Plants, algae, and a group of bacteria called cyanobacteria are the only organisms capable of performing photosynthesis . In nature they can be found almost everywhere from the open ocean, to deserts and thermal springs. Photosynthetic bacteria in the concrete make it bright green until it dries and turns brown. splits water molecule to release oxygen. Plants and other autotrophs are the producers of the biosphere. Definition: Cyanobacteria represents the major group of photosynthetic bacteria, which can carry out the oxygenic photosynthesis.It releases oxygen and uses water as an electron-donating substrate, i.e. Purple and green bacteria and cyanobacteria are photosynthetic. Other than this, they are also capable of fixing nitrogen. Why identify microscopic photosynthetic bacteria called Cyanobacteria? These were formerly thought to be algae, until scientists found that they had no nuclei, like other bacteria. Close relatives of cyanobacteria were probably the ancestors of the photosynthetic organelles (plastids) in modern plants. Cyanobacteria photosynthesize like all plants do and thus produce the oxygen we breath. All the photosynthetic bacteria contain chromatophores which have β-carotene, xanthophyll (carotenoids), and phycobilisomes (phycocya­nin and phycoerythrin). The photosynthetic reaction center is made up of several protein complexes, and pigments that are combined to exhibit the primary energy conservation reactions during photosynthesis. Photosynthetic microorganisms are united by the need to maximize solar irradiation onto their light trapping centers. Instead of using chlorophyll to capture the sun's light, these bacteria use a compound called bacteriochlorophyll. Photosynthetic bacteria have functionally equivalent pigments called bacteriochlorophylls, and also ancillary pigments involved in light trapping. Cyanobacteria, the small, harmless bacteria, are invisible to the naked eye. Photosynthetic bacteria are able to produce energy from the sun's rays in a process similar to that used by plants. Chloroplasts In green leaves, the cells just below the epidermal layer contain the green organelles called chloroplasts. Gleocapsa Structures Involved in Photosynthesis Photosynthesis occurs in specialized organelles within plants, called chloroplasts. Bacteriochlorophylls: Photosynthetic bacteria appear in different colour suspension. o Within the chloroplasts, there are structures containing special light-sensitive pigments called chlorophyll. The chloroplasts of plants use a process called photosynthesis to capture light energy from the sun and convert it to chemical energy stored in sugars and other organic molecules. The sunlight is transferred to the light-harvesting system found in the chloroplast. Because photosynthetic bacteria commonly grow in competition for sunlight, each type of photosynthetic bacteria is optimized for harvesting the wavelengths of light to which it is commonly exposed, leading to stratification of microbial communities in aquatic and soil ecosystems by … Chapter 10: Photosynthesis Lecture Outline Overview: The Process That Feeds the Biosphere Life on Earth is solar powered. The energy extracted today by the burning of coal and petroleum products represents sunlight energy captured and stored by photosynthesis 350 to 200 million years ago during the Carboniferous Period. ... bricks of the so-called “living concrete” are made by mixing the ingredients in a mold. Most of the carotenes are present in photosystem I while phycobilisomes are present in photosystem II. A team of researchers from Germany, Denmark and the United Kingdom has identified circadian rhythms in non-photosynthetic, Gram-positive bacterium Bacillus subtilis. 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