title: Rhizonin A from Burkholderia sp. KCTC11096 and its growth promoting role in lettuce seed germination.
abstract: We isolated and identified a gibberellin-producing Burkholderia sp. KCTC 11096 from agricultural field soils. The culture filtrate of plant growth promoting rhizobacteria (PGPR) significantly increased the germination and growth of lettuce and Chinese cabbage seeds. The ethyl acetate extract of the PGPR culture showed significantly higher rate of lettuce seed germination and growth as compared to the distilled water treated control. The ethyl acetate fraction of the Burkholderia sp. was subjected to bioassay-guided isolation and we obtained for the first time from a Burkholderia sp. the plant growth promoting compound rhizonin A (1), which was characterized through NMR and MS techniques. Application of various concentrations of 1 significantly promoted the lettuce seed germination as compared to control.
authors: School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Korea. kmoya@hanmail.net
authors: Sang-Mo
authors: SM
authors: Kang
authors: Abdul Latif
authors: AL
authors: Khan
authors: Javid
authors: J
authors: Hussain
authors: Liaqat
authors: L
authors: Ali
authors: Muhammad
authors: M
authors: Kamran
authors: Muhammad
authors: M
authors: Waqas
authors: In-Jung
authors: IJ
authors: Lee
mesh_terms: D001937:Brassica / Q000187:drug effects / Q000254:growth & development; D019117:Burkholderia / Q000737:chemistry*; D005374:Filtration; D018525:Germination / Q000187:drug effects*; D018546:Hypocotyl / Q000187:drug effects / Q000254:growth & development; D018545:Lactuca / Q000187:drug effects* / Q000254:growth & development*; D010456:Peptides, Cyclic / Q000737:chemistry / Q000494:pharmacology*; D010936:Plant Extracts / Q000494:pharmacology; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D012639:Seeds / Q000187:drug effects* / Q000254:growth & development*
chemical_list: D010456:Peptides, Cyclic; D010936:Plant Extracts; C040695:rhizonin A