Assessing plant-microbial competition for P-33 using uptake into phospholipids
Rousk, Johannes; Bååth, Erland; Göransson, Hans; Fransson, Ann-Mari (2007). Assessing plant-microbial competition for P-33 using uptake into phospholipids. Applied Soil Ecology, 36, (2-3), 233 - 237
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Published
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English
Authors:
Rousk, Johannes
;
Bååth, Erland
;
Göransson, Hans
;
Fransson, Ann-Mari
Department:
MEMEG
Department of Biology
Functional zoology
Microbial Ecology
Project:
Effect of environmental factors on fungal and bacterial growth in soil
Carbon drivers and microbial agents of soil respiration
Microbial carbon-use efficiency
Research Group:
Microbial Ecology
Abstract:
A novel method of estimating soil microbial P uptake, using P-33 incorporation into the phospholipids in soil microbial biomass, was used in a study of P-competition between plants and microorganisms. The microbial biomass, and thus the competition for the added P-33, was altered by using different glucose treatments in a microcosm set-up. There was obvious competition for P-33, as shown by the negative relationship between P-33 uptake by the plant and P-33 incorporation into microbial phospholipids. The data thus indicate that soil microorganisms partly control P-33 uptake by the plant. The suggested method of measuring P-33 in phospholipids appears to have the potential to provide a rapid alternative to techniques such as chloroform fumigation-extraction for the determination of microbial P uptake, although at present the method will only give relative estimates of P uptake.
Keywords:
FUMIGATION ;
RAPID METHOD ;
EXTRACTION METHOD ;
BIOMASS-P ;
SOIL ;
NITROGEN ;
PHOSPHORUS ;
MICROORGANISMS ;
GLUCOSE ;
COMMUNITIES
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