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- Title
Azospirillum spp. metabolize [17,²17-H<sub>2</sub>]gibberellin A<sub>20</sub> to [17,17-²H<sub>20</sub>]gibberellin A<sub>1</sub> in vivo in dy rice mutant seedlings.
- Authors
Cassán, Fabricio D.; Lucangeli, Carlos D.; Bottini, Rubén; Piccoli, Patricia N.
- Abstract
Azospirillum spp. are endophytic bacteria with beneficial effects on cereals — effects partially attributed to gibberellin production by the microorganisms. Azospirillum lipoferum and Azospirillum brasilense inoculated to rice dy mutant reversed dwarfism in seedlings incubated with [17,17-²H2]GA20 with formation of [17,17-²H2]GA1, showing the in vivo capacity to perform the 3β-hydroxylation. When Prohexadione-Ca, an inhibitor of late steps in gibberellin biosynthesis, was added to the culture medium, no complementation was observed and no [17,17-²H2]GA1 was produced. The latter suggests that the bacterial operating enzyme may be a 2-oxoglutarate-dependent dioxygenase, similar to those of plants.
- Subjects
AZOSPIRILLUM; GIBBERELLINS; GENETIC mutation; SEEDLINGS; DWARFISM; PLANTS
- Publication
Plant & Cell Physiology, 2001, Vol 42, Issue 7, p763
- ISSN
0032-0781
- Publication type
Article