Lateral root bridging as a strategy to enhance L-DOPA production in Stizolobium hassjoo hairy root cultures by using a mesh hindrance mist trickling bioreactor |
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Authors: | Sung Lin-Shiang Huang Shih-Yow |
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Institution: | Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan. |
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Abstract: | Stizolobium hassjoo hairy roots exhibited a lateral root bridging behavior, enabling not only root dry weight but enhancement of intracellular L-DOPA content. When a single root tip was exerted a proper hindrance, the primary root growth was inhibited while lateral roots were profusely induced. The hindrance-induced lateral roots from individual primary root could bridge together under appropriate inoculation densities, leading to high density hairy root cultures producing secondary metabolites. In the present paper, a novel bioreactor was proposed based on a strategy of lateral root bridging by utilizing mesh as a hindrance, called "mesh hindrance mist trickling bioreactor (MHMTB)". Significant improvements of dry weight and L-DOPA production by using MHMTB were 1.8 and 2.2-folds, respectively, higher than those in the control run without the mesh hindrance within the root bed. |
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Keywords: | lateral root bridging L‐DOPA Stizolobium hassjoo hairy root culture mesh hindrance mist trickling bioreactor |
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