Abstract
A computer-aided on-line real-time monitoring system for plant cell bioprocesses was established and applied to the cultivation of Perilla frutescens plant cells in a bioreactor. This system calculated several informative process variables which were useful for the identification of the physiological states of the plant cells during cultivation. Some variables, such as the respiratory quotient (RQ), pH, and specific carbon dioxide evolution rate (SCER), could be used for the identification of the growing phase of cell cultures. The results also suggest that the oxygen uptake rate (OUR) and the specific OUR (SOUR) may depend on the accumulation of anthocyanin (a secondary metabolite) in P. frutescens cell cultures.
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