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Please write a discussion reply for each discussion (Discussion # 1 and Discussion # 2)
Instructions: Peer Responses 125 Words Each discussion
A. You will respond to another classmate with a substantive comment in minimum 125, maximum 150 words about how their organism is detrimental/harmful to another area of microbiology, after you have read their main discussion.
B. Again, you should provide student original writing, paraphrasing from credible sources, cite your source for this post in text in parentheses, and provide full end ref information in APA 7th Edition format.
Discussion # 1
By Nadya Diaz Velazquez
Thiomargarita, that was derived from the Greek for “sulfur pearl” is a very large bacterium whose size is about 100 times vaster and longer than the average bacterium and shaped like beads. This bacterium was first discovered in 1999.The identified giant Thiomargarita bacteria join Thioploca in a small class of microbes now known to connect the sulfur and nitrogen cycles. This bacteria feeds from sulfide and nitrate and can hold their breath for months until they get what they need to survive. Thiomargarita bacteria can float inactively, accumulating sulfur until they come to be brought into contact with the nitrate they need (American Association for The Advancement Of Science, 1999). Thiomargarita Namibienesis are found in high densities near the waters of the coast of Namibia, Africa at water depth of about 300 feet. Researchers do not know how common or widespread Thiomargarita Namibiensis is. According to Heide Schulz, a microbiologist at the Max Planck Institute for Marine Microbiology in Bremen, Germany (1999) the appearance of Thiomargaritas Namibiensis resembles to pearly spheres that glows and can be seen with a naked eye. Such glow is caused by light reflection into the tiny globules of sulfur below the cell’s surface. Thiomargarita Nambiensis has a benevolent impact in the ecological habitat by removing poisonous gas and detoxifying the coastal waters environment for other life-forms to reproduce, such as fish and other marine creatures. This beneficial bacterium can keep the oceanic life active and healthy, and at the same time with food resources for humans’ consumption of varieties diet. Thiomargarita Nambiensis also keeps the oceanic circle of life withing its course by maintaining clean waters. Even the microscopic creatures are needed for the well-being of our ecosystem. Their complementary assistance as microbes, provides essential care for every living creature in our world.
American Association for The Advancement Of Science.1999
Discussion # 2
By Angelica Hernandez
I chose to dive into Deinococcus Radiodurans which is also known as D. Radiodurans. It was discovered over 50 years ago and when this bacterium was discovered it shocked scientists and intrigued them into wanting to learn how it is capable of staying alive. This bacterium is commonly referred to as the toughest bacterium due to it being able to withstand high amounts of raidation. It is pink-orange in color and “can withstand radiation, ultraviolet light and desiccation” (Melanie Blasius, Ulrich Hübscher & Suzanne Sommer, 2008, P. 1). D. Radiodurans can “survive droughts lack of nutrients and most important, a thousand times more radiation than a person can” (Sarah E. DeWeerdt, 2008, P.1) this is very important because D. Radiodurans have proven to be able to protect its own DNA from harmful procedures. The only way this bacterium is able to survive such high radiations is because the “high doses of radiation shatter the D. Radiodurans genome, but the organism stitches the fragments back together, sometimes in just a few hours” (Sarah E. DeWeerdt, 2008, P.1). No one knows exactly where this microbe originated from but it has been found in many different places. Unlike the normal microbe that is a single copy and where the copies are stacked on top of each other D. Radiodurans has between four to ten copies. A huge benefit that D. Radiodurans does is clean up any nucellar energy waste. It is known to destroy solvents and metals in radioactive environments. After scientists learned that D. Radiodurans can survive in long periods of dehydration they chose to put this bacterium in outer space to see how it would be affected and they learned that it was not damaged but it did have cell stress. There are still more of these test being tested with D. Radiodurans as far as what it can do and cannot do to benefit us.
Thank you for reading!
Melanie Blasius, Ulrich Hübscher & Suzanne Sommer (2008) Deinococcus radiodurans: What Belongs to the Survival Kit?, Critical Reviews in Biochemistry and Molecular Biology, 43:3, 221-238, DOI: 10.1080/10409230802122274
Ott, E., Kawaguchi, Y., Kölbl, D. et al. Molecular repertoire of Deinococcus radiodurans after 1 year of exposure outside the International Space Station within the Tanpopo mission. Microbiome 8, 150 (2020). https://doi.org/10.1186/s40168-020-00927-5
Sarah E. DeWeerdt: The World’s Toughest Bacterium (2002), Genome News Network is an editorially independent online publication of the J. Craig Venter Institute. 2000 – 2004 J. Craig Venter Institute.
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