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Plant growth regulators and amino acids released by Azospirillum sp. in chemically defined media
Author(s) -
Thuler D.S.,
Floh E.I.S.,
Handro W.,
Barbosa H.R.
Publication year - 2003
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1046/j.1472-765x.2003.01373.x
Subject(s) - microbial inoculant , diazotroph , facultative , amino acid , bacteria , chemically defined medium , biology , plant growth , ethylene , biochemistry , chemistry , botany , nitrogen fixation , catalysis , in vitro , genetics
Aims: 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. Methods and Results: The presence of those substances was analysed by HPLC. Azospirillum sp. is capable of releasing PGR and amino acids into the culture medium. Conclusions: The type and quantity of the released substances varied, depending on the presence of combined‐N in the medium. Significance and Impact of the Study: A better knowledge of PGR produced by Azospirillum sp. has been gained.