Distribution of microbial- and root-derived phosphatase activities in the rhizosphere depending on P availability and C allocation – Coupling soil zymography with 14C imaging

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Long-term fertilisation regimes affect the composition of the alkaline phosphomonoesterase encoding microbial community of a vertisol and its derivative soil fractions (2017, background): “The primary producers of acid phosphomonoesterases are plant roots and soil microbes, whereas alkaline phosphomonoesterases only originate from soil microbes and fauna (Tarafdar and Claassen 1988; Spohn and Kuzyakov 2013a).”
Microbial hotspots and hot moments in soil: Concept & review (2015, background): “The lifetime of detritusphere hotspots at dying roots (screened by zymography of cellulase, chitinase and phosphatase activities) was 10e30 days (Spohn and Kuzyakov, 2014).”
Distribution of phosphatase activity and various bacterial phyla in the rhizosphere of Hordeum vulgare L. depending on P availability (2015, methodology): “…bymicrobial C demand has been described already some time ago in aquatic ecosystems (Hernandez et al., 1996; Hoppe and S€oren, 1999; Hoppe, 2003; Heath, 2005; Steenbergh et al., 2011), but has only recently been discussed with respect to soils (Spohn and Kuzyakov, 2013b; Heuck et al., 2015).”
Quantification of bacterial non-specific acid (phoC) and alkaline (phoD) phosphatase genes in bulk and rhizosphere soil from organically managed soybean fields (2017, background): “Enzyme zymography demonstrated higher acid phosphatase activity near the roots, while alkaline phosphatase was more widely distributed (Spohn and Kuzyakov, 2013).”