|| Checking for direct PDF access through Ovid
To investigate the ability of Azospirillum sp., a facultative endophitic diazotrophic bacterium, to release plant growth regulators (PGR) such as polyamines, ethylene, indoleacetic acid and amino acids in both combined-N and N-free cultures.The presence of those substances was analysed by HPLC. Azospirillum sp. is capable of releasing PGR and amino acids into the culture medium.The type and quantity of the released substances varied, depending on the presence of combined-N in the medium.A better knowledge of PGR produced by Azospirillum sp. has been gained.