4. HCN production
Among the tested isolates only P. putida PP2SS produced HCN when grown on glycine supplemented KB-medium, indicating its capability to catabolize glycine (Askeland and Morrison, 1993), acommon root exudate available in the rhizosphere as a precursorfor HCN synthesis. This compound is reported as a potential inhibitor of many enzymes involved in major plant metabolic processes.