Aerial picture of the Broadbalk experiment
Scientists at Rothamsted Research in Harpenden (1) and the University of Reading have been able to recover DNA from crop diseases on wheat samples stored as part of a Victorian field experiment (2). Using this DNA, they have discovered how changes in air pollution over the last 160 years have affected fungal diseases on our wheat crops.
The most damaging wheat disease in Europe is leaf blotch, caused by two different fungal species, Phaeosphaeria nodorum and Mycosphaerella graminicola. These species cause the loss of millions of tonnes of grain worldwide each year. Changes in the importance of these two species have been reported in the UK and elsewhere but the reason for this has remained unclear.
Dr Bart Fraaije and his colleagues looked at straw samples archived from the Broadbalk experiment, the world’s oldest, continually-running field experiment, which was set up in 1843 to investigate the effect of fertilisers on crop yields and the soil. They were able to extract fungal DNA from the straw, enabling them to carefully track changes in the populations of the two fungi since Broadbalk’s inception over 160 years ago.
Elspeth Bartlet | alfa
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Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
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Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
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