Fruit resumes

GERBER M, BOUTRON-RUAULT M c and HEREBERG s et al. (2002) Food and cancer state of the art about the protective effect of fruits and vegetables , Bull Cancer, 89, 293-312. Resum.htm. 

Large changes in the amounts of atropine [a mixture of (/ )- and (S)-hyoscyamine] present in Atropa belladonna occur diumally and seasonally (Waller and Nowacki, 1978). The amount of atropine in leaves is greatest at about 6 00 P.M., whereas the atropine concentration of the fruits peaks at about 4 00 p.m. The smallest amount of atropine in the leaves occurs at 10 00 a.m. (Waller and Nowacki, 1978). Although undifferentiated calli of this species do not produce hyoscyamine (18), production resumes when roots form on the callus. Thus, the accumulation of this alkaloid seems to be developmentally regulated. Root cultures of Hyocyamus niger also produce hyoscyamine (Flores et al., 1987). 

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