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dc.contributor.author | Bore E. | |
dc.contributor.author | Kuzyakov Y. | |
dc.contributor.author | Dippold M. | |
dc.date.accessioned | 2020-01-21T20:33:32Z | |
dc.date.available | 2020-01-21T20:33:32Z | |
dc.date.issued | 2019 | |
dc.identifier.issn | 0038-0717 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/157432 | |
dc.description.abstract | © 2018 Transformation of sugars by microorganisms is a key process influencing carbon (C) stabilization in soil. To reveal the mechanisms responsible for the persistence of labile C in soil, the fates of position-specific and uniformly 13 C labeled glucose and ribose were studied under field conditions for 800 days. We hypothesized a convergence of the fate of individual C positions and substances because of the long-term C recycling by microorganisms. Position-specific data revealed that both sugars were simultaneously metabolized via glycolysis and the pentose phosphate pathway (PPP). The position-specific 13 C recovery pattern in soil and in microbial biomass was similar. This similarity demonstrated significant contribution of microbial products and necromass to soil organic matter (SOM) formation. Based on a biexponential model, the mean residence times (MRTs) of glucose C-6 and ribose C-5 in the soil were longer than the other C positions. However, the MRT of uniformly labeled 13 C from ribose in the soil was 3 times longer than that from glucose. Consequently, ribose and glucose were incorporated into different cellular components, defining their long-term fate in soil. The convergence of glucose C positions in soil and microbial biomass revealed that recycling and modification of recycled components dominated glucose transformation. In contrast, divergence of ribose C positions in soil revealed that intact ribose-derived cell components are reused or preserved in SOM. Thus, convergence versus divergence of individual C positions distinguished the two key stabilization mechanisms explaining the long persistence of C from easily available sources in the soil: sustained microbial recycling (convergence) versus preservation (divergence) in long-term stabilized compound classes. | |
dc.relation.ispartofseries | Soil Biology and Biochemistry | |
dc.subject | Labile C | |
dc.subject | Metabolic tracing | |
dc.subject | Microorganisms | |
dc.subject | Necromass | |
dc.subject | Preservation | |
dc.subject | Recycling | |
dc.title | Glucose and ribose stabilization in soil: Convergence and divergence of carbon pathways assessed by position-specific labeling | |
dc.type | Article | |
dc.relation.ispartofseries-volume | 131 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 54 | |
dc.source.id | SCOPUS00380717-2019-131-SID85059550436 |