Benefits in plant N uptake via the mycorrhizal pathway in ample soil moisture persist under severe drought

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F23%3A00576933" target="_blank" >RIV/61388971:_____/23:00576933 - isvavai.cz</a>

Alternative codes found

RIV/67985939:_____/23:00576933

Result on the web

<a href="https://doi.org/10.1016/j.soilbio.2023.109220" target="_blank" >https://doi.org/10.1016/j.soilbio.2023.109220</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.soilbio.2023.109220" target="_blank" >10.1016/j.soilbio.2023.109220</a>

Result language

angličtina

Original language name

Benefits in plant N uptake via the mycorrhizal pathway in ample soil moisture persist under severe drought

Original language description

Under global change, drought is a threat of increasing importance to plant growth and nutrition. We employed isotopic labeling on potted tomatoes (Solanum lycopersicum, cv. ‘Micro Tom’) to investigate the role of an arbuscular mycorrhizal fungus (AMF – Rhizophagus irregularis) in plant uptake of nitrogen (N) from either inorganic (15NH4Cl) or organic source (15N-labeled clover biomass) along a soil moisture gradient. 15N was provided into root-excluding mesh bags inserted in pots with mycorrhizal (M) and nonmycorrhizal (NM) plants. After labeling, a substrate moisture gradient ranging from ample moisture to the wilting point was maintained for the terminal 4 weeks.M plants acquired strikingly more 15N derived from either the inorganic or organic source than their NM counterparts. The advantage of M plants in 15N uptake was manifested across the entire moisture range, although a declining trend was observed toward the drought extreme. M plants exploited up to threefold more 15N if it was provided in the inorganic form than in the organic form, probably due to faster availability of ammonium dissolved from 15NH4Cl and adsorbed on soil particles as compared to ammonium ions derived from clover biomass via mineralization. Interestingly, NM plants received more 15N from the organic than from the inorganic source. Mycorrhiza caused a fourfold increase in N acquisition from mineral sources but only by twofold from organic sources. We speculate that this was partly caused by higher rates of N transformation of ammonium ions released by mineralization to more mobile forms (nitrification) that happened inside mesh bags with the clover biomass, and we discuss possible mechanisms responsible for such increased mobility.

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

Soil Biology and Biochemistry

ISSN

0038-0717

e-ISSN

—

Volume of the periodical

187

Issue of the periodical within the volume

December

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

109220

UT code for WoS article

001100868500001

EID of the result in the Scopus database

2-s2.0-85174587017