Abstract
The emergentmacrophyte Glyceria maxima was subjected to different photoperiods and grown with ammonium or
nitrate as nitrogen source in presterilized microcosms with spatially separated root and non-root compartments. The
microcosms were inoculated with the denitrifying bacterium Pseudomonas chlororaphis. The effect of the plant
and the photoperiod on growth and denitrification by P. chlororaphis
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