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Spatial and temporal dynamics of hotspots of enzyme activity in soil as affectd by living and dead roots - A soil zymography analysis

Title data

Spohn, Marie ; Kuzyakov, Yakov:
Spatial and temporal dynamics of hotspots of enzyme activity in soil as affectd by living and dead roots - A soil zymography analysis.
In: Plant and Soil. Vol. 379 (2014) Issue 1-2 . - pp. 67-77.
ISSN 1573-5036
DOI: https://doi.org/10.1007/s11104-014-2041-9

Abstract in another language

AimsHotspots of enzyme activity in soil strongly depend on carbon inputs such as rhizodeposits and root detritus. In this study, we compare the effect of living and dead Lupinus polyphyllus L. roots on the smallscale distribution of cellulase, chitinase and phosphatase activity in soil.MethodsSoil zymography, a novel in situ method, was used to analyze extracellular cellulase, chitinase and phosphatase activity in the presence of i. living L. polyphyllus roots prior to shoot cutting and ii. dead/dying roots 10, 20 and 30 days after shoot cutting.ResultsAfter shoot cutting, cellulase and chitinase activities increased and were highest at the root tips. The areas of high cellulase and phosphatase activity extend up to55 mm away from the root. Moreover, we observed microhotspots of cellulose, chitinase, and phosphatase activityup to 60 mm away from the next living root. The number and activity of microhotspots of chitinase activity was maximal 10 days after shoot cutting.ConclusionsThe study showed that young root detritus stimulates enzyme activities stronger than living roots. Soil zymography allowed identification of microhotspots of enzyme activity up to several cm away from living and dying roots, which most likely were caused by arbuscular mycorrhizal fungi.KeywordsRhizosphere . Microbial hotspots . Soil microbial activity . Detritusphere . Spatial distribution . Extracellular enzymes . Synergistic effects

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER119811
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 07 Aug 2015 06:59
Last Modified: 07 Aug 2015 06:59
URI: https://eref.uni-bayreuth.de/id/eprint/17641