It has hitherto not been known that higher organisms, such as green algae, can communicate with bacteria. But Debra Milton, associate professor at Umeå University in Sweden, shows in the recent issue of the prominent journal Science that bacteria attract green algae with the aid of signal molecules. Surfaces under water are rapidly colonized by bacteria, which cover the surface with a thin film known as biofilm. Within this biofilm bacteria coordinate activities among the cells with the help of chemical signal molecules, such as N-acyl homoserine lactones (AHL). It is well known that bacteria produce and make use of AHL-signal molecules. On the other hand, it has not been known that organisms, such as algae, also have the capacity to make use of these signal molecules.
Enteromorpha is a common green alga that binds to and thereby damages human constructions like oil rigs, pipes, vessels, etc. This has led to many unwanted problems, such as increased friction for ships, which in turn leads to increased fuel costs, deposition of minerals, and degradation of materials, all entailing major economic consequences.
Green algae are spread in water by producing mobile microscopic zoospores that seek out suitable surfaces on which to adhere. Once these spores have found a suitable place, they excrete an adhesive molecule that permanently fastens the zoospore to the surface, and a new alga can develop and grow. Researchers have previously shown that zoospores adhere to bacteria cells and that biofilm increases the number of zoospores that latch on to such surfaces.
Karin Wikman | alfa
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23.05.2018 | Institute of Industrial Science, The University of Tokyo
Research reveals how order first appears in liquid crystals
23.05.2018 | Brown University
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
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At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
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There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
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The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
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23.05.2018 | Life Sciences