The evolution of HCN increased significantly during the ageing process of slices of potato (Solanum tuberosum L.) tubers in 24 h. Concomitantly, the activity of β-cyanoalanine synthase (CAS)(E.C. 18.104.22.168) was greatly enhanced in the same ageing period. Both the activity of CAS and the evolution of HCN were stimulated by 1-aminocyclopropane-1-carboxylic acid (ACC) and inhibited by salicylic acid (SA). It was also shown that the production of endogenous ethylene in aged slices exhibited a similar increase. Ethylene production was also affected by ACC and SA. A possible relationship between ethylene production, HCN evolution and the stimulation of CAS activity is discussed.
Wen, J. Q., Huang, F., Liang, W. S., & Liang, H. G. (1997). Increase of HCN and β-cyanoalanine synthase activity during ageing of potato tuber slices. Plant Science, 125(2), 147–151. https://doi.org/10.1016/S0168-9452(97)00065-4