Bioscience, Biotechnology, and Biochemistry
Online ISSN : 1347-6947
Print ISSN : 0916-8451
Microbiology & Fermentation Technology Notes
Distribution of Pink-Pigmented Facultative Methylotrophs on Leaves of Vegetables
Masayuki MIZUNOHiroya YURIMOTONaoko YOSHIDAHiroyuki IGUCHIYasuyoshi SAKAI
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2012 Volume 76 Issue 3 Pages 578-580

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Abstract

The distribution of pink-pigmented facultative methylotrophs (PPFMs) on the leaves of various vegetables was studied. All kinds of vegetable leaves tested gave pink-pigmented colonies on agar plates containing methanol as sole carbon source. The numbers of PPFMs on the leaves, colony-forming units (CFU)/g of fresh leaves, differed among the plants, although they were planted and grown at the same farm. Commercial green perilla, Perilla frutescens viridis (Makino) Makino, gave the highest counts of PPFMs (2.0–4.1×107 CFU/g) of all the commercial vegetable leaves tested, amounting to 15% of total microbes on the leaves. The PPFMs isolated from seeds of two varieties of perilla, the red and green varieties, exhibited high sequence similarity as to the 16S rRNA gene to two different Methylobacterium species, M. fujisawaense DSM5686T and M. radiotolerans JCM2831T respectively, suggesting that there is specific interaction between perilla and the PPFMs.

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© 2012 by Japan Society for Bioscience, Biotechnology, and Agrochemistry
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