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Plants point the way to coping with climate change

Roses flowering at Christmas and snow-free ski resorts this winter suggest that climate change is already with us and our farmers and growers will need ways of adapting. Scientists studying how plants have naturally evolved to cope with the changing seasons of temperate climates have made a discovery that could help us to breed new varieties of crops, able to thrive in a changing climate.

The importance of the discovery is that it reveals how a species has developed different responses to different climates in a short period of time.

Researchers at the John Innes Centre (JIC), Norwich, UK have been examining how plants use the cold of winter to time their flowering for the relative warmth of spring. This process, called vernalization, varies even within the same plant species, depending on local climate. In Scandinavia, where winter temperatures can vary widely, the model plant, Arabidopsis has a slow vernalization response to prevent plants from being 'fooled' into flowering by a short mid-winter thaw. One particular gene, named FLC, delays flowering over the winter and the research team discovered how cold turns off FLC and what keeps it off during growth in spring. In the UK plants only need four weeks of cold to stably inactivate FLC, allowing plants to start their spring flowering early. Arabidopsis plants in Sweden have a mechanism that requires 14 straight weeks of winter cold before FLC is stably inactivated. This prevents the plants flowering only to be hit with another month of harsh winter weather.

Research leader at JIC, Professor Caroline Dean, explains: "We studied levels of the FLC gene in Arabidopsis plants from different parts of the world expecting to find regional variations that correlated with how much cold was required to switch FLC off. We discovered that FLC levels in autumn and the rate of reduction during the early phases of cold were quite similar in Arabidopsis plants from Edinburgh and N. Scandinavia . Howe
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Contact: Matt Goode
matt.goode@bbsrc.ac.uk
44-179-341-3299
Biotechnology and Biological Sciences Research Council
9-Jan-2007


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