Publication Details

Category Text Publication
Reference Category Journals
DOI 10.3389/fpls.2022.935829
Licence creative commons licence
Title (Primary) Two-phase conceptual framework of phosphatase activity and phosphorus bioavailability
Author Manzoor, A.; Dippold, M.A.; Loeppmann, S.; Blagodatskaya, E.
Journal Frontiers in Plant Science
Year 2022
Department BOOEK
Volume 13
Page From art. 935829
Language englisch
Topic T5 Future Landscapes
Keywords phosphatase-soil interactions; substrate catalysis; root exudation; mucilage; LMWOAs; phosphatase adsorption
Abstract The activity of extracellular phosphatases is a dynamic process controlled by both plant roots and microorganisms, which is responsible for the mineralization of soil phosphorus (P). Plants regulate the availability of soil P through the release of root mucilage and the exudation of low-molecular weight organic acids (LMWOAs). Mucilage increases soil hydraulic conductivity as well as pore connectivity, both of which are associated with increased phosphatase activity. The LMWOAs, in turn, stimulate the mineralization of soil P through their synergistic effects of acidification, chelation, and exchange reactions. This article reviews the catalytic properties of extracellular phosphatases and their interactions with the rhizosphere interfaces. We observed a biphasic effect of root metabolic products on extracellular phosphatases, which notably altered their catalytic mechanism. In accordance with the proposed conceptual framework, soil P is acquired by both plants and microorganisms in a coupled manner that is characterized by the exudation of their metabolic products. Due to inactive or reduced root exudation, plants recycle P through adsorption on the soil matrix, thereby reducing the rhizosphere phosphatase activity. The two-phase conceptual framework might assist in understanding P-acquisition (substrate turnover) and P-restoration (phosphatase adsorption by soil) in various terrestrial ecosystems.
Persistent UFZ Identifier
Manzoor, A., Dippold, M.A., Loeppmann, S., Blagodatskaya, E. (2022):
Two-phase conceptual framework of phosphatase activity and phosphorus bioavailability
Front. Plant Sci. 13 , art. 935829