Do monera or bacteria have a sense of taste
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Do monera or bacteria have a sense of taste

[From: ] [author: ] [Date: 12-11-10] [Hit: ]
Sensory responsiveness developed with the need to actively seek a source of food. Chemotaxis was likely the earliest ability to coevolve with chemoperception and is still inherent is how cells interact.Chemotaxis is the detection of a diffusing chemical gradient and then moving relative to the direction of the concentration gradient. We retain this ability in our immune systems phagocytes that respond to chemical signals (chemotaxins) released from invaders. This is also the same method bacteria & amoebas use in hunting for food sources.In muticellular organisms with neural systemscontact chemoreception evolved into what we call taste.......
I'm wondering if monera or bacteria have a sense of taste. This is for a science project.
If you can, would you also list your sites?
Thank you so much!

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Bacteria have the ability to detect chemicals in their environment with their cell surface transmembrane receptors. They use the detection to react by triggering foraging behavior towards the greater concentrations or triggering avoidance and move down the chemical gradient. The reaction is chemotaxis. The detection is chemoperception.

Sensory responsiveness developed with the need to actively seek a source of food. Chemotaxis was likely the earliest ability to coevolve with chemoperception and is still inherent is how cells interact.

Chemotaxis is the detection of a diffusing chemical gradient and then moving relative to the direction of the concentration gradient. We retain this ability in our immune system's phagocytes that respond to chemical signals (chemotaxins) released from invaders. This is also the same method bacteria & amoebas use in hunting for food sources. The sensory systems coevolved as an arms war to forage for prey and to avoid being prey'

In muticellular organisms with neural systems contact chemoreception evolved into what we call taste. Ingestion and detection of certain chemical qualities allows the food to be rejected if too toxic. Taste or contact chemoreception is not the same as remote chemoreception or smell.

Remote chemoreception can analyze a gradient of diffusing molecules, like bacteria can. Bacteria do not ingest food so have no internal receptors to determine quality. This is all done externally before approaching the food. Once on the food bacteria secrete digesting enzymes and acids to hydrolyze the food first then absorb only the nutrients leaving the waste always outside their cell wall.

Chemoperception/Chemotaxis
http://www.caltech.edu/content/caltech-s…
http://chemotaxis.biology.utah.edu/Parki…
http://www.ncbi.nlm.nih.gov/pubmed/17217…
‘Protein Complexes Help Point Migrating Cells in the Right Direction’ for directed mobility
http://www.pubmedcentral.nih.gov/article…
Chemotaxis and Motility in Fifteen Organisms with Fully Sequenced Genomes
http://cmgm.stanford.edu/~hurowitz/chemo…

Many bacteria also have phototaxis, to move relative to a detected light source. The ability to move was integrated, with biochemical steps, to receptors that changed shape when absorbing light so is similar to binding a specific chemical to trigger motion.

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"Sense of taste" is not the best way to say it, but yes, bacteria can detect molecules in their environment and will swim toward some and swim away from others. The proper term for this is "chemotaxis".
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