIED UNSPECIFIED Urich, Tim UNSPECIFIED orcid.org/0000-0002-5718-1354 UNSPECIFIED Kandeler, Ellen UNSPECIFIED orcid.org/0000-0002-2854-0012 UNSPECIFIED Bonkowski, Michael UNSPECIFIED orcid.org/0000-0003-2656-1183 UNSPECIFIED Lueders, Tillmann UNSPECIFIED orcid.org/0000-0002-9361-5009 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-137262
DOI:	10.1016/j.soilbio.2019.03.007
Journal or Publication Title:	Soil Biol. Biochem.
Volume:	134
Page Range:	S. 122 - 131
Date:	2019
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	0038-0717
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PLANT-DERIVED CARBON; ARBUSCULAR MYCORRHIZA; SP. NOV.; SOIL; COMMUNITY; BACTERIAL; ROOTS; FUNGI; FOOD; DIVERSITY Multiple languages Soil Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13726