The Effect of Pseudomonas jessenii RU47 on Phosphomonoesterases Activities and their Gene Abundances in the Rhizosphere of Tomato
Yulduzkhon Abdullaeva, Dinah Nassal, Marie Uksa, Ellen Kandeler
University of Hohenheim, Institute of Soil Science and Land Evaluation, Germany
Phosphorus (P) is a vital macronutrient for plants and microorganisms and their growth and development are often limited by the lack of P availability in the soil. Therefore, the application rate of artificial P fertilisers has been globally increased. However, excess use of P amendments causes severe environmental problems. The aim of the study was to investigate the application potential of biological alternatives such as soil inoculation with plant growth promoting bacteria (PGPB) to increase direct P mineralisation in the soil. Many soil microbes including PGPB are able to mineralise organic P to a plant-available form by excreting enzymes such as phosphomonoesterases (EC 3.1.3). This enzyme group includes acid and alkaline phosphomonoesterases, which are phylogenetically widely distributed among bacteria and encoded by the genes PhoD and PhoN, respectively.
Keywords: Acid and alkaline phosphomonoesterase, enzyme activity, microbial mineralisation, phosphorus, qPCR
Contact Address: Yulduzkhon Abdullaeva, University of Hohenheim, Institute of Soil Science and Land Evaluation, Emil-Wolff-Str. 27, 70599 Stuttgart, Germany, e-mail: yuabdullayevagmail.com