Search results
Results From The WOW.Com Content Network
These organisms perform photosynthesis through organelles called chloroplasts and are believed to have originated about 2 billion years ago. [1] Comparing the genes of chloroplast and cyanobacteria strongly suggests that chloroplasts evolved as a result of endosymbiosis with cyanobacteria that gradually lost the genes required to be free-living.
Photosynthesis usually refers to oxygenic photosynthesis, a process that produces oxygen. Photosynthetic organisms store the chemical energy so produced within intracellular organic compounds (compounds containing carbon) like sugars, glycogen , cellulose and starches .
Parallel trichomes can then further unite into aggregates called rafts. [1] Cyanobacteria such as Aphanizomenon are known for using photosynthesis to create energy and therefore use sunlight as their energy source. [2] Aphanizomenon bacteria also play a big role in the Nitrogen cycle since they can perform nitrogen fixation.
Cyanobacteria carry out plant-like photosynthesis because the organelle in plants that carries out photosynthesis is derived from an [4] endosymbiotic cyanobacterium. [5] This bacterium can use water as a source of electrons in order to perform CO 2 reduction reactions.
Cyanobacteria have strict light requirements. Too little light can result in insufficient energy production, and in some species may cause the cells to resort to heterotrophic respiration. [22] Too much light can inhibit the cells, decrease photosynthesis efficiency and cause damage by bleaching.
As its growth is completely dependent upon photosynthesis. This results in the 50–100 m water level inside the ocean. Growth can also come from land factors, for example minerals that are dissolved from rocks, mineral nutrients from generations of plants and animals ,that made its way into the photic zone. [25] Drawn image of a phytoplankton
In gastropods, photosymbiosis can be found in several genera. The species Strombus gigas hosts Symbiodinium which is acquired during the larval stage, at which point it is a mutualistic relationship. [44] However, during the adult stage, Symbiodinium becomes parasitic as the shell prevents photosynthesis. [45]
Oscillatoria brevis is a mesophile but can bear a temperature of -16°C, [6] and can perform photosynthesis at a temperature of 70°C. [7] It is a photoautotroph, containing Chlorophyll a and c-phycocyanin, but can perform anoxygenic photosynthesis by reducing sulfur. [8] It is able to fix nitrogen, and can be cultured from soils.