Using extremophiles to improve plant growth under harsh (OK, deadly) conditions as on Mars might be a first step to making it habitable. (Hey, one can dream...)
http://science.nasa.gov/headlines/y2005/05aug_nostress.htm?list91324 ...On Mars, plants would have to tolerate conditions that usually cause them a great deal of stress -- severe cold, drought, low air pressure, soils that they didn't evolve for. But plant physiologist Wendy Boss and microbiologist Amy Grunden of North Carolina State University believe they can develop plants that can live in these conditions. Their work is supported by the NASA Institute for Advanced Concepts. Stress management is key: Oddly, there are already Earth creatures that thrive in Mars-like conditions. They're not plants, though. They're some of Earth's earliest life forms--ancient microbes that live at the bottom of the ocean, or deep within Arctic ice. Boss and Grunden hope to produce Mars-friendly plants by borrowing genes from these extreme-loving microbes. And the first genes they're taking are those that will strengthen the plants' ability to deal with stress. Ordinary plants already possess a way to detoxify superoxide, but the researchers believe that a microbe known as Pyrococcus furiosus uses one that may work better. P. furiosus lives in a superheated vent at the bottom of the ocean, but periodically it gets spewed out into cold sea water. So, unlike the detoxification pathways in plants, the ones in P. furiosus function over an astonishing 100+ degree Celsius range in temperature. That's a swing that could match what plants experience in a greenhouse on Mars... Debbi who is experimenting with herbs at altitude, having discovered already that tomatoes don't do well __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
