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Streptomyces deserti sp. nov., isolated from hyper-arid Atacama Desert soil.
Santhanam, Rakesh,Okoro, Chinyere K,Rong, Xiaoying,Huang, Ying,Bull, Alan T,Andrews, Barbara A,Asenjo, Juan A,Weon, Hang-Yeon,Goodfellow, Michael N.V. Swets en Zeitlinger 2012 Antonie van Leeuwenhoek Vol.101 No.3
<P>The taxonomic position of a Streptomyces strain isolated from a hyper-arid desert soil was established using a polyphasic approach. The organism had chemical and morphological properties typical of the genus Streptomyces and formed a phyletic line at the periphery of the Streptomyces coeruleorubidus subcluster in the 16S rRNA gene tree. DNA:DNA relatedness values between the isolate and its nearest phylogenetic neighbours, Streptomyces lomondensis NRRL 3252(T) and Streptomyces lusitanus NRRL B-12501(T) were 42.5 (±0.48)% and 25.0 (±1.78)%, respectively. The isolate was readily distinguished from these organisms using a combination of morphological and phenotypic properties. On the basis of these results, it is proposed that isolate C63(T) (CGMCC 4.6997(T),??=??KACC 15425(T)) be classified as the type strain of Streptomyces deserti sp. nov.</P>
Santhanam, Rakesh,Okoro, Chinyere K.,Rong, Xiaoying,Huang, Ying,Bull, Alan T.,Weon, Hang-Yeon,Andrews, Barbara A.,Asenjo, Juan A.,Goodfellow, Michael Microbiology Society 2012 International journal of systematic and evolutiona Vol.62 No.11
<P>The taxonomic position of a <I>Streptomyces</I> strain isolated from an extreme hyper-arid soil sample collected from the Atacama Desert was determined using a polyphasic approach. The strain, isolate C60<SUP>T</SUP>, had chemical and morphological features typical of members of the genus <I>Streptomyces</I> and formed a distinct phyletic line in the <I>Streptomyces</I> 16S rRNA gene tree, together with the type strain of <I>Streptomyces radiopugnans</I><I>.</I> The two strains were distinguished readily using a combination of phenotypic properties and by a DNA-DNA relatedness value of 23.17 (±0.95) %. On the basis of these genotypic and phenotypic data, it is proposed that isolate C60<SUP>T</SUP> ( = CGMCC 4.7018<SUP>T</SUP> = KACC 15492<SUP>T</SUP>) be classified in the genus <I>Streptomyces</I> as <I>Streptomyces atacamensis</I> sp. nov.</P>
Terry Lopez,Samuel E. Schriner,Michael Okoro,David Lu,Beatrice T. Chiang,Jocelyn Huey,Mahtab Jafari 한국식품영양과학회 2014 Journal of medicinal food Vol.17 No.12
Green tea is a popular beverage believed to have many health benefits, including a reduction in the risks of heart disease and cancer. Rich in polyphenolic compounds known as catechins, green tea and its components have been shown to increase the lifespan of various animal models, including Drosophila melanogaster. Here, we investigated the genderspecific effects of green tea on the lifespan of fruit flies and observed that green tea extended the lifespan of male flies only. This effect was found to be independent of typical aging interventions, such as dietary restriction, modulation of oxidative energy metabolism, and improved tolerance to environmental stresses. The one exception was that green tea did protect male flies against iron toxicity. Since there is an inverse correlation between lifespan and reproduction, the impact of green tea on male reproductive fitness was also investigated. We found that green tea negatively impacted male fertility as shown by a reduced number of offspring produced and increased mating latency. We further identified that the lifespan extension properties of green tea was only observed in the presence of females which alludes to a reproductive (or mating) dependent mechanism. Our findings suggest that green tea extends the lifespan of male flies by inhibiting reproductive potential, possibly by limiting iron uptake. To our knowledge, our study is the first to report the negative impact of green tea on Drosophila male reproduction. Our results also support previous studies that suggest that green tea might have a negative effect on reproductive fitness in humans.