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Molecules 2012, 17(7), 7980-7988; doi:10.3390/molecules17077980
Communication

Rhizonin A from Burkholderia sp. KCTC11096 and Its Growth Promoting Role in Lettuce Seed Germination

1,†
, 1,2,†
, 3,4
, 3
, 1
, 1
 and 1,*
1 School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Korea 2 Department of Botany, Kohat University of Science and Technology, Kohat 26000, Pakistan 3 Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Nizwa 33, Oman 4 Department of Chemistry, Kohat University of Science and Technology, Kohat 26000, Pakistan These authors contributed equally to this work.
* Author to whom correspondence should be addressed.
Received: 19 May 2012 / Revised: 19 June 2012 / Accepted: 28 June 2012 / Published: 3 July 2012
(This article belongs to the Section Metabolites)
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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.
Keywords: Burkholderia sp. KCTC11096; rhizonin A; growth promotion; lettuce seed Burkholderia sp. KCTC11096; rhizonin A; growth promotion; lettuce seed
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kang, S.-M.; Khan, A.L.; Hussain, J.; Ali, L.; Kamran, M.; Waqas, M.; Lee, I.-J. Rhizonin A from Burkholderia sp. KCTC11096 and Its Growth Promoting Role in Lettuce Seed Germination. Molecules 2012, 17, 7980-7988.

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