Abstract
The activity of hydrolases in the rhizosphere soil are involved in the decomposition of organic residues, cycling of nutrients, and in maintaining soil fertility and plant productivity. Rhizosphere microrganisms release extracellular enzymes for the initial degradation of high molecular polymers, that can also result in the suppression of plant pathogenic fungi directly. Root exudates including plant growth promoting regulators have different stimulatory effects on microbial growth and on hydrolase activities in the rhizosphere. Possible causes for lower enzyme production in the rhizosphere of trace element contaminated soils and/or saline soils could be microbial metabolic stress and osmotic potential of the soil due to higher salt concentrations. In spite of increasing knowledge on the microbial community composition, no comparisons with the enzyme activity are normally carried out in order to reveal relationship between microbial diversity and enzyme activity in the rhizosphere.. This kind of comparative work may be of great interest from theoretical and practical aspects.
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Egamberdieva, D., Renella, G., Wirth, S., Islam, R. (2010). Enzyme Activities in the Rhizosphere of Plants. In: Shukla, G., Varma, A. (eds) Soil Enzymology. Soil Biology, vol 22. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-14225-3_8
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