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Secrets of potato blight evolution could help farmers fight back
Date:1/30/2014

in host specialisation,' said Dr van der Hoorn. 'We looked at specialisation in the blight pathogens' secret weapon, a key family of effectors called 'EPIC' that can pass through plants' defences undetected to disable the proteases. The EPIC effectors secreted by P. infestans have evolved to fit the structure of potato proteases just as P. mirabilis has evolved effectors that fit four o'clock proteases.

'If we could breed plants with proteases that can detect these stealthy EPIC effectors, we could prevent them from 'sneaking in' and thus make more resistant plants. Within the next decade, we plan to exploit the specialized nature of these effectors to develop proteases that are resistant to their action or can even trap them and destroy the pathogen. Potato and tomato plants with such proteases would be resistant to the blight pathogens, and combined with other resistant traits could provide another 'wall' of defence against the pathogens.'


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