Abstract—This study aimed to investigate geosmin and 2-methylisoborneol (MIB)-producing cyanobacteria and actinomycetes as sources of earthy-musty odours in Phayao Lake, northern Thailand. Known earthy–musty odour producers, Lyngbya sp., Phormidium sp., Anabaena sp. and Oscillatoria sp., were found as the dominant genera of cyanobacteria in the lake water. Odour-producing Streptomyces spp. were also found to be significantly present in the lake sediment where majority of Streptomyces spp. (63%) isolated were geosmin-producers. The significant density of actinomycetes, particularly Streptomyces, suggests that they played as important contributor to the production of geosmin and MIB in the lake.

Index Terms—Geosmin, MIB, phayao lake, musty odour producers.

Niwooti Whangchai, Tipsukon Pimpimon, and Udomlak Sompong are with Faculty of Fisheries Technology and Aquatic Resources, Maejo University, Sansai, Chiang Mai, 50210, Thailand (email: niwooti@hotmail.co.th).
Supannee Suwanpakdee is with Department of Fisheries, Faculty of Natural Resources, Rajamangala University of Technology Isan, Sakon Nakhon Campus, Sakon Nakhon , 47160 Thailand.
Redel Gutierrez is with College of Arts and Sciences, Central Luzon State University, Science City of Munoz, Nueva Ecija, 3120, Philippines.
Tomoaki Itayama is with Graduate School of Engineering, Nagasaki University, 1-14, Bunkyoumachi, Nagasaki, 852-8521, Japan.

Cite: Niwooti Whangchai, Tipsukon Pimpimon, Udomlak Sompong, Supannee Suwanpakdee, Redel Gutierrez, Tomoaki Itayama, "Study of Geosmin and 2-Methylisoborneol (MIB) Producers in Phayao Lake, Thailand," International Journal of Bioscience, Biochemistry and Bioinformatics vol. 7, no. 3, pp. 177-184, 2017.