Institute of Biology, College of Science University of the Philippines Diliman, Quezon City 1101 Philippines “Effect of NOD gene integration on the nitrogen fixation activity of Klebsiella spp.“ Maevel M. Romero MS Microbiology Proponent Submitted to: Gil M. Penuliar Ph.D. Abstract Nitrogen is one of the two elements that can easily limit the biologically mediated carbon assimilation of photoautotrophs. This makes nitrogen fixation important and needing a continuous supply of fixed nitrogen available. Conversion of atmospheric nitrogen to its usable form is mediated by prokaryotes, such as bacteria and archaea, collectively called as associative nitrogen fixers or diazotrophs. Nodule formation are exhibited by symbiotic nitrogen fixers which is not present to free-living diazotrophs. A study showed that but preformed nodules made this free –living bacteria more colonizing leading to an increased plant yield. A demand for an alternative nitrogen source aside from commercially available nitrogen fertilizers are in need. There are current issues caused by these fertilizers pressing environmental stress. Altogether, the main objectives of this study includes isolation, purification of Klebsiella isolates from soil samples (corn field) and root nodules (alfalfa), with its proper …show more content…
K. pneumoniae and K. oxytoca are two of the established nitrogen fixer under this genus converting nitrogen to a form usable by plants (Ladha, Barraquio, & Watanabe, 1983). Attachment of this bacteria on the root hairs are found to be strong in comparison with surfaces on the zone of elongation and root cap mucilage where colonization is not likely to occur. Due to non-motile phenotype, high concentration of this organism shows that presence of flagella may induce plant defenses giving no-motility an advantage (Seo & Matthews,
The Neovison vison dissection lab was intended so students could study the external and internal anatomy and physiology of the Neovison vison. Once the Neovison vison was dissected, students could see the similar and different characteristics of the Neovison vison that are present within the human body. Students were able to identify muscles, bones, organs, tissues, insertion points, and origin points within the body of the animal. Reflection on skeletal and muscular structure was also studied throughout the dissection lab. Although the muscles within the Neovison vison and the skeletal structure of the Neovison vison are highly similar to those in a human body, this dissection lab made it known that there truly are anatomical differences within
The purpose of this lab report is to employ a myriad of skills, tools and, methods learned throughout this semester to perform the appropriate tests for the identification of the assigned unknown bacteria. Add more background information here!!! The most important tools and techniques used during this identification include aseptic technique, microscopic examination and, the use of selective and differential media. Aseptic technique is an important tool for microbiologists. It is imperative that aseptic technique is maintained throughout the length of any test to avoid any cross-contamination that may lead to inaccurate results.
Introduction A mutation is a heritable change that is passed from the mother cell to progeny cells. Mutations may lead to good, bad or neutral phenotypic changes in the organism. They may occur spontaneously as in random DNA replicative errors or may be induced by mutagenic chemicals or radiation. Besides mutations, another way that bacteria achieve gene diversity is through the three known mechanisms for intercellular gene transfer.
Another hypothesis made was that the bacteria would glow with the addition of the sugar arabinose. All three of the objectives seem to go hand in hand. The lab began by inserting transformation
The unknown bacteria was then tested on multiple selective and differential media. Growth was present on the MacConkey Agar and the colonies were the same color as the plate, which told me my bacteria was gram negative and did not ferment lactose. There was no growth on the Mannitol Salt Agar, and this told me the unknown was not salt tolerant and did not
Kudzu impacts the local flora with intense negative results. The vine has the ability to enclose stems and tree trunks, break branches and even uproot trees and shrubs through the mass vegetation that is being produced. This “invader” of ecosystems is able to spread by both vertical and horizontal means which smothers all the other plants in a thick covering of stems and leaves. This process blocks the light from reaching the plants, causing them to be unable to undergo photosynthesis. There is a very small percentage of plants that can be subjected to such low light conditions.
Since nitrogen is important component in the plant growth, the agriculture community will produce low yields in their crops. Name three carbon fixation pathways Three carbon fixation pathways are: the reductive citric acid cycle, the hydroxypropionate cycle, and the acetyl-CoA pathway. Are all phototrophs autotrophs?
Pathophysiology: Increased bone resorption or decreased bone, aging because of decreasing supply of osteoblasts, estrogen deficiency, Calcium deficiency, Vitamin D deficiency, Bone fractures, Etiology: Low peak bone mass, being a women, smaller body frame size, lowered sex hormones, excess thyroid, low calcium intake, eating disorders, sedentary lifestyle, excessive alcohol consumption, tobacco use. Manifestations: Back pain, loss of height, stooped posture, bone fractures occur easily. Possible complications: Bone fractures in spine or hip. Treatments: Walking, & Medication Pathophysiology: Vitamin D deficiency, hypocalcaemia, renal phosphorus loss, decreased calcium in bone, calcification of osteoid.
Home Remedies for Nasal Polyps What Are Nasal Polyps? Nasal polyps are growth on the inside of your nose and where your sinuses open into your nasal cavity. They range in size and affect people differently. Nasal polyps are reoccurring, even after being treated successfully with medication.
In addition, the bacteria need arabinose that help activate the protein that allows to glow green in the transformed bacteria cells. To let
Karen is a 17 year old athlete who has been suffering from chronic fatigue, and sore throat. I believe based on Karen’s fatigue and sore throat that she has mononucleosis. Karen has been in high contact situations due to participating in games and going out with her boyfriend; due to this hectic lifestyle her immune system may have been more susceptible to viruses. Upon going to the hospital Karen’s doctor confirmed my suspicions as the physician found that she tonsillitis, swollen lymph nodes, enlarged spleen.
Introduction: In this task I will be researching the effect that acid rain has on the rate of plant growth. Acid rain is any type of precipitation with a high pH, with high levels of nitric acids. The reason why I had chosen this topic was because acid rain seems to have a great effect on the effect of plant growth, and plants play a very important role in our ecosystem. Acid rain is a major problem in our environment when we are not able to neutralize the acidity.
They can also act as a final electron acceptor. Many bacteria can be differentiated and are identified by their capacity to reduce nitrates to nitrites. Most of the bacteria belonging to the family Enterobacteriaceae reduce nitrates [165]. OF test is used to differentiate those organisms that utilize carbohydrates aerobically (Oxidation) such as P. aeruginosa, from those that utilize carbohydrates anaerobically (Fermentation) such as members of the Enterobacteriaaceae. The OF medium contains peptone, test carbohydrate and bromothymol blue as indicator.
Introduction Plants are a major necessity in the balance of nature, people’s lives, and our terrain. We may not realize it, but plants are the ultimate source of food for almost 95% of the world population so says the National Group of Food. It’s a fact that over 7,000 species of plants are being consumed today. Plants are one of the reasons that we get clean water; as they help regulate the water cycle.
The media used in this experiment was Trypticase nitrate broth. The reagents used (A and B) were sulfanilic acid and alpha-naphthylamine (respectively). Using aseptic technique, the bacterium (16A and 16B) were inoculated into labeled broth test tubes. The tubes were incubated for 48 hours at 37 degrees Celsius. When the incubation was complete 5 drops of reagent A and 5 drops of reagent B were added to each of the broths.