[meteorite-list] New Zealand Scientist Grow Vegetables In Martian Soil
From: Ron Baalke <baalke_at_meteoritecentral.com>
Date: Thu Apr 22 09:37:36 2004 Message-ID: <200012201709.JAA19075_at_zagami.jpl.nasa.gov> http://www.theage.com.au/breaking/0012/20/A8765-2000Dec20.shtml Kiwi scientists grow vegetables in Martian soil The Age (Australia) Source: NZPA WELLINGTON, Dec 20: American scientists may not be able to take rocks from Mars until at least 2008, but New Zealand researchers have already produced the first vegetable plants grown in Martian soil. Lincoln University scientists have grown potato and asparagus plants in extracts from the Martian meteorite Dar al Gani, found in the Sahara Desert in 1998. They also tried composite soils manufactured to the same chemical mix as Mars dirt. The best results came from carbonaceous chondrite meteorites, such as the Murchison Meteorite which fell in Australia in 1969. Carbonaceous chondrite is a rare class of ancient meteorite that includes wateraltered minerals and organic compounds that contain carbon. >From tissue cultures, the plants were grown to several millimetres, with size and color varying with the soil source. Soil fertility indicators showed the Murchison Meteorite material was comparable to Earth's soil. All the meteorites showed nutrient effects and the Mars meteorite and composites provided minerals, especially phosphate. The work was done by research professor of chemistry Michael Mautner and plant physiologist Professor Tony Conner, both of the Lincoln University soil, plant and ecological sciences division, and David Deamer, a biophysicist at the University of California, United States. The research, supported by the Marsden Fund, the New Zealand government grants for "cutting edge" research, was last year allocated $328,000 to look into the makeup of Martian soils. The scientists tested the biology and fertility of extraterrestrial soils in relation to the origins of life, and as future space exploration resources. "If we build colonies in space, we will have to grow plants for food, so obviously we need to know the soil can support that," Dr Mautner said. "The future is out there in space, so it's exciting. Spacebased soils could potentially support future human expansion in the solar system. I wouldn't say very soon, but in a few centuries." Scientists might eventually be able to plant some forms of life throughout the galaxy, seeding distant planets to test if they could support life. The Lincoln University experiments have shown that materials from interplanetary dust, meteorites and comets could have helped trigger life on Earth. Materials extracted from the Murchison meteorite were found to form sacs similar to cell membranes. Such membranes, and rich solutions in meteorite pores, could have assisted the formation of the first microbes. The scientists have theorised that once present, the meteorite solutions could then have provided the first microorganisms with nutrients until they adapted to the host planet. Similar materials may support the growth of microorganisms in asteroids and comets, if transported there by natural processes or by directed panspermia. Panspermia is a scientific theory that life has been seeded through the universe, partly based on the capacity for comets made of waterice, to carry organic compounds, and even whole cells such as bacterial life across galaxies and protect it from radiation damage along the way. Received on Wed 20 Dec 2000 12:09:19 PM PST |
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