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Organic Nitrogen Gives New Clue To Biodiversity
London, UK (SPX) Apr 17, 2006 Scientists have found that organic nitrogen is more important for plant growth than previously thought and could contribute to maintaining diversity in grasslands. Until recently it was generally believed that the most important source of nitrogen for plants was inorganic nitrogen. However, researchers funded by the Biotechnology and Biological Sciences Research Council (BBSRC) from the University of Lancaster and the Institute of Grassland and Environmental Research (IGER) have found that not only can organic nitrogen be directly taken up by plants it is also used differently by different species, enabling nitrogen sharing and biodiversity. By tagging organic nitrogen with stable isotopes researchers have challenged the long held idea that organic nitrogen has to be first converted into an inorganic form before the plants can use it. Their findings have significant implications in unfertilised, low-productivity grasslands where organic nitrogen often appears in greater concentrations than inorganic forms. Professor Richard Bardgett, lead researcher at the University of Lancaster explained: "This research provides important new information about what happens to organic nitrogen in real ecosystems in real time. Tagging amino acids also revealed that different plant species prefer different sources of organic nitrogen. These preferences may be a way for plants and microbes to avoid competition with their neighbours for nitrogen when it is in very short supply, effectively enabling them to share nitrogen and maintain biodiversity." Professor Julia Goodfellow, BBSRC Chief Executive, commented: "This is important work which increases our understanding about the underlying processors that generate and maintain biodiversity and will help farmers, industry and government make the most of natural resources and use biodiversity more effectively." Community Email This Article Comment On This Article Related Links Biotechnology and Biological Sciences Research Council Darwin Today At TerraDaily.com
Historic Plant Type Specimens To Go Digital
Philadelphia PA (SPX) Apr 13, 2006A unique collection of plant specimens that is part of The Academy of Natural Sciences' world-renowned herbarium soon will be viewable through the Internet, thanks to a grant from the National Science Foundation. |
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