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Ethylene production from various biological samples. (A) Plant physiology: circadian clock in A. thaliana with a peak in the mid-subjective day (Thain et al. 2004); (B) early detection of B. cinerea (grey mould) infection in tomato fruits. Real-time production by artificially inoculated tomato fruits (at t = 0 h) with B. cinerea (filled circles) starts rising 1 day before visible infection as compared with uninfected fruit injected with water (open circles) (Cristescu et al. 2002).
