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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Plant and Soil

ISSN

0032-079X

e-ISSN

1573-5036

Svazek periodika

491

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

17

Strana od-do

627-643

Kód UT WoS článku

001022746600004

EID výsledku v databázi Scopus

2-s2.0-85163888162