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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

Titelangaben

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. Bd. 379 (2014) Heft 1-2 . - S. 67-77.
ISSN 1573-5036
DOI: https://doi.org/10.1007/s11104-014-2041-9

Abstract

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

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER119811
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 07 Aug 2015 06:59
Letzte Änderung: 07 Aug 2015 06:59
URI: https://eref.uni-bayreuth.de/id/eprint/17641