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Salkowski’s Reagent Test as a Primary Screening Index for Functionalities of Rhizobacteria Isolated from Wild Dipterocarp Saplings Growing Naturally on Medium-Strongly Acidic Tropical Peat Soil

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Title: Salkowski’s Reagent Test as a Primary Screening Index for Functionalities of Rhizobacteria Isolated from Wild Dipterocarp Saplings Growing Naturally on Medium-Strongly Acidic Tropical Peat Soil
Authors: RAHMAN, Atiqur Browse this author
SITEPU, Irnayuli R. Browse this author
TANG, Sui-Yan Browse this author
HASHIDOKO, Yasuyuki Browse this author
Keywords: Salkowski’s reagent test
functional rhizobacteria
tropical peat soil
dipterocarp
IAA production
Issue Date: 23-Nov-2010
Publisher: 日本農芸化学会
Journal Title: Bioscience, Biotechnology, and Biochemistry
Volume: 74
Issue: 11
Start Page: 2202
End Page: 2208
Publisher DOI: 10.1271/bbb.100360
PMID: 21071871
Abstract: Rhizobacteria isolated from wild dipterocarp saplings in Central Kalimantan, Indonesia, were subjected to Salkowski’s reagent test, which is often used in detecting indolic substances. Among 69 isolates grown in a low-nitrogen medium supplemented with L-tryptophan (TRP), culture fluids of 29 strains were positive to the test, in which 17 bacteria turned red and other 10 pink. All the red type rhizobacteria actively converted TRP into tryptophol (TOL), while some yielded indole-3-acetic acid (IAA) with TOL production. They also showed a capacity to decompose gallotannin into pyrogallol via gallic acid. On the other hand, an active IAA-producing Serratia sp. CK67, and three Fe-solubilizing Burkholderia spp. CK28, CK43, and Citrobacter sp. CK42, were all involved in pink type rhizobacteria, which were more effective, oxidative TRP-degraders than the red type rhizobacteria. Thus, Salkowski’s reagent test should be a useful primary index in the screening of functional rhizobacteria in peatland ecosystem.
Type: article
URI: http://hdl.handle.net/2115/45489
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 橋床 泰之

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