Arbuscular mycorrhizal hyphae selectively suppress soil ammonia oxidizers but probably not by production of biological nitrification inhibitors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F23%3A00578414" target="_blank" >RIV/61388971:_____/23:00578414 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s11104-023-06144-x" target="_blank" >https://link.springer.com/article/10.1007/s11104-023-06144-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11104-023-06144-x" target="_blank" >10.1007/s11104-023-06144-x</a>

Result language

angličtina

Original language name

Arbuscular mycorrhizal hyphae selectively suppress soil ammonia oxidizers but probably not by production of biological nitrification inhibitors

Original language description

AimsArbuscular mycorrhizal (AM) fungi establish root symbioses that can improve acquisition of nutrients such as nitrogen (N) from soils, leading to improvements in host plant growth. Previously, we showed that applying AM fungal necromass to the rhizosphere could stimulate plant growth. Here we investigated the interactions between AM fungi (living or dead) and ammonia oxidizers (AO), a key group of soil prokaryotes involved in soil N cycling, to understand the effects of these interactions on plant N levels. We were interested in whether the necromass contained any significant biological nitrification inhibitory (BNI) activity that could account for the previously suggested antagonism between AM fungi and AO.MethodsWe set up a compartmented pot experiment with Andropogon gerardii as a host plant, which included rhizosphere (amended with living and/or dead AM fungal biomass) and a root-free zone. The latter contained a mesh bag with N-15-labelled plant litter.ResultsInoculation with living AM fungus enhanced plant biomass and nutrient acquisition, including increased transfer of N-15 from the mesh bags to the plants. Additionally, AO bacteria but not archaea were significantly suppressed in the mesh bags. In contrast, AM fungal necromass had minimal effect on plant biomass and nutrient acquisition. Surprisingly, it stimulated the growth of both AO bacteria and archaea in the rhizosphere of non-mycorrhizal plants.ConclusionsBased on the above, we found no support for AM fungi suppressing the AO through an elusive BNI production. Rather, it seems that the main mechanism of AM fungal-AO interaction is substrate competition.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10606 - Microbiology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Plant and Soil

ISSN

0032-079X

e-ISSN

1573-5036

Volume of the periodical

491

Issue of the periodical within the volume

1-2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

627-643

UT code for WoS article

001022746600004

EID of the result in the Scopus database

2-s2.0-85163888162