Arctic willow (Salix polaris) exudation as a driver of microbial activity and soil formation in the high arctic tundra

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F25%3A43899054" target="_blank" >RIV/44555601:13520/25:43899054 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41210/25:101912 RIV/60076658:12310/25:43909799

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s10533-025-01222-x" target="_blank" >https://link.springer.com/article/10.1007/s10533-025-01222-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10533-025-01222-x" target="_blank" >10.1007/s10533-025-01222-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Arctic willow (Salix polaris) exudation as a driver of microbial activity and soil formation in the high arctic tundra

Popis výsledku v původním jazyce

Colonization by pioneer plants, amongwhich the arctic willow (Salix polaris) is one of themost important, accelerates soil development afterdeglaciation. This is achieved through the increasedinput of organic matter from plant biomass and theexudation of low molecular mass organic compounds(LMMOA), predominantly organic acids, which facilitatemineral dissolution and nutrient release. Theseexudates support microbial activity and contribute tothe formation of soil organic matter. While there isquite a lot of data on the exudation and accelerationof microbial activity in the rhizosphere of various plants, similar data concerning arctic plants, includingwillow, are scarce. Furthermore, there is a lackof data on the effect of C, N, P root stoichiometryon nutrient content in exudates and the rhizospheremicrobiome during soil succession after deglaciation.In this study, we analysed various habitats of higharctictundra in Petuniabukta (Billefjorden, Svalbard),representing different stages of vegetation development.Our objectives were (i) to assess soil and rhizospherecarbon and nutrient content and availability,as well as microbial biomass CNP; (ii) to evaluatethe rhizosphere effect on nutrient availability and themicrobiome of arctic willow; and (iii) to measure rootand exudation CNP and quality, primarily LMMOA,in arctic willow from the studied habitats. The exudatesreleased to deionised water were analysed forLMMOA and inorganic anions (ion chromatography) as well as the total content of C and N. The plantsroots were analysed for CNP content. Soil chemicalproperties (e.g. pH, organic C, total and exchangeablecontent of elements, water extractable PO43?)and microbial parameters (microbial biomass andquantity of bacteria and fungi) were assessed in bothrhizosphere and bulk soils, with the rhizosphere effectcalculated accordingly. The most abundant LMMOAspecies in willow exudates were lactate, acetate, formate,malate and citrate, followed by pyruvate, quinateand oxalate, collectively representing approximately2% of the total exuded C. The rhizosphereeffect of willows on nutrient availability and microbialparameters was the most significant at sites withearly soil development and diminished with increasingvegetation cover. A link was observed betweennitrogen and phosphorus exudation and plant rootstoichiometry. These trends underscored the essentialrole of root exudation in overcoming microbial nutrientlimitations during early soil development, particularlyin sites with lower nitrogen availability byreducing the soil C/N ratio.

Název v anglickém jazyce

Arctic willow (Salix polaris) exudation as a driver of microbial activity and soil formation in the high arctic tundra

Popis výsledku anglicky

Colonization by pioneer plants, amongwhich the arctic willow (Salix polaris) is one of themost important, accelerates soil development afterdeglaciation. This is achieved through the increasedinput of organic matter from plant biomass and theexudation of low molecular mass organic compounds(LMMOA), predominantly organic acids, which facilitatemineral dissolution and nutrient release. Theseexudates support microbial activity and contribute tothe formation of soil organic matter. While there isquite a lot of data on the exudation and accelerationof microbial activity in the rhizosphere of various plants, similar data concerning arctic plants, includingwillow, are scarce. Furthermore, there is a lackof data on the effect of C, N, P root stoichiometryon nutrient content in exudates and the rhizospheremicrobiome during soil succession after deglaciation.In this study, we analysed various habitats of higharctictundra in Petuniabukta (Billefjorden, Svalbard),representing different stages of vegetation development.Our objectives were (i) to assess soil and rhizospherecarbon and nutrient content and availability,as well as microbial biomass CNP; (ii) to evaluatethe rhizosphere effect on nutrient availability and themicrobiome of arctic willow; and (iii) to measure rootand exudation CNP and quality, primarily LMMOA,in arctic willow from the studied habitats. The exudatesreleased to deionised water were analysed forLMMOA and inorganic anions (ion chromatography) as well as the total content of C and N. The plantsroots were analysed for CNP content. Soil chemicalproperties (e.g. pH, organic C, total and exchangeablecontent of elements, water extractable PO43?)and microbial parameters (microbial biomass andquantity of bacteria and fungi) were assessed in bothrhizosphere and bulk soils, with the rhizosphere effectcalculated accordingly. The most abundant LMMOAspecies in willow exudates were lactate, acetate, formate,malate and citrate, followed by pyruvate, quinateand oxalate, collectively representing approximately2% of the total exuded C. The rhizosphereeffect of willows on nutrient availability and microbialparameters was the most significant at sites withearly soil development and diminished with increasingvegetation cover. A link was observed betweennitrogen and phosphorus exudation and plant rootstoichiometry. These trends underscored the essentialrole of root exudation in overcoming microbial nutrientlimitations during early soil development, particularlyin sites with lower nitrogen availability byreducing the soil C/N ratio.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/LM2015078" target="_blank" >LM2015078: Česká polární výzkumná infrastruktura</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Biogeochemistry

ISSN

0168-2563

e-ISSN

1573-515X

Svazek periodika

30

Číslo periodika v rámci svazku

168

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

22

Strana od-do

"nestrankovano"

Kód UT WoS článku

001439184400001

EID výsledku v databázi Scopus

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