Search results
Results From The WOW.Com Content Network
Heterocysts or heterocytes are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as Nostoc, Cylindrospermum, and Anabaena. [1] They fix nitrogen from dinitrogen (N 2 ) in the air using the enzyme nitrogenase , in order to provide the cells in the filament with nitrogen for biosynthesis.
Cyanobacterial cell division and cell growth mutant phenotypes in Synechocystis, Synechococcus, and Anabaena.Stars indicate gene essentiality in the respective organism. While one gene can be essential in one cyanobacterial organism/morphotype, it does not necessarily mean it is essential in all other cyanobacteria.
Nostoc commune. Nostoc commune is found in many countries around the world. It is able to survive in extreme conditions in polar regions and arid areas. It is a terrestrial or freshwater species and forms loose clumps on soil, gravel and paved surfaces, among mosses and between cobbles. [1]
A more obvious answer would be that pili help to build the aggregates by binding the cells with each other or with the extracellular polysaccharide. As with other kinds of bacteria, [ 137 ] certain components of the pili may allow cyanobacteria from the same species to recognise each other and make initial contacts, which are then stabilised by ...
This glossary of chemistry terms is a list of terms and definitions relevant to chemistry, including chemical laws, diagrams and formulae, laboratory tools, glassware, and equipment. Chemistry is a physical science concerned with the composition, structure, and properties of matter , as well as the changes it undergoes during chemical reactions ...
A study was conducted to test rock phosphate solubilization by lichen-forming fungi. Bacteria that were attached to biotic or abiotic surfaces stimulate exopolysaccharide synthesis. [ 4 ] While lichens have the ability to absorb nitrogen from rock, this only accounts for a small portion of the nitrogen cycle compared to the conversion of ...
Siderophores usually form a stable, hexadentate, octahedral complex preferentially with Fe 3+ compared to other naturally occurring abundant metal ions, although if there are fewer than six donor atoms water can also coordinate.
Molecular diffusion, often simply called diffusion, is the thermal motion of all (liquid or gas) particles at temperatures above absolute zero. The rate of this movement is a function of temperature, viscosity of the fluid and the size (mass) of the particles.