S-STEM Scholar Annayz Ruiz's Blog

This week I did TGY broth and agar plates for D. Gobiensis. Stacy taught us how to use the thermo hood and how to do a 4 streak way on the plate. We did 3 plates to examine each plate for no contamination.

Upon researching my bacteria, I found more interesting facts. This bacteria is about 1.6 micrometer length and width. For enzyme testing these came out positive for catalase, cytochrome oxidase, and urease. It was also positive for the following tests: aspartic, fructose, glucose, lactose, nitrate, and sucrose. It does not have the ability of spore formation. The culture in medium is Trypticase Soy yeast extract. This is a mesophillic bacteria. The temperature it grows is 28°C and also between 15°C-35°C. The optimum growth is 30°C. The pH optimum is 7.5 and growth is 7-8°C.

I was assigned Deinococcus gobiensis yesterday. A few facts while researching this bacteria that it is gram positive, non-motile, spherical red pigmented and facultative anaerobic bacterium. It has higher tolerance to gamma radiation and UV light compare to the other types. It has large number of horizonatally aquired genes. What I find interesting is that there is another strand of D.gobiensis called D.gobiensis I-0. The was found from the upper sand layers of cold desert of Xinjiang region in China.