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Drought accentuates the role of mycorrhiza in phosphorus uptake
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SYSNO ASEP 0547671 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Drought accentuates the role of mycorrhiza in phosphorus uptake Author(s) Püschel, David (BU-J) RID, ORCID
Bitterlich, M. (DE)
Rydlová, Jana (BU-J) RID, ORCID
Jansa, J. (CZ)Article number 108243 Source Title Soil Biology and Biochemistry. - : Elsevier - ISSN 0038-0717
Roč. 157, June 2021 (2021)Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords arbuscular mycorrhizal fungi ; grought stress ; phosphorus uptake Subject RIV EE - Microbiology, Virology OECD category Microbiology R&D Projects GA17-12166S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access with time embargo (01.07.2023) Institutional support BU-J - RVO:67985939 UT WOS 000643701100013 EID SCOPUS 85103793009 DOI 10.1016/j.soilbio.2021.108243 Annotation Arbuscular mycorrhizal fungi (AMF) greatly facilitate uptake of phosphorus (P) by most plant species. Whether or how this changes if water becomes limiting remained little explored. Medicago truncatula plants were grown in previously sterilized cultivation substrate and inoculated or not with AMF isolate Rhizophagus irregularis ‘PH5’ (M or NM, respectively) in two-compartment rhizoboxes. The compartments were separated or not with rootexcluding meshes. A 15-step soil moisture gradient (maintained over 5 weeks) spanned generous water supply through strong water deficiency. Two radioisotopes (33P and 32P) were injected into the plant and distant compartments, respectively, to distinguish cumulative and immediate-term plant P uptake from either of the compartments at each moisture level. M plants were larger than NM plants at high and medium moisture levels and accumulated markedly more P throughout the whole gradient. The immediate-term P uptake did not differ between M and NM plants at high moisture, but at medium and low moistures, M plants acquired significantly more 33P than NM plants, even after accounting for differences in root biomass. Increased immediate-term P uptake by M plants grown under medium and low substrate moistures was probably due to complementary effect of direct hyphal uptake and indirect alterations of substrate hydraulic properties by AMF. This research illustrates that AMF remain functional part of plants even under severe drought stress and thus they should be considered when plant functioning under water deficiency is to be fully understood. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2022 Electronic address https://doi.org/10.1016/j.soilbio.2021.108243
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