Plant materials
Cherry tomatoes (S. lycopersicum L. cv zhenzhu1.) at the mature-green stage, were harvested in June 2011 from plants grown in a greenhouse in Yangdu Experimental Base of Zhejiang Academy of Agricultural Science, Haining, Zhejiang, China. Tomatoes of uniform shape and size and free from fungal infection were selected and transported to the laboratory immediately. The fruit were washed with distilled water and then air-dried at ambient temperature using a fan.